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Dissertations / Theses on the topic 'Graphene - Photocatalysis'

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Published: 7 September 2023

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1

Chalangar, Ebrahim. "Graphene-based nanocomposites for electronics and photocatalysis." Licentiate thesis, Linköpings universitet, Fysik, elektroteknik och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157095.

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The development of future electronics depends on the availability of suitable functional materials. Printed electronics, for example, relies on access to highly conductive, inexpensive and printable materials, while strong light absorption and low carrier recombination rates are demanded in photocatalysis industry. Despite all efforts to develop new materials, it still remains a challenge to have all the desirable aspects in a single material. One possible route towards novel functional materials, with improved and unprecedented physical properties, is to form composites of different selected
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2

Sass, Danielle. "Nano silver-Iron-reduced graphene oxide modified titanium dioxide photocatalyst for the remediation of Organic dye in water systems." University of the Western Cape, 2018. http://hdl.handle.net/11394/6274.

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Magister Scientiae - MSc (Chemistry)<br>Drinking water with high concentrations of inorganic and organic contaminants can cause adverse health defects. Specifically methyl orange dye is an organic water contaminant that has been known (along with others like methyl blue etc.) to have an increase in our water systems over the past few years due to increasing demand in industrial processes. It is therefore of utmost importance to remediate organic contaminants and ultimately enable prevention. The contaminants can be removed by photocatalysis. Anatase TiO2 is known for its photocatalytic d
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Hamandi, Marwa. "Élaboration et caractérisation d’oxydes de Titane de Morphologie Contrôlée : application à la Photodégradation de Polluants Organiques." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1077/document.

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Ce travail se résume en deux objectifs principaux. Le premier concerne l'élaboration de matériaux nanohybrides de dioxyde de titane (sous forme sphérique ou tubulaire) décoré par des allotropes de carbone (fullerène fonctionnalisé ou graphène). Le deuxième objectif consiste à l'évaluation de ces différents nanomatériaux dans la photodégradation de l'acide formique (AF) sous irradiation UV. Un effet bénéfique des allotropes de carbone sur l'activité photocatalytique des nanohybrides a été observé suite à l'augmentation de la durée de vie des paires électron-trou photogénérées. Dans un premier t
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Tomarchio, Flavia. "Nanomaterials-based inks for flexible electronics, energy and photocatalytic applications." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275888.

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Due to the combination of their electronic, optical and mechanical properties, graphene and other layered materials (GRMs) have great potential for applications such as flexible optoelectronics and energy storage. Given that GRMs can be dispersed in solvents, solution processing is a particularly interesting approach that allows large volume production with tailored properties according to the targeted applications. \par In this dissertation I investigate liquid phase exfoliation and formulation of GRMs-based inks for flexible (opto) electronics, energy and photocatalysis. First I develop a pr
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Sass, Danielle Thandi. "Nano silver-iron-reduced graphene oxide modified titanium dioxide photocatalyst for the remediation of organic dye in water systems." University of the Western Cape, 2018. http://hdl.handle.net/11394/6410.

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Magister Scientiae - MSc (Chemistry)<br>Drinking water with high concentrations of inorganic and organic contaminants can cause adverse health defects. Specifically methyl orange dye is an organic water contaminant that has been known (along with others like methyl blue etc.) to have an increase in our water systems over the past few years due to increasing demand in industrial processes. It is therefore of utmost importance to remediate organic contaminants and ultimately enable prevention. The contaminants can be removed by photocatalysis. Anatase TiO2 is known for its photocatalytic d
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6

Papa, Letizia. "Synthesis of hybrid nanosheets of graphene oxide, titania and gold and palladium nanoparticles for catalytic applications." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-19062017-083751/.

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Nanocatalysis has emerged in the last decades as an interface between homogeneous and heterogeneous catalysis, offering simple solutions to problems that conventional materials have not been able to solve. In fact, nanocatalyst design permits to obtain structures with high superficial area, reactivity and stability, and at the same time presenting good selectivity and facility of separation from reaction mixtures. In this work, we prepared hybrid structures comprising gold, palladium and silver nanoparticles (Au, Pd and Ag NPs), titanate nanosheets (TixO2), graphene oxide (GO), and partially r
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7

Moussa, Hatem. "Influence de l’association de quantum dots ZnO avec des ions Cu²+ sur leur (photo)toxicité. Nouveaux matériaux ZnO/rGO pour la photocatalyse solaire." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0036/document.

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Ces dernières années, les énormes progrès réalisés en nanotechnologie ainsi qu’en science des matériaux ont conduit à la préparation de nombreuses nouvelles nanoparticules sans réellement connaître l’ensemble des propriétés associées à leurs dimensions. La première partie de notre travail vise à évaluer les risques et les problèmes associés aux nanomatériaux, en termes de toxicité, en utilisant des nanoparticules de ZnO. Nous avons tout d’abord étudié la capacité de ces nanoparticules à générer des espèces réactives d’oxygènes (EROs) sous irradiation UV en utilisant trois types des quantum dot
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8

Nasr, Maryline. "Elaboration of oxides membranes by electrospinning for photocatalytic applications." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT210/document.

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De nos jours, les produits chimiques toxiques industriels ne sont pas toujours traités proprement, et leurs contaminants peuvent directement affecter la sécurité de l'eau potable. La photocatalyse, «une technologie verte» est une approche efficace et économique qui joue un rôle important dans la conversion de l'énergie solaire et la dégradation des polluants organiques. Ce manuscrit de thèse rapporte sur le développement des matériaux avancés (basés sur TiO2 et ZnO) susceptibles d'exploiter l'énergie solaire renouvelable pour résoudre les problèmes de pollution environnementale. Une partie de
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9

Herring, Natalie. "Formation Mechanisms and Photocatalytic Properties of ZnO-Based Nanomaterials." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/494.

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Zinc Oxide (ZnO) is one of the most extensively studied semiconductors because of its unique properties, namely, its wide band gap (3.37 eV) and high excitation binding energy (60 meV). These properties make ZnO a promising material for uses in a broad range of applications including sensors, catalysis and optoelectronic devices. The presented research covers a broad spectrum of these interesting nanomaterials, from their synthesis and characterization to their use as photocatalyts. A new synthetic approach for producing morphology controlled ZnO nanostructures was developed using microwave i
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He, Jijiang. "Preparation and photocatalysis of graphite carbon nitride based photocatalysts." Thesis, Curtin University, 2015. http://hdl.handle.net/20.500.11937/521.

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The connection between ritual and the interior is interrogated through a theoretical framework integrating Van Gennep’s Rites of Passage Theory and Turner’s Theory of Liminality. A multi-faceted methodological framework is developed from the interrogation of the disciplinary edges of multiple methodologies, addressing the experiential, cultural and subjective dimensions of ritual. This new way of exploring the interior demonstrates how knowledge can be acquired from the body’s immersion in unfolding ritual situations, revealing elements of ritual and interior in relation to one another and the
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Jia, Tiantian. "Photocatalytic hydrogen production over layered materials." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:6426c02b-f2b1-4326-a767-2384c303faf3.

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The technology of semiconductor-based photocatalytic water splitting to produce hydrogen using solar energy has been considered as one of the most important approaches to solve the world energy crisis. Therefore, the development of the effective semiconductor photocatalysts has undergone considerable research. However, the traditional photocatalysts suffer from the negative effects from rapid charge recombination, which reduces the excited charges by emitting light or generating phonons. Efficient charge separation and fast charge transport, avoiding any bulk/surface recombination, are fundame
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Hu, Xiaoyue. "Synthesis and Characterization of Graphene Oxide-modified Bi2WO6 and Its Use as Photocatalyst." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31459.

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The control of environmental pollution, particularly in wastewater treatment, is one of the major concerns of the 21st century. Among the currently available pollution control technologies, photocatalysis is one of the most promising and efficient approaches to the reduction of pollutants. Graphene, a carbon nanomaterial with specific physical and chemical properties, has been reported as a promising potential new catalyst material in this field. A Bi2WO6 photocatalyst modified with graphene oxide was synthesized in a two-step hydrothermal process. Compared with pure Bi2WO6, the modified photo
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13

Barrois, Pauline. "Textiles de protection fonctionnalisés auto-décontaminants vis-à-vis d'agents chimiques associant des propriétés photocatalytiques et d'adsorption/filtration." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAF006/document.

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Ce projet s’inscrit dans la contribution à l’élaboration de tenues de protection vis-à-vis d’agents chimiques de guerre : les combinaisons actuelles ont un rôle de barrière, qui stoppent le contaminant sans le dégrader, conduisant à un risque de contamination croisée accru. L’idée novatrice est de recouvrir ces textiles avec une couche intelligente multifonctionnelle et transparent associant un composé actif (TiO2, capable de photo-oxyder les composés toxiques sous irradiation à température ambiante) à un composé passif (nanostructures carbonées, permettant de stocker temporairement les produi
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Guidetti, Gloria <1990&gt. "Smart surfaces for environmental remediation. Highly efficient photocatalytic nanocomposites incorporating metal oxides and graphene related materials." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8572/1/TESI_Dott_GloriaGuidetti.pdf.

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After the Kyoto Protocol, the World Health Organization estimated in2016 that up to date one out of every nine deaths was related to outdoor/indoor air pollution[1]. As a consequence the World’s population expressed the need to have Healthier Cities and the design of new technologies to eliminate air pollutants[e.g. nitrogen oxides(NOx)and organics] by using natural sunlight, and their integration into smart cities became the centre of an ever increasing research[2]. Photocatalysts based on TiO2 are already on the market[3] and embedded in commercial products, such as cement[4]. However, they
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15

Nguyen, Chinh Chien, and Chinh Chien Nguyen. "Novel strategies to develop efficient titanium dioxide and graphitic carbon nitride-based photocatalysts." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/30378.

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Afin de résoudre les problèmes environnementaux et énergétiques modernes, ces dernières années ont vu le développement de catalyseurs photocataytiques capables d’utiliser la lumière solaire. En effet, les possibles applications des semiconducteurs présentant des propriétés photocatalytiques dans les domaines de la production d’hydrogène ou la dégradation de polluants organiques ont généré un grand intérêt de la part de la communauté scientifique. Actuellement, les photocatalyseurs à base de dioxyde de titane (TiO₂) et de nitrure de carbone graphitique (g-C₃N₄) sont considérés comme les matéria
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Alam, Tanvir E. "Metal Oxide Graphene Nanocomposites for Organic and Heavy Metal Remediation." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/3945.

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This thesis consists of two research problems in the water decontamination area. In the first work, the main focus is to understand the structure and photocatalytic activity of titanium dioxide with graphene (G-TiO2) which is synthesized by using sol-gel method. The photocatalytic activity of TiO2 is limited by the short electron hole pair recombination time. Graphene, with high specific surface area and unique electronic properties, can be used as a good support for TiO2 to enhance the photocatalytic activity. The obtained G-TiO2 photocatalysts has been characterized by X-Ray Diffraction (XRD
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17

Marek, Jiří. "Fotokatalytický rozklad vody oxidovými polovodiči modifikovanými grafenem/grafenoxidem." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-217159.

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This master thesis deals with the topic of alternative production of hydrogen as the energy carrier of the future. The primary focus is on the production of hydrogen based on photocatalytical water splitting in the presence of semiconductor materials (especially modified and unmodified TiO2). The aim of the thesis is a synthesis of nanostructured oxide, graphene/graphene oxide particles and its composites, and a study of its structures and photocatalytical properties regarding photolysis of water. Products of the syntheses are described from the point of view of phase composition, surface area
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18

BELLI, ALBERTO. "Comparison between Commercial and Recycled Carbon-Based Fillers and Fibers for the Development of Smart and Sustainable Multifunctional Mortars." Doctoral thesis, Università Politecnica delle Marche, 2019. http://hdl.handle.net/11566/263335.

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La società moderna è in gran parte fondata sulle infrastrutture che garantiscono la fornitura di beni, trasporti e mezzi di comunicazione. La loro salvaguardia e il risparmio delle risorse necessarie per il loro funzionamento è di crescente importanza per l’Ingegneria civile. Per questo motivo, la ricerca sui materiali da costruzione si sta concentrando sul riutilizzo di sottoprodotti industriali riciclati, per un’industria edilizia più sostenibile. L’Ingegneria dei materiali, grazie al recente sviluppo di nanomateriali ad alte prestazioni, propone molteplici spunti per la realizzazione di mat
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19

SU, SIN-YU, and 蘇芯褕. "Photocatalysis of Sulfadiazine by Graphene/TiO2 Composite Photocatalysts." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/rv5j7p.

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碩士<br>國立高雄第一科技大學<br>環境與安全衛生工程系碩士班<br>105<br>This study investigated liquid-phase photocatalysis of sulfadiazine(SDZ) by both titanium dioxide (TiO2) and graphene doped TiO2 (GR/TiO2) thin-film. The thin-film photocatalysts were prepared with an electrophoretic deposition (EPD) technique by immobilizing P-25 TiO2, with various amount of GR, onto pure titanium (Ti) metal plates. This study explored the effects of preparation recipes on the photocatalytic activities of prepared samples, which were determined by the degradation rate of SDZ assisted by the prepared samples irradiated with a near-UV
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Te-FuYeh and 葉德夫. "Graphene Oxide Quantum Dots for Photocatalysis and Photoluminescence." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/78377524424669035225.

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Kuo, Cheng-Chi, and 郭承冀. "Thickness-Controlled Graphene Hybrid Interface for HighlyEnhanced Photocatalysis." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/54531323866026428836.

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碩士<br>國立中山大學<br>化學系研究所<br>102<br>Graphene has been widely studied in hybrid nanocomposites catalyst because of its unique chemical and electrical properties. However, the enhancement mechanisms in photocatalysis of graphene hybrid catalyst with respect to the number of stacked graphene sheets have not been systematically studied before. In this work, we fabricated a graphene stacking hybrid film (GSHF) comprised of controlled number of stacked graphene layer and photoactive semiconductors (TiO2, ZnO) to investigate the variation of photocatalytic activities. Three layer graphene stacked GSHF e
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Lui, Gregory. "Graphene-Wrapped Hierarchical TiO2 Nanoflower Composites with Enhanced Photocatalytic Performance." Thesis, 2014. http://hdl.handle.net/10012/8337.

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Increasing energy demands as well as the depletion of traditional energy sources has led to the need for the development and improvement of energy conversion and storage technologies. Concerns regarding climate change and environmental awareness has also created increased support for renewable energy and clean technology research. One technology of interest is the photocatalyst, which is a material that is able to use natural light irradiation to create electrical currents or drive useful chemical reactions. For this purpose, a strong photocatalytic material has the following properties: i) st
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Wang, Yu-Hung, and 王裕鴻. "Fabrication of Graphene Films by Photocatalysis of Graphene Oxide Reduction Reaction on Silicon Nanowire Arrays." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/44772107551048794590.

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碩士<br>國立中興大學<br>材料科學與工程學系所<br>105<br>Graphene has attracted much attention because it has lower resistivity and larger thermal conductivity comparing with silver and diamond. In general, the formation of graphene is using chemical vapor deposition method. Several researches reported that graphene layer can be formed by the chemical reduction of graphene oxide (GO). However, the chemical reduction method will cause environment pollution. In this study, the graphene films were fabricated by photocatalytic reduction of GO. Silicon-nanowire-array photocatalysts formed by metal-assisted chemical et
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Cheng, Shih-Yuan, and 鄭仕元. "Growth of reduction Graphene/Titanium oxide nanocomposite employed in photocatalysis." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/6j3rmv.

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碩士<br>國立臺灣海洋大學<br>光電科學研究所<br>102<br>In this study , we used hydrothermal reaction to grow the titanium oxide　nanostructure for photocatalysis reaction . For improving the efficiency of photocatalysis reaction with the photocatalyst, we combined the reduce grapheme oxide (rGO) which has superior conductivity to upgrade the photocatalysis reaction of titanium oxide .Next , we used Silver mirror reaction to coat silver nanoparticles on the rGO-TiO2, which can promote the efficiency of the photocatalyst by surface plasmon resonance(SPR) between silver nanoparticles and TiO2 . Because the silver na
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HSIEH, TUNG-HAN, and 謝東翰. "Study on photocatalysis in TiO2-based nanocomposites coupled with silver and graphene oxide." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/fydayb.

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碩士<br>國立高雄科技大學<br>機械工程系<br>107<br>The semiconductor oxide and the metal oxide semiconductor material are prepared by the electrospinning method, and the photocatalytic decomposition of methylene blue (MB) is carried out by using a self-made photocatalyst device. High-resolution scanning electron microscopy, transmission electron microscopy, and X-film diffractometer were used to investigate the structural properties and surface morphology of the material. The topic of this paper is to element with a tin oxide (TiO2) nanofiber structure, and discuss the optimal parameters for the production of
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Wang, Yi-Ting, and 王儀婷. "Fabrication of Reduced Graphene Oxide Composite and Silver Molybdate Modified Electrodes for Application to Electrochemical Sensors, Biosensors and Photocatalysis." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/2zn7sy.

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碩士<br>國立臺北科技大學<br>化學工程研究所<br>104<br>We have fabricated different composite modified electrdoes for application to electrochemical sensors, biosensors and photocatalysis. For instance, in the fisrt part we describe the use of a nanocomposite consisting of graphene and β-cyclodextrin (β-CD) which was used to modify a glassy carbon electrode (GCE) to serve as a matrix for immobilization of hemoglobin (Hb). The composite was characterized by scanning electron microscopy (SEM), Ultraviolet-visible spectroscopy (UV-vis) and Fourier-transform infrared (FTIR) spectroscopy. The modified electrode displ
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YANG, SHENG-WEI, and 楊聖偉. "Synthesis, Characterization and Photocatalytic Performance of Magnetic Cu2O/Graphene Photocatalysts." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/x26n5b.

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碩士<br>國立高雄應用科技大學<br>化學工程與材料工程系博碩士班<br>104<br>Photocatalysis can be effectively applied in removing the pollutants in the water, and it has the significant problem that need to be solved. As a result, this research mainly focused on synthesizing magnetic photocatalysts which can effectively remove organic pollutants in the water under visible light. The organic pollutants (Methyl orange, MO) can be transformed into CO2¬ and H2O, etc. The used photocatalysts can be recycled by magnetic process. The octahedron, hollow sphere, and dodecahedron Cu-2O/graphene were synthesized via sol-gel and solvot
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Sheu, Fu-Jye, and 許富傑. "Investigation on Photocatalytic Characteristics of Ag-TiO2-graphene and Ag3PO4-TiO2-graphene oxide Ternary Nanocomposite Photocatalysts." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/17670131593515168028.

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碩士<br>國立暨南國際大學<br>應用材料及光電工程學系<br>104<br>Abstract In this study, photocatalytic reduction and ion exchange methods were employed to fabricate the ternary nanocomposite photocatalysts of Ag-TiO2-graphene (ATG) and Ag3PO4-TiO2-graphene oxide (APTGO), respectively. The contents of graphene and Ag in ATG were adjusted, and the molar ratio of Ag3PO4 to TiO2 in APTGO was tuned. The properties and photocatalytic activity of the nanocomposites were examined, and their photodegradation mechanisms were explored. When an ATG had more graphene, light absorption and charge transport were enhanced, l
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Yang, Yu-Ping, and 楊喻評. "Synthesis and Photocatalytic Activity of Titania Photocatalyst Doped with Platinum and Graphene." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/90472497012312299301.

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碩士<br>國立中興大學<br>化學工程學系所<br>102<br>In this thesis, the purpose is to study the photocatalytic activity of titania photocatalyst, which is supported by platinum and doped with graphene nonoplatelet (GNP). The preparation of the novel photocatlyst is as follows：sythesis of titania by sol-gel method, deposition of platinum by photoreduction, then doping with GNP. The photocatalytic activity of the catalyst is tested by photodegadation of methyl orange using quartz glass reactor under the UV light illumination. The parameters of catalyst preparation include temperature of calcination, amount of wat
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Liu, Yi-Yi, and 劉懿儀. "Study of photocatalytic production and preparation on Graphite oxide Composite Photocatalyst." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9r457a.

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碩士<br>國立東華大學<br>材料科學與工程學系<br>107<br>In this study, the graphite oxide(GO) prepared by improved Hummer's method was used as the O2 evolution photocatalyst, and the H2 evolution photocatalyst was Rh doped SrTiO3 (denoted as SrTiO3:Rh) with Ru nanoparticle as cocatalyst. All the catalysts were characterized by X-ray diffraction spectrometer (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-visible Spectrophotometer (UV-vis), Fourier transform infrared spectrometer (FT-IR), Raman spectrometer (Raman) and X-ray photoelectron spectroscopy (XPS) to analyze the
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Weng, Hau-Ting, and 翁豪廷. "CuS-ZnS1-xOx/g-C3N4 and ZnS1-xOx/graphene photocatalysts for efficient photocatalytic hydrogen production." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/70923339647681472882.

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碩士<br>逢甲大學<br>化學工程學系<br>104<br>In this study, CuS-ZnS1-xOx/g-C3N4 organic-inorganic heterostructured nanocomposite which was prepared by means of a hydrothermal method, exhibited good activities for photocatalytic hydrogen production. Effects of the ZnS1-xOx process condition, Cu(NO3)2 precursor concentration and g-C3N4 content on the morphology, crystalline properties, optical property, surface chemistry and photocurrent were investigated by using field-emission scanning electron microscope (FESEM), X-ray diffraction (XRD), field-emission transmission electron microscopy (FETEM), X-ray photoe
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Szu-TingChen and 陳思婷. "Photocatalytic degradation of DMS by graphene/S, N/TiO2 nanocomposite photocatalyst under the visible light." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/zt5a2p.

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WAN-HUAMAO and 毛婉驊. "Photocatalytic degradation of toluene in indoor air by graphene/S, N/TiO2 nanocomposite photocatalysts using a fluorescent lamp." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/37x2v4.

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CHI, HAN-TING, and 姬瀚珽. "The photocatalysts of silver vanadium oxide and silver vanadium oxide/graphene oxide composites: Synthesis, characterization, photocatalytic activity and mechanisms." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/35384181361840967226.

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碩士<br>國立臺中教育大學<br>科學教育與應用學系碩士班<br>105<br>In this study, a series of the silver vanadium oxide and silver vanadium oxide composite graphene oxide (GO) are prepared using hydrothermal methods, and using the visible light as the light source of degradation of Atrazine and CV. In the experiment, first, AgNO3 、NH4VO3 and commercial GO are used as the starting material, then seperately dissolved in DI water, stirring and mixing, and using NH4OH to adjust the pH value. Then the aqueous solution is placed in a 23ml autoclave and put into an oven, and heated. The ultimate products of photocatalyst ar
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Yun-YanTsai and 蔡昀諺. "Photocatalytic degradation of formaldehyde in indoor air by graphene/S, N/TiO2 nanocomposite photocatalyst using a fluorescent lamp." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/6egfsq.

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碩士<br>國立成功大學<br>環境工程學系<br>105<br>Nowadays, people spend more than 80% of time in indoor environments in modern social way of life. Therefore, indoor air quality should be paid more attention due to the indoor air pollutants impact on human health through directly chronic inhalation. Formaldehyde most often appears in the indoor environment where can be escaped from furnishing, cleaning agents and paints. And it has been confirmed to be carcinogenic to the human body. Thus, the elimination of formaldehyde is essential for improving air quality. Indoor environmental conditions are usually room t
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Hsu, Hsin-Cheng, and 許新城. "Graphene Oxide Based Photocatalyst for CO2 Reduction." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/79201113028210992482.

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博士<br>國立臺灣科技大學<br>材料科學與工程系<br>102<br>Artificial photosynthesis is one of the solutions to solve global warming and mitigate the rising demands of energy consumption. Photocatalytic conversion of carbon dioxide (CO2) to hydrocarbons such as methanol makes possible simultaneous solar energy harvesting and CO2 reduction, resulting in solution for both the energy demands and environmental problems. This work describes a promising photocatalyst based on improved graphene oxides (iGOs), which have high photocatalytic conversion efficiency of CO2 to hydrocarbon fuels. Improved Hummer’s method has bee
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Chen, Jia-Xin, and 陳佳昕. "Construction of Z-scheme Photocatalyst System Consisting of Ag2O/Ag/Graphene Oxide Nanostructure for Photocatalytic Reduction of CO2 to Methanol." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/em3q85.

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碩士<br>國立中興大學<br>化學工程學系所<br>107<br>Photocatalytic reduction of CO2 is a promising technology to both reduces the greenhouse gas emissions and provides alternative energy sources. Here, we designed a hierarchical Z-scheme photocatalyst consists in an Ag2O/Ag/GO nanostructure, in which Ag was deposited on the GO and subsequently Ag2O was oxidized on the surface of Ag/GO. Transmission Electron Microscopy (TEM), X-ray Diffractometer (XRD), X-ray Photoelectron Spectroscopy (XPS), UV-vis Diffuse Reflectance Spectra (UV-vis DRS), Surface Area and Porosity Analyzer (BET), Fluorescence Spectrophotometer
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Liang, Yung-Chen, and 梁詠蓁. "Applications and property of TiO2/Graphene Photocatalyst composites." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/63391183376234260612.

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碩士<br>國立勤益科技大學<br>化工與材料工程系<br>102<br>The photocatalyst materials are usually TiO2 due to its high photocatalytic performance. This article explores the TiO2 photocatalyst modified with four different graphene modified by hydrothermal/ calcining and hydrothermal method, and various mass ratio of the graphene. (Photocatalyst composites were label as TxYC, x: weight percent, Y: graphene species, C: Calcining). Photocatalyst composites were characterized by field-emission scanning electron microscope (FESEM), X-ray diffraction(XRD), Raman spectroscopy, UV-vis diffuse reflectance spectra(UV-vis DRS
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Wei, Yu-Shao, and 魏宇劭. "Synthesis of Cu2O/graphene and Cu/graphene Photocatalysts for Degrading Emerging Contaminants in Visible Light." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/chye4j.

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碩士<br>國立高雄應用科技大學<br>化學工程與材料工程系博碩士班<br>103<br>Recently, the sulfamethoxazole (SMX), one of the emerging contaminants in surface waters, has been detected at high frequency. SMX in the water system was a potential risk to the ecosystem balance. Unfortunately, the traditional treatment techniques can not remove SMX completely. Thus, the objective of this study is to synthesize an efficient photocatalyst for degrading emerging contaminants under visible light.The Cu2O/graphene photocatalysts were synthesized via a simple wet-chemical method by using CuSO4·5H2O and graphene oxide as precursors and
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Yi-ShengWang and 王怡升. "Photocatalytic Hydrogen Peroxide Production by Graphene Oxide under Sunlight." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/88347245712758975301.

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碩士<br>國立成功大學<br>環境工程學系<br>104<br>Hydrogen peroxide (H2O2) is a clean oxidant and fuel that is desirable in many real-world applications. Current industrial manufacturing of H2O2 involves expensive, noble metal-based catalysts with high energy demand. Searching for more environmentally sustainable process for H2O2 production merits greater attention in research. In this work, the potential of graphene oxide (GO), an emerging, two-dimensional carbon-based nanomaterial, as a new photocatalyst toward H2O2 photoproduction driven by solar energy was explored. The result indicates that 〉 1 mM of H2O
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CHEN, TSAI-TING, and 陳采庭. "The Photocatalysts of Bismuth Silicate/ Graphene Oxide and Bismuth Silicate/ Graphitic Carbon Nitride Composites: Synthesis, Characterization, Activity, and Their Photocatalytic Degradation of Organic Pollutants." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/8kq84h.

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碩士<br>國立臺中教育大學<br>科學教育與應用學系碩士在職專班<br>105<br>In this study, bismuth silicate and bismuth silicate composite graphene oxide (GO) and composite graphitic carbon nitride (g-C3N4) are prepared using autoclave hydrothermal methods. The novel heterojunctions of Bi12SiO20/GO and Bi12SiO20/g-C3N4 are fabricated by the hydrothermal method for the first time. Bismuth silicate is prepared by Bi(NO3)3 and Na2SiO3, dissolved in an 3M NaOH aqueous solution and adjusted the pH value . The aqueous solution is then transferred into a 15 mL Teflon-lined autoclave and heated to 100oC for 4 hours. Bi12SiO20/GO or
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SHIH, CHING-HUA, and 施晶華. "Growth Mechanism of MoS2/Graphene Hybrid and Its Photocatalytic Application." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/a786s4.

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碩士<br>國立中正大學<br>光機電整合工程研究所<br>105<br>Carbon dioxide (CO2) emission causing global warming has been a crucial issue these years. In addition to reducing the amount of greenhouse gas emission, scientists discover that photocatalytic conversion of carbon dioxide, a process of chemical reduction whereby carbon dioxide is reduced to CO2 or hydrocarbons under solar excitation, turns out to be a feasible method to solve the environmental emergency and energy shortage by reutilizing CO2 to fuels. As a result, it is very important to develop high-performance photocatalysts to enhance photocatalytic act
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43

周欣穎. "Charge Carrier Dynamics and Photocatalytic Properties of Cu2O/Graphene Nanoheterostructures." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/75247434176981810590.

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碩士<br>國立交通大學<br>材料科學與工程學系<br>100<br>This work reported the one-step preparation of Cu2O/RGO nanoheterostructures with the photochemical reaction method. By modulating the concentration of GO employed in the reaction, the amount of Cu2O nanocrystals grown on RGO surface can be readily controlled. Because of the considerably high electrical conductivity of RGO, the photoexcited electrons of Cu2O would preferentially transfer to RGO, leaving positively charged holes in Cu2O to achieve charge carrier separation. Time-resolved photoluminescence spectra were collected to quantitatively analyze the e
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TSENG, JUI-YANG, and 曾叡揚. "Study on Graphene-Based Photocatalyst for Photoreduction of Carbon Dioxide." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/z3y45d.

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Wu, Han, and 吳翰. "Preparation of TiO2/Graphene Photocatalysts for the Application in Decomposition of Organics." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/p66k24.

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碩士<br>國立雲林科技大學<br>化學工程與材料工程系<br>103<br>In this study, the development of new visible light photocatalyst target, hoping to enhance the incorporation of impurities in the photocatalyst efficiency in the use of visible light. Indoors general fluorescent lamp of UV energy is only 0.1 ~ 1μW, for the general photocatalyst are not sufficient to produce the decomposition of pollutants effect. Therefore, how to improve the above problem is the most important breakthrough in improving the general principle by the photocatalyst photocatalyst fast electron hole recombination question the effectiveness an
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朱冠伍. "Photocatalytic hydrogen production performance of ZnS/polyaniline and ZnS/graphene composite." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/umxsaw.

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碩士<br>逢甲大學<br>化學工程學系<br>103<br>Graphene@ZnS and polyaniline/ZnS (P-ZnS) nanoparticle were use as hydrogen production photocatalysts. In first part, ZnS nanoparticles were prepared as the core material by a solvothermal process with zinc acetate and thiourea as precursors. ZnS nanoparticles were encapsulated by polyaniline to make the composite photocatalysts. Properties of the photocatalysts were characterized by field-emission scanning electron microscope (FESEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HRTEM), ultravi
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曾威翔. "Preparation of copper-loaded graphene oxide for photocatalytic reduction of CO2." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/pt2jsn.

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48

Sinha, Madhulika, and 馬杜力卡. "Photocatalytic and Phototherapeutic Applications of Metal Oxide and Graphene-based Nanomaterials." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/7nfank.

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博士<br>國立清華大學<br>化學系所<br>105<br>Developing of a simple and cost-effective strategy to diagnose and treat cancer with single and minimal dosage through noninvasive methods are highly challenging. To make such theranostic strategy effective, single light induced photothermal and photodynamic reagent with dual modal imaging capability is highly desired. Cancer has long been considered a huge threat to the world population, leading to millions of threat worldwide. Often cancer leads to weaker immune system in the body, making it easier for bacterial attacks and secondary infections. Bacterial patho
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49

Kumar, Aniket. "Metal Oxide-Decorated Graphene Oxide Nanocomposites for Catalytic and Photocatalytic Applications." Thesis, 2018. http://ethesis.nitrkl.ac.in/9409/1/2018_PhD_AKUMAR_513CY1003_Metal.pdf.

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Graphene and graphene-based materials, owing to their unique physical and chemical properties, have attracted considerable attention across the scientific communities worldwide. It has heralded a revolution in almost all the branches of materials science and chemistry. The attractive properties of graphene have led the extensive investigations to design and develop low-cost and high yield preparation protocols for chemically-derived graphene (graphene oxide). Graphene oxide (GO), a two-dimensional sheet of sp2 hybridized carbon, has received increasing attention as it possesses similar propert
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Lu, Ways, and 呂維斯. "Preparation of Visible Light-driven Fe3O4/SiO2/Ag3PO4/graphene oxide Photocatalyst." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/z9ahd7.

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碩士<br>國立高雄應用科技大學<br>化學工程與材料工程系博碩士班<br>104<br>Ag3PO4, with a band gap of 2.45 eV, shows excellent photocatalitc ability under visible light irradiation. Ag3PO4 was reported to integrate with magnetic materials for recycle use. Up to date, the combination of Fe3O4/ Ag3PO4 composite with graphene oxide (GO) was not found. Accordingly, a composite of Ag3PO4 and magnetic silica (Fe3O4@SiO2) was synthesized in this study, the resultant product Fe3O4@SiO2/Ag3PO4 was mixed with GO for investigating the photocatalytic activity of Fe3O4@SiO2/Ag3PO4/GO. First, the Fe3O4 nanoparticles prepared by co-preci
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