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Dissertations / Theses on the topic 'G-C3N4'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Zhang, Xiao. "Synthesis and Properties of Layered g-C3N4 and Their Applications." Thesis, Curtin University, 2021. http://hdl.handle.net/20.500.11937/84166.

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Graphitic carbon nitride (g-C3N4) as a metal-free photocatalyst is a prevalent photocatalyst used for visible light driven catalysis. This thesis focuses on synthesis and characterization of layered g-C3N4 based materials for photocatalytic applications ranging from hydrogen generation to wastewater treatment. Morphology control and heterostructure optimization are crucial for enhancing catalytic performances of the materials. The promising potential of layered g-C3N4 based materials as effective photocatalysts in energy and environmental fields is discussed in detail.

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2

Cadan, Fellipe Magioli. "Otimização da síntese de nitreto de carbono grafítico e a formação de heteroestruturas com trióxido de tungstênio." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/75/75135/tde-29092017-172815/.

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Este estudo propôs uma avaliação do papel dos três principais parâmetros clássicos da síntese do nitreto de carbono grafítico: temperatura final, tempo de permanência na temperatura final e taxa de aquecimento. Realizou-se a otimização da síntese, via metodologia de superfície de resposta, usando-se como variável-resposta a degradação fotocatalítica de um poluente-modelo (tartrazina). A significância estatística dos fatores foi confirmada, com 95% de confiança. Em seguida, um modelo de segunda ordem foi ajustado às melhores respostas e, no ponto de máxima degradação, as condições foram: 6

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3

Adekoya, Oluwatobi. "Design and Synthesis of Graphitic Carbon Nitride (g-C3N4) Based Materials for Rechargeable Batteries." Thesis, Griffith University, 2020. http://hdl.handle.net/10072/401444.

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Carbon nitrides are a unique family of nitrogen-rich carbon materials with multiple beneficial properties for effective alkali metal ion transport/storage. Graphitic carbon nitride (g-C3N4) is considered the most viable member of the carbon nitride family because of its high nitrogen content, wide structure with several nitrogen-defect pore sites, ease of synthesis, affordability, and scalability. Also, g-C3N4 delivers a lithium ion battery (LIBs) theoretical capacity of 524 mAh/g unlike graphite which records only 327 mAh/g. However, due to the ineffective intercalation/deintercalation reacti

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4

Jiménez-Calvo, Pablo Isaí. "Synthèses, caractérisations et performances de matériaux à base de g-C3N4 décorés avec des nanoparticules d´Au pour des applications (photo) catalytiques." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAF012/document.

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À ce jour, l’humanité est confrontée simultanément à une crise énergétique et environnementale due principalement à deux facteurs: la croissance démographique et la dépendance aux combustibles fossiles. C'est pourquoi l'urgence d'utiliser des sources d'énergie renouvelables, comme l'énergie solaire est une, solution potentielle. A ce titre, la production d'H2 décarboné par dissociation solaire de l'eau est une voie prometteuse. Néanmoins, pour atteindre l'objectif mentionné, il faut trouver un système photocatalytique (semi-conducteurs, SCs) idéal, qui nécessite quatre caractéristiques majeure

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5

Marchal, Clément. "Synthèse et réactivité de nanocomposites Au / g-C3N4 / TiO2 pour la production d’hydrogène par procédé photocatalytique sous illumination solaire et visible." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF011/document.

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Dans le contexte actuel d’une demande énergétique croissante associée à un appauvrissement des ressources fossiles, il devient urgent de trouver des sources d’énergies alternatives, écologiquement et économiquement viables. La photocatalyse est une voie prometteuse et innovante pour produire de l’hydrogène (H2) à partir d’énergies renouvelables. Le but est de développer des matériaux stables et efficaces pour amener le procédé à un niveau de maturité suffisant pour de possibles développements à moyen terme.Cette thèse est axée sur l’élaboration et l’optimisation de nouveaux systèmes composites

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6

Almeida, Monique Rocha. "Desenvolvimento de um dispositivo fotoeletroqu?mico a base de g-C3N4, Cu2O e CuO para clivagem da ?gua em H2 e O2." UFVJM, 2016. http://acervo.ufvjm.edu.br/jspui/handle/1/1311.

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Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-03-24T21:23:22Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) monique_rocha_almeida.pdf: 4635045 bytes, checksum: 2d203824a390ae82a5006e68b621c98b (MD5)<br>Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-04-20T19:40:16Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) monique_rocha_almeida.pdf: 4635045 bytes, checksum: 2d203824a390ae82a5006e68b621c98b (MD5)<br>Made available in DSpac

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7

Gholipour, Mohammad Reza. "Nanocomposites à base de g-C3N4 et ZnxCd1-xS comme photocatalyseurs pour la production d'hydrogène à partir de l'eau sous la lumière solaire." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/28325.

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Le processus de photocatalyse est l'un des moyens prometteurs d'utiliser l'énergie solaire à grande échelle pour différents types d'applications tels que la production d'hydrogène comme énergie propre ou encore la purification de l'eau et l'air contre les polluants et les produits chimiques nocifs. Néanmoins, le pourcentage de l’énergie du rayonnement solaire utilisé est généralement inférieur à 1%, en raison de la faible absorption de la lumière solair, de la rapide recombinaison de charge « électron-trou paires » et de l'instabilité photochimique. La modification de la structure des semi-con

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8

Chi, Zhilong. "Prospects for the application of advanced oxidation technology in the treatment of pharmaceutical wastewaters." Магістерська робота, Kyiv National University of Technology and Design, 2021. https://er.knutd.edu.ua/handle/123456789/19251.

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Advanced Oxidation Technology based on persulfate activation is an important part of advanced oxidation technology for water treatment, in which catalyst plays a very important role. In this master's thesis, LaCoO3/g-C3N4 catalyst was prepared by hydrothermal method and the catalytic degradation efficiency of LaCoO3/g-C3N4 catalyst for pharmaceutical wastewater was investigated, and the relationship between catalyst structure and degradation efficiency in catalytic activation of PMS was discussed. Based on the study of catalytic activated PMS oxidative degradation kinetic characteristics, inve

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9

Li, Yibing. "Graphitic Carbon-Based Functional Nanomaterials for Environmental Remediation and Energy Conversion Applications." Thesis, Griffith University, 2015. http://hdl.handle.net/10072/366091.

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Carbon-based nanomaterials have attracted significant attention due to their unique optical, electrical, thermal and mechanical properties. In recent years, a large number of carbon-based nanomaterials have been investigated including carbon nanotubes, graphitic carbon nitride (g-C3N4), graphene, carbon nanofibers, carbon nanodots (CNDs), heteroatom-doped carbon, and carbon-based materials obtained from biomass etc. The unique and superior properties of such carbon-based materials make them useful for a wide range of applications in the fields such as environmental remediation and energy conve

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10

Chen, Min-Hsuan, and 陳渂愃. "Application of g-C3N4/Bi2O2CO3 layered composite photocatalyst in dye degradation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/10609884262383423828.

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碩士<br>中原大學<br>環境工程學系<br>105<br>Nowadays, although TiO2 is widely used, because of rapid recombination and limited visible light absorption, resulting in low quantum efficiency and decreasing content, it is possible to overcome these problems by trying to find new photocatalysts. In this study, g-C3N4 / Bi2O2CO3 composite photocatalyst was synthesized by using self-made g-C3N4 and Bi2O2CO3 to enhance the effect of light absorption and reduce the recombination of electron-electric hole. g-C3N4 was prepared by urea at different calcination temperatures, method and time. Bi(NO3) 3．5H2O and Na2CO3

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11

Liu, Yu-Ling, and 劉鈺玲. "Preparation and Application of g-C3N4 / PEDOT: PSS Conductive Polymer Composite Fiber." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/wvm94t.

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碩士<br>中原大學<br>化學工程研究所<br>106<br>With the advancement of science and technology, industrial pollution and energy crisis have become more and more severe, and environmental issues have gradually received attention. Photocatalysts with advantages of tunable optical and electrical properties, low cost, high photocatalytic activity, chemical stability and non-toxicity are widely studied by scientists. In this study, composite fiber materials composed of g-C3N4 and PEO/PEDOT:PSS were prepared for photocatalytic reaction. g-C3N4 was prepared by high temperature calcination using urea as a precurs

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12

Tsai, Yung-Han, and 蔡詠涵. "Photocatalytic Activity of Metal-Containing g-C3N4 via Different Sacrificial Reagents on Hydrogen Evolution." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/8263ee.

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碩士<br>國立臺北科技大學<br>分子科學與工程系有機高分子碩士班<br>107<br>In this dissertation, we use melamine as the precursor that was calcined to 600℃ to produce graphitic carbon nitride (g-C3N4) by a thermal condensation polymerization method. The product synthesized by this method has the advantages of acid and alkali resistance, structural stability and good photochemical properties. It was used for photocatalytic water splitting reaction, due to the band gap of g-C3N4 is around 2.7 eV, which cause it having a certain extent of photocatalytic activity even under the visible light condition. The processing parameter

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13

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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14

Lai, Yu-Sheng, and 賴育聖. "The formation of Synthesized InVO4 and (NH4)2V6O16/g-C3N4 for the Hydrogen Evolving Applications." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/vv4jfc.

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博士<br>國立中興大學<br>化學工程學系所<br>107<br>The water splitting to produce hydrogen through photocatalysis process is an energy renewable technology and hydrogen is a zero-emission clean energy. In this study, InVO4 has been chosen as the photocatalyst to decompose the water into hydrogen. By controlling the synthesis conditions such as the compositions, synthesized time, pH and hydrothermal temperature in order to form the suitable surface species and crystalline phase for the responsible activity of the water splitting efficiency. When the addition of ammonium to adjust the pH 5 with the constant hydr

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15

Chen, Yi-Hong, and 陳宜宏. "Fabrication of WO3/g-C3N4 Z-scheme Structure and Co-catalysts for Photocatalytic Hydrogen Evolution." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/nd39yy.

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16

Chen, Chin-Yuan, and 陳致元. "Prepared Cu/ZnO/g-C3N4 composite materials for photoreduction of CO2 into CO, CH3OH and CH4." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/h37f69.

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碩士<br>靜宜大學<br>應用化學系<br>107<br>In this study, a hydrothermal method was used to prepare a Cu/ZnO/g-C3N4 honeycomb material for photoreduction by using graphite phase carbonitride nitrogen ( g-C3N4 ) as a photocatalyst material. The CO2 and H2O are then converted to CO, CH3OH and CH4. The prepare catalyst was characterized by instrument of XRD, SEM, TEM, XPS, BET, UV-Vis and PL instruments. In this study, the photocatalyst was added with the appropriate amount of precious metals for high photocatalytic yield. A high yield of CH4 ( 40.7 μmol g-1 h-1), CO ( 65.1 μmol g-1 h-1) and CH3OH ( 92.5 mol

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17

I-TingChen and 陳俋廷. "High Pressure Photoreduction of CO2: g-C3N4/Bi2WO6/rGO prepared by a microwave-assisted-hydrothermal method." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/t7u47v.

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碩士<br>國立成功大學<br>環境工程學系<br>107<br>In recent years, the greenhouses gases (i.e., excessive CO2 emission) led to serious global climate change problems, e.g., greenhouse effect and extreme climate. Among various techniques for reduction of CO2 emissions, the photocatalytic conversion of CO2 into chemicals or fuels is considered one of the promising strategies to address this problem. Thus, it is important to explore a photocatalyst with stability, high efficiency, and low cost. In addition, considering most of the research about CO2 photoconversion was conducted at normal pressure, the effects of

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18

Wen-TingTang and 湯雯婷. "Microwave-assisted synthesis of g-C3N4/ Bi2WO6/ rGO for photocatalytic degradation of ibuprofen under visible light." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/mq43xf.

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19

KimYen, Duong Thi, та 楊氏金燕. "Enhanced photocatalytic performance of g-C3N4 through the addition of α-MoO3 nanobelts and TiO2 mesoporous beads". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/74u8a4.

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碩士<br>國立成功大學<br>材料科學及工程學系<br>106<br>Multi-component photocatalysts based on g-C3N4 was synthesized to enhance the photocatalytic performance of g-C3N4. Exfoliated g-C3N4 was fabricated by heating melamine at 550°C, followed by the use of hydrogen peroxide (H2O2) to exfoliate bulk g-C3N4. Mesoporous TiO2 beads were prepared using a two-step process. α-MoO3 nanobelts were made by the hydrothermal method. Two groups of binary-component photocatalysts of TiO2 mesoporous beads/exfoliated g-C3N4, and α-MoO3 nanobelts/ exfoliated g-C3N4 having various compositions were then made. Based on the perform

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20

Chen, Ya-Ju, and 陳雅如. "Synthesis of Pt/g-C3N4/SrTiO3 photocatalyst for photocatalytic hydrogen production through water splitting under sunlight irradiation." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/d53p8y.

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碩士<br>國立中興大學<br>環境工程學系所<br>106<br>This research aims to develop a solar light-responsive platinum/graphitic carbon nitride/strontium titanate (Pt/g-C3N4/SrTiO3) for photocatalytic hydrogen production. The effect of calcination temperature on the crystalline structure of g-C3N4 and the effects of Pt loading amount, type of sacrificial agent, concentration of sacrificial agent, and type of photocatalyst composition on charge separation were discussed in detail. The XRD analysis result revealed that when the calcination temperature was controlled in the range of 500-600 oC, the crystallinity of g

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21

Chu, Yi-Ching, and 朱怡親. "Photoelectrochemical Analysis of Multi-ion Doped Graphite Carbon Nitride (g-C3N4) and Its Application on Hydrogel Formation." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7crvvu.

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碩士<br>中原大學<br>化學工程研究所<br>107<br>Graphitic carbon nitride (g-C3N4) is a promising visible light-driven photocatalyst with a band gap energy of 2.70 eV. However, abundant surface defects and unwanted carbon or nitrogen vacancies may lead to high charge recombination that results in a decrease of photocatalytic activity. In this study, P and S were co-doped on oxygenated g-C3N4(PSOCN) using a thermal condensation method with different weight ratio of P and S (PxSyOCN, x, y =5,10,15). Photoelectrochemical properties including impedance spectroscopy, Mott-Schottky analysis, and photocurrent density

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22

Tan, Chung-En, and 譚仲恩. "Synthesis of Pt/g-C3N4/SrTiO3 Photocatalyst for Simultaneous Dye Decolorization and Hydrogen Production in Simulation Dye Wastewater." Thesis, 2019. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5087020%22.&searchmode=basic.

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碩士<br>國立中興大學<br>環境工程學系所<br>107<br>In this study, Pt/g-C3N4/SrTiO3 photocatalyst was applied to decolorize dye and produce hydrogen simultaneously. Firstly, the effect of calcination temperatures of g-C3N4 on dye decolorization efficiency was investigated. The optimal calcination temperatures of g-C3N4 was combined with commercial SrTiO3 in different ratio, and the composite with the best ratio was decided by activity test. Then the g-C3N4/SrTiO3 photocatalyst was coated with Pt metal, and the effect of different TEOA concentration on activity test, determining the optimal operating condition.

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23

Ho-Pan, Lin, and 林禾弁. "The Visible-Light-Driven Photocatalysts of The Magnetic and Mesoporous SrFeO3-x/g-C3N4 and BiOBr/PbBiO2Br Nano-Composites: Synthesis, Characterization, Photocatalytic Activity, and Degraded Mechanisms." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/61880728636873037308.

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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科學教育碩士班<br>103<br>The mixing and heating method and the hydrothermal method are applied to synthesizing two visible-light-driven (VLD) photocatalysts, SrFeO3-x/g-C3N4 and BiOBr/PbBiO2Br, respectively. X-ray diffractometer, Field Emission-Scanning Electron Microscopy-Energy Dispersive Spectroscopy, Field Emission-Transmission Electron Microscopy-Energy Dispersive Spectroscopy, Fourier Transform Infrared Spectroscopy, UV-vis diffuse reflectance spectra, Surface Area and Porosity Analyzer, and Ultraviolet Photoelectron Spectroscopy are utilized for distinguishing the sy

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