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Dissertations / Theses on the topic 'Light degradation'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Dinh, Vincent Vinh. "Degradation in organic light emitting devices /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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2

Delacour, Quentin. "Light-induced protein degradation : a chemical biology approach." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066347/document.

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La régulation de la protéolyse est un outil efficace pour le contrôle de la fonction d'une protéine dans des cellules. Nous présentons dans ce travail une stratégie générique permettant d'activer la protéolyse de façon conditionnelle par la lumière, améliorant ainsi la résolution spatio-temporelle. Notre approche repose sur un système de dégradation inductible par l'auxine (AID), mis au point en transposant des composants de la voie de dégradation contrôlée par l'auxine existant chez les plantes dans des cellules de mammifères. Nous présentons une version optimisée du système AID qui a permis

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3

Nærland, Tine Uberg. "Characterization of light induced degradation in crystalline silicon." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for materialteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23576.

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Light induced degradation is an unfortunate characteristic of a very commonly used silicon material for solar cells: boron-doped Czochralski silicon. The degradation is attributed to a recombination center that is activated by excess charge carriers, i.e. electrons, and the energy conversion efficiency of the affected cells is severely reduced. The phenomenon has been known since the early 1970's but the fundamental mechanism is still a debated topic. The main focus of this thesis has been to study the role of the excess carrier concentration on the B-O related defect center generation and a n

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4

Li, Tong. "Influence of stress on photo-degradation of polymers." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283648.

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5

Hundal, Torill. "Light stress and photosystem II inactivation, degradation and protection /." Stockholm : Dept. of Biochemistry, Arrhenius Laboratories for Natural Sciences, Stockholm University, 1992. http://catalog.hathitrust.org/api/volumes/oclc/28171676.html.

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6

Niu, Quan [Verfasser]. "Electrical degradation of polymer light-emitting diodes / Quan Niu." Mainz : Universitätsbibliothek Mainz, 2017. http://d-nb.info/1140936182/34.

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7

Sigcau, Z. "Light induced degradation in hydrogenated amorphous silicon (a-Si:H)." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/6552.

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Includes bibliographical references (leaves 73-77).<br>Light induced degradation in the microstructure and optical properties of a series of hydrogenated amorphous silicon (a-Si:H) layers, deposited by hot wire chemical vapour deposition system (HWCVD) on glass and silicon substrates at different temperatures ranging from 250Light induced degradation in the microstructure and optical properties of a series of hydrogenated amorphous silicon (a-Si:H) layers, deposited by hot wire chemical vapour deposition system (HWCVD) on glass and silicon substrates at different temperatures ranging from 250°

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8

Miao, Jing. "Simulated solar light assisted photocatalytic degradation of organic matters." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1638.

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The increasing human population combined with overexploitation of water resources for domestic purposes, industry, and irrigation, has resulted in a shortage of freshwater supply in many parts of the world. Advanced oxidation processes (AOP) have been applied widely to water and wastewater treatment, especially heterogeneous and homogeneous photocatalysis. The photocatalytic reactions take place under ambient operating conditions, but the photoactivity is usually constrained by the narrow wavelength spectrum for photonic activation of catalysts. The higher-end of ultraviolet (UV) spectrum requ

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9

Bhattacharjee, Linkon. "DEGRADATION OF 1,4-DIOXANE USING METALLIC NANOPARTICLES UNDER VISIBLE LIGHT." OpenSIUC, 2020. https://opensiuc.lib.siu.edu/theses/2655.

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1,4-dioxane is an emerging contaminant and fully miscible organic compound which has been found extensively in wastewater effluent. Conventional water treatment technologies like carbon adsorption, and air stripping are inefficient in removing this extremely mobile and persistent contaminant from water. In this study, different types of metallic nanoparticles, e.g., nanoscale zero-valent iron (nZVI), γFe2O3, and Fe(III)-doped TiO2 were used to investigate the removal of 1,4-dioxane under visible light. These nanoparticles were characterized with scanning electron microscope (SEM), transmission

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10

Mong-The, Yen Virginie. "Rôle du carbone et de l’oxygène sur les phénomènes de dégradation dans le silicium destiné aux applications photovoltaïques." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4368.

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La dégradation induite par éclairement (Light Induced Degradation : LID), s'exprimant par la perte de qualités électriques, est devenu un problème récurrent dans les modules photovoltaïques de silicium de qualité métallurgique (compensé en dopants). Compte tenu des nombreuses impuretés présentes dans ce matériau, la compréhension des mécanismes mis en jeu est très complexe et reste incomplète. Pour cette raison, les seuls mécanismes identifiés à ce jour sont liées à l'action de complexes BO2i. Les travaux réalisés durant cette thèse sur différentes qualités de plaquettes de silicium de type p,

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11

Luo, Shyh-Chyang. "Behavior of light-emitting polymers film formation, optical properties, and degradation /." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011397.

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12

Pinos, Andrea. "Optical properties and degradation of deep ultraviolet AIGaN-based light-emitting diodes." Doctoral thesis, KTH, Fotonik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37917.

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13

Chander, Nathan. "Stability and degradation mechanisms of blue light-emitting organic semiconductors and devices." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/45391.

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There has been a significant interest in polymer light-emitting diodes (PLEDs) due to their potential applications in efficient displays and large area light sources at low cost. In comparison to their red and green counterparts, the relatively poor operational stability of blue PLEDs is the biggest challenge faced in the commercialisation of PLED devices. This thesis is concerned with the stability issues of blue light-emitting fluorene-based conjugated polymers and small molecules towards highly efficient and longer lived blue PLEDs by elucidating underlying degradation mechanisms. Poly(9,9-

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14

Buck, Michael. "Modelling of the late phase of core degradation in light water reactors." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-33311.

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15

THALLURI, SITARAMANJANEYA MOULI. "Design of Visible-light driven catalysts for water oxidation and VOC degradation." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2588775.

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The PhD thesis involves one or more articles that are either published,submitted or in the process of manuscript preparation. These all chapters are eloborated in context to the understandings and advancements involved during the PhD period. The whole thesis involves insights about synthesis and characterization of BiVO4 in the form of powder as well as thin films. It also describes the ability of BiVO4 powders and thin films in water splitting and volatile organic compound degradation.

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16

Guzel, Aylin. "Photo-oxidative Degradation Of Abs Copolymer." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12610895/index.pdf.

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ABSTRACT PHOTO-OXIDATIVE DEGRADATION OF ABS COPOLYMER G&uuml<br>zel, Aylin M.S., Department of Polymer Science and Technology Supervisor: Prof. Dr. Teoman Tin&ccedil<br>er Co-Supervisor: Prof. Dr. Cevdet Kaynak September 2009, 55 pages Acrylonitrile-butadiene-styrene (ABS) polymer is one of the most popular copolymer having an elastomeric butadiene phase dispersed in rigid amorphous styrene and semi-crystalline acrylonitrile. Due to double bonds in the polybutadiene phase, ABS copolymers are very sensitive to photo-oxidative degradation. Photo-oxidation of butadiene rubber ph

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17

Gao, Yong. "A Degradation-based Burn-in Optimization for Light Display Devices with Two-phase Degradation Patterns considering Warranty Durations and Measurement Errors." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1509109739168013.

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18

Aziz, Hany M. "Intrinsic degradation mechanism in Tris(8-hydroxyquinolato) aluminum-based organic light emitting devices /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0035/NQ66192.pdf.

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19

Canciani, Giacomo Edi. "Beyond the light : a study on the nanophotocatalytic degradation of gas-phase contaminants." Thesis, University of Sussex, 2016. http://sro.sussex.ac.uk/id/eprint/65592/.

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20

ROMMOZZI, Elena. "Environmental Remediation by Light Driven Advanced Oxidation Processes: Pollutant Degradation and Bacterial Disinfection." Doctoral thesis, Università degli Studi di Camerino, 2019. http://hdl.handle.net/11581/428480.

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This PhD thesis in Chemical Science started in November 2015 at the School of Advanced Studies of University of Camerino. The research activity described in this PhD thesis was carried out at University of Camerino in the School of Science and Technology (Dr. Rita Giovannetti’s Research Group) and at École Polytechnique Fédérale de Lausanne in the Institut des Sciences et Ingénierie Chimiques (Prof. César Pulgarin’s Research Group). In this PhD thesis, after a “GENERAL INTRODUCTION” about the aim of the PhD project, are reported an INTRODUCTION regarding environmental and water pollution and

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21

GADHI, TANVEER AHMED. "Design of Visible Light Driven Bismuth based Catalysts for Degradation of Organic Pollutants." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2702932.

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This Ph.D. thesis deals with the synthesis, immobilization of bismuth-based nanostructures and their photocatalytic evaluation for degradation of organic pollutants mainly dyes, with the aim to optimize synthesis and photo-evaluation conditions by focusing the practical application of heterogeneous photocatalysis. Initially, various bismuth based single structures α-Bi2O3, Bi5O7NO3 and heterostructures α/β-Bi2O3, β-Bi2O3/Bi5O7NO3 were synthesized by a simple and scalable route i.e. thermal decomposition of precursor salt. Properties such as crystallinity, composition, morphology and optical pa

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22

Chen, Xi. "Noble metal photocatalysts under visible light and UV light irradiation." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/47008/1/Xi_Chen_Thesis.pdf.

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One of the greatest challenges for the study of photocatalysts is to devise new catalysts that possess high activity under visible light illumination. This would allow the use of an abundant and green energy source, sunlight, to drive chemical reactions. Gold nanoparticles strongly absorb both visible light and UV light. It is therefore possible to drive chemical reactions utilising a significant fraction of full sunlight spectrum. Here we prepared gold nanoparticles supported on various oxide powders, and reported a new finding that gold nanoparticles on oxide supports exhibit significant act

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23

Wu, Meixian. "Light scattering on worn windscreens : development of technique for quantitative measurement of visibility degradation." Thesis, KTH, Industriell produktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-41275.

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The wear of the windscreens as one important traffic safety problem has been observed in many studies. Transmission loss of windscreen could play an important role in a person‟s possibilities to detect objects on the road. It has been estimated that up to 90% of the information used by drivers to drive their cars is visual. When driving with a worn windscreen, the risk of dazzling increases. It can lead to the consequence that the driver does not discover objects or people in the driving environment.The goal with this thesis is to propose a method for quantitative measurement of the visibility

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Wu, Meixian. "Light scattering in worn windscreens – development of technique for quantitative measurement of visibility degradation." Thesis, KTH, Industriell produktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121768.

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The wear of the windscreens as one important traffic safety problem has been observed in many studies. Transmission loss of windscreen could play an important role in a person‟s possibilities to detect objects on the road. It has been estimated that up to 90% of the information used by drivers to drive their cars is visual. When driving with a worn windscreen, the risk of dazzling increases. It can lead to the consequence that the driver does not discover objects or people in the driving environment. The goal with this thesis is to propose a method for quantitative measurement of the visibilit

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25

Zu, Meng. "TiO2-based Photoelectrocatalysis Technology for Degradation and Detection of Organics in Wastewater." Thesis, Griffith University, 2021. http://hdl.handle.net/10072/406505.

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With industrialization rapidly progressing in recent decades, great amounts of refractory organic pollutants are found in water bodies, which severely jeopardizes ecosystem health. Monitoring the organic compounds in water bodies and removing organic pollutants from wastewater is essential for ameliorating threats to aquatic life and human health. Photocatalytic (PC) and photoelectrocatalytic (PEC) degradation and detection of organic pollutants in wastewater are promising strategies for fulfilling these goals sustainably, since PC and PEC technologies can take advantage of solar energy, which

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26

Adenuga, Dorcas Oluyemisi. "Facile synthesis of Ag/AgCI/BiOCI composite Z-scheme photocatalyst for visible-light-driven pollutant removal." Diss., University of Pretoria, 2019. http://hdl.handle.net/2263/79177.

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Degradation of organic contaminants in wastewaters emanating from industrial processing plants could render the water streams reusable for the purpose of reducing water consumption while protecting the environment from harmful pollutants. Organic pollutants can be removed from water using biological processes that mineralise the organics to H2O and CO2. However, mineralisation by biological processes take a long time and in many cases, total mineralisation is impossible to achieve. Alternatively, organics can be completely degraded and mineralised rapidly using chemical and/or photocatalytic a

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27

Schenk, Tobias [Verfasser]. "Investigation of light-induced SPA2 degradation and COP1-SPA inactivation in Arabidopsis thaliana / Tobias Schenk." München : Verlag Dr. Hut, 2019. http://d-nb.info/1196414637/34.

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28

Grasberger, Christopher B. "The Study of the Forward-Voltage to Junction-Temperature Coefficient Degradation in Light-Emitting Diodes." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/359.

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Light-emitting diodes (LEDs) have recently become exceedingly popular in general lighting. As their popularity grows, the demand of more complex and more powerful systems grows as well. While optical characteristics are a crucial component of any lighting product, the main selling point of an LED is their long life and reliability. Unfortunately, the lifetime and reliability of a LED are heavily dependent on the junction temperature of the LED. Thermal management for LEDs has become an important field study for LEDs. Unfortunately, as the LEDs grow smaller and more integrated, it becomes

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29

Buck, Michael [Verfasser]. "Modelling of the late phase of core degradation in light water reactors / vorgelegt von Michael Buck." Stuttgart : IKE, 2007. http://d-nb.info/997050047/34.

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30

Phan, Thi To Nga. "Synthesis and evaluation of LaFeO3-based catalysts for photo-Fenton degradation of dyes under visible light." Thesis, Phan, Thi To Nga (2019) Synthesis and evaluation of LaFeO3-based catalysts for photo-Fenton degradation of dyes under visible light. PhD thesis, Murdoch University, 2019. https://researchrepository.murdoch.edu.au/id/eprint/46296/.

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Synthetic dyes are widely used in many industries, including textile production, plastic manufacturing, and food processing. Currently, approximately 30000 – 150000 tons of dyes are being discharged into waterways, posing a threat to human health as well as the aquatic environment. Most of these dyes can persist in aquatic systems for a long period due to their resistance to bacterial and chemical attacks. One way to deal with this issue appears to be the photo-Fenton oxidation process, which is efficient in catalyzing the decomposition of recalcitrant organic dyes in water. Recently, pero

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31

Bredemeier, Dennis [Verfasser]. "Light and elevated Temperature Induced Degradation (LeTID) of the carrier lifetime in multicrystalline silicon / Dennis Bredemeier." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2020. http://d-nb.info/1211083705/34.

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32

Li, Haitao. "Synthesis of Titanium Dioxide Photocatalyst with the Aid of Supercritical Fluids." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4912.

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Titanium Dioxide (TiO2) emerged as one of the most popular photocatalysts since 1970's. However, its photocatalytic activity requires UV irradiation due to its large band gap unless further functionalization or modifications are performed. Furthermore, recovery issue has always been a major drawback, if the more effective form nano particles are utilized. The key objectives of this research were synthesizing new TiO2 based photocatalyst systems that are effective with both the UV and the visible light while utilizing novel superior environmentally friendly techniques enabling development of na

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33

Upadhyaya, Ashraya. "Nitrogen Doped Titanium Dioxide in the Photocatalytic Degradation of Methylene Blue." ScholarWorks@UNO, 2018. https://scholarworks.uno.edu/honors_theses/120.

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Titanium dioxide(TiO2) is a stable, effective and well-known photocatalyst for degradation of pollutants. However, its practical applications are limited due to the need for energy higher than 3.2 eV, or a wavelength lower than 390 nm (high frequency waves, ultraviolet and above) hindering its ability to effectively work in the visible light region (about 400 nm to 700 nm). Nitrogen-doped TiO2 (N-TiO2) has garnered some attention as a photocatalyst as it appears to work even in the visible light region. This could allow the utilization of a larger part of the solar spectrum. This thesis presen

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34

Meerheim, Rico. "Quanteneffizienz und Langzeitstabilität monochromer organischer Leuchtdioden." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-24182.

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Den Fokus dieser Arbeit bildet die Untersuchung und die konzeptionelle Verbesserung der wichtigsten Eigenschaften organischer Leuchtdioden (OLED) – die Lebensdauer und die Quantenausbeute, welche sich durch die interne und externe Quanteneffizienz kategorisieren lässt. Es werden monochrome pin- Strukturen betrachtet, welche die Basis für Displays und weiße Multifarben- OLEDs darstellen. Die Auswirkung der Ladungsbalance auf die interne Quanteneffizienz wird untersucht. Dabei finden Triplettemitter Verwendung, da diese aus spinstatistischen Gründen viermal effizienter als fluoreszente S

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35

Wölzl, Florian. "Degradation Mechanisms in Small-Molecule Organic Electronic Devices." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199369.

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Over the last decades organic light-emitting diodes (OLEDs) and organic solar cells (OSCs) have gained considerable attention as efficient, flexible, lightweight, and potentially low-cost technology for lighting and display applications or as a renewable energy source, respectively. However, achieving long-term stability remains challenging. Revealing and understanding aging processes is therefore of great interest. This work presents fundamental investigations to understand and circumvent organic device degradation. In the first part, single materials used in organic devices were investigate

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Schmidt, Tobias D. [Verfasser], and Wolfgang [Akademischer Betreuer] Brütting. "Photophysics of organic light-emitting diodes: Device efficiency and degradation processes / Tobias D. Schmidt. Betreuer: Wolfgang Brütting." Augsburg : Universität Augsburg, 2013. http://d-nb.info/107770304X/34.

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Tian, Yuehui [Verfasser], and Georg [Gutachter] Nagel. "Characterization of novel rhodopsins with light-regulated cGMP production or cGMP degradation / Yuehui Tian ; Gutachter: Georg Nagel." Würzburg : Universität Würzburg, 2019. http://d-nb.info/1194836224/34.

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Ntiribinyange, Mary Solange. "Degradation of textile wastewater using ultra-small Β-Feooh/Tio2 heterojunction structure as a visible light photocatalyst". Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2467.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2016.<br>The worldwide high demand for drinking water has led to the development of numerous advanced wastewater treatment processes. Photocatalysis has recently become an alternative and attractive technique for green energy production and environmental remediation. It is also a wastewater treatment technique which is considered reliable and is expected to provide a sustainable solution to the scarcity of clean water. In particular, heterogeneous photocatalysts based on TiO2 nanoparticles and sunlight have be

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Wang, Jing. "Development of Graphitic Carbon Nitride based Semiconductor Photocatalysts for Organic Pollutant Degradation." Doctoral thesis, KTH, Tillämpad processmetallurgi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173216.

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As a potential solution to the global energy and environmental pollution, design and synthesis of artificial photocatalysts with high activities have attracted increasing scientific interests worldwide. In recent years, the graphitic carbon nitride (g-C3N4) has shown new possible applications in the photocatalytic field due to its unique properties. However, the photocatalytic efficiency of the pristine g-C3N4 is greatly limited by the high recombination rate of the photo-induced electron-hole pairs. In this thesis, the aim is to design and fabricate efficient g-C3N4 based photocatalysts with

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Lekander, Maria, Troncoso Jonathan Fagerström, Abdelrahman Idjbara, Ida Karlsson, Teresia Lindgren, and Simon Ström. "A kinetic study of the degradation of hyaluronic acid at high concentrations of sodium hydroxide." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-301379.

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During production of different Hyaluronic acid (HA) products Galderma use a high concentration of NaOH in the crosslinking process of HA. HA’s degradation kinetics are widely unknown at higher pH’s and is interesting for the future of product development of HA. Static Light Scattering (SLS) was used to determine the weight average molecular weight (MW ) of samples with four different NaOH concentrations, four temperatures, three reaction times and one t0 sample. The results were evaluated in forms of Arrhenius-graphs for different NaOH concentrations, the activation energy (EA ) with respect

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Berggren, Rickard. "Cellulose degradation in pulp fibers studied as changes in molar mass distributions." Doctoral thesis, KTH, Fibre and Polymer Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3499.

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<p>In this thesis, size-exclusion chromatography (SEC) of woodpolymers dissolved in lithium chloride/N,N-dimethylacetamide(LiCl/DMAc) has been used to characterize the molar massdistributions (MMD) of wood polymers in pulp fibers afterchemical degradation.</p><p>Characterization of birch kraft pulps subjected to ozonedegradation and acid hydrolysis, respectively, rendereddifferent changes in the MMD. Ozone degradation resulted inlarge redistributions of the original MMD, observed as thedevelopment of a distinct fraction of cellulose withintermediate molar mass. Acid hydrolysis resulted in mino

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Lund, Gustav. "Light and enhanced Temperture Induced Degradation, LeTID." Thesis, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-74680.

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Lin, You Ting, and 林祐霆. "Plausible degradation mechanisms in organic light-emitting diodes." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/pgr3m8.

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Yu, Chih Wen, and 尤志文. "Sonophotocatalytic Degradation of Phenol under Visible Light Irradation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/14398543139690459776.

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碩士<br>大同大學<br>化學工程學系(所)<br>98<br>The sonophotocatalytic degradation of phenol under visible light irradiation combined with ultrasound was carried out in a glass reactor. 0.5%ZnFe2O4/TiO2-GAC was employed as the lower band gap photocatalysts which were obtained by sol-gel process and characterized by spectroscopic X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray microanalyses (SEM-EDX) and Brunauer-Emmett-Teller sorptometer (BET). Sonophotocatalytic degradation of phenol has synergistic effect for phenol degradation in comparison with photocatalytic reaction.

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Chen, Ching-Cheng, and 陳慶成. "Heterostructured Visible Light Magnetic Photocatalysts on Dye Degradation." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/42643209940758569776.

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博士<br>國立東華大學<br>材料科學與工程學系<br>104<br>The work focuses on the two kinds of research direction of the dye degradation. First, we synthesized iron-doped TiO2 photocatalysts. The aim of the work is to study the effects of oxygen vacancy and surface hydroxyl group density on the photocatalytic activity of Fe3+-doped TiO2, and to investigate how the titanium dioxide doped with different concentration of the Fe3+ influenced their physical and chemical characterizations. The photocatalysts were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), electron spin resonance (ESR), X-

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Su, Yen-Fu, and 蘇彥輔. "Design of Thermal Performance and Light Degradation Test for High-power Light Emitting Diode." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/45409685891469495656.

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Lin, Mon-Chien, and 林孟謙. "Effect of light-inducing degradation on curcumin binding to membrane." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/xs672f.

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碩士<br>國立中央大學<br>物理研究所<br>96<br>This thesis is to study the binding of curcumin to unsaturated lipid membrane, and the effect of light-inducing degradation on curcumin binding to membrane. We use isothermal titration calorimetry (ITC) to measure the binding free energy, the binding enthalpy and the binding entropy for understanding the thermodynamics of binding process. The result reveals that, the curcumin binding to the unsaturated lipid membrane is an exothermic reaction, and without any external force , it reacts spontaneously. Moreover, we found that the curcumin''s result of hydrolysis

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Wang, Yu-Chen, and 王彧宸. "Photocatalytic degradation of polyethylene glycol using visible-light driven photocatalysts." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/83798161293376793629.

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碩士<br>崑山科技大學<br>環境工程研究所<br>102<br>Large amounts of synthetic polymer are used for various industrial and/or general applications. A significant proportion appears in the form of waste and is discarded into the environment. Most of them are recalcitrant to biodegradation and conventional chemical oxidation using oxidants. In this project, the decomposition of various PEG (e.g., PEG 2000, PEG 4000, PEG 6000, and PEG 20000) by means of visible-light photocatalytic degradation has been studied. 　　Photocatalytic nanocrystalline neat TiO2 powders were prepared from alkoxide solutions via the sol-ge

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TANG, HORNG-SHYANG, and 湯鴻祥. "PHOTOCATALYTIC DEGRADATION OF 2,4-DICHLOROPHENOL IN WATER USING SOLAR LIGHT." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/08339585660121228475.

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碩士<br>國立臺灣大學<br>環境工程學研究所<br>85<br>This research used solar irradiation as the UV source to degrade 2,4-dichlorophenol in water. The solar photocatalytic reactor was constructed by packing four types of supported catalysts (1 wt% TiO2/glass beads, 1 wt% TiO2/silica gel, 1 wt% Pt/TiO2/silica gel, and 1 wt% Pt/TiO2/glass beads) into quartz tubes. To investigate the influence on the destruction rates of 2,4-dichlorophenol (2,4-DCP), the following factors were examined: (a) supported catalyst ty

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Neves, Ana Cristina Rocha da Silva Cortez das. "Photochemical degradation of triclosan: a comparison between different light sources." Master's thesis, 2014. http://hdl.handle.net/10362/14670.

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New emerging contaminants could represent a danger to the environment and Humanity with repercussions not yet known. One of the major worldwide pharmaceutical and personal care productions are antimicrobials products, triclosan, is an antimicrobial agent present in most products. Despite the high removal rate of triclosan present in wastewater treatments, triclosan levels are on the rise in the environment through disposal of wastewater effluent and use of sewage sludge in land application. Regulated in the EC/1272/2008 (annex VI, table 3.1), this compound is considered very toxic to aquatic l

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