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Title: Studies to Understand the Influence of Morphology on Semiconductor Electrolyte Interface in Photoelectrochemical Splitting of Water
Researcher: Asha, Kumari
Guide(s): Sahab Dass
Keywords: Chemistry
Chemistry Analytical
Physical Sciences
University: Dayalbagh Educational Institute
Completed Date: 2020
Abstract: Photoelectrochemical water splitting is an attractive strategy for sustainable hydrogen production as it utilizes earth abundant resources such as sunlight and water. It thus has the potential to produce a clean, environmental friendly and inexpensive fuel to meet the energy crisis of today s world. Since, Fujishima and Honda s photolytic experiment on TiO2, there has been a quest for an ideal semiconductor electrode which can produce hydrogen efficiently. Besides a semiconductor with right set of properties there are many more aspects viz. synthesis techniques, morphology of the nanoparticles, topography and roughness at the electrode surface, reactions involving charge transfer, different processes taking place at the electrode/electrolyte interface, electrolyte, pH, etc. which have a direct bearing on the performance of a photoelectrochemical cell. newlineSemiconductor electrode/electrolyte interface, a site where electrochemical reactions take place is still an unexplored area in PEC research which requires thorough understanding. Interfacial processes are greatly influenced by the morphological and topographical factors which in turn influence the PEC response of photoelectrodes. Optimum surface parameters and appropriate morphology facilitate water oxidation reaction by aiding the electron-hole pair separation and transport at the interface. newlineThe thesis aims to determine and analyze various electrode surface roughness parameters affecting PEC performance. Thin films of ZnO and Fe2O3 have been prepared using different chemical routes to synthesize nanoparticles of varying morphology. Power Spectral Density analysis has been used apparently for the first time in PEC research to calculate minute surface roughness parameters viz. fractal dimension, lower and upper cut off length scales of electrodes. Morphology of the nanoparticles at the electrode surface has been studied using FE-SEM and AFM techniques. Surface parameters were correlated with the results obtained from photoelectrochemical analysis. The study hence provides a tool for identification and preparation of an ideal photoelectrode with appropriate morphology and is expected to cut down the expense and effort required in hydrogen generation. newline newline
Appears in Departments:Department of Chemistry

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01_title.pdfAttached File41.46 kBAdobe PDFView/Open
02_certificate.pdf216.71 kBAdobe PDFView/Open
03_declaration.pdf106.6 kBAdobe PDFView/Open
04_abstract.pdf79.19 kBAdobe PDFView/Open
05_acknowledgement.pdf41.52 kBAdobe PDFView/Open
06_contents.pdf180.13 kBAdobe PDFView/Open
07_list_of_tables.pdf34.83 kBAdobe PDFView/Open
08_list_of_figures.pdf130.45 kBAdobe PDFView/Open
09_abbreviations.pdf175.02 kBAdobe PDFView/Open
10_chapter1.pdf1.14 MBAdobe PDFView/Open
11_chapter2.pdf251.83 kBAdobe PDFView/Open
12_chapter3.pdf1.14 MBAdobe PDFView/Open
13_chapter4.pdf6.57 MBAdobe PDFView/Open
14_conclusion.pdf273.63 kBAdobe PDFView/Open
15_references.pdf191.96 kBAdobe PDFView/Open
16_appendix.pdf255.8 kBAdobe PDFView/Open
17_summary.pdf162.09 kBAdobe PDFView/Open
80_recommendation.pdf434.27 kBAdobe PDFView/Open

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