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Photoelectrochemical analysis of band gap modulated TiO2 for photocatalytic water splitting |
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| Authors: | Shashank Saraf Manuel Giraldo Hari P. Paudel Tamil S. Sakthivel Cathrine Shepard Ankur Gupta Michael N. Leuenberger Sudipta Seal |
| Affiliation: | 1. Advanced Materials Processing and Analysis Center, Materials Science and Engineering, University of Central Florida, Orlando, FL 32826, USA;2. NanoScience Technology and Center, University of Central Florida, Orlando, FL 32826, USA;3. Department of Physics, University of Central Florida, Orlando, FL 32826, USA |
| Abstract: | In this study the photocatalysis efficiency of titania (TiO2) is increased by conjugating it with folic acid (FA) molecules through a silane linker (APTMS) layer. Electrochemical testing demonstrated higher negative open circuit potential (OCP) in surface engineered TiO2 as compared to TiO2 indicating higher Schottky barrier leading to suppressed electron–hole pair recombination. The photocurrent density under no bias conditions demonstrated 55% increase in modified titania due to lower band gap and suppressed electron hole pair recombination. The mechanism behind higher photocatalytic properties of surface engineered TiO2 was derived using density functional theory (DFT). |
| Keywords: | Folic acid Electron hole pair Photoelectrode Density functional theory |
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