Photoelectrochemical analysis of band gap modulated TiO2 for photocatalytic water splitting

被引：6
|
作者：
Saraf, Shashank [1 ]
Giraldo, Manuel [1 ]
Paudel, Hari P. [2 ,3 ,4 ,5 ]
Sakthivel, Tamil S. [1 ]
Shepard, Cathrine [2 ]
Gupta, Ankur [1 ]
Leuenberger, Michael N. [2 ,3 ]
Seal, Sudipta [1 ,2 ]
机构：
[1] Univ Cent Florida, Adv Mat Proc & Anal Ctr, Mat Sci & Engn, Orlando, FL 32826 USA
[2] Univ Cent Florida, NanoSci Technol & Ctr, Orlando, FL 32826 USA
[3] Univ Cent Florida, Dept Phys, Orlando, FL 32826 USA
[4] Georgia State Univ, Ctr Nanoopt, Atlanta, GA 30302 USA
[5] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30302 USA
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 15期
基金：
美国国家科学基金会;
关键词：
Folic acid; Electron hole pair; Photoelectrode; Density functional theory; OXYGEN VACANCIES; HYDROGEN; FILMS;
D O I：
10.1016/j.ijhydene.2017.01.232
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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). (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：9938 / 9944
页数：7
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