A ternary Ag/TiO2/CNT photoanode for efficient photoelectrochemical water splitting under visible light irradiation

被引：88
作者：
Chaudhary, Deepti [1 ]
Singh, Simrjit [1 ]
Vankar, V. D. [1 ]
Khare, Neeraj [1 ]
机构：
[1] Indian Inst Technol Delhi, Dept Phys, New Delhi 110016, India
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 12期
关键词：
Carbon nanotubes; TiO2; Nanocomposite; Photoelectrochemical water splitting; TIO2 NANOTUBE ARRAYS; HYDROGEN-PRODUCTION; CARBON NANOTUBES; PHOTOCATALYTIC DEGRADATION; GRAPHENE OXIDE; COMPOSITE; SOLAR; AG; NANOCOMPOSITE; NANOPARTICLE;
D O I：
10.1016/j.ijhydene.2016.12.036
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：
A ternary Ag/TiO2/CNT photoanode was prepared by grafting Ag nanoparticles on the surface of as-synthesized TiO2/CNT nanocomposite for the photoelectrochemical (PEC) water splitting under visible light irradiance. The ternary composite photoanode was observed to generate four times higher photocurrent density compared to binary TiO2/CNT nanocomposite under visible light irradiance. The Ag nanoparticles on the surface of nanocomposite act as a surface plasmon resonance (SPR) photosensitizer under visible light. The enhanced photocurrent density of Ag/TiO2/CNT ternary photoanode is attributed to the increased light absorption in the visible region, decrease in band-bending and effective interfacial electron transfer due to the synergetic effect of Ag nanoparticles and CNTs. The enhanced charge transfer within the Ag/TiO2/CNT was also confirmed by the electrochemical impedance spectroscopy. This work demonstrates a feasible route to improve the PEC performance of TiO2 towards water splitting under sunlight irradiation. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：7826 / 7835
页数：10
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