Photoelectrochemical performances of TiO2 nanotube arrays hydrothermally treated in sulfide

被引：10

作者：

Wang, Jinwen ^{[1
]}

Xu, Guangqing ^{[1
]}

Zhang, Xu ^{[1
]}

Zhai, Pengbo ^{[1
]}

Lv, Jun ^{[1
]}

Wang, Dongmei ^{[1
]}

Zheng, Zhixiang ^{[1
]}

Wu, Yucheng ^{[1
,2
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

[2] Hefei Univ Technol, Anhui Prov Key Lab Adv Funct Mat & Devices, Hefei 230009, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2016年 / 363卷

关键词：

TiO2 nanotube arrays; Sulfide treatment; Photoelectrochemical performances; Mesoporous structure; S-DOPED TIO2; SOLAR-CELLS; WATER; OXIDATION; TITANIUM;

D O I：

10.1016/j.apsusc.2015.12.038

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：

Anatase TiO2 nanotube arrays were hydrothermally treated in Na2S solution, and the photoelectrochemical performances were systematically studied. Morphology, structure, elemental component and photoelectrochemical performances of TiO2 were characterized by scanning electron microscope, high resolution transmission electron microscope, X-ray diffractometer, X-ray photoelectron spectrometer and electrochemical workstation, respectively. The influence of the sulfide treatment on the photoelectrochemical performance is discussed in detail by measuring cyclic voltammogram, chornoamperogram and chemical impedance spectrum of treated TiO2 nanotube arrays in different conditions. TiO2 nanotube arrays sulfide treated in 30 mM Na2S solution at 135 degrees C possess the highest photocurrent of 289 mu A, which is 3.3 times that of untreated sample. High optical absorption, large electrochemical active surface area and rapid electron transfer rate due to the mesoporous structure rather than sulfide dropping play key roles in enhancing the photoelectrochemical activity of the TiO2 nanotube arrays. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：644 / 650

页数：7

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