Photoelectric properties of cystine-modified nano-TiO2 with visible-light response

被引：5

作者：

Cheng, Xiu-Wen ^{[1
,2
,3
]}

Yu, Xiu-Juan ^{[1
]}

Xing, Zipeng ^{[1
]}

机构：

[1] Heilongjiang Univ, Dept Environm Sci & Engn, Harbin 150080, Heilongjiang Pr, Peoples R China

[2] Harbin Inst Technol, State Key Lab Urban Water Resources & Environm, Harbin 150090, Peoples R China

[3] Harbin Inst Technol, Sch Municipal & Environm Engn, Dept Environm Sci & Engn, Harbin 150090, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2012年 / 523卷

基金：

中国国家自然科学基金;

关键词：

Cystine; TiO2; Visible-light; Photoelectric properties; DOPED TIO2 PHOTOCATALYSTS; SEMICONDUCTOR; NANOPARTICLES; OXIDATION; FILM;

D O I：

10.1016/j.jallcom.2012.01.132

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：

Visible light responsible TiO2 nano-particles (TiO2 NPs) were prepared through sol-gel method using tetrabutyl titanate and biomolecule cystine as raw materials. The resulting materials were characterized by X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS), surface photovoltage spectroscopy (SPS) and electric field induced surface photovoltage spectroscopy (EFISPS). The XRD results showed that the addition of cystine could effectively retard the phase transformation of TiO2 from anatase to rutile and the growth of crystallite sizes. DRS results indicated that the light absorption edge of TiO2 was significantly red-shifted to visible region with the addition of biomolecule cystine. SPS results exhibited that the separation efficiency of the photoinduced charge carriers of TiO2 were effectively improved. In addition, EFISPS indicated that TiO2 nano-particles modification with biomolecule cystine were still n-type semiconductor. Crown Copyright (C) 2012 Published by Elsevier B. V. All rights reserved.

引用

页码：22 / 24

页数：3

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