Morphology-Tailored Synthesis of Tungsten Trioxide (Hydrate) Thin Films and Their Photocatalytic Properties

被引：156

作者：

Jiao, Zhihui ^{[1
]}

Wang, Jinmin ^{[1
]}

Ke, Lin ^{[2
]}

Sun, Xiao Wei ^{[1
,3
]}

Demir, Hilmi Volkan ^{[1
,4
,5
,6
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

[2] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore

[3] Tianjin Univ, Coll Sci, Dept Appl Phys, Tianjin 300072, Peoples R China

[4] Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore

[5] Bilkent Univ, UNAM, Dept Phys, Dept Elect & Elect Engn, TR-06800 Ankara, Turkey

[6] Bilkent Univ, Natl Inst Mat Sci & Nanotechnol, TR-06800 Ankara, Turkey

来源：

ACS APPLIED MATERIALS & INTERFACES | 2011年 / 3卷 / 02期

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

tungsten trioxide; hydrothermal; capping agent; photocatalyst; water splitting; NANOROD ARRAYS; GAS SENSORS; WO3; OXIDE; PROGRESS; DEVICES; ENERGY; CELLS; WATER;

D O I：

10.1021/am100875z

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Tungsten trioxide hydrate (3WO(3)center dot H(2)O) films with different morphologies were directly grown on fluorine doped tin oxide (FTO) subsi:rate via a facile crystal-seed-assisted hydrothermal method. Scanning electron microscopy (SEM) analysis showed that 3WO(3)center dot H(2)O thin films composed of platelike, wedgelike, and sheetlike nanostructures could be selectively synthesized by adding Na(2)SO(4), (NH(4))(2)SO(4), and CH(3)COONH(4) as capping agents, respectively. X-ray diffraction (XRD) studies indicated that these films were of orthorhombic structure. The as-prepared thin films after dehydration showed obvious photcicatalytic activities. The best film grown using CH(3)COONH(4) as a capping agent generated anodic photocurrents of 1.16 mA/cm(2) fork oxidization of methanol and 0.5 mA/cm(2) for water splitting with the highest photoconversion efficiency of about 0.3% under simulated solar illumination.

引用

页码：229 / 236

页数：8

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