Effects of bismuth addition and photo-deposition of platinum on (surface) composition, morphology and visible light photocatalytic activity of sol-gel derived TiO2

被引：20

作者：

Yi, Wentao ^{[1
,2
]}

Yan, Chunyan ^{[1
,2
]}

Hamdy, Mohamed S. ^{[1
,3
]}

Baltrusaitis, Jonas ^{[1
]}

Mul, Guido ^{[1
]}

机构：

[1] Univ Twente, Fac Sci & Technol, MESA Inst Nanotechnol, Photocatalyt Synth Grp, NL-7500 AE Enschede, Netherlands

[2] Zaozhuang Univ, Coll Chem Chem Engn & Mat Sci, Zaozhuang 277160, Peoples R China

[3] Helwan Univ, Fac Sci, Dept Chem, Cairo, Egypt

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2014年 / 154卷

关键词：

Platinum; Bismuth; Anatase; TiO2; Photocatalysis; Water treatment; CO-DOPED TIO2; HYDROTHERMAL SYNTHESIS; DEGRADATION; DIOXIDE; OXIDE;

D O I：

10.1016/j.apcatb.2014.01.055

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：

Several remarkable observations regarding structure, (surface) composition and visible light induced photocatalytic activity of Bi-promoted Anatase photocatalysts are reported. First, XPS characterization data show that compositions of mixed Bi-Ti-oxide phases obtained by hydrothermal treatment at 180 degrees C of aqueous solutions of ethanol, titanium n-butoxide, and bismuth nitrate, are surface enriched with a specific fraction of metallic-like bismuth. Second, the formation of highly dispersed nanoparticles of platinum on these composites by photo-deposition is accompanied by significant morphological changes. Third, the platinum functionalized, bismuth-promoted Anatase composites exhibit extraordinary photocatalytic activity in the photocatalytic degradation of organic compounds (acid orange 7 and salicylic acid, respectively) upon illumination at 447 nm, higher than observed for P25 upon UV illumination in similar reactor configuration. An optimized Pt-Bi-Ti-O-x composite consists of 1 wt% Pt and 5 wt% Bi. The high activity of the composite is discussed on the basis of the crystalline morphology and surface composition. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：153 / 160

页数：8

共 38 条

[1] Efficient photocatalytic hydrogen generation by Pt modified TiO2 nanotubes fabricated by rapid breakdown anodization [J].