SiO2/TiO2 double-shell hollow particles: Fabrication and UV-Vis spectrum characterization

被引：20

作者：

Chen, Wanghui ^{[1
]}

Takai, Chika ^{[1
]}

Khosroshahi, Hadi Razavi ^{[1
]}

Fuji, Masayoshi ^{[1
]}

Shirai, Takashi ^{[1
]}

机构：

[1] Nagoya Inst Technol, Adv Ceram Res Ctr, Honmachi 3-101-1, Gifu 5070033, Japan

来源：

ADVANCED POWDER TECHNOLOGY | 2016年 / 27卷 / 03期

基金：

日本科学技术振兴机构;

关键词：

TiO2; Hollow particles; Double-shell; SiO2; UV-vis; Effective-mass model; PHOTOCATALYTIC ACTIVITIES; TIO2; SIZE; DEGRADATION; ELECTRON; ANATASE; RUTILE;

D O I：

10.1016/j.apt.2015.10.016

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Well-defined SiO2/TiO2 double-shell hollow particles (STDSHPs) were successfully fabricated by a sol-gel method with avoiding the particle aggregations and the generation of freestanding TiO2 particles. Comparing with the conventional solid TiO2 particles, STDSHPs showed a novel hollow structure, a much smaller TiO2 grain size (9 nm), and a larger specific surface area (113 m(2)/g). In the UV-vis spectrum characterizations, STDSHPs showed significant light harvesting capability in both UV- and visible-light range. STDSHPs also showed stronger per-weight UV absorbance capability than solid TiO2 particles and commercial TiO2 photocatalyst P25, which could be attributed to their novel hollow structure-and thus the absence of light-inaccessible TiO2 particles. Moreover, we analyzed the narrowed band-gap of STDSHPs by the Brus' effective-mass model (EMM). (C) 2015 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：812 / 818

页数：7

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