Enhanced photocatalytic activity of mesoporous S-N-codoped TiO2 loaded with Ag nanoparticles

被引：10
作者：
Xie, Yi [1 ,2 ]
Kum, Jongmin [2 ]
Zhao, Xiujian [1 ]
Cho, Sung Oh [2 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China
[2] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Taejon 305701, South Korea
来源：
SEMICONDUCTOR SCIENCE AND TECHNOLOGY | 2011年 / 26卷 / 08期
基金：
美国国家科学基金会;
关键词：
DOPED TITANIUM-DIOXIDE; HIGHLY EFFICIENT; SILVER; WATER; PHOTODEGRADATION; OXIDATION; CARBON; FILMS; OXIDE;
D O I：
10.1088/0268-1242/26/8/085037
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Mesoporous S-N-codoped TiO2 photocatalyst loaded with Ag nanoparticles (NPs) were synthesized via a facile photochemical deposition approach. The samples were characterized by using x-ray photoelectron spectroscopy, transmission electron microscope, energy-dispersive x-ray spectroscopy (EDS) and UV-visible spectra. TEM images showed that metallic Ag NPs were deposited on S-N-codoped TiO2 NPs, which was further confirmed by EDS and surface plasmon absorption shown in UV-visible spectra. The samples possessed a homogeneous pore diameter and a high surface area of 153.3 m(2) g(-1) for the Ag-loaded S-N-codoped TiO2-vis samples, which facilitated the great enhancement of adsorption capacity for dye methyl orange (MO) molecules. Compared with S-N-codoped TiO2, Ag-loaded photocatalysts exhibited significantly enhanced catalytic activity under visible irradiation (lambda >= 420 nm), which was more than 14 times higher photocatalytic activity for MO degradation than that of P25 TiO2 under the same condition.
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页数：6
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