Comparative Photocatalytic Ability of Nanocrystal-Carbon Nanotube and -TiO2 Nanocrystal Hybrid Nanostructures

被引：63

作者：

Ji, Kyung Hwan ^{[1
]}

Jang, Dong Myung ^{[1
]}

Cho, Yong Jae ^{[1
]}

Myung, Yoon ^{[1
]}

Kim, Han Sung ^{[1
]}

Kim, Yunhee ^{[1
]}

Park, Jeunghee ^{[1
]}

机构：

[1] Korea Univ, Dept Chem, Jochiwon 339700, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 46期

基金：

新加坡国家研究基金会;

关键词：

METHYLENE-BLUE; NANOSIZED CDS; DEGRADATION PATHWAY; HYDROGEN-PRODUCTION; TIO2; NANOCRYSTALS; COMPOSITES; WATER; ENHANCEMENT; FABRICATION; ADSORPTION;

D O I：

10.1021/jp906476m

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：

We synthesized various nanocrystal (e.g., CdS, CdSe, and Cu2S)-carbon nanotube (NC-CNT) and NC-TiO2 hybrid nanostructures using the solvothermal method and compared their photocatalytic ability toward the visible-light-driven degradation of methylene blue (MB) dye. The free US NCs exhibited higher degradation efficiency than the CdSe and Cu2S NCs. The photocatalytic abilities of the NCs were found to determine the relative degradation efficiency of their CNT and TiO2 hybrid nanostructures. These results suggest that the oxidative N-demethylation degradation involves the transfer of holes from the NCs to MB. The hybridization of the NCs with the TiO2 NCs and CNTs enhances the oxidative degradation rate to the same extent, suggesting that the interfacial electron transfer process from the NCs to the attached CNTs (or TiO2), which retards the recombination of the electrons and holes, is comparable for both hybrid nanostructures.

引用

页码：19966 / 19972

页数：7

共 43 条

[1] Preparation of titania/carbon nanotube composites using supercritical ethanol and their photocatalytic activity for phenol degradation under visible light irradiation [J].