Photocatalytic Activity of PbS Quantum Dot/TiO2 Nanotube Composites

被引：123

作者：

Ratanatawanate, Chalita

Tao, Yuan

Balkus, Kenneth J., Jr. ^{[1
]}

机构：

[1] Univ Texas Dallas, Dept Chem, Richardson, TX 75083 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 24期

基金：

美国国家科学基金会;

关键词：

MULTIPLE EXCITON GENERATION; VISIBLE-LIGHT IRRADIATION; TEXTILE WASTE-WATER; TITANIUM-DIOXIDE; FLUORESCENCE SPECTROSCOPY; AQUEOUS-SOLUTION; INDIGO CARMINE; REACTIVE DYES; TIO2; SURFACES; SETTLING RATE;

D O I：

10.1021/jp903050h

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：

PbS quantum dots (PbS QDs) were attached to TiO2 nanotubes oil both the inside and outside surfaces of the nanotubes by using thiolactic acid, a bifunctional linker. The PbS QDs with diameters of 4-5 nm were controlled by adjusting the concentration of thiolactic acid. The PbS QDs can be placed only inside the nanotubes by first blocking the outer surface of the TNTs with the double-chain cationic surfactant. The photocatalytic activity and stability of PbS/TiO2 nanotubes were evaluated for the photodegradation of organic dyes. The results indicate that the functionalized TiO2 nanotubes were superior catalysts for photodegradation of cationic dyes. Additionally, the quantum dots enhance the activity and expand the usable portion of the solar spectrum.

引用

收藏

页码：10755 / 10760

页数：6

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