纳米铜掺杂在TiO₂-SiO₂纳米颗粒催化剂上用于直接蓝染料的光催化降解。

Nano Cu metal doped on TiO2-SiO2 nanoparticle catalysts in photocatalytic degradation of direct blue dye.

作者信息

Mohamed R M, Mkhalid I A, Al-Thabaiti S A, Mokhtar Mohamed

机构信息

Faculty of Science, Chemistry Department, King Abdulaziz University, PO Box: 80203, Jeddah 21589, Saudi Arabia.

出版信息

J Nanosci Nanotechnol. 2013 Jul;13(7):4975-80. doi: 10.1166/jnn.2013.7602.

DOI:10.1166/jnn.2013.7602

PMID:23901519

Abstract

The photo-assisted deposition (PAD) and impregnation (Img) synthesis of nano-sized Cu metal on TiO2-SiO2 are reported. The prepared catalysts were characterized by different techniques such as XRD, EXAFS, TEM and nitrogen adsorption analysis. Photocatalytic reactivity using Cu-TiO2-SiO2 catalysts under visible-light condition on the oxidation of direct blue dye with O2 reaction was evaluated. The results have shown notable photocatalytic activity of PAD-Cu/TiO2-SiO2 which was 1.6 and 10 times higher than that of Img-Cu/TiO2-SiO2 and TiO2-SiO2, respectively.

摘要

报道了在TiO₂-SiO₂上通过光辅助沉积（PAD）和浸渍（Img）合成纳米尺寸的铜金属。通过X射线衍射（XRD）、扩展X射线吸收精细结构（EXAFS）、透射电子显微镜（TEM）和氮吸附分析等不同技术对制备的催化剂进行了表征。评估了在可见光条件下使用Cu-TiO₂-SiO₂催化剂对直接蓝染料与O₂反应的光催化氧化活性。结果表明，PAD-Cu/TiO₂-SiO₂具有显著的光催化活性，分别比Img-Cu/TiO₂-SiO₂和TiO₂-SiO₂高1.6倍和10倍。