Photocatalytic degradation mechanisms of self-assembled rose-flower-like CeO2 hierarchical nanostructures

被引：31

作者：

Arul, N. Sabari ^{[1
,2
]}

Mangalaraj, D. ^{[2
]}

Kim, Tae Whan ^{[1
]}

机构：

[1] Hanyang Univ, Dept Elect Engn, Seoul 133791, South Korea

[2] Bharathiar Univ, Dept Nanosci & Technol, Coimbatore 641046, Tamil Nadu, India

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 22期

基金：

新加坡国家研究基金会;

关键词：

ACID ORANGE-7; PERFORMANCE; ADSORPTION; OXIDATION;

D O I：

10.1063/1.4810005

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Hierarchical rose-flower-like CeO2 nanostructures were formed by using solvothermal and thermal annealing processes. The CeCO3OH thin film was transformed into CeO2 roses due to thermal annealing. CeO2 nanostructured roses exhibited excellent photocatalytic activity with a degradation rate of 65% for the azo dye acid orange 7 (AO7) under ultraviolet illumination. The fitting of the absorbance maximum versus time showed that the degradation of AO7 obeyed pseudo-first-order reaction kinetics. The enhancement of the photocatalytic activity for the CeO2 roses was attributed to the high adsorptivity resulting from the surface active sites and special 4f electron configuration. (C) 2013 AIP Publishing LLC.

引用

页数：4

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