Synthesis of CeO2 hollow microspheres with oxidase-like activity and their application in the catalytic degradation of p-nitrophenol

被引：10

作者：

Li, Chunguang ^{[1
]}

Yue, Luhua ^{[1
]}

Wang, Jingjing ^{[1
]}

Zhou, Hao ^{[1
]}

Li, Ke ^{[1
]}

Cui, Jiehu ^{[1
]}

Zhang, Ke ^{[1
]}

Zheng, Binguo ^{[1
]}

Zhang, Rui ^{[1
]}

机构：

[1] Zhengzhou Univ Aeronaut, Henan Key Lab Aeronaut Mat & Applicat Technol, 15 Wenyuan West Rd, Zhengzhou 450046, Henan, Peoples R China

来源：

ENVIRONMENTAL TECHNOLOGY | 2021年 / 42卷 / 01期

基金：

中国国家自然科学基金;

关键词：

CeO2; HMS; oxidase-like activity; p-NP; degradation; PEROXIDASE-LIKE ACTIVITY; GOLD NANOPARTICLES; METHYLENE-BLUE; ACTIVATION; NANOMATERIALS; REDUCTION; EFFICIENT; MIMETICS; CERIA; H2O2;

D O I：

10.1080/09593330.2019.1624835

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

CeO2 materials have received wide attention given their oxidase-like activity without the need for an unstable oxide substrate in the catalytic process. Nevertheless, their application and mechanism in the catalytic oxidation of refractory organic pollutants needs further study. Herein, CeO2 hollow microspheres (HMS) with an intrinsic oxidase-like activity were synthesised via a template-free hydrothermal method and their effectiveness in degrading p-nitrophenol(p-NP) was investigated. HMS showed a maximum p-NP degradation rate of 76.5% at a CeO2 dosage of 40 mg, 2 h reactive time, at 30 degrees C and pH of 4.8 when the concentration of p-NP was 20 mg L-1. The catalytic activity of CeO2 HMS also exhibited good thermal stability and reusability. These results provide strong evidence that CeO2 HMS can be utilised as an oxidase mimetic for the efficient catalytic degradation of refractory organic pollutants. A possible mechanism for the degradation of p-NP is also discussed. [GRAPHICS] .

引用

页码：134 / 140

页数：7

共 29 条

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