☆ 4.5 Article

Synthesis and photocatalytic activity of p-n junction CeO2/Co3O4 photocatalyst for the removal of various dyes from wastewater

MATERIALS RESEARCH EXPRESS (2018)

期刊

MATERIALS RESEARCH EXPRESS

卷 5, 期 4, 页码 -

出版社

IOP PUBLISHING LTD

DOI: 10.1088/2053-1591/aabdd8

关键词

coprecipitation method; visible light irradiation; photocatalytic activity; catalyst concentration; p-n junction

类别

Materials Science, Multidisciplinary

资金

National Natural Science Foundation of China [51478285]
Collegiate Natural Science Fund of Jiangsu Province [16KJA430008]
Jiangsu Collaborative Innovation Center of Technology and Material for Water Treatment
Open Project Program of the State Key Lab of Functional Materials for Informatics [2015-XCL-029, SKL201311]
Science and Technology Development Project of Suzhou [SYG201742]
People's Livelihood Plan of Science and Technology of Xiangcheng Zone [201708]

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Protocol

Reagent

摘要

CeO2, Co3O4, and Co3O4/CeO2 composites are successfully synthesized by a simple coprecipitation method. X-ray powder diffraction (XRD) and Fourier transform infrared (FTIR) results indicate that the CeO2, Co3O4, and Co3O4/CeO2 precursors sintered at 500 degrees C has good crystallization. The cerium nitrate introduced into cobalt nitrate precursor solution improved the surface morphology and photocatalytic activity of Co3O4 significantly. The photo-degradation of methylene blue (MB), xylenol orange (XO), methyl orange (MO), and methyl red (MR) catalyzed by prepared nanocomposites were studied under visible light irradiation. Photocatalytic experiment results indicate that the photocatalytic activity of Co3O4/CeO2 composites for degradation of various dyes highly depend on pH value. The optimum conditions for the photocatalytic experiments of Co3O4/CeO2 composites were determined to be as follows: dye concentration, 50 mg L-1, and catalyst concentration, 50 mg L-1. The excellent photocatalytic activity of the p-n junction Co3O4/CeO2 composites can be ascribed to the center dot O2- radicals and h(+).

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