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Effect of Zinc Acetate Concentration on Optimization of Photocatalytic Activity of p-Co 3 O 4/n-ZnO Heterostructures

Hongyan Xu, Mingliang Shi, Caiqin Liang, Siyan Wang, Chengkai Xia, Chenyang Xue, Zhenyin Hai, Serge Zhuiykov

Nanoscale Res Lett. 2018 Jul 5;13(1):195.

PMID: 29978416

Abstract:

In this work, p-Co3O4/n-ZnO heterostructures were fabricated on Ni substrate by hydrothermal-decomposition method using cobaltous nitrate hexahydrate (Co(NO3)2·6H2O) and zinc acetate dihydrate (Zn(CH3COO)2·2H2O) as precursors with zinc acetate concentration varying from 5.0 to 55.0 mM. Structure and morphology of the developed samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM). Effect of zinc acetate concentration on the photocatalytic activity of p-Co3O4/n-ZnO heterostructures was investigated by degradation of methyl orange (MO) under the UV light irradiation. The fabricated p-Co3O4/n-ZnO heterostructures exhibited higher photocatalytic activity than pure Co3O4 particles. In order to obtain the maximum photocatalytic activity, zinc acetate concentration was optimized. Specifically, at 35 mM of zinc acetate, the p-Co3O4/n-ZnO showed the highest photocatalytic activity with the degradation efficiency of MO reaching 89.38% after 72 h irradiation. The improvement of photocatalytic performance of p-Co3O4/n-ZnO heterostructures is due to the increased concentration of photo-generated holes on Co3O4 surface and the higher surface-to-volume ratio in the hierarchical structure formed by nano-lamellas.

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
AP5970456 Zinc acetate dihydrate Zinc acetate dihydrate 5970-45-6 Price
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