氧化锌/石墨烯复合材料的制备及其光催化性能

doi:10.12066/j.issn.1007-2861.2040

Abstract

Abstract:

Dyeing wastewater has deep color, serious toxicity and poor biodegradability. As a result, it is necessary to decolour and mineralize it before entering seas or rivers. Semiconductor photocatalytic oxidation is considered as a promising technology for the degradation of persistent organic pollutant for its high efficiency and environmental friendliness, and the heart of this technology is to design the photocatalysts. As a common semiconductor, low specific surface area and low photocatalysis stay in the way of the application of zinc oxide (ZnO). In this study, graphene has been introduced to synthesize microspheres through a two-step hydrothermal reaction. On the one hand, graphene can absorb more pollutant due to its large area surface; on the other hand, it can act as electron receiver for its high conductivity, thereby declining the recombination of electron and hole, and improving the photocatalytic efficiency. The photocatalytic degradation study displayed the removal of methylene blue using pure zinc oxide and 1.0 % ZnO/RGO as catalysts were ca. 59.0% and ca. 89.2% (the highest) in 100 min, respectively, and the chemical oxygen demard (TOC) removals of methylene blue (MB) solution under the photocatalysis composite reaches 59.5%.

Key words: ZnO, photocatalysis, graphene, methylene blue (MB)

CLC Number:

O614.7

LI Qi, LUO Zhigang, CHEN Dayong, HUANG Shoushuang, HU Zhangjun, CHEN Zhiwen. Preparation and photocatalytic properties of ZnO/graphene composite[J]. Journal of Shanghai University（Natural Science Edition）, 2020, 26(3): 425-432.

Figures/Tables 7

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Table 1

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References 21

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Preparation and photocatalytic properties of ZnO/graphene composite

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