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使用ZnO/rGO复合材料光催化降解有机磷农药

Photocatalytic degradation of an organophosphorus pesticide using a ZnO/rGO composite.

作者信息

Zhu Zihan, Guo Feng, Xu Zhonghao, Di Xiaoxuan, Zhang Qian

机构信息

Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Ocean Science and Technology, Dalian University of Technology Panjin 124221 China

出版信息

RSC Adv. 2020 Mar 24;10(20):11929-11938. doi: 10.1039/d0ra01741h. eCollection 2020 Mar 19.

DOI:10.1039/d0ra01741h
PMID:35685612
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9122623/
Abstract

A zinc oxide (ZnO)/reduced graphene oxide (rGO) nanocomposite was synthesized a hydrothermal synthesis method and used for the photocatalytic degradation of dimethoate. In the synthesis process of the ZnO/rGO nanocomposite, hexamethylenetetramine (HMT) was used as both a mineralizer and reducing agent. When the ZnO nanoparticles formed on the surfaces of graphene oxide sheets, the sheets were simultaneously reduced by HMT to form rGO. The photodegradation rate and photodegradation efficiency of dimethoate by the ZnO/rGO nanocomposite were 4 and 1.5 times, respectively, higher than those of bare ZnO. The ZnO/rGO nanocomposite possessed a high surface area of 41.0 m g and pore volume of 4.72 × 10 cm g, which were conducive to the adsorption and mass transfer of pesticides and oxygen. The enhanced photocatalytic performance of the ZnO/rGO nanocomposite was attributed to the decrease in electron-hole recombination rate and effective carrier transport caused by the presence of rGO. Photoelectrochemical measurements confirmed that the nanocomposite exhibited a high charge transfer rate at the ZnO/rGO interface. These results indicate that ZnO/rGO nanocomposites have great application potential in pollutant degradation.

摘要

采用水热合成法合成了氧化锌（ZnO）/还原氧化石墨烯（rGO）纳米复合材料，并将其用于乐果的光催化降解。在ZnO/rGO纳米复合材料的合成过程中，六亚甲基四胺（HMT）用作矿化剂和还原剂。当ZnO纳米颗粒在氧化石墨烯片表面形成时，这些片层同时被HMT还原形成rGO。ZnO/rGO纳米复合材料对乐果的光降解速率和光降解效率分别比纯ZnO高4倍和1.5倍。ZnO/rGO纳米复合材料具有41.0 m²/g的高比表面积和4.72×10⁻² cm³/g的孔体积，这有利于农药和氧气的吸附及传质。ZnO/rGO纳米复合材料光催化性能的增强归因于rGO的存在导致电子-空穴复合率降低以及有效的载流子传输。光电化学测量证实，该纳米复合材料在ZnO/rGO界面表现出高电荷转移速率。这些结果表明，ZnO/rGO纳米复合材料在污染物降解方面具有巨大的应用潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/936a78ba1daf/d0ra01741h-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/fca673988c3e/d0ra01741h-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/ad09be74642e/d0ra01741h-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/88e9dc9ca8a2/d0ra01741h-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/f14d797dc4f5/d0ra01741h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/c1aefcd6ff5a/d0ra01741h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/185be93d72a2/d0ra01741h-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/936a78ba1daf/d0ra01741h-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/fca673988c3e/d0ra01741h-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/ad09be74642e/d0ra01741h-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/88e9dc9ca8a2/d0ra01741h-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/f14d797dc4f5/d0ra01741h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/c1aefcd6ff5a/d0ra01741h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/185be93d72a2/d0ra01741h-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dfe7/9122623/936a78ba1daf/d0ra01741h-f7.jpg

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[4]
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[5]
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[8]
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本文引用的文献

[1]
Enhanced photocatalytic degradation of methyl orange by porous graphene/ZnO nanocomposite.

Environ Pollut. 2019-3-28

[2]
An alkaline phosphatase from Bacillus amyloliquefaciens YP6 of new application in biodegradation of five broad-spectrum organophosphorus pesticides.

J Environ Sci Health B. 2019

[3]
Characteristics and mechanisms of chlorpyrifos and chlorpyrifos-methyl adsorption onto biochars: Influence of deashing and low molecular weight organic acid (LMWOA) aging and co-existence.

Sci Total Environ. 2018-12-4

[4]
A higher efficiency removal of neonicotinoid insecticides by modified cellulose-based complex particle.

Int J Biol Macromol. 2018-12-28

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Ecotoxicol Environ Saf. 2018-12-6

[6]
A review on removal of organophosphorus pesticides in constructed wetland: Performance, mechanism and influencing factors.

Sci Total Environ. 2018-10-10

[7]
Ternary semiconductor ZnAgS nanocomposites for efficient photocatalytic degradation of organophosphorus pesticides.

Photochem Photobiol Sci. 2018-10-10

[8]
Novel Pathways of Endocrine Disruption Through Pesticides Interference With Human Mineralocorticoid Receptors.

Toxicol Sci. 2018-3-1

[9]
Effects of deltamethrin, dimethoate, and chlorpyrifos on survival and reproduction of the collembolan Folsomia candida and the predatory mite Hypoaspis aculeifer in two African and two European soils.

Integr Environ Assess Manag. 2018-1

[10]
Historical records and sources of polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs) in sediment from a representative plateau lake, China.

Chemosphere. 2017-4

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