首页|Visible light assisted enzyme-photocatalytic cascade degradation of organophosphorus pesticides

Visible light assisted enzyme-photocatalytic cascade degradation of organophosphorus pesticides

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The worldwide application of organophosphorus pesticides(OPs)has promoted agricultural development,but their gradual accumulation in soil and water can seriously affect the central nervous system of humans and other mammals.Organophosphorus hydrolase(OPH)is an effective enzyme that can catalyze the degradation of the residual OPs.However,the degradation products such as p-nitrophenol(p-NP)is still toxic.Thus,it is of great significance to develop a multi-functional support that can be simultaneously used for the immobilization of OPH and the further degradation of p-NP.Herein,a visible light assisted enzyme-photocatalytic integrated catalyst was constructed by immobilizing OPH on hollow structured Au-TiO2(named OPH@H-Au-TiO2)for the degradation of OPs.The obtained OPH@H-Au-TiO2 can degrade methyl parathion to p-NP by OPH and then degrade p-NP to hydroquinone with low toxicity by using H-Au-TiO2 under visible light.OPH molecules were immobilized on H-Au-TiO2 through adsorption method to prepare OPH@H-Au-TiO2.After 2.5 h of reaction,methyl parathion is completely degraded,and about 82.64％of the generated p-NP is further degraded into hydroquinone.After reused for 4 times,the OPH@H-Au-TiO2 retains more than 80％of the initial degradation activity.This research presents a new insight in designing and constructing multi-functional biocatalyst,which greatly expands the application scenarios and industrial value of enzyme catalysis.

Organophosphorus pesticidesMulti-functional biocatalystEnzyme-photocatalytic cascade catalystImmobilized enzymeOrganophosphorus hydrolase

Ying Zhang、Xue Cao、Yufeng Yang、Sumin Guan、Xiaotian Wang、Heyu Li、Xiaobing Zheng、Liya Zhou、Yanjun Jiang、Jing Gao

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School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin,300130,China

Hebei Xinlan Environmental Protection Engineering Co.Ltd.,Baoding 071000,China

Tianjin UBasio Biotechnology Group Co.,Ltd,Tianjin 300457,China

National Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization,Hebei University of Technology,Tianjin,300130,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaTianjin Enterprise Science and Technology Commissioner,ChinaScience Technology Research Project of Higher Education of Hebei Province,ChinaHebei Province Postgraduate Innovation Funding Project,ChinaNational College Student's Science and Technology Innovation Project,China

21901058219080402187806821YDTPJC00810QN2021045CXZZSS2021027202010080038

2023

绿色化学工程(英文)
中国科学院过程工程研究所

绿色化学工程(英文)

CSCD
ISSN：
年,卷(期)：2023.4(1)
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