首页|Modified NiFe-MOF with defects induced by-NH2 and-SH for enhanced adsorption and photocatalytic reduction of CO2
Modified NiFe-MOF with defects induced by-NH2 and-SH for enhanced adsorption and photocatalytic reduction of CO2
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In this study,a Ni-Fe metal-organic framework modified by-NH2 and-SH was synthesized using a sim-ple hydrothermal process for enhancing photocatalytic CO2 reduction.As expected,the N2S-NiFe(NH2-BDC/H4DSBDC,2∶1)displayed excellent photocatalytic CO2 reduction activity and high CO selectivity(12,412.23 μmol g-1 h-1)under visible light irradiation(λ ≥ 420 nm),which is 5 times that of NiFe-MOF.Notably,the excellent photocatalytic performance of N2S-NiFe can benefit from the rich defect trap site caused by the introduction of amino and sulfhydryl groups,accelerating charge transfer and promot-ing space charge separation,as supported by the photo-electrochemical properties.To better understand the CO2 adsorption mechanism,density functional theory calculations were performed,which revealed that the Niov site has more negative adsorption energy compared with the Feov site.This study pro-vides a simple strategy to establish efficient photocatalysts for CO2 reduction through the modification of organic ligands.
Ruting Huang、Yeyin Zhang、Wenqiang Li、Wanxia Zhang、Yong Fang、Wenrui Zhang、Anqi Cui、Yu Ying、Xianyang Shi
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Information Materials and Intelligent Sensing Laboratory of Anhui Province,Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration,School of Resource and Environmental Engineering,Anhui University,Hefei,230601,China
Key Laboratory of Nutrient Cycling Resources and Environment of Anhui,Institute of Soil and Fertilizer,Anhui Academy of Agricultural Sciences,Hefei,230001,China
国家自然科学基金国家自然科学基金Anhui Province Major Science and Technology Projects安徽省自然科学基金Natural Science Key Project of Education Department of Anhui Province
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