Self-cleaning semiconductor heterojunction substrate: ultrasensitive detection and photocatalytic degradation of organic pollutants for environmental remediation  

作　　者：Mingyue Hu Yingnan Quan Shuo Yang Rui Su Huilian Liu Ming Gao Lei Chen Jinghai Yang 

机构地区：[1]Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University,130103 Changchun,People’s Republic of China [2]National Demonstration Centre for Experimental Physics Education,Jilin Normal University,136000 Siping,People’s Republic of China [3]Key Laboratory of Preparation and Application of Environmental Friendly Materials,Jilin Normal University,Ministry of Education,130103 Changchun,People’s Republic of China [4]College of Science,Changchun University,130022 Changchun,People’s Republic of China [5]Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,130103 Changchun,People’s Republic of China

出　　处：《Microsystems & Nanoengineering》2020年第1期27-36,共10页微系统与纳米工程（英文）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.61675090,21776110,and 61705020);the National Youth Foundation of China(Nos.61405072,61704065,and 61705078);the Program for the Development of Science and Technology Jilin Province(Nos.20200301043RQ,20200201022JC,20190103002JH,and 20180520179JH);the Thirteenth Five-Year Program for Science and Technology of Education Department of Jilin Province(Grant Numbers JJKH20200418KJ,JJKH20191018KJ,JJKH20191022KJ,and JJKH20190550KJ);Tianjin Natural Science Foundation(Grant Number 16JCYBJC41400).

摘　　要：Emerging technologies in the field of environmental remediation are becoming increasingly significant owing to the increasing demand for eliminating significant amounts of pollution in water,soil,and air.We designed and synthesized MoS 2/Fe 2 O 3 heterojunction nanocomposites(NCs)as multifunctional materials that are easily separated and reused.The trace detection performance of the prepared sample was examined using bisphenol A(BPA)as the probe molecule,with limits of detection as low as 10−9 M;this detection limit is the lowest among all reported semiconductor substrates.BPA was subjected to rapid photocatalytic degradation by MoS_(2)/Fe_(2)O_(3) NCs under ultraviolet irradiation.The highly recyclable MoS_(2)/Fe_(2)O_(3) NCs exhibited photo-Fenton catalytic activity for BPA and good detection ability when reused as a surface-enhanced Raman scattering(SERS)substrate after catalysis.The SERS and photocatalysis mechanisms were proposed while considering the effects of the Z-scheme charge-transfer paths,three-dimensional flower-like structures,and dipole–dipole coupling.Moreover,the prepared MoS_(2)/Fe_(2)O_(3) NCs were successfully applied in the detection of BPA in real lake water and milk samples.Herein,we present insights into the development of MoS_(2)/Fe_(2)O_(3) materials,which can be used as multifunctional materials in chemical sensors and in photocatalytic wastewater treatments for the removal of recalcitrant organic pollutants.

关 键 词：DIPOLE PHOTOCATALYTIC ULTRAVIOLET 

分 类 号：X70[环境科学与工程—环境工程] TB383[一般工业技术—材料科学与工程]