物理化学学报2025，Vol.41Issue(12)：84-98,15.DOI:10.1016/j.actphy.2025.100155
增强型双功能S型CoWO4/CdIn2S4异质结用于H2生成和甲醛降解
Enhanced bifunctional photocatalytic performances for H2 evolution and HCHO elimination with an S-scheme CoWO4/CdIn2S4 heterojunction
摘要
Abstract
Designing and establishing dual-functional S-scheme heterojunction photocatalysts with efficient separation of photoproduced carriers and intense oxidation/reduction capabilities holds immense practical value for their photocatalytic application in energy conversion and environmental purification.Herein,a novel series of x%CoWO4/CdIn2S4(x%reflects the weight ratio of CWO to CIS;x=10,20,30,40 and 50)composites have been systematically designed and synthesized via electrospinning technique and hydrothermal methods.Their photocatalytic properties were assessed through HCHO removal and H2 generation under visible light.As anticipated,the optimized 30%CWO/CIS heterojunction presented an outstanding H2 generation performance of 865.14 μmol g-1 h-1 with AQE=3.6%at λ=420 nm,and achieved a 69%removal percentage for HCHO within 1 h.Meanwhile,the pathway of HCHO degradation was presented based on in situ diffuse reflectance infrared Fourier transform spectroscopy(in situ DRIFTS)technique.The great catalytic performance was primarily ascribed to the enhancement in the visible-light absorption,number of active sites,and the construction of S-scheme heterojunction.Furthermore,the S-scheme charge transfer mechanism for the CWO/CIS catalyst system has been confirmed by in situ X-ray photoelectron spectroscopy(in situ XPS),electron spin resonance data,radical capturing experiments,and density functional theory(DFT)calculations.This research contributes valuable understanding for the systematic design and development of bifunctional S-scheme heterojunctions for gaseous pollutants removal and H2 production.关键词
CoWO4/CdIn2S4/产氢/甲醛降解/DFT计算Key words
CoWO4/CdIn2S4/H2 production/HCHO degradation/DFT calculations分类
化学化工引用本文复制引用
Chengxin Chen,Hongfei Shi,Xiaoyan Cai,Liang Mao,Zhe Chen..增强型双功能S型CoWO4/CdIn2S4异质结用于H2生成和甲醛降解[J].物理化学学报,2025,41(12):84-98,15.基金项目
The work was supported with the National Natural Science Foundation of China(22309061,22209203,22309204,22278172),and the Education Department project of Jilin Province(JJKH20240305KJ).and the Science and Technology Department project of Jilin Province(YDZJ202401372ZYTS). 国家自然科学基金(22309061,22209203,22309204,22278172),吉林省教育厅项目(JJKH20240305KJ)以及吉林省科学技术厅项目(YDZJ202401372ZYTS)资助 （22309061,22209203,22309204,22278172）
