Abstract
Crafting photoelectrocatalytic materials with robust oxidation-reduction properties for simultaneous hydrogen evolution and pollutant degradation poses a formidable challenge.In this study,a pg-C3N4/β-FeOOH S-scheme heterostructure with a special energy band structure was developed by anchoring porous pg-C3N4 on needle shaped β-FeOOH.Functioning as a hole extraction layer,needle-leaf-like β-FeOOH can facilitate efficient hole migration and enhance charge transport.Remarkably,the optimized 0.2-pg-C3N4/β-FeOOH could degrade 78％of ofloxacin(OFLO)in 90 min.The organic pollutants could absorb a large number of holes,which prompted a greater proportion of photogenerated electrons to actively participate in the hydrogen evolution reaction at the cathode.Consequently,the hydrogen production of 0.2-pg-C3N4/β-FeOOH reached 1452.88 μmol cm-2 h-1,exhibiting a notable increase of 61.81-165.12 μmol cm-2 h-1 compared with that in the absence of pollutants.Experimental and theoretical calculation results underscore that this investigation is grounded in a distinctive electron and hole dual channel transfer mechanism.These findings offer novel insights for the future development of S-scheme heterojunction photoelec-trocatalytic materials capable of concurrently degrading pollutants and promoting hydrogen evolution.
基金项目
国家自然科学基金(22262024)
国家自然科学基金(22272070)
国家自然科学基金(52272063)
Jiangxi Province Academic and Technical Leader of Major Disciplines(20232BCJ22008)
Key Project of Natural Science Foundation of Jiangxi Province(20232ACB204007)
Double Thousand Talent Plan of Jiangxi Province()
State Key Laboratory of Highefficiency Utilization of Coal and Green Chemical Engineering(2022-K31)
Zhejiang Province Key Research and Development Project(2023 C01191)
万方数据