物理化学学报2025，Vol.41Issue(8)：126-136,11.DOI:10.1016/j.actphy.2025.100095
优化氮化碳纳米片/球形共轭聚合物S型异质结界面电场以促进析氢反应
Optimizing interfacial electric fields in carbon nitride nanosheet/spherical conjugated polymer S-scheme heterojunction for hydrogen evolution
摘要
Abstract
Designing heterojunctions based on carbon nitride offers a promising pathway for enhancing photocatalytic efficiency.This study develops an all-organic S-scheme metal-free heterojunction uniquely composed of carbon nitride nanosheets(GCNNS)and a donor-acceptor conjugated polymer,poly p-aminobenzylidene-so-aniline(PASO),synthesized through a simple yet effective ball-milling technique.This heterojunction demonstrates excellent photocatalytic efficiency for hydrogen(H2)evolution.The optimized GCNNS/PASO-10 sample attains an H2 evolution rate of 10.12 mmol∙g-1∙h-1,which is about 5.9 times and 19.5 times greater than those of pure GCNNS and PASO,respectively.This improvement is due to the unique interfacial bonding,increased visible-light absorption,and efficient charge carrier separation facilitated by a strong internal electric field within the S-scheme.Theoretical calculations and characterization reveal that this heterojunction's S-scheme mechanism optimally aligns energy bands and promotes spatial charge separation,driving superior photocatalytic activity.This work presents the unique advantage of all-organic materials for heterojunction construction and provides insights into designing advanced S-scheme systems for sustainable energy conversion.关键词
全有机异质结/氮化碳纳米片/S型异质结/产氢/D-A共轭聚合物Key words
All-organic heterojunction/Carbon nitride nanosheets/S-scheme heterojunction/H2 evolution/D-A conjugated polymers分类
化学化工引用本文复制引用
孟凡鹏,赵飞,林靖恺,赵金生,张华阳,王少彬..优化氮化碳纳米片/球形共轭聚合物S型异质结界面电场以促进析氢反应[J].物理化学学报,2025,41(8):126-136,11.基金项目
This work was funded by the National Natural Science Foundation of China(22302085,22172069),the Natural Science Foundation of Shandong Province(ZR2024QB046,ZR2021ME071)and the Research Projects of Liaocheng University(318052272).H.Zhang and S.Wang acknowledges the support from Discovery Project(DP230102406,DP240102787),and Australian Laureate Fellowships(FL230100178)from the Australian Research Council.国家自然科学基金(22302085,22172069),山东省自然科学基金(ZR2024QB046,ZR2021ME071)及聊城大学科研项目(318052272)资助.张华阳与王少彬获澳大利亚研究委员会发现项目(DP230102406,DP240102787)及桂冠学者计划(FL230100178)支持 （22302085,22172069）
