物理化学学报2024，Vol.40Issue(10)：48-51,4.DOI:10.3866/PKU.WHXB202311016
内建电场与偶极场协同增强SnNb2O6/富氮C3N5 S型异质结光催化性能
Synergistic Effects of Internal Electric and Dipole Fields in SnNb2O6/Nitrogen-Enriched C3N5 S-Scheme Heterojunction for Boosting Photocatalytic Performance
摘要
Abstract
Directional electron transfer is an appealing strategy for harnessing photogenerated charge separation kinetics.Herein,a novel 2D/1D SnNb2O6/nitrogen-enriched C3N5 S-scheme heterojunction with strong internal electric field(IEF)and dipole field(DF)is designed through in situ growth of C3N5 nanorods on SnNb2O6 nanosheets.The IEF generated at the interface via the formation of the S-scheme heterojunction induces directional charge transfer from SnNb2O6 to C3N5.Simultaneously,the DF within C3N5 provides the impetus to guide photo-excited electrons to the active sites.Consequently,the synergistic effects of IEF and DF facilitate swift directional electron transfer.The optimized SnNb2O6/C3N5 heterojunction demonstrates a remarkable H2 production rate of 1090.0 µmol·g-1·h-1 with continuous release of H2 bubbles.This performance surpasses that of SnNb2O6 and C3N5 by 38.8 and 10.7 times,respectively.Additionally,the SnNb2O6/C3N5 heterojunction exhibits superior activity in the removal of Rhodamine B,tetracycline,and Cr(VI).Based on electron paramagnetic resonance(EPR),time-resolved photoluminescence(TPRL)and density functional theory(DFT)calculations,etc.,the directional charge transfer mechanism was systematically explored.The research furnishes a plausible approach to construct effective heterojunction photocatalysts for applications in energy and environmental domains.关键词
SnNb2O6/C3N5/内建电场/偶极场/光催化性能/定向电荷转移Key words
SnNb2O6/C3N5/Internal electric field/Dipole field/Photocatalytic performance/Directional charge transfer分类
化学化工引用本文复制引用
刘倩倩,杜兴,李宛飞,戴维林,刘波..内建电场与偶极场协同增强SnNb2O6/富氮C3N5 S型异质结光催化性能[J].物理化学学报,2024,40(10):48-51,4.基金项目
This work is supported by National Natural Science Foundation of China(22002102,61904118,62205231),Postgraduate Research&Practice Innovation Program of Jiangsu Province(SJCX22_1555)and Jiangsu Key Laboratory for Environment Functional Materials.国家自然科学基金项目(22002102,61904118,62205231),江苏省研究生科研与实践创新项目(SJCX22_1555),江苏省环境功能材料重点实验室资助 （22002102,61904118,62205231）
