物理化学学报2026，Vol.42Issue(11)：139-155,17.DOI:10.1016/j.actphy.2026.100367
二维Ta2C助催化剂用于增强光催化H2O2合成及有机污染物降解
Two-dimensional Ta2C cocatalyst for enhanced H2O2 photosynthesis and organic pollutant degradation
摘要
Abstract
Hydrogen peroxide(H2O2)serves as an environmentally benign oxidant,and its photocatalytic synthesis coupled with environmental remediation is an extremely attractive strategy.To address sluggish charge dynamics and surface reaction in conventional photocatalysts,two-dimensional tantalum carbide(Ta2C)MXene was explored as an effective cocatalyst to engineer the interfacial electronic structure of graphitic carbon nitride(g-C3N4),enabling highly efficient H2O2 production and simultaneous tetracycline hydrochloride(TCH)degradation.Systematic characterization and theoretical calculations revealed that the significant work function difference between the two components induces Fermi level equilibration and facilitates built-in electric field formation,which drives directional photogenerated electron migration from g-C3N4 to Ta2C,accelerating charge separation and suppressing charge recombination.The optimized g-C3N4/Ta2C-6(CT-6)composite achieved an H2O2 production rate of 4584.7 μmol g-1 h-1,together with 86.56%of TCH degradation within 1 h,markedly outperforming pristine g-C3N4.Mechanistic studies show that H2O2 is mainly produced through a two-step one-electron oxygen reduction pathway,and the reactive oxygen species generated in the reaction play a key role in TCH degradation.This study demonstrates the potential of Ta2C as a non-noble-metal cocatalyst and establishes a clear correlation between interfacial electronic structure,charge transfer dynamics and photocatalytic reaction pathways in MXene-based heterojunctions,offering atomic-level insights and theoretical basis for the design of high-performance,multifunctional photocatalysts.关键词
H2O2制备/石墨相氮化碳/Ta2C MXene/助催化剂Key words
H2O2 production/Graphitic carbon nitride/Ta2C MXene/Cocatalyst分类
化学化工引用本文复制引用
何琳,陈林,陈润东,周贤龙,张帅,夏兵全..二维Ta2C助催化剂用于增强光催化H2O2合成及有机污染物降解[J].物理化学学报,2026,42(11):139-155,17.基金项目
本研究得到了国家自然科学基金(22409151,22402083) （22409151,22402083）
国家留学基金委 （）
武汉工程大学科学基金(23QD02)以及武汉工程大学研究生创新基金(CX2025140)的资助. （23QD02）
