无机材料学报2026，Vol.41Issue(2)：177-185,9.DOI:10.15541/jim20250097
2D/2D耦合构建ZnIn2S4/TiO2异质结及其增强的光催化还原CO2性能
2D/2D Coupled ZnIn2S4/TiO2 Heterojunction and Its Enhanced Photocatalytic Reduction of CO2
摘要
Abstract
As a typical photocatalytic material,titanium dioxide(TiO2)has been widely applied in environmental remediation and energy conversion due to its excellent chemical stability,non-toxicity and low cost.However,its wide bandgap structure restricts light absorption to ultraviolet wavelengths,and severe recombination of photogenerated electron-hole pairs in bulk materials limits quantum efficiency.Here,a hydrothermal method was used to construct a novel 2D/2D coupled ZnIn2S4(ZIS)@TiO2 composite material.This heterojunction consists of ultrathin TiO2 nanocages composited with ZIS nanosheets,exhibiting a unique hollow core-shell morphology.ZIS-T20 catalyst with composite 20 mg TiO2 nanocages demonstrates significantly enhanced light absorption across a broad wavelength range of 400-720 nm.Under influence of the built-in electric field,photo-generated electrons cannot migrate from conduction band(CB)of ZIS to that of TiO2,whereas the transfer of holes from valence band(VB)of ZIS to that of TiO2 proceeds unimpededly.This spatial separation effect preserves electrons with high reduction potential in ZIS,overcoming inherent drawback of reduced redox capability in conventional type-I heterojunctions.In photocatalytic CO2 reduction(PCR)reaction,ZIS@TiO2 exhibits improved performance,achieving CO and CH4 production rates of 58.87 and 12.03 μmol·g-1·h-1,respectively,with CO selectivity as high as 83.03%.Compared to individual components,the CO yield is 6.15 and 1.96 times higher than that of pristine ZIS and TiO2,respectively.This work not only provides a new strategy for designing efficient 2D/2D heterojunction photocatalysts,but also offers valuable insights into understanding interfacial charge transfer mechanisms.关键词
2D/2D耦合/TiO2纳米片/光催化CO2还原/异质结/ZnIn2S4Key words
2D/2D coupling/TiO2 nanosheet/photocatalytic CO2 reduction/heterojunction/ZnIn2S4分类
化学化工引用本文复制引用
朱建华,杨鑫,茹凌杰..2D/2D耦合构建ZnIn2S4/TiO2异质结及其增强的光催化还原CO2性能[J].无机材料学报,2026,41(2):177-185,9.基金项目
安徽省自然科学基金(2308085MB66) （2308085MB66）
安徽省重点研发项目(2022h11020028)Natural Science Foundation of Anhui Province(2308085MB66) （2022h11020028）
Key Research and Development Project of Anhui Province(2022h11020028) （2022h11020028）
