日用化学工业（中英文）2025，Vol.55Issue(9)：1112-1119,8.DOI:10.3969/j.issn.2097-2806.2025.09.004
NH2-MIL-125(Ti)/C3N5复合材料的制备及光热催化还原CO2性能
Preparation of NH2-MIL-125(Ti)/C3N5 composite and its photothermal catalytic reduction of CO2 performance
摘要
Abstract
Photocatalytic reduction of CO2 to hydrocarbon fuel is of great significance to alleviate the energy crisis and greenhouse effect.However,the recombination of photoelectron-holes greatly limits the catalytic activity of single-component material.In order to solve this problem,a S scheme nitrogen-rich carbon nitride(C3N5)supported metal-organic framework NH2-MIL-125(Ti)[NH2-MIL-125(Ti)/C3N5]heterojunction composite material was constructed by solvothermal method.The crystal phase,elemental composition,microstructure,spectral absorption and photoelectron-hole recombination of the composite material were characterized by XRD,XPS,SEM,TEM,UV-vis DRS and PL.The activity and stability of the composites for photothermal catalytic reduction of CO2 were evaluated,and the mechanism of photothermal catalytic reduction of CO2 was discussed.The results show that NH2-MIL-125(Ti)/C3N5 exhibits significantly enhanced photothermal composite material reduction of CO2 activity compared to the single component composite material.The yields of CH3OH and CO are 3.33 and 0.34 μmol/(g·h),respectively.The significantly improved photothermal composite material reduction of CO2 activity is due to the high specific surface area of the composite material up to 674.916 m2/g and efficient photoelectron-hole separation efficiency.The construction of S scheme heterojunction between NH2-MIL-125(Ti)and C3N5 is proved by the change of binding energy position of in-situ XPS and ordinary XPS spectra.The charge ias transferred from NH2-MIL-125(Ti)to C3N5,and the bending energy band and built-in electric field realize the efficient separation of photoelectron-holes.The electrons and holes with high reduction and oxidation activity are retained in the conduction band of C3N5 and the valence band of NH2-MIL-125(Ti).Under the action of electron and thermal effects,CO2 is reduced to CH3OH and a small amount of CO is generated.关键词
NH2-MIL-125(Ti)/富氮氮化碳/S型异质结/光热催化/CO2还原/复合材料Key words
NH2-MIL-125(Ti)/nitrogen-rich carbon nitride/S scheme heterojunction/photothermal catalysis/CO2 reduction/composite material分类
化学化工引用本文复制引用
胡红丹,赵鑫..NH2-MIL-125(Ti)/C3N5复合材料的制备及光热催化还原CO2性能[J].日用化学工业（中英文）,2025,55(9):1112-1119,8.基金项目
国家自然科学基金面上项目(2271801) （2271801）
