中南民族大学学报（自然科学版）2026，Vol.45Issue(6)：730-743,14.DOI:10.20056/j.cnki.ZNMDZK.20260602
超声原位制备绣球状Vs-ZnIn2S4复合中空Vo-TiO2双功能S型催化剂及其光热协同催化性能
Ultrasonic in-situ preparation of hydrangea-like Vs-ZnIn2S4 composite hollow Vo-TiO2 bifunctional S-type catalyst and its photo-thermal synergistic catalytic performance
摘要
Abstract
Hollow cube-shaped Vo-TiO2 was synthesized via an ultrasonic solvothermal approach,and a bifunctional S-scheme photothermal catalyst,comprising hydrangea-like Vs-ZnIn2S4(Vs-ZIS)composited with Vo-TiO2,was subsequently fabricated through ultrasonic in-situ growth.Characterizations of SEM,TEM and EDS verified that hydrangea-like VS-ZIS was uniformly immobilized on the surface of hollow cube-shaped VO-TiO2,thereby constructing a compact S-scheme heterojunction.Morphology engineering notably expanded the visible-light absorption spectrum of the composite material.Under simulated irradiation,the photothermal catalytic performance was comprehensively assessed through the photocatalytic degradation of three representative dyes and tetracycline(TC),coupled with the photocatalytic reduction of Cr(VI)and CO2.The findings indicated that 20-DV-ZTiO2 displayed the most superior catalytic activity:the degradation efficiency of TC attained 95%within 60 minutes and was further augmented under heating conditions without cooling water;the reduction efficiency of Cr(Ⅵ)approached 99%within 20 minutes;the yield of CO was 80 μmol·g-1·h-1 and that of CH4 was 12 μmol·g-1·h-1,with their cumulative yield exceeding threefold that of the individual components,underscoring exceptional photothermal synergistic catalysis.ESR measurements confirmed the generation of ‧O₂-and ‧OH active radicals during the reaction.TC was effectively degraded through a stepwise mechanism involving functional group elimination,and ring-opening,driven by the attack of reactive radicals.In conjunction with HRTEM,XPS,and ESR analyses,an S-scheme heterojunction was confirmed at the Vs-ZIS/Vo-TiO2 interface,which markedly facilitated charge transfer and impeded the recombination of photogenerated carriers,thereby substantially enhancing the photothermal catalytic performance.The fabrication of S-scheme heterojunctions via ultrasonic in-situ growth integrated with morphology modulation constitutes an efficacious strategy to optimize the photocatalytic performance of Vs-ZIS/Vo-TiO2,which offers a solid theoretical and experimental foundation for optimizing photocatalysts through dual-vacancy engineering and interface modification,and promotes their practical application in water pollution remediation and clean energy conversion.关键词
超声原位生长/绣球状ZnIn2S4/双空位/光热协同催化Key words
ultrasonic in-situ growth/hydrangea-like ZnIn2S4/double vacancies/photothermal synergistic catalysis分类
化学化工引用本文复制引用
雷凯辉,雷金澌,徐悦悦,陈连清..超声原位制备绣球状Vs-ZnIn2S4复合中空Vo-TiO2双功能S型催化剂及其光热协同催化性能[J].中南民族大学学报（自然科学版）,2026,45(6):730-743,14.基金项目
国家自然科学基金资助项目(52272102) （52272102）
湖北省青年英才开发计划资助项目(RCJH15001) （RCJH15001）
湖北省杰出青年基金资助项目(2013CFA034) （2013CFA034）
中央高校基本科研业务费专项资金资助项目(CZZ24002) （CZZ24002）
