应用化学2025，Vol.42Issue(8)：1125-1134,10.DOI:10.19894/j.issn.1000-0518.240359
三元硫化物增强g-C3N4光催化还原六价铬性能
Enhanced Photocatalytic Activity of g-C3N4 Towards Hexavalent Chromium with Ternary Sulfide
摘要
Abstract
Hexavalent chromium compounds are widely used in the chemical industry and are difficult to degrade naturally.Using composite nanomaterials as photocatalysts to treat hexavalent chromium Cr(Ⅵ)shows high photocatalytic activity.g-C3N4/ZnIn2S4 and g-C3N4/CaIn2S4 nano heterojunction materials were prepared by hydrothermal method,and characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),physical adsorption analyzer(BET),UV-visible near-infrared spectroscopy(UV-Vis-NIR),X-ray photoelectron spectroscopy(XPS)and electron spin resonance(EPR).The reduction capacity of g-C3N4/ZnIn2S4 and g-C3N4/CaIn2S4 materials on Cr(Ⅵ)was tested in both non illuminated and visible light environments,and 1,4-benzoquinone(PBQ,1 mmol),disodium ethylenediaminetetraacetic acid(EDTA-2 Na,1 mmol)and tert-butanol(TBA,0.5 mL)were used as scavengers for superoxide radicals(·O2-),holes(h+)and hydroxyl radicals(·OH).The active species of the photocatalytic reaction were determined based on the changes in the degradation concentration of Cr(Ⅵ)after capturing different radicals.The experimental results show that the g-C3N4/ZnIn2S4(1∶1)composite material and the g-C3N4/CaIn2S4(1∶1)composite material have the most significant catalytic effects on the reduction ability of Cr(Ⅵ),with degradation efficiencies reaching 95.5％and 60％respectively.Comparing the reduction ability of Cr(Ⅵ)by g-C3N4/ZnIn2S4 composite materials with different mass ratios(0.5∶1,1∶1 and 2∶1),it was found that a 1∶1 g-C3N4/ZnIn2S4 composite material had the best catalytic effect,followed by 0.5∶1 and 2∶1,the degradation efficiency was 27％and 16％,respectively;Superoxide radicals(O2),photogenerated holes(h+)and hydroxyl radicals(OH)all participate in the reaction,and the influence of free radicals is in the order of h+＞·O2-＞·OH.关键词
g-C3N4/ZnIn2S4/g-C3N4/CaIn2S4/光催化/六价铬Key words
g-C3N4/ZnIn2S4/g-C3N4/CaIn2S4/Photocatalytic/Hexavalent chromium分类
化学化工引用本文复制引用
邰玲,赵志超,景新华,丛吉祥,畅福善,张晓斌..三元硫化物增强g-C3N4光催化还原六价铬性能[J].应用化学,2025,42(8):1125-1134,10.基金项目
山西省运城市科技计划项目(No.YCKJ-2021032)、山西省运城盐湖保护利用研究院项目(No.YHYJ-2023004)和2024年山西省科自然科学基金(No.202303021211189)资助 Supported by the Science and Technology Project of Yun Cheng City,Shanxi Province(No.YCKJ-2021032),the Project of Salt Lake Protection and Utilization Research Institute of Yun Cheng,Shanxi Province(No.YHYJ-2023004)and the Natural Science Foundation(Face Nature Foundation)of Shanxi Province in 2024(No.202303021211189) （No.YCKJ-2021032）
