【摘要】 采用水热反应在超薄纳米片Ti₃C₂上原位生长Cu-Zn In₂S₄复合微球，合成出Cu-Zn In₂S₄/Ti₃C₂复合材料，并将其用于可见光下光催化还原水中Cr（Ⅵ）（50 mg/L）。表征结果显示：复合材料中的Cu主要以单质铜的形式存在，但含量较低；复合材料对可见光的吸收性能较Zn In₂S₄显著提升。实验结果表明：得益于Cu的掺杂提高了载流子密度和电荷传输效率以及其直接还原Cr（Ⅵ）的性能，光照60 min后Cu-Zn In₂S₄对Cr（Ⅵ）的去除率可达69.5%，高于Zn In₂S₄的44.3%；引入Ti₃C₂后，复合材料的强界面作用有效延长了光生载流子的寿命，使得光照60min后Cu-Zn In₂S₄/Ti₃C₂对Cr（Ⅵ）的去除率可达100%;Cu-Zn In₂S₄/Ti₃C₂具有良好的循环稳定性。更多还原

【Abstract】 Cu Zn In₂S₄ composite microsphere was in-situ grown on ultra-thin nanosheet Ti₃C₂ by hydrothermal reaction to synthesize Cu Zn In₂S₄/Ti₃C₂ composite,and the composite was used for photocatalytic reduction of Cr（Ⅵ）（50 mg/L）from water under visible light.The characterization results show that:Cu in the composite mainly exists in the form of elemental copper,but its content is low;The visible light absorption performance of the composite is significantly improved compared with that of Zn In₂S₄.The experimental results show that:Profiting from the increase of carrier density,charge transfer efficiency and direct reduction performance of Cr（Ⅵ）by Cu doping,the removal rate of Cr（Ⅵ）by Cu-Zn In₂S₄ is up to 69.5%after 60 min irradiation,which is higher than 44.3%of Zn In₂S₄;After the introduction of Ti₃C₂,the strong interface effect of the composite effectively extends the lifetime of photo generated charge carriers,resulting in a 100%of Cr（Ⅵ）removal rate by Cu-Zn In₂S₄/Ti₃C₂ after 60 min of illumination;And Cu-Zn In₂S₄/Ti₃C₂ has good cyclic stability.更多还原