摘要
采用水热反应在超薄纳米片Ti_(3)C_(2)上原位生长Cu-ZnIn_(2)S_(4)复合微球,合成出Cu-ZnIn_(2)S_(4)/Ti_(3)C_(2)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ZnIn_(2)S_(4)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-ZnIn_(2)S_(4)对Cr(Ⅵ)的去除率可达69.5%,高于ZnIn_(2)S_(4)的44.3%;引入Ti_(3)C_(2)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60 min后Cu-ZnIn_(2)S_(4)/Ti_(3)C_(2)对Cr(Ⅵ)的去除率可达100%;Cu-ZnIn_(2)S_(4)/Ti_(3)C_(2)具有良好的循环稳定性。
Cu ZnIn_(2)S_(4) composite microsphere was in-situ grown on ultra-thin nanosheet Ti_(3)C_(2) by hydrothermal reaction to synthesize Cu ZnIn_(2)S_(4)/Ti_(3)C_(2) 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 ZnIn_(2)S_(4).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-ZnIn_(2)S_(4) is up to 69.5%after 60 min irradiation,which is higher than 44.3%of ZnIn_(2)S_(4);After the introduction of Ti_(3)C_(2),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-ZnIn_(2)S_(4)/Ti_(3)C_(2) after 60 min of illumination;And Cu-ZnIn_(2)S_(4)/Ti_(3)C_(2) has good cyclic stability.
作者
刘坤
杨鑫
茆平
孙爱武
沈锦优
丁宁
LIU Kun;YANG Xin;MAO Ping;SUN Aiwu;SHEN Jinyou;DING Ning(Faculty of Chemical Engineering,Huaiyin Institute of Technology,Huaian 223003,China;School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《化工环保》
CAS
CSCD
北大核心
2023年第4期456-463,共8页
Environmental Protection of Chemical Industry
基金
国家自然科学基金项目(51908240)
江苏省自然科学基金项目(BK20181064)
江苏高校“青蓝工程”项目(2021年)。
