Cu_(2)O/Cu_(2)S复合材料制备及可见光催化降解甲基橙的研究  

Preparation of Cu_(2)O/Cu_(2)S Composite and Study on Visible Photocatalytic Degradation of Methyl Orange

作　　者：汪天霄 王雨舟 郭昕 陈胜文[1] 王利军[1] WANG Tianxiao;WANG Yuzhou;GUO Xin;CHEN Shengwen;WANG Lijun(School of Resources and Environmental Engineering,Shanghai Polytechnic University,Shanghai 201209,China)

机构地区：[1]上海第二工业大学资源与环境工程学院,上海201209

出　　处：《上海第二工业大学学报》2022年第4期325-330,共6页Journal of Shanghai Polytechnic University

摘　　要：通过水热法制备Cu_(2)O/Cu_(2)S复合材料对甲基橙(MO)进行光催化降解实验。在Cu_(2)O中引入S元素,通过改变Cu/S投加摩尔比,从而得到不同Cu/S的复合材料。利用XRD、SEM、UV-vis、EIS等手段对材料进行表征,并对MO进行光催化降解实验。XRD结果表明,随着S含量的增多,Cu_(2)S的衍射强度逐渐上升,Cu_(2)O的{111}晶面衍射强度逐渐降低。SEM结果表明Cu_(2)S能较好地包覆在Cu_(2)O八面体的表面。通过UV-vis和EIS结果计算得知,复合材料带隙为1.49 eV,电荷转移电阻大幅降低。降解实验结果表明复合材料最佳Cu/S投加摩尔比为15:1,其在100 min时对MO(100 mL,10 mg/L)降解率达到91.4%,明显高于纯Cu_(2)O对于MO的降解率(60.3%)。猝灭实验表明了·OH和·O2-在光催化过程中起到主要作用。Photocatalytic degradation of methyl orange(MO)by Cu2O/Cu_(2)S composite material prepared by hydrothermal method was studied.By introducing S element into Cu2O and changing the molar ratio of Cu/S,different Cu/S composites were obtained.The materials were characterized by XRD,SEM,UV-vis and EIS,and photocatalytic degradation of MO was carried out.XRD results show that with the increase of S content,the diffraction intensity of Cu_(2)S increases gradually,while the diffraction intensity of{111}plane of Cu2O decreases gradually.SEM results show that Cu_(2)S can coat the surface of Cu2O octahedron well.According to UV-vis and EIS results,the band gap of the composite is 1.49 eV,and the charge transfer resistance is greatly reduced.The results of degradation experiments show that the optimum Cu/S molar ratio is 15:1,and the degradation rate of MO(100 mL,10 mg/L)reaches 91.4%at 100min,which is signifcantly higher than that of pure Cu2O(60.3%).The quenching experiments show that·OH and·O2-play a major role in the photocatalytic process.

关 键 词：水热法 Cu_(2)O/Cu_(2)S复合材料 光催化 甲基橙 

分 类 号：X703[环境科学与工程—环境工程]