生物质炭/ZnO/BiFeO_(3)复合材料的制备及光催化性能  

Preparation and photocatalytic performance of biochar/ZnO/BiFeO_(3) composites

作　　者：曹海林 罗洁[1] 刘文凯 Cao Hailin;Luo Jie;Liu Wenkai(School of Materials Science and Engineering,Central South University of Forestry and Technology,Changsha 410004)

机构地区：[1]中南林业科技大学材料科学与工程学院,长沙410004

出　　处：《化工新型材料》2023年第11期162-165,170,共5页New Chemical Materials

基　　金：国家重点研发计划项目(2019YFB1503805);湖南省自然科学基金项目(2019JJ40535);湖南省大学生创新训练计划项目(2022-2824)。

摘　　要：以玉米秸秆生物炭和硝酸铋为原料,采用柠檬酸络合一步煅烧法,制备了具有可见光响应能力的生物质炭/ZnO/BiFeO_(3)复合材料。通过紫外-可见漫反射(UV-Vis DRS)、X射线衍射(XRD)、扫描电子显微镜(SEM)对样品的结构和形貌进行表征分析,并考察了样品对甲基橙溶液的降解效果。结果表明:1g/L生物质炭/ZnO/BiFeO_(3)复合材料在300W氙灯下照射120min,对10mg/L甲基橙溶液的降解率达到99.4%,是BiFeO_(3)的2.9倍,循环4次后其降解率仍有94.0%。超氧基自由基(·O_(2)^(-))在光催化降解过程中起决定性作用。Using corn stalk biochar and bismuth nitrate as raw materials,biochar/ZnO/BiFeO_(3) composites with visible light responsiveness were prepared by citric acid complexation one-step calcination method.The structure and morphology of the samples were characterized by ultraviolet-visible diffuse reflectance(UV-Vis DRS),X-ray diffraction(XRD)and scanning electron microscopy(SEM),and the degradation efficiency of the samples for methyl orange solution was investigated.The results showed that the degradation rate of 1g/L biochar/ZnO/BiFeO_(3) composite reached 99.4% for 10mg/L methyl orange solution under 300W xenon lamp irradiation for 120min,which was 2.9 times higher than that of BiFeO_(3).The degradation rate was still 94.0% after 4 cycles.The superoxide radical(·O_(2)^(-))played a decisive role in the photocatalytic degradation process.

关 键 词：柠檬酸络合法 生物质炭 氧化锌 铁酸铋 光催化 

分 类 号：O643.36[理学—物理化学] X703.1[理学—化学]