FeWO_(4)/g-C_(3)N_(4)复合材料的制备及其对亚甲基蓝的光催化降解研究  

Preparation of FeWO_(4)/g-C_(3)N_(4) composite material and its photocatalytic degradation of methylene blue

作　　者：马骁 陈华林 陈全亮 MA Xiao;CHEN Hua-lin;CHEN Quan-liang(Key Laboratory of Basic Chemistry of the State Ethnic Commission,School of Chemistry and Environment,Southwest Minzu University,Chengdu 610041,China)

机构地区：[1]西南民族大学化学与环境学院,化学基础国家民委重点实验室,四川成都610041

出　　处：《西南民族大学学报（自然科学版）》2021年第6期581-587,共7页Journal of Southwest Minzu University(Natural Science Edition)

基　　金：四川省青年科技创新研究团队专项计划资助项目(2017TD0024);西南民族大学中央高校基本科研业务费专项(2020NQN14)。

摘　　要：采用溶剂热法制备FeWO_(4)/g-C_(3)N_(4)复合光催化剂.利用红外光谱(IR)、X射线粉末衍射仪(XRD)、扫描电子显微镜(SEM)对催化剂的组成和形貌进行表征,证明FeWO_(4)成功复合到g-C_(3)N_(4)上.在可见光下,纯g-C_(3)N_(4)和不同比例FeWO_(4)/g-C_(3)N_(4)复合催化剂对亚甲基蓝进行光催化降解.结果表明,FeWO_(4)/g-C_(3)N_(4)复合催化剂与纯g-C_(3)N_(4)相比,前者表现出更好的光催化活性.当FeWO_(4)复合比例为50%时,亚甲基蓝的降解率可达87.3%,同时催化剂显示出良好循环稳定性.固体紫外和荧光光谱研究表明FeWO_(4)和g-C_(3)N_(4)复合有利于抑制光生载流子的复合,降低了禁带宽度,提高了可见光的利用率.Asolvothermal method was used to prepare FeWO_(4)/g-C_(3)N_(4) composite photocatalysts.The composition and morphol-ogy of the catalysts were characterized by infrared spectra(IR),X-ray powderdiffraction(XRD)and scanning electron mi-croscopy(SEM),which proved that FeWO_(4) was successfully compounded to g-C_(3)N_(4).Under visible light irradiation,pure g-C_(3)N_(4) and different ratios of FeWO_(4)/g-C_(3)N_(4) composite catalysts were studied for photocatalytic degradation of methylene blue.The results showed that FeWO_(4)/g-C_(3)N_(4) composite catalyst had better photocatalytic activity than pure g-C_(3)N_(4).When the composite ratio of FeWO_(4) was 50%,the degradation rate of methylene blue reached 87.3%,and the catalyst showed good recycle stability.Solid-state fluorescence and solid-state ultraviolet spectroscopy studies showed that the composite catalyst reduced the recombination of photo-generated carriers,narrowed band gap,and improved the utilization of visible light.

关 键 词：光催化 氮化碳 钨酸铁 亚甲基蓝 

分 类 号：O643.3[理学—物理化学] TB33[理学—化学]