ZnO/Fe^(3+)复合纳米材料的制备及其光催化降解性能研究  

Preparation of ZnO/Fe^(3+) Nano Composite Material and its Photocatalytic Degradation Activity

作　　者：荣华[1] 王诗雨 卢春柳 燕秋辰 吴晓敏 林世静[1] 佟拉嘎[1] RONG Hua;WANG Shiyu;LU Chunliu;YAN Qiuchen;WU Xiaomin;LIN Shijing;TONG Laga(College of New Materials and Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院新材料与化学工程学院,北京102617

出　　处：《北京石油化工学院学报》2022年第3期6-12,共7页Journal of Beijing Institute of Petrochemical Technology

基　　金：北京市教委科技计划面上项目(SQKM201410017004);北京石油化工学院本科生科技创新计划资助项目(2022J00031)。

摘　　要：以ZnSO_(4)、NH_(4)HCO_(3)、Fe_(2)(SO_(4))_(3)为反应物,采用共沉淀法制备了0.0%~4.6%掺杂量的Fe^(3+)-ZnO微/纳米复合材料,通过XRD、FSEM、BET、EDS等分析手段对产物进行表征。以掺杂微/纳米材料为光降解催化剂对甲基橙稀溶液进行光催化降解实验研究,探究焙烧温度(200~400℃)与Fe^(3+)掺杂量对材料光催化性能的影响。结果表明,焙烧温度对材料光催化性能影响不大,而Fe^(3+)掺杂量对光催化性能影响显著。焙烧温度为300℃、Fe^(3+)掺杂量为0.40%时粉体颗粒分布最小,比表面积达到了71.9 m^(2)/g,光催化降解效果最佳,紫外光下150 min内光降解率达96.1%,自然光下6 h光降解率达97.4%。同时,对掺杂Fe^(3+)-ZnO微/纳米粉体光催化活性提高机制进行了分析。Using ZnSO_(4),NH_(4)HCO_(3),Fe_(2)(SO_(4))_(3) as reactants,ZnO:Fe^(3+) micro/nano composite materials with 0.0~4.6 wt% of Fe^(3+) dopant in ZnO were prepared by the co-precipitation method.The composites were characterized by multiple techniques including X-ray diffraction(XRD),field emission scanning electron microscopy(FSEM),specific surface area(BET),and energy-dispersive spectrum(EDS).The photocatalytic activity of Fe^(3+)-ZnO were evaluated in the degradation of the methyl orange solutions.The experimental results showed that the calcination temperature had little effect on the photocatalytic activity of Fe^(3+)-ZnO composites,but the Fe^(3+)doping ratio influenced significantly the photocatalytic efficiency.The Fe^(3+)-ZnO powders with well-distributed and uniform crystallites,which was obtained by calcining the 0.40 wt%Fe^(3+)-ZnO composites at 300℃,exhibited the highest efficiency.The degradation ratio reached 96.1%and 97.4%respectively for the 150 min UV light irradiation and 6 h natural daylight.The desirable efficiency could be attributed to the high specific surface area of Fe^(3+)-ZnO(71.9 m^(2)·g^(-1))and well-distributed crystallites.In addition,the mechanism for the photocatalytic reaction was briefly discussed.

关 键 词：Fe^(3)+掺杂微/纳米ZnO 光降解 催化活性 

分 类 号：O614.24[理学—无机化学] TQ426.8[理学—化学]