Fe_(3)O_(4)/SiO_(2)/P25的超声制备及对罗丹明B降解特性  

Ultrasonic preparation of Fe_(3)O_(4)/SiO_(2)/P25 and photocatalytic activity on RhB

作　　者：刘峥 何晓 蔡辉东 吴海霞 冯庆革 LIU Zheng;HE Xiao;CAI Hui-dong;WU Hai-xia;FENG Qing-ge(School of Resources Environment and Materials,Guangxi University,Nanning 530004,China;School of Environment and Energy,South China University of Technology,Guangzhou 510006,China)

机构地区：[1]广西大学资源环境与材料学院,广西南宁530004 [2]华南理工大学能源与环境学院,广东广州510006

出　　处：《应用化工》2021年第3期577-583,共7页Applied Chemical Industry

基　　金：国家重点研发计划(2018YFC1903201);广西石化资源加工及过程强化技术重点实验室开放基金(2018K007)。

摘　　要：采用超声法,以稻壳灰为硅源,P25为钛源,引入磁性纳米Fe_(3)O_(4),制备了Fe_(3)O_(4)/SiO_(2)/P25磁性光催化材料。通过FESEM、XRD、XPS、FTIR、TGA-DTA、VSM等对该复合材料的结构与形貌进行表征,研究了不同配比对罗丹明B(RhB)染料的光降解性能。结果显示,Fe_(3)O_(4)/SiO_(2)/P25复合材料中Fe_(3)O_(4)表面被中间层SiO_(2)包裹良好,形成了Si—O—Ti键,并显示出良好的磁分离效果。以m(Fe_(3)O_(4)/SiO_(2))∶m(P25)=0.3制备的复合材料光催化效果最佳,光催化降解RhB溶液的最佳pH=7,最佳初始浓度为10μmol/L,最佳投量为0.6 g/L,其最高降解率可达99.90%。Fe_(3)O_(4)/SiO_(2)/P25 magnetic photocatalysis materials were prepared by ultrasonic method,with the silicon source of rice husk ash,the titanium source of P25 and magnetic iron oxide.The characterization of the composite material were conducted by FESEM,XRD,XPS,FTIR,TGA-DTA,VSM.The photocatalysis effects of different ratio on the properties of materials were investigated,and its photodegradation reactivity was studied with RhB dye solution.The results indicated that the Fe_(3)O_(4)/SiO_(2)/P25 was double coated with SiO_(2) mesosphere,formed the Si—O—Ti bond,and shown magnetic separation effect perfectly.m(Fe_(3)O_(4)/SiO_(2))∶m(P25)=0.3 was the optimum ratio of preparation.The photodegradation results showed that the optimum condition was the pH=7,10μmol/L of the initial concentration of RhB solution,0.6 g/L of the dosage,respectively.The maximum degradation rate reached 99.90%.

关 键 词：Fe 3O 4/SiO 2/P25 超声合成 光催化 磁分离 

分 类 号：TQ426[化学工程] X131.2[环境科学与工程—环境科学]