摘要
以硝酸铋、钨酸钠、硝酸铁为原料,采用水热合成法制备了铁掺杂的钨酸铋(Fe/Bi2WO6)纳米材料。通过X射线衍射(XRD)、扫描电镜(SEM)、X射线能谱(EDS)、X射线光电子能谱(XPS)、紫外-可见漫反射光谱(UV-Vis DRS)等手段对制备的材料进行结构表征及分析,并以罗丹明B为模拟污染物研究了样品的光催化性能。结果表明,在水热反应温度为160℃、水热反应时间为16 h、前驱液p H为1、铁掺杂量为5%(物质的量分数)条件下,制得的Fe/Bi2WO6样品结晶度高,主要是由薄片组成的花球状颗粒;以Fe/Bi2WO6为催化剂,在可见光照射1 h及双氧水助剂存在下,质量浓度为10 mg/L的罗丹明B溶液的光催化降解率可达99.5%,与纯钨酸铋(Bi2WO6)催化剂相比,罗丹明B溶液光催化降解率提高了近30%。
Fe-doped nano-sized bismuth tungstate（Fe/Bi2WO6） photocatalysts were synthesized via hydrothermal method using Bi（NO3）3,Na2WO4,and Fe（NO3）3as raw materials.XRD,SEM,EDS,XPS,and UV-vis DRS were employed to characterize and analyze the prepared samples.The sample′s photocatalytic properties were investigated by using Rh-B to simulate the pollutant.Results showed that,the optimum prepared conditions were found as follows： hydrothermal temperature was 160 ℃,hydrothermal time was 16 h,p H=1 for the precursor solution,Fe doping amount was 5%（amount-of-substance fraction）.The obtained samples owned high degree of crystallinity,which was mainly made up of spherical particles piled up by lots of flakes.After 1 h irradiation under visible light with the presence of H2O2,the samples showed relatively higher photocatalytic degradation rate of Rh-B by 99.5%,which increased by nearly 30% than what of the pure Bi2WO6.
出处
《无机盐工业》
CAS
北大核心
2016年第3期72-76,共5页
Inorganic Chemicals Industry
基金
国家自然科学基金资助项目(21063001)
广西教育厅立项项目(2013LX006)
广西大学大学生实验技能和科技创新能力训练基金资助项目(SYJN20130342)
关键词
铁掺杂
钨酸铋
水热法
光催化
Fe-doping
Bi2WO6
hydrothermal method
photocatalysis
