Br-掺杂Bi2WO6的水热法合成及其可见光催化性能

摘要

Br-ions doped Bi2WO6 was prepared using bismuth nitrate Bi(NO3)3· 5H2O and sodium tungstate Na2WO4· 2H2O as raw materials by hydrothermal synthesis method.The effect of Br-doping on the phase structure,morphology and visible light catalytic properties of Bi2WO6 was investigated using XRD,SEM,TEM,XPS,Raman,PL and DRS.The results indicated that the visible-light-driven photocatalytic performance of Bi2WO6 was greatly enhanced after Br-doping.When Br-was doped with 8％ of the amount (percentage of amount of substance),the Bi2WO6 photocatalyst displayed the best photocatalytic performance.It could decompose 96.73％ RhB after 40 minutes irradiation,which was 36.32％ higher than that of the pristine one.%以Bi(NO3)3·5H2O和Na2WO4·2H2O为主要原料,采用水热法合成了纯相Bi2WO6,并对其进行非金属离子Br-掺杂改性.采用XRD、SEM、TEM、XPS、Raman、PL和DRS研究了Br-掺杂对Bi2WO6的物相结构、形貌和可见光催化性能的影响.结果表明,Br掺杂可有效提高Bi2WO6的可见光催化性能,当掺杂量(物质的量百分数)为8％时,溴掺杂Bi2WO6的光催化性能最好,可见光照射40 min后,可降解96.73％的罗丹明-B,与未掺杂Bi2WO6相比,其降解率提高了36.32％.