PVP改性钛酸铋的制备及光催化性能研究  

Preparation and photocatalytic properties of PVP modified bismuth titanate

作　　者：康巧梅 郭怡珺 KANG Qiao-mei;GUO Yi-jun(School of life sciences and chemistry,Minnan Science and Technology Institute,Quanzhou 362332,China)

机构地区：[1]闽南科技学院生命科学与化学学院,福建泉州362332

出　　处：《云南民族大学学报（自然科学版）》2024年第4期464-471,共8页Journal of Yunnan Minzu University:Natural Sciences Edition

基　　金：闽南科技学院教改项目(MKJG-2022-008);福建省“大学生创新创业训练计划”项目(S201912992008).

摘　　要：以五水硝酸铋和钛酸四丁酯为原料,分别采用溶剂热合成法和共相沉淀法制备出不同铋钛摩尔比的钛酸铋,加入表面活性剂聚乙烯吡咯烷酮(PVP)对其进行改性.催化剂表征结果表明,PVP-Bi_(20)TiO_(32)为四方晶型,具有TiO_(6)八面体的特征峰,禁带宽度为1.38 eV.光催化活性实验表明,在PVP投加量为0.3 g,溶液体积比例为4∶1,在140℃的制备温度下反应16 h,在300℃的温度下煅烧2 h,所制得的光催化剂的活性最好.以500 W氙灯为光源,投加0.1 g PVP改性钛酸铋催化剂,降解100 mL 10 mg/L罗丹明B溶液,照射120 min,降解效果可达98%.Bismuth titanate with different molar ratio of bismuth to titanium was prepared from bismuth nitrate pentahydrate and tetrabutyl titanate by solvothermal synthesis and cophase precipitation respectively,and added the surfactant polyvinyl pyrrolidenone(PVP)to modify it.The characterization results of the catalyst showed that PVP-Bi_(20)TiO_(32)was square crystal with characteristic peak of TiO 6octahedron and band width was 1.38 eV.The experiment of photocatalytic activity showed that the photocatalyst prepared by adding 0.3 g PVP,4∶1 solution volume ratio,reacting for 16 h at 140℃and calcining for 2 h at 300℃had the best photocatalytic activity,using 500 W xenon lamp as light source,adding 0.1 g PVP modified bismuth titanate catalyst was added to degrade 100 mL rhodamine B solution with concentration of 10 mg/L,and by irradiation for 120 min,the degradation effect can reach 98%.

关 键 词：Bi_(20)TiO_(32) 溶剂热法 PVP 罗丹明B 光催化 

分 类 号：X52[环境科学与工程—环境工程]