煅烧温度对Pr_(6)O_(11)@C光催化性能的影响  

Effect of Calcination on Photocatalytic Efficiency of Pr_(6)O_(11)@C

作　　者：谭贺云 孙巧萍 肖忠连 郝仕油[1] Tan Heyun;Sun Qiaoping;Xiao Zhonglian;Hao Shiyou(Xingzhi College,College of Chemistry and Life Sciences,Zhejiang Normal University,Jinhua 321004,China)

机构地区：[1]浙江师范大学行知学院生化学院,浙江金华321004

出　　处：《中国稀土学报》2022年第5期770-777,共8页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(21876158)资助。

摘　　要：以Pr(NO_(3))_(3)·6H_(2)O和酸性红14(AR14)为原料,利用NH_(3)·H_(2)O做沉淀剂,使Pr^(3+)和AR14共沉积生成Pr(OH)_(3)@AR14,通过在惰性气体中煅烧获得Pr_(6)O_(11)@C。利用X射线衍射(XRD),扫描电镜(SEM),傅里叶转换红外光谱(FT-IR),紫外-可见光谱(UV-vis),X射线光电子能谱(XPS),荧光光度计(PL)等手段考察了煅烧温度对Pr_(6)O_(11)@C光催化效率的影响。结果表明,600℃煅烧合成产物的光催化效率高于450和700℃煅烧合成产物的,因为600℃煅烧合成产物光吸收效果好、表面羟基含量高、氧空位和碳键数量多,利于提高有机污染物吸附量,增加光生电子与空穴产率及其分离效率。Using Pr(NO_(3))_(3)·6H_(2)O and acid red 14(AR14)as raw materials,NH_(3)·H_(2)O as precipitant,Pr(OH)_(3)@AR14 was formed via codeposition of Pr^(3+)and AR14,and Pr_(6)O_(11)@C was obtained by calcination of Pr(OH)_(3)@AR14 in inert gas system.Effect of calcination temperature on the photocatalytic efficiency of Pr_(6)O_(11)@C was investigated by XRD,SEM,FT-IR,UV-vis,XPS,and PL techniques.The results show that the photocatalytic efficiency of Pr_(6)O_(11)@C calcinated at 600℃is higher than those calcined at 450 and 700℃because Pr_(6)O_(11)@C calcinated at 600℃possesses better light absorption,higher surface hydroxyl content,more oxygen vacancies and carbon bonds,resulting in improvement of the adsorption capability of organic pollutant,the yield and separation efficiency of photoelectrons and holes.

关 键 词：煅烧温度 Pr_(6)O_(11)@C 碳键 光催化 AR14 

分 类 号：O614.13[理学—无机化学] TF123.7[理学—化学]