离子共掺对钛酸锶光催化性能的影响  

Effect of ionic co-doping on photocatalytic performance of strontium titanate

作　　者：赵凯欣 赵子豪 王龙[1] 谈博文 田秀娟[1] ZHAO Kaixin;ZHAO Zihao;WANG Long;TAN Bowen;TIAN Xiujuan(College of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266590

出　　处：《山东科技大学学报（自然科学版）》2024年第4期92-99,共8页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：山东省科技型中小企业创新能力提升工程项目(SKDZK20230113)。

摘　　要：钛酸锶(SrTiO_(3))光催化剂是一种钙钛矿型氧化物,具有氧化还原能力强和环境友好的特点,在分解水制氢、有机污染物降解等领域得到广泛应用。通过水热法制备SrTiO_(3)光催化剂,并采用Pr/N共掺杂优化其能带结构。分析催化剂结构、形貌、比表面积和光催化析氢速率,以评估Pr/N共掺杂对SrTiO_(3)性能的影响。结果显示,与未掺杂的SrTiO_(3)相比,Pr/N-SrTiO_(3)的禁带宽度E g减小了0.3 eV;析氢速率为3.552 mmol·g^(-1)·h^(-1),提高62.3倍,且具有良好的循环稳定性。共掺杂离子Pr/N的存在延长了SrTiO_(3)的载流子寿命,提高了载流子的分离效率。SrTiO_(3)photocatalyst,as a kind of perovskite oxide,is featured by strong REDOX ability and environmental friendliness and has been widely used in the fields of hydrogen production by water decomposition and degradation of organic pollutants.The photocatalyst SrTiO_(3)was prepared by hydrothermal method and the band structure was optimized by Pr/N co-doping.The structure,morphology,specific surface area and photocatalytic hydrogen evolution rate of the catalyst were analyzed to evaluate the effect of Pr/N co-doping on the performance of SrTiO_(3).The results show that with the forbidden band width E g decreasing by 0.3 eV and the hydrogen precipitation rate increasing by 62.3 times to 3.552 mmol·g^(-1)·h^(-1),Pr/N-SrTiO_(3)has a better cyclic stability compared with undoped SrTiO_(3).The presence of co-doped ions,Pr/N,prolongs the lifetime of carriers and improves the separation efficiency of carriers in SrTiO_(3).

关 键 词：离子共掺 Pr/N-SrTiO_(3) SrTiO_(3) 光催化 制氢 

分 类 号：O643[理学—物理化学]