Pt NPs增强ZnO@ZnS核-壳异质纳米棒光催化产氢性能研究  

Synthesis of ZnO@ZnS/Pt core-shell heterogeneous nanorod photocatalyst and study on its performance in photocatalytic hydrogen production

作　　者：朱泉雯[1,2] 任华娟 刘学方 张军 陈铭[3] 侯建华 ZHU Quan-wen;REN Hua-juan;LIU Xue-fang;ZHANG Jun;CHEN Ming;HOU Jian-hua(School of Resources and Environmental Engineering,Yangzhou Polytechnic College,Yangzhou 225000,China;Jiangsu Provincial Engineering Research Center of Safety&Environment Technology and Equipment for Planting and Breeding Industry,Yangzhou 225009,China;School of Chemistry&Chemical Engineering,Yangzhou University,Yangzhou 225002,China;College of Environmental Science and Engineering,Yangzhou University,Yangzhou 225000,China)

机构地区：[1]扬州市职业大学资源与环境工程学院,江苏扬州225000 [2]江苏省种植养殖业安全环境技术及装备工程研究中心,江苏扬州225009 [3]扬州大学化学化工学院,江苏扬州225002 [4]扬州大学环境科学与工程学院,江苏扬州225000

出　　处：《现代化工》2024年第11期215-222,共8页Modern Chemical Industry

基　　金：江苏省高等学校优秀科技创新团队项目(苏教科[2021]1号);江苏省种植养殖业安全环境技术及装备工程研究中心项目(苏发改高支发[2020]1460号);扬州市职业大学优秀青年骨干教师培养项目(2021年);江苏高校“青蓝工程”项目(苏教师函[2021]11号)。

摘　　要：采用原位光沉积方法将铂纳米颗粒(Pt NPs)负载在核-壳异质纳米棒ZnO@ZnS表面,制备出ZnO@ZnS/Pt复合光催化剂。调控Pt NPs在ZnO@ZnS表面的负载量,探究了不同质量的Pt NPs对光催化产氢气性能的影响。结果表明,当贵金属Pt的负载量为2%(ZnO@ZnS/Pt-2)时,复合光催化产H_(2)性能最好,产氢速率为4.52 mmol/(g·h),是ZnO@ZnS的1.8倍,催化剂表现出优异的催化稳定性。在此复合材料中,贵金属Pt纳米颗粒作为助催化剂,Pt对H~+具有较低的吸附能,优先吸附H~+,光生电子转移到Pt纳米粒子表面,H^(+)在其表面得到光生电子,被还原为氢气,成功地抑制了光生电子和空穴的复合,有效地提升了催化剂的催化性能。ZnO@ZnS/Pt composite photocatalyst is synthesized through loading Pt nanoparticles on the surface of ZnO@ZnS core-shell nanorods via in-situ photo-deposition method.The loading amount of Pt nanoparticles on the surface of ZnO@ZnS is adjusted to investigate the influence on the performance of ZnO@ZnS/Pt composite photocatalyst in photocatalytic hydrogen production.Experimental results show that the hydrogen production performance of composite photocatalysis reaches the best when the composite photocatalyst with a Pt loading amount of 2%(ZnO@ZnS/Pt-2)is served.The hydrogen production rate is 4.52 mmol·g^(-1)·h^(-1),which is 1.8 times that over [e-mail] composite photocatalyst also shows excellent catalytic stability.Pt nanoparticles are used as cocatalyst in this composite photocatalyst.Pt needs low adsorption energy for H+and adsorbs H^(+)preferentially.Photogenerated electrons are transferred to the surface of Pt nanoparticles,and H+is reduced to hydrogen by electrons on its surface,which effectively inhibits the recombination of photogenerated electrons and holes,and improves the catalytic performance of the composite catalyst.

关 键 词：ZnO@ZnS核-壳纳米棒 Pt助催化剂 复合光催化剂 光催化产氢 产氢性能 

分 类 号：O64733[理学—物理化学]