Sun Yayong, Wang Fupeng, Fu Yunlei, Chen Chao, Wang Xuanyi, Xiao Zhenyu, Liu Yanru, Xu Jixiang, Li Bin, Wang Lei
Key Laboratory of Eco-chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology Qingdao 266042 P. R. China
State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Mater, Chinese Academy of Sciences Fuzhou Fujian 350002 P. R. China.
RSC Adv. 2020 Jan 3;10(2):812-817. doi: 10.1039/c9ra06919d. eCollection 2020 Jan 2.
Two novel inorganic-organic hybrid zinc phosphites, namely, [Zn(1,2-bimb)(HPO)] (1) and [Zn(1,4-bmimb)(HPO)] (2), (1,2-bimb = 1,2-bis(imidazol-1ylmethyl)benzene; 1,4-bmimb = 1,4-bis((2-methyl-1-imidazol-1yl)methyl)benzene) were synthesized for the first time by hydrothermal reaction. Compound 1 generates a three-dimensional (3D) pillared-layer structure with a 2-nodal 3,4-connected topology. While compound 2 exhibits a 2D hybrid zinc phosphite sheet with a 3,4-connected topology network. Utilizing compound 1 and compound 2 as templates and NaS as an etching agent, a series of highly efficient ZnO/ZnS photocatalysts were obtained. The optimized 1-160 sample demonstrates the highest evolution rate of 22.6 mmol g h, exceeding the rate of commercial ZnS samples by more than 14.5 times. The remarkable photocatalytic activity should be attributed to the unique heterojunction structure which shortens the free path of charge carriers and enhances the charge separation efficiency. This work provides a facile strategy for preparing photocatalysts with efficient photocatalytic hydrogen production derived from inorganic-organic hybrid material.
首次通过水热反应合成了两种新型无机-有机杂化亚磷酸锌，即[Zn(1,2-bimb)(HPO)] (1)和[Zn(1,4-bmimb)(HPO)] (2)，(1,2-bimb = 1,2-双(咪唑-1-基甲基)苯；1,4-bmimb = 1,4-双((2-甲基-1-咪唑-1-基)甲基)苯)。化合物1生成具有2节点3,4连接拓扑结构的三维(3D)柱状层结构。而化合物2呈现出具有3,4连接拓扑网络的二维杂化亚磷酸锌片层。以化合物1和化合物2为模板，以NaS为蚀刻剂，制备了一系列高效的ZnO/ZnS光催化剂。优化后的1-160样品表现出最高的产氢速率，为22.6 mmol g h，比市售ZnS样品的速率高出14.5倍以上。这种显著的光催化活性应归因于独特的异质结结构，该结构缩短了电荷载流子的自由程并提高了电荷分离效率。这项工作为制备由无机-有机杂化材料衍生的具有高效光催化产氢性能的光催化剂提供了一种简便的策略。
