Wang, Xianbiao Liu, Jin Leong, Sookwan Lin, Xiaocheng Wei, Jing Kong, Biao Xu, Yongfei Low, Ze-Xian Yao, Jianfeng Wang, Huanting Rapid Construction of ZnO@ZIF‑8 Heterostructures with Size-Selective Photocatalysis Properties To selectively remove heavy metal from dye solution, inspired by the unique pore structure of ZIF-8, we developed a synthetic strategy for rapid construction of ZnO@ZIF-8 heterostructure photocatalyst for selective reduction of Cr­(VI) between Cr­(VI) and methylene blue (MB). In particular, ZnO@ZIF-8 core–shell heterostructures were prepared by in situ ZIF-8 crystal growth using ZnO colloidal spheres as template and zinc source within 8–60 min. The shell of the resulting ZnO@ZIF-8 core–shell heterostructure with a uniform thickness of around 30 nm is composed of ZIF-8 crystal polyhedrons. The concentration of organic ligand 2-methylimidazole (Hmim) was found to be crucial for the formation of ZnO@ZIF-8 core–shell heterostructures. Different structures, ZnO@ZIF-8 core–shell spheres and separate ZIF-8 polyhedrons could be formed by altering Hmim concentration, which significantly influences the balance between rate of Zn<sup>2+</sup> release from ZnO and coordinate rate. Importantly, such ZnO@ZIF-8 core–shell heterostructures exhibit size-selective photocatalysis properties due to selective adsorption and permeation effect of ZIF-8 shell. The as-synthesized ZnO@ZIF-8 heterostructures exhibited enhanced selective reduction of Cr­(VI) between Cr­(VI) and MB, which may find application in the dye industry. This work not only provides a general route for rapid fabrication of such core–shell heterostructures but also illustrates a strategy for selectively enhanced photocatalysis performance by utilizing adsorption and size selectivity of ZIF-8 shell. dye solution;ZIF;photocatalysis performance;zinc source;core;MB;ZnO;dye industry;pore structure;30 nm;permeation effect;Cr;Different structures;size selectivity;Rapid Construction;Hmim concentration;heterostructure;uniform thickness 2016-03-21
    https://acs.figshare.com/articles/journal_contribution/Rapid_Construction_of_ZnO_ZIF_8_Heterostructures_with_Size_Selective_Photocatalysis_Properties/3126334
10.1021/acsami.6b00028.s001