LIN Shengfeng 1,2
(1. Fujian Academy of Building Research Co., Ltd, Fuzhou 350025, Fujian, China; 2. Fujian Provincial Key Laboratory of Green Building Technology, Fuzhou 350025, Fujian, China)
Abstract: The crystallinity and thickness of ZIF-67 can be regulated by controlling the template, resulting in macroporous ZIF-67 single crystals and ultrathin derivatives. The influence of Ni2+ on photocatalytic efficiency and selectivity of CO was also studied in the photocatalytic reduction of CO2. It is found that the microporous ZIF-67 single crystals have a CO productivity of 3502.5 μmol·h-1· g-1, while the ZIF-67-derived ultrathin polymers exhibit largely increased productivity of 5380.0 μmol·h-1 ·g-1. The high photocatalytic activity of the polymers may be related to their weak crystalline and ultra-thin structure, thus possessing more exposed crystal planes and active sites. In addition, loading of Ni2+ has no effect on the efficiency of CO2 reduction, while an appropriate increase in the content of Ni2+ within a certain limit increases the selectivity of CO producvity.
Key words: macroporous ZIF-67; derivatative; ultrathin 2D structure; photocatalytic CO2 reduction