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Photocatalytic CO2 Reduction Performances of Macroporous ZIF-67 and Its Ultrathin Derivatives

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

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[1] LIN Shengfeng. Photocatalytic CO2 Reduction Performances of Macroporous ZIF-67 and Its Ultrathin Derivatives [J]. Journal of Ceramics. 2020, 40(6): 925-934.
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