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Synergistic RGO/Black TiO2/2D‐ZIF‐8 Ternary Heterogeneous Composite with Highly Efficient Photocatalytic Activity
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-03-26 , DOI: 10.1002/slct.201904939 Jiahui He 1 , Jin Ye 1 , Yue Zhang 1 , Lingbo Kong 1 , Xuejian Zhou 1 , Yehui Ma 1 , Yongfang Yang 1
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-03-26 , DOI: 10.1002/slct.201904939 Jiahui He 1 , Jin Ye 1 , Yue Zhang 1 , Lingbo Kong 1 , Xuejian Zhou 1 , Yehui Ma 1 , Yongfang Yang 1
Affiliation
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A ternary heterogeneous composite combining reduced graphene oxide (RGO), black titanium dioxide (B−TiO2) nanosheets and two dimensional ZIF‐8 sheets (2D‐ZIF‐8) was prepared. Under hydrothermal condition, B−TiO2 nanosheets and GO were tightly bound together, and meanwhile GO was reduced to RGO. Upon mixing with poly (vinyl pyrrolidone) (PVP)‐modified 2D‐ZIF‐8, the RGO/B−TiO2/2D‐ZIF‐8 ternary composite was obtained by PVP binding between B−TiO2 and 2D‐ZIF‐8. The introduction of 2D‐ZIF‐8 endowed the ternary composite a good adsorption capability of contaminant and followed degradation in situ at the site of adsorption. Owing to synergistic catalysis of oxygen vacancy and the formation of double heterogeneous interfaces, the prepared ternary composite had good visible light adsorption and rapid charge separation rate, which improved the photocatalytic performance. The rate constant of photocatalytic degradation of doxycycline hydrochloride and methylene blue by RGO/B−TiO2/2D‐ZIF‐8 was determined to be 0.0118 and 0.0232 min−1, respectively, which are 2.68 and 3.3 times that of B−TiO2. This study could provide deep insight for the design of high and bi‐functional activity catalysts based on the assembly of two‐dimensional sheet.
中文翻译：
具有高效光催化活性的RGO /黑色TiO2 / 2D-ZIF-8异质三元复合材料
制备了一种三元异质复合材料，其中包括还原氧化石墨烯（RGO），黑色二氧化钛（B-TiO 2）纳米片和二维ZIF-8片（2D-ZIF-8）。在水热条件下，B-TiO 2纳米片和GO紧密结合在一起，同时GO还原为RGO。当与聚（乙烯基吡咯烷酮）混合（PVP）改性2D-ZIF-8，RGO / B-TIO 2 / 2D-ZIF-8，通过PVP之间的结合而获得的三元复合B-的TiO 2和2D-ZIF-8。2D-ZIF-8的引入使三元复合材料具有良好的污染物吸附能力，并随后在吸附部位就地降解。由于三价氧的协同催化作用和双异质界面的形成，所制备的三元复合材料具有良好的可见光吸附性能和快速的电荷分离速率，提高了光催化性能。RGO / B-TiO 2 / 2D-ZIF-8催化光催化降解盐酸多西环素和亚甲基蓝的速率常数分别为0.0118和0.0232 min -1，分别是B-TiO 2的2.68和3.3倍。这项研究可以为基于二维薄板组装的高活性和双功能活性催化剂的设计提供深刻的见识。
更新日期：2020-03-27
中文翻译：
具有高效光催化活性的RGO /黑色TiO2 / 2D-ZIF-8异质三元复合材料
制备了一种三元异质复合材料，其中包括还原氧化石墨烯（RGO），黑色二氧化钛（B-TiO 2）纳米片和二维ZIF-8片（2D-ZIF-8）。在水热条件下，B-TiO 2纳米片和GO紧密结合在一起，同时GO还原为RGO。当与聚（乙烯基吡咯烷酮）混合（PVP）改性2D-ZIF-8，RGO / B-TIO 2 / 2D-ZIF-8，通过PVP之间的结合而获得的三元复合B-的TiO 2和2D-ZIF-8。2D-ZIF-8的引入使三元复合材料具有良好的污染物吸附能力，并随后在吸附部位就地降解。由于三价氧的协同催化作用和双异质界面的形成，所制备的三元复合材料具有良好的可见光吸附性能和快速的电荷分离速率，提高了光催化性能。RGO / B-TiO 2 / 2D-ZIF-8催化光催化降解盐酸多西环素和亚甲基蓝的速率常数分别为0.0118和0.0232 min -1，分别是B-TiO 2的2.68和3.3倍。这项研究可以为基于二维薄板组装的高活性和双功能活性催化剂的设计提供深刻的见识。
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