Metalloporphyrinic metal-organic framework (PCN-222) is a promising photocatalytic material due to its large surface area and 1D channel, exceptional stability, high visible-light capture capability, and semiconductor properties. Herein, we constructed a highly efficient visible-light-driven type II heterojunction photocatalyst PCN-222-PW 12 /TiO 2 by one step solvothermal method. The 5 wt% PCN-222-PW 12 /TiO 2 showed the superior photocatalytic properties for degrading rhodamine B (RhB) and Ofloxacin, which are 10.69 and 10.48 times higher than pure TiO 2 under same conditions. The excellent photocatalytic performance of PCN-222-PW 12 /TiO 2 ternary composite material was attributed to the improved adsorption capacity of organic pollutants, optical absorption in the entire visible light region, and highly-efficient separation of photoinduced carriers. Besides, we found that h + , O 2 − , and OH are the main active elements in the photocatalytic degradation process. This will back up the higher photocatalytic activity of PCN-222-PW 12 /TiO 2 compared with pure TiO 2 . The photocatalytic efficiency of composite maintained a similar level of photoactivity after four times recovery, which showed excellent stability and recyclability of PCN-222-PW 12 /TiO 2 . This work provides new insights into the fabrication porphyrin-MOF composite materials with high photocatalytic efficiency for environmental remediation.
H 3 PW 12 O 40 /TiO 2 (abbreviated PW 12 /TiO 2 ) nanofibers catalysts have been successfully prepared via calcinating off the respective electrospun PVP/[PW 12 + Ti(OC 4 H 9 ) 4 ] composite nanofibers for the first time and they show ultra-deep desulfurization catalytic performance in mild conditions. PW 12 /TiO 2 nanofibers consist of anatase phase TiO 2 and Keggin structure PW 12 , the diameter of which is approximately 100 nm. Compared with PW 12 /TiO 2 nanoparticles, 40 wt.% PW 12 /TiO 2 nanofibers (the weight percentage of PW 12 loading on TiO 2 nanofibers was 40%) exhibited the higher catalytic activity under the same conditions. DBT could be removed completely within 30 min at 70 °C using 0.02 g 40 wt.% PW 12 /TiO 2 nanofibers as catalysts, when ionic liquid (IL) [Bmim]PF 6 was as extraction agent. Additionally, sulfur removal of different substrates decreased in the following orders: DBT > BT > 4,6-DMDBT under the same conditions. Even after 5-times recycling, the catalytic activity of 40 wt.% PW 12 /TiO 2 nanofibers was not significant decreased. As a total result, these novel PW 12 /TiO 2 nanofibers can be used to deeply desulfurize in the industry.
危险品化学品经营许可证（带存储）