高等学校化学研究 ›› 2020, Vol. 36 ›› Issue (6): 1091-1096.doi: 10.1007/s40242-020-0302-0
LUO Teng, HUANG Jianfeng, LIU Junmin
LUO Teng, HUANG Jianfeng, LIU Junmin
摘要: A series of novel calix[4]arene metal-free dyes, featuring macrocyclic structure and unique conical conformation, has been introduced into photoanode-based dye-sensitized electrochemical cell system as photosensitizers. The electrochemical properties of the corresponding sensitized photoanodes were systematically studied in the absence/presence of water oxidation catalyst(WOC). Furthermore, the visible-light-driven overall water-splitting reactions were conducted by fully assembled devices, obtaining a performance trend of Calix-3 > Calix-2 > Calix-1. The corresponding device of Calix-3 exhibited the best photoactivity, giving an initial photocurrent density of ca. 300 μA/cm2, an IPEC peak value of ca. 9.0% at 365 nm and a wide photo-respond band up to ca. 620 nm. The best performance of Calix-3 can be attributed to its most effective light-harvesting ability, best ICT transition property, highest oxidation potential and thus best ability of activating WOC. This work offers an inspiration for the application of new-type effective metal-free sensitizers in photocatalytic water-splitting device.