Serious energy shortage and environment pollution are becoming worldwide intractable problems. One of the best ways to settle these problems is to develop high efficiency photocatalysts for utilizing renewable solar energy to efficiently degrade pollutants. Besides the traditional transition metal oxide semiconductors, polymer photocatalyts have attracted much attention in recent years owing to their abundant sources, low cost, unique chemical stability and tunable structures.In this work, a novel 2D hybrid polymer photocatalyst black-MoO3/PI was synthesized by one-pot thermopolymerization of monomers, ammonium molybdate and thiourea at mild temperature. Thiourea and ammonium molybdate as fluxing agents promote the formation of black molybdenum oxide (BMO) on polyimide (PI) and enhance the crystallinity of PI. It is confirmed by XPS, EPR and FTIR that the strong interaction between BMO and PI leads to the formation of Mo-N coordination bond through the coordination of N atoms of heptazine units to the unsaturated Mo atoms of BMO and results in a large number of Mo5+ cations in BMO/PI. UV-vis and PL reveal that the visible light absorption of BMO/PI was increased and the separation efficiency of photogenerated electron/hole obviously was significantly enhanced, which facilitate the improvement of the photocatalytic activity of BMO/PI. Our work provides a new approach to synthesize efficient inorganic-organic hybrid semiconductor photocatalysts.

Constructing high-efficiency MoO3-polyimide hybrid photocatalyst based on strong interfacial interaction

2019 Spring National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.