Design Of Aza-CMP/AuPd Hybrid Nanostructures And Their Performance In Light-driven Catalytic Reactions

Due to the upcoming energy crisis,efficient catalytic systems with low energy consumption become more and more important.In this case,it is one of the promisingsolutions to reduce the input of external energy by effectively utilizing incident solar energy as a heat source in the catalytic reaction process.To implement this strategy,the development of photothermal materials capable of efficiently absorbing sunlight and maximizing it into heat energy has become a top priority.Conjugated microporous polymers(CMPs)stand out in a group of photothermal materials because of their low cost,non-toxicity,environmental friendliness and good chemical stability,which has become a hot research topic.However,bare microporous polymer as a catalyst has the following bottlenecks:i)there are many kinds of conjugated microporous polymers,but conjugated microporous polymers with broad-spectrum absorption characteristics have to be discovered;ii)the vast majority ofconjugated microporous polymer does not have catalytic activity.These obstacles prevent the direct application of conjugated microporous polymers inlight-driven catalytic reactions.In this work,aza-fused ?-conjugated microporous polymer(aza-CMP)with broad light absorption and high photothermal conversion efficiency was synthesized and utilized as a support for bimetallic AuPd nanocatalysts in light-driven benzyl alcohol oxidation.The AuPd nanoparticles anchoredon aza-CMP(aza-CMP/AuxPdy)exhibited excellent catalytic performance for benzyl alcohol oxidation under 50 mW/cm2 light irradiation.The improved catalytic performance by the aza-CMP/AuxPdy is attributed to the unique photothermal effect induced by aza-CMP,which can promote the catalytic benzyl alcohol oxidation occurring at AuPd.This work presents a novel approach to effectively utilize solar energy for conventional catalytic reactions through photothermal effect.