首页|Carbon dot-based artificial light-harvesting systems with sequential energy transfer and white light emission for photocatalysis
Carbon dot-based artificial light-harvesting systems with sequential energy transfer and white light emission for photocatalysis
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In this work,we designed and synthesized cationic carbon dots(CDs)with a size distribution of 1.6-3.7 nm,which exhibited dark blue fluorescence in the aqueous solution.Based on its excellent lumi-nescence properties,we used it as an energy donor to construct a sequential artificial light-harvesting system(LHS)by employing the energy-matching dyes eosin Y disodium salt(EY)and sulforhodamine 101(SR101),which could regulate the white light emission(Commission Internationale de l'Eclairage(CIE)coordinate:(0.30,0.31))with the energy transfer efficiency(ΦET)of 53.9％and 20.0％.Moreover,a single-step artificial LHS with white light emission(0.32,0.28)can be constructed directly using CDs and dye solvent 43(SR)with ΦET and antenna effect(AE)of 48.8％and 6.5,respectively.More importantly,CDs-based artificial LHSs were firstly used in photocatalytic of α-bromoacetophenone,with a yield of 90％.This work not only provides a new strategy for constructing CDs-based LHSs,but also opens up a new application for further applying the energy harvested in CDs-based LHSs to the field of the aqueous solution photocatalysis.
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