A facile and effective impregnation combined with photo-deposition approach was adopted to deposit cadmium sulfide(CdS)nanoparticles on CTF-1,a covalent triazine-based frameworks(CTFs).In this system,CTF-1 not only ac...A facile and effective impregnation combined with photo-deposition approach was adopted to deposit cadmium sulfide(CdS)nanoparticles on CTF-1,a covalent triazine-based frameworks(CTFs).In this system,CTF-1 not only acted as supporter but also served as photocatalyst and electron donor.The performance of the obtained CdS deposited CTF-1(CdS-CTF-1)nanocomposite was evaluated by H2 evolution reaction under visible light irradiation.As a result,CdS-CTF-1 exhibited high H2 production from water,far surpassing the Cd S/CTF-1 nanocomposite,in which Cd S was deposited via solvothermal method.The high activity of CdS-CTF-1 was attributed to the confined Cd S nanoparticles with small size,leading to expose more active sites.In addition,time-resolved spectroscopy indicated that the superior performance of Cd S-CTF-1 also can be ascribed to the fast electron transfer rate and injection efficiency(KET=0.18×10^9 s^-1,ηinj=39.38%)between Cd S and CTF-1 layers,which are 3.83 times faster and 4.84 times higher than that of Cd S/CTF-1 nanocomposite.This work represents the first example on using covalent organic frameworks(COFs)as a support and electron-donor for fabricating novel Cd S-COF nanocomposite system and its potential application in solar energy transformations.展开更多
基金financially supported by the National Natural Science Foundation of China(51938007,51878325,51868050,51622806 and 51868052)the Natural Science Foundation of Jiangxi Province(20162BCB22017,20165BCB18008,20171ACB20017,and 20171BAB206049)+1 种基金the Ph.D.research startup foundation of Nanchang Hangkong University(EA201802367)the foundation of Jiangxi Scientific Committee(DA201902167)for financial support.
文摘A facile and effective impregnation combined with photo-deposition approach was adopted to deposit cadmium sulfide(CdS)nanoparticles on CTF-1,a covalent triazine-based frameworks(CTFs).In this system,CTF-1 not only acted as supporter but also served as photocatalyst and electron donor.The performance of the obtained CdS deposited CTF-1(CdS-CTF-1)nanocomposite was evaluated by H2 evolution reaction under visible light irradiation.As a result,CdS-CTF-1 exhibited high H2 production from water,far surpassing the Cd S/CTF-1 nanocomposite,in which Cd S was deposited via solvothermal method.The high activity of CdS-CTF-1 was attributed to the confined Cd S nanoparticles with small size,leading to expose more active sites.In addition,time-resolved spectroscopy indicated that the superior performance of Cd S-CTF-1 also can be ascribed to the fast electron transfer rate and injection efficiency(KET=0.18×10^9 s^-1,ηinj=39.38%)between Cd S and CTF-1 layers,which are 3.83 times faster and 4.84 times higher than that of Cd S/CTF-1 nanocomposite.This work represents the first example on using covalent organic frameworks(COFs)as a support and electron-donor for fabricating novel Cd S-COF nanocomposite system and its potential application in solar energy transformations.
