Graphitic carbon nitride(g-C_(3)N_(4))as a metal-free candidate of photocatalyst has received worldwide attention because of its great potentials in solar light-induced degradation and hydrogen evolution,yet the indus...Graphitic carbon nitride(g-C_(3)N_(4))as a metal-free candidate of photocatalyst has received worldwide attention because of its great potentials in solar light-induced degradation and hydrogen evolution,yet the industrial application is seriously hindered by the small specific surface area and rapid recombination rate of carriers.Herein,we demonstrate that porous g-C_(3)N_(4)(HCl-CNU-X)can be prepared via the copolymerization of acidified melamine and a green bubble template(urea).Transmission electron microscopy and nitrogen sorption characterization results show that the prepared HCl-CNU-X possesses an in-plane porous structure and large specific surface area,enabling the exposure of more accessible active sites.As a result,HCl-CNU-X exhibits both enhanced photocatalytic tetracycline hydrochloride degradation and higher hydrogen evolution than bulk g-C_(3)N_(4).The boosted photocatalytic performance was ascribed to the formation of the porous structure,which dramatically promotes the separation of charge-carriers and facilitates the electron transfer.This work demonstrates that the acidification of nitrogen-rich precursors combined with a bubble-template can develop a new paradigm of highly porous photocatalysts for environmental remediation and water splitting.展开更多
基金the National Science and Technology Major Project(No.2016ZX05040003)Shuaijun Wang thanks the China Scholarship Council Scholarship(No.201806450064)。
文摘Graphitic carbon nitride(g-C_(3)N_(4))as a metal-free candidate of photocatalyst has received worldwide attention because of its great potentials in solar light-induced degradation and hydrogen evolution,yet the industrial application is seriously hindered by the small specific surface area and rapid recombination rate of carriers.Herein,we demonstrate that porous g-C_(3)N_(4)(HCl-CNU-X)can be prepared via the copolymerization of acidified melamine and a green bubble template(urea).Transmission electron microscopy and nitrogen sorption characterization results show that the prepared HCl-CNU-X possesses an in-plane porous structure and large specific surface area,enabling the exposure of more accessible active sites.As a result,HCl-CNU-X exhibits both enhanced photocatalytic tetracycline hydrochloride degradation and higher hydrogen evolution than bulk g-C_(3)N_(4).The boosted photocatalytic performance was ascribed to the formation of the porous structure,which dramatically promotes the separation of charge-carriers and facilitates the electron transfer.This work demonstrates that the acidification of nitrogen-rich precursors combined with a bubble-template can develop a new paradigm of highly porous photocatalysts for environmental remediation and water splitting.
