In situ Carbon Modification of g-C3N4 from Urea Co-crystal with Enhanced Photocatalytic Activity Towards Degradation of Organic Dyes Under Visible Light

TY - JOUR

T1 - In situ Carbon Modification of g-C3N4 from Urea Co-crystal with Enhanced Photocatalytic Activity Towards Degradation of Organic Dyes Under Visible Light

AU - ZHAO , Weifeng

AU - HAO , Ning

AU - ZHANG , Gai

AU - Aijie, MA

AU - CHEN , Weixing

AU - ZHOU , Hongwei

AU - YANG , Dong

AU - XU, BEN BIN

AU - Kong, Jie

PY - 2020/5/20

Y1 - 2020/5/20

N2 - An in situ strategy was introduced for synthesizing carbon modified graphitic carbon nitride(g-C3N4) by using urea/4-aminobenzoic acid(PABA) co-crystal(PABA@Urea) as precursor materials. Via co-calcination of the PABA co-former and the urea in PABA@Urea co-crystals, C guest species were generated and compounded into g-C3N4 matrix in situ by replacing the lattice N of the carbon nitride and forming carbon dots onto its layer surface.The carbon modification dramatically enhanced visible-light harvesting and charge carrier separation. Therefore,visible light photo-catalytic oxidation of methylene blue(MB) pollution in water over the carbon modified g-C3N4(C/g-C3N4) was notably improved. Up to 99% of methylene blue(MB) was eliminated within 60 min by the optimalsample prepared from the PABA@Urea co-crystal with a PABA content of 0.1%(mass ratio), faster than the degrada-tion rate over bare g-C3N4. The present study demonstrates a new way to boost up the photocatalysis performance ofg-C3N4, which holds great potential concerning the degradation of organic dyes from water.

AB - An in situ strategy was introduced for synthesizing carbon modified graphitic carbon nitride(g-C3N4) by using urea/4-aminobenzoic acid(PABA) co-crystal(PABA@Urea) as precursor materials. Via co-calcination of the PABA co-former and the urea in PABA@Urea co-crystals, C guest species were generated and compounded into g-C3N4 matrix in situ by replacing the lattice N of the carbon nitride and forming carbon dots onto its layer surface.The carbon modification dramatically enhanced visible-light harvesting and charge carrier separation. Therefore,visible light photo-catalytic oxidation of methylene blue(MB) pollution in water over the carbon modified g-C3N4(C/g-C3N4) was notably improved. Up to 99% of methylene blue(MB) was eliminated within 60 min by the optimalsample prepared from the PABA@Urea co-crystal with a PABA content of 0.1%(mass ratio), faster than the degrada-tion rate over bare g-C3N4. The present study demonstrates a new way to boost up the photocatalysis performance ofg-C3N4, which holds great potential concerning the degradation of organic dyes from water.

U2 - 10.1007/s40242-020-0073-7

DO - 10.1007/s40242-020-0073-7

M3 - Article

JO - Chemical Research in Chinese Universities

JF - Chemical Research in Chinese Universities

SN - 1005-9040

ER -