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

作　　者：ZHAO Weifeng HAO Ning ZHANG Gai MA Aijie CHEN Weixing ZHOU Hongwei YANG Dong XU Ben Bin KONG Jie 

机构地区：[1]School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an 710021,R R.China [2]Department of Applied Chemistry,School of Science,Northwestern Polytechnical University,Xi’an 710072,P.R.China [3]Department of Mechanical and Construction Engineering,Faculty of Engineering and Environment,Northumbria University,Newcastle upon Tyne,NE18ST,UK

出　　处：《Chemical Research in Chinese Universities》2020年第6期1265-1271,共7页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos.61604120,51603164);the Natural Science Foundation of Shaanxi Province,China(No.2019JM-527);the Natural Science Basic Research Plan in Shaanxi Province,China(No.2018JC-008);the Key Research and Development Plan for Industry Innovation Chain(Cluster)of Shaanxi Province,China(No.2018ZDCXL-GY-09-07).

摘　　要：An in sitt 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@a Urea co-crystals,C guest species were generated and compounded into g-C3Na 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-C3Na(C/g-C3Na)was notably improved.Up to 99%of methylene blue(MB)was eliminated within 60 min by the optima sample 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 of g-C3Na,which holds great potential concerning the degradation of organic dyes from water.

关 键 词：Graphitic carbon nitride Carbon composite PHOTOCATALYSIS PHOTODEGRADATION 

分 类 号：O64[理学—物理化学]