酸化法制备g-C_3N_4纳米片及其光催化性能研究  

Preparation and Photocatalytic Activity of g-C_3N_4 Nanosheets by Acidification

作　　者：杨薛峰 马涛[1,2] 申倩倩 薛晋波[2,3] 贾虎生 YANG Xue-feng＇,;MA Tao＇,;SHEN Qian-qian;XUE Jin-bo;JIA Hu-sheng＇,(College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;Key Laboratory of Interface Science and Engineering in Advanced Materials （Taiyuan University of Technology） , Ministry of Education, Taiyuan 030024, China;Research Centre of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]太原理工大学新材料界面科学与工程教育部重点实验室,太原030024 [3]太原理工大学新材料工程技术研究中心,太原030024

出　　处：《人工晶体学报》2018年第4期703-708,714,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51402209);山西省基础研究项目(2015021075;201601D102020;201603D121017);山西省科技攻关计划项目(20140321012-01);山西省高校科技创新研究项目(2016124);太原理工大学校基金(2015MS046)

摘　　要：通过热缩聚三聚氰胺前驱体制备得到块状g-C_3N_4(b-CN),再利用酸化法超声剥离b-CN制得g-C_3N_4纳米片。采用扫描电子显微镜、透射电子显微镜、X射线衍射仪、溶液吸附法等对样品的微观形貌、晶体结构以及比表面积等进行分析,并测试了其光催化性能。结果表明,当HNO_3浓度为2 M时,制得g-C_3N_4纳米片(CN-N-2)的比表面积最大,可达161.2 cm^2/mg;且其光催化性能最佳。这是因为酸化法处理后制得的纳米片比表面积增大,表面活性位点增多。g-C3N4 nanosheets were prepared by ultrasonication assisted nitric acid exfoliation method from bulk g-C3N4（ b-CN）,which was prepared by thermal polymerization of melamine. The obtained products were characterized by SEM, TEM, XRD and solution adsorption method. And the photocatalytic performance of samples was investigated. The results exhibit that when the concentration of HNO3 was 2 M,the g-C3N4 nanosheets（ CN-N-2） had a special surface area of 161. 2 cm^2/mg,and show the best photocatalytic activity. The enhanced photocatalytic performance is attributed to the increased active sites of the nanosheets owing to the increased specific surface area after acid treatment.

关 键 词：g-C3N4 酸化法 光催化 比表面积 

分 类 号：O643[理学—物理化学]