类石墨相氮化碳的制备及可见光催化性质研究  

Preparation of graphitic carbon nitride and its visible-light photoactivities

作　　者：王鹏[1] 高其乾 段良升 张学宇[1,2] 吕威[1,2] 

机构地区：[1]长春工业大学材料科学与工程学院,吉林长春130012 [2]长春工业大学材料科学高等研究院,吉林长春130012

出　　处：《长春工业大学学报》2016年第4期313-316,共4页Journal of Changchun University of Technology

基　　金：国家自然科学基金资助项目(61376020);吉林省自然科学基金资助项目(20130101009JC);长春市科技局基金资助项目(C2014030709MA)

摘　　要：利用两种廉价前驱体,通过热聚缩作用成功制备类石墨相氮化碳(g-C_3N_4),通过XRD,FT-IR测试验证了实验产物的物理化学性质。两种g-C_3N_4的光催化性能通过在可见光下降解Rh.B的性能进行评定。由尿素制备的g-C_3N_4在60min的光照条件下去除水中染料达到99%以上,而由硫脲制备的g-C_3N_4去除率不足50%。同时通过SEM、BET等测试对影响g-C_3N_4的光催化性能的因素进行对比讨论。尿素制备的g-C_3N_4呈现为纳米片层状,比表面积达到50m2/g,是硫脲制备的g-C_3N_4的2.78倍,由此可知,微观形貌以及比表面积是影响催化性能的重要因素。Graphite carbon nitride （g-C3 N4） is synthesized through thermopolymerization method with two cheap precursors. The physicochemical property of the products is studied by XRD and FTIR. The photocatalytic property of g-C3 N4 can be evaluated by Rh.B photodegradation under visible-light. The product g-C3N4 prepared by urea can remove 99% Rh.B from water under visible-light within 60 min, while the removal rate is less than 500~ for the g-C3 N4 prepared by thiourea. SEM and BET methods are used to analyze the influential factors on the photocatalytic property of g-C3 N4. The urea based g- C3N4 is with nano-sheet morphologies, specific surface area 50 m2/g which is 2.78 times of that thiourea based g-C3 N4. It comes to a conclusion that both the microtopography and the specific surface area are important factors influencing the photocatalytic property.

关 键 词：热聚缩 类石墨相氮化碳 光催化 比表面积 

分 类 号：O643[理学—物理化学] X703[理学—化学]