石墨相g-C3N4的制备及其可见光活性的影响因素

中国有色金属学报, 2016, 26(11): 2353-2362.

石墨相g-C3N4的制备及其可见光活性的影响因素

祝佳鑫 ^1, , 李志浩 ^2, , 周鹏 ^3, , 王辉虎 ^4, , 陈钊 ^5, , 彭大硌 ^6, , 芦佳 ^7, , 董仕节 ^8,

1.湖北工业大学机械工程学院,武汉,430068

2.湖北工业大学机械工程学院,武汉,430068

3.湖北工业大学机械工程学院,武汉,430068

4.湖北工业大学机械工程学院,武汉430068;湖北工业大学绿色轻工材料湖北省重点实验室,武汉430068

5.湖北工业大学机械工程学院,武汉,430068

6.湖北工业大学机械工程学院,武汉430068;湖北工业大学绿色轻工材料湖北省重点实验室,武汉430068

7.湖北工业大学机械工程学院,武汉430068;湖北工业大学绿色轻工材料湖北省重点实验室,武汉430068

8.湖北工业大学机械工程学院,武汉430068;湖北工业大学绿色轻工材料湖北省重点实验室,武汉430068

基金项目: Project(BSQD12119) supported by the Research Foundation for Talented Scholars of Hubei University of Technology,China 绿色轻工材料湖北省重点实验室开放基金资助项目([2013]2-22) Project(51202064) supported by the National Natural Science Foundation of China Project (2013CFA085) supported by the Natural Science Foundation of Hubei Province,China 湖北工业大学高层次人才启动基金资助项目(BSQD12119) 国家自然科学基金资助项目(51202064) 湖北省自然科学基金重点项目(2013CFA085) Project([2013]2-22) supported by Open Foundation of Hubei Provincial Key Laboratory of Green Materials for Light Industry,China

关键词： g-C3N4 , 甲基橙 , 尿素 , 二氰二胺 , 光催化

Preparation of g-C3N4 photocatalysts and influencing factors of its visible light activity

Keywords： g-C3N4 , methyl orange , urea , melamine , photocatalysis

利用二氰二胺与尿素的复合粉末作为前驱体,通过简单的高温烧结法制备石墨相g-C3N4光催化剂.采用XRD、FESEM、TEM、BET、XPS和DRS等分析手段对g-C3N4的微观结构进行表征,并考察尿素加入量、催化剂浓度、染料初始浓度、溶液pH值以及光源等对光催化降解甲基橙的影响.结果表明:复合粉末前驱体所制备的g-C3N4具有典型的多孔结构,相比于纯二氰二胺或纯尿素所制备的产物具有更高的比表面积.随着尿素含量增加,g-C3N4产物的禁带宽度逐渐增大,而其表面的C和N摩尔比则从0.70降至0.60.可见光光催化降解甲基橙的实验结果显示随着尿素含量的增加,g-C3N4的光催化活性也随之增强,表明g-C3N4的表面化学组成及其氧化还原能力对可见光光催化活性起主要作用,而比表面积起次要作用.

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