| 石墨烯基TiO_2复合材料的表征及其可见光催化活性研究 |
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| 作者姓名： | 李跃 祝立强 陈佩华 丁枭 程良彪 丛野 李轩科 |
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| 作者单位： | 武汉科技大学化学与化工学院,湖北 武汉,430081,武汉科技大学化学与化工学院,湖北 武汉,430081,武汉科技大学化学与化工学院,湖北 武汉,430081,武汉科技大学化学与化工学院,湖北 武汉,430081,武汉科技大学化学与化工学院,湖北 武汉,430081,武汉科技大学化学与化工学院,湖北 武汉,430081,武汉科技大学化学与化工学院,湖北 武汉,430081;武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北 武汉,430081 |
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| 基金项目： | 国家自然科学基金资助项目(51472186,51402221). |
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| 摘 要： | 以氧化石墨烯与石墨烯为碳源,在熔盐介质中与钛粉反应原位生成石墨烯基TiC中间产物,并通过后续控制氧化制得石墨烯基TiO_2复合光催化剂,结合FTIR、XRD、Raman、SEM等手段,对两种石墨烯材料的结构及形貌差异进行表征,并分析了其对所制复合材料结构、形貌及可见光催化活性的影响。结果表明,所制复合材料仍保持碳源的层片状结构,TiC和TiO_2颗粒均匀包覆在碳源表面;以石墨烯为碳源更有利于表面原位生成TiC晶粒的生长,其晶体结构更为完善;两种结构的石墨烯基TiO_2复合材料均对目标污染物亚甲基蓝有较强的吸附能力和可见光降解能力。
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| 关 键 词： | 石墨烯 氧化石墨烯 熔盐反应 TiO2 TiC 复合光催化剂 光催化活性 亚甲基蓝降解 |
| 收稿时间： | 2016/11/23 0:00:00 |
Characterization and visible-light photocatalytic performance of graphene-based TiO2 composites |
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| Authors: | Li Yue Zhu Liqiang Chen Peihu Ding Xiao Cheng Liangbiao Cong Ye and Li Xuanke |
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| Institution: | College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China,College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China,College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China,College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China,College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China,College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China and College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China;State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China |
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| Abstract: | With graphene oxide and graphene as carbon sources, graphene-based TiC intermediates were synthesized in molten salt medium by in-situ reaction with titanium powder. The graphene-based TiO2 composites were prepared thereafter through the oxidation process of intermediates. By means of FTIR, XRD, Raman and SEM, the differences in structure and morphology between two graphene materials were analyzed, and their effects on the morphology, structure as well as the visible light photocatalytic activity of prepared composites were investigated. The results show that the obtained composites exhibit a similar layer structure as the carbon sources, and the formed TiC and TiO2 particles are uniformly covered on its surface. Besides, applying graphene as carbon source is more favorable to the growth of TiC crystalline structure. Both graphene oxide-based and graphene-based TiO2 composites mainifest remarkable adsoption and visible light photodegragation abilities for methylene blue as the target pollutant. |
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| Keywords: | graphene graphene oxide molten salt reaction TiO2 TiC composite photocatalyst photocatalytic activity methylene blue degradation |
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