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蝶翅结构三维石墨相氮化碳光催化材料的制备及其气相异丙醇光降解特性研究

发表时间:2015-12-31  浏览量:1722  下载量:905
全部作者: 许军,严润羽,周涵,范同祥
作者单位: 上海交通大学材料科学与工程学院,金属基复合材料国家重点实验室
摘 要: 以具有三维蜂窝状结构的宽带凤蝶(Papilio nephelus)鳞片为模板,采用两步复制工艺合成蝶翅结构三维构型石墨相氮化碳(g-C3N4)光催化材料。采用X射线衍射(X-ray diffraction,XRD)、傅里叶变换红外光谱(Fourier transform infrared spectroscopy,FTIR)、扫描电子显微镜(scanning electron microscope,SEM)、氮吸附等表征手段对所得光催化材料进行综合表征,研究了蝶翅结构三维氮化碳的气相光催化降解异丙醇(isopropyl alcohol,IPA)性能。结果表明:其在可见光下可将IPA降解为CO2和丙酮, 其CO2产出效率约为体相氮化碳材料的2倍。这归因于其较大的比表面积,并且三维分级构型有利于光捕获和气相物质的传输和吸附。同时该材料具有良好的循环稳定性。
关 键 词: 复合材料;蝶翅结构;三维构型;石墨相氮化碳;光催化
Title: Preparation of butterfly wing structured three-dimensional graphitic carbon nitride and its characters of isopropyl alcohol photocatalytic degradation
Author: XU Jun, YAN Runyu, ZHOU Han, FAN Tongxiang
Organization: State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiaotong University
Abstract: We report a novel two-step replication method for the facile synthesis of three-dimensional graphitic carbon nitride (g-C3N4) by using three-dimensional butterfly wings (Papilio nephelus) as templates. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), N2 adsorption/desorption measurements are applied for the characterization. Furthermore, the gaseous photocatalytic isopropyl alcohol (IPA) degradation activities are investigated. The results show that the main evolution products are CO2 and acetone, the CO2 evolution activity of butterfly wing structured three-dimensional carbon nitride is about 2 times higher than that of bulk carbon nitride, the reason is due to the higher surface area and three-dimensional hierarchical structures which is favorable for light harvesting and gases diffusion and adsorption. In the meanwhile, the photocatalyst has good cycling ability.
Key words: composite materials; butterfly wing structures; three-dimensional architectures; graphitic carbon nitride; photocatalysis
发表期数: 2015年12月第24期
引用格式: 许军,严润羽,周涵,等. 蝶翅结构三维石墨相氮化碳光催化材料的制备及其气相异丙醇光降解特性研究[J]. 中国科技论文在线精品论文,2015,8(24):2605-2612.
 
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