金红石相TiO2-石墨烯复合材料的制备及其光催化性能

以鳞片石墨为原料,用改进的Hummers法制备氧化石墨烯(GO),以异丙醇钛为钛源经一步水热法制备得到金红石相TiO2-石墨烯复合材料(rGO-TiO2),考察了氧化石墨烯用量对复合材料光催化性能的影响.采用X射线衍射(XRD),比表面积(BET),透射电镜(TEM),扫描电镜(SEM),拉曼光谱,紫外-可见(UV-Vis)吸收光谱和荧光光谱(PL)等测试手段对复合材料进行表征.结果表明:复合材料中TiO2为针簇状结构的金红石相,与石墨烯能够均匀复合:与纯金红石相TiO2相比,复合材料具有较大的比表面积.研究了该复合材料在紫外光下对罗丹明B以及可见光下对甲基橙光降解效果.当氧化石墨烯浓度为0....

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Published in物理化学学报 Vol. 29; no. 2; pp. 403 - 410
Main Author 甘永平 秦怀鹏 黄辉 陶新永 方俊武 张文魁
Format Journal Article
LanguageChinese
Published 浙江工业大学化学工程与材料学院, 杭州 310014 2013
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Summary:以鳞片石墨为原料,用改进的Hummers法制备氧化石墨烯(GO),以异丙醇钛为钛源经一步水热法制备得到金红石相TiO2-石墨烯复合材料(rGO-TiO2),考察了氧化石墨烯用量对复合材料光催化性能的影响.采用X射线衍射(XRD),比表面积(BET),透射电镜(TEM),扫描电镜(SEM),拉曼光谱,紫外-可见(UV-Vis)吸收光谱和荧光光谱(PL)等测试手段对复合材料进行表征.结果表明:复合材料中TiO2为针簇状结构的金红石相,与石墨烯能够均匀复合:与纯金红石相TiO2相比,复合材料具有较大的比表面积.研究了该复合材料在紫外光下对罗丹明B以及可见光下对甲基橙光降解效果.当氧化石墨烯浓度为0.5mg·mL-1时,制备得到的复合材料rGO-TiO2具有较好的光催化效果.
Bibliography:11-1892/06
GAN Yong-Ping QIN Huai-Peng HUANG Hui TAO Xin-Yong FANG Jun-Wu ZHANG Wen-Kui (College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China)
Rutile TiO2; Graphene; Hydrothermal method; Photocatalysis; Organic pollutant
In this work, graphene oxide (GO) was prepared from natural flake graphite by the modified Hummers method. A series of composites consisting of rutile TiO2 and graphene (rGO-TiO2) were synthesized via a one-step hydrothermal reaction of graphene oxide and titanium isopropylate. The influence of the amount of graphene oxide on the photocatalytic activity of the rGO-TiO2 composites was studied. The photocatalysts were characterized by Brunauer-Emmett-Teller sorption (BET), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, UV-Vis absorbance spectroscopy, and photoluminescence (PL) spectroscopy. The as-formed TiO2 was formed in the futile phase with a needle-cluste
ISSN:1000-6818
DOI:10.3866/PKU.WHXB201211022