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榴莲形十二面体金红石微钠颗粒的水热振荡式形成及光催化性能研究

发表时间:2012-04-15  浏览量:1159  下载量:468
全部作者: 高琼,刘佳,杨贤锋,文玉萍,周强,吴明Z
作者单位: 中山大学化学与化学工程学院,生物无机与合成化学教育部重点实验室,环境与能源化学广东普通高校重点实验室
摘 要: 通过草酸体系中草酸氧钛羟基水合物的形成与水热转化,制备了结构新颖的TiO2微米多面体结构材料,利用X射线衍射(X-ray diffraction, XRD)、扫描式电子显微镜(scanning electron microscope, SEM)、透射电子显微镜(transmission electron microscopy, TEM)、选区电子衍射(selected-area electron diffraction, SAED)等测试手段对其结构进行表征,研究温度参数对晶体生长的影响,并发现了从未报道过的TiO2晶型随时间、浓度改变呈往复振荡变化的新现象。最后对部分TiO2纳米结构的光催化性能进行分析评价,证明TiO2的形貌对其光催化性能有一定影响。
关 键 词: 无机合成化学;草酸;TiO2;复杂纳米结构;水热法;可控合成
Title: Hydro(solvo)thermal synthesis and characterization of durian-shaped dodecahedral rutile microparticles
Author: GAO Qiong, LIU Jia, YANG Xianfeng, WEN Yuping, ZHOU Qiang, WU Mingmei
Organization: Key Laboratory of Bioinorganic and Synthetic Chemistry, Ministry of Education, Key Laboratory of Environment and Energy Chemistry of Guangdong Higher Education Institutes, School of Chemistry and Chemical Engineering, Sun Yat-Sen University
Abstract: In this paper, aqueous complex titanyl oxalate acid was synthesized through hydrothermal approach in the oxalic acid solution, and it can be further transformed into rutile micro-polyhedral under hydrothermal situation. The products were characterized in detail by powder X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and selected-area electron diffraction (SAED) techniques. Furthermore, with varying reaction time , a series of TiO2 nanocrystals with different phase and complex morphologies were performed. And an interesting phenomenon that the crystal phase composition of product can to-and-fro transform with the change of experimental parameters was found. The effect of different parameters on the crystal phase composition and morphology of the product was also investigated. The photocatalytic degradation results of methyl orange clearly demonstrate that the photocatalytic performance of TiO2 nanomaterials is related to their structure.
Key words: inorganic synthetic chemistry; oxalic acid; TiO2; nanocomposites; hydrothermal synthesis; controlled growth
发表期数: 2012年4月第7期
引用格式: 高琼,刘佳,杨贤锋,等. 榴莲形十二面体金红石微钠颗粒的水热振荡式形成及光催化性能研究[J]. 中国科技论文在线精品论文,2012,5(7):630-635.
 
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