气液爆轰控制合成多晶纳米二氧化钛  

Controllable Synthesis of Polycrystalline Nanostructure TiO_(2) by Gaseous-Liquid Detonation Method

作　　者：罗宁 孙鑫[1,2,3] 范学如 梁汉良[1,2,3] 陈彦龙 张桂民 董纪伟 翟成[4] Luo Ning;Sun Xin;Fan Xueru;Liang Hanliang;Chen Yanlong;ZhangGuimin;Dong Jiwei;Zhai Cheng(School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China;Explosive Mechanics and Engineering Blasting Research Center,China University of Mining and Technology,Xuzhou 221116,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学力学与土木工程学院,江苏徐州221116 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [3]中国矿业大学爆炸力学与工程爆破研究中心,江苏徐州221116 [4]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《稀有金属材料与工程》2022年第1期119-126,共8页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China (12072363);National Key Research and Development Project (2020YFA0711800)。

摘　　要：以氢气、氧气和四氯化钛为混合前驱体,通过气液爆轰法合成了多晶纳米二氧化钛。研究了不同摩尔比例的前驱体和初始反应压力对纳米二氧化钛晶相结构的影响。采用X射线衍射及透射电子显微镜对产物的纳米结构、成分、颗粒大小和形态进行了表征。结果表明:获得的二氧化钛存在纯净的锐钛矿相、纯净的金红石相和混合相,其中混合相的球形或者类球形颗粒粒径为20~150 nm。分析了纳米二氧化钛在气液爆轰中的形成机制。基于C-J理论和化学反应数据,计算了爆轰参数;该参数验证了不同摩尔比例的前驱体和初始反应压力对控制合成多晶纳米二氧化钛的影响。The polycrystalline nano-TiO_(2)was synthesized by the gaseous-liquid detonation(GLD) method using H_(2),O_(2), and Ti Cl_(4) as the mixture precursors. The effects of different molar ratios of precursors and initial reaction pressures on the nano-TiO_(2)crystalline structures were studied. The nanocrystal structures, components, particle size, and morphology were characterized by the X-ray diffraction(XRD) and transmission electron microscopy(TEM). The results demonstrate that the nano-TiO_(2)consists of pure anataseTiO_(2), pure rutile-TiO_(2), and the mixtures of spherical or quasi-spherical morphologies with particle size of 20~150 nm. Furthermore,the formation mechanism of nano-TiO_(2)by GLD method was analyzed. The relevant GLD parameters were calculated based on the C-J theory and the related chemical reaction data, which effectively verifies the influence of different molar ratios of precursors and initial pressures on the controllable synthesis of polycrystalline nano-TiO_(2).

关 键 词：纳米二氧化钛 气液爆轰 多晶纳米结构 爆轰参数 C-J理论 

分 类 号：TQ134.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]