硫化镉纳米管的制备及其原位生长的热力学研究  

Preparation and in-situ thermodynamic investigation on growth of cadmium sulfide nanotubes

作　　者：万婷[1] 陈洁[1] 肖明[1] 左晨[1] 黄在银[1,2] 

机构地区：[1]广西民族大学化学化工学院,广西南宁530006 [2]广西高校食品安全与药物分析化学重点实验室,广西南宁530006

出　　处：《广西大学学报（自然科学版）》2017年第3期1197-1202,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(21273050;21573048);广西民族大学研究生教育创新计划(gxun-chxps201681)

摘　　要：为获取纳米材料生长过程的原位热力学瞬时信息,以实现纳米材料优化设计,文中以硫化镉(Cd S)纳米管为目标材料,在298.15 K下采用高精度、高灵敏度的现代微热量技术获取其生长过程的原位热谱曲线。结果显示,反应开始瞬时吸热,并有1个尖锐的吸热峰,在随后的过程中连续出现3个放热峰。为探讨Cd S纳米管生长过程的形貌演变、热力学信息及生长机理,结合X射线衍射粉末仪(XRD)、场发射扫描电子显微镜(FE-SEM)和透射电子显微镜(TEM)、荧光光度计(PL)等对Cd S纳米管的结构、形貌、尺寸及光学性能进行表征,结果表明,整个生长过程先吸热后放热,依次经历微乳液混合、晶体成核、液滴重组和晶体生长。研究结果可揭示纳米材料生长过程的热力学特征,丰富纳米材料非平衡生长过程的科学内涵,发展纳米物理化学的理论方法。In order to obtain the in-situ thermodynamics instantaneous information about the growth process of nanomaterials for optimization design of nanomaterials. Cadmium sulfide( Cd S),nanotubes were monitored by modern microcalorimetry technique with high precision and sensitivity at 298. 15 K. The samples were also characterized by X-ray powder diffraction( XRD),field emission scanning electron microscopy( FE-SEM),transmission electron microscopy( TEM) and photoluminescence( PL) analyses. Combined with these analyses,the thermic information and the growth mechanism of Cd S nanotubes were discussed. The result showed that the thermodynamic characteristics about the growth of nanomaterials. It revealed that an exothermic peak was at firstly appeared,and then continuously followed with 3 endothermic peaks in the in-situ thermal curve ofgrowth process about Cd S nanotubes. Moreover,the process experienced some crystal grown stages in turn. In a word,these conclusions not only illustrate the thermodynamic characteristics of the insitu growth process of nanomaterials,enrich the scientific connotation about the non-equilibrium growth process of nanomaterials,but also develop the theory of 'physical chemistry of nanoscale'.

关 键 词：原位生长 微热量法 热动力学 CdS纳米管 微乳液法 

分 类 号：O642.1[理学—物理化学] O643.1[理学—化学]