硫化镉纳米管的制备及其原位生长的热力学研究

发布时间：2018-03-06 21:18

本文选题：原位生长　切入点：微热量法　出处：《广西大学学报(自然科学版)》2017年03期 　论文类型：期刊论文

【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。
[Abstract]:In order to obtain the in-situ thermodynamics instantaneous information of the growth process of nanomaterials and to realize the optimization design of nanomaterials, the cadmium sulphide (CD / S) nanotubes were used as the target materials with high accuracy at 298.15K. The in-situ thermal spectra of the growth process were obtained by a modern micro-heat technique with high sensitivity. The results showed that the reaction began to absorb heat instantaneously and had a sharp endothermic peak. Three exothermic peaks appeared in the subsequent process. In order to investigate the morphology evolution, thermodynamic information and growth mechanism of CDs nanotubes, The structure, morphology, size and optical properties of CDs nanotubes were characterized by X-ray diffractometer, field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM) and fluorescence photometer (PLL). The whole growth process was endothermic and then exothermic, followed by microemulsion mixing, crystal nucleation, droplet recombination and crystal growth. It enriches the scientific connotation of the nonequilibrium growth process of nanomaterials and develops the theoretical methods of nano-physical chemistry.
【作者单位】：广西民族大学化学化工学院;广西高校食品安全与药物分析化学重点实验室;
【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)
【分类号】：TB383.1;TQ132.44

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