氧化物包覆金属复合纳米粒子的形成机制及稳定性研究  

Growth Mechanism and Stability of Oxide-coated Metal Nanocomposite Particles

作　　者：王登科[1] 黄昊[1] 俞快[1] 李璞[1] 张雪峰[1] 董星龙[1] 

机构地区：[1]大连理工大学

出　　处：《中国粉体工业》2008年第5期19-23,共5页China Powder Industry

基　　金：国家自然科学基金(50371012);教育部新世纪优秀人才支持计划(NCET-05-0283)的资助

摘　　要：在传统的“汽-液-固（VLS）”生长机制的基础上，提出了“定量氧辅助汽-液-固（SOA—VLS）”生长机制，解释了氧化物包覆金属复合纳米柱子的形成机制和过程，并利用直流电弧等离子体法制备出多种氧化物包覆金属复合纳米粒子，如氧化硅包覆、氧化硼包覆、氧化钛包虔和多种稀土氧化物包覆的金属纳米壳／核结构复合粒子。本文着重介绍了氧化硼包覆金属复合纳米粒子的结构特征，以及温度敏感特性和酸碱腐蚀性。Based on the traditional ＂Vapor-Liquid-Solid （VLS）＂, we proposed the growth mechanism of ＂ Stoichiometric Oxygen Assisted Vapor-Liquid-Solid＂（SOA-VLS）, explained the synthesized mechanism of oxide-coated metal nanocapsules.Many kinds of the oxide-coated metal nanocapsules, such as silica-coated, boric oxide-coated, titanium dioxide-coated, and a mass of rare earths-oxide-coated metal nanocapsules, were synthesized and characterized. In this paper, we discussed and researched the characteristic of the boric oxide-coated Fe and boric oxide-coated Ni nanocapsules. The results show that the boric oxide-coated Fe nanocapsules are sensitive influenced by temperature, boric oxide-coated Ni nanocapsules was influenced by pH value.

关 键 词：复合纳米柱子 壳/核结构 生长机制 定量氧辅助VLS 

分 类 号：TQ174.758[化学工程—陶瓷工业] O643.361[化学工程—硅酸盐工业]