直接热处理法制备R-TiO_(2)晶须及其生长机制研究  

Fabrication and Growth Mechanism Research of R-TiO_(2) Nanowhiskers by Direct Heat Treatment

作　　者：郭林秀 盖建丽 GUO Linxiu;GAI Jianli(Shanxi Engineering Vocational College,Taiyuan 030009,China;Qingdao Binhai University,Qingdao 266555,China)

机构地区：[1]山西工程职业学院,太原030009 [2]青岛滨海大学,青岛266555

出　　处：《中国陶瓷》2021年第9期65-72,共8页China Ceramics

基　　金：山西省高等学校科技创新项目(2019L0995);中国博士后科学基金(2017M622297)。

摘　　要：一维金红石型纳米二氧化钛(R-TiO_(2))由于其特殊的结构,在可再生清洁能源领域被广泛研究和应用。本文以Ti_(3)Si_(1-x)Al_(x)C_(2)固溶体块体材料为基体,研究了Ti_(3)Si_(1-x)Al_(x)C_(2)固溶体中的Al含量、环境因素对R-TiO_(2)纳米晶须生长的影响。表明,随Ti_(3)Si_(1-x)Al_(x)C_(2)固溶体中的Al含量的增加,R-TiO_(2)长晶须逐渐生成,当x≥0.25时,表面排成列或扎堆生成约2μm的R-TiO_(2)长晶须;而纳米晶须随着O含量的增加生成量减少;升高温度,样品表面会生成α-Al_(2)O_(3)纳米片(x≥0.5时)。因此,Ti_(3)Si_(1-x)Al_(x)C_(2)固溶体在800℃、100 Pa条件下直接热处理成功制备出R-TiO_(2)纳米晶须,开发了一种简单且环境友好的方法。One-dimensional rutile manostuctures titanium dioxide(R-TiO_(2))have the unique morphologies attracted considerable attentions for their promising applications in renewable clean energy.In this paper,the effect of Al content and environmental factors on the growth of R-TiO_(2)nanowhiskers in Ti_(3)Si_(1-x)Al_(x)C_(2)solid solution bulk material was studied.Show that with the increase of Al content in Ti_(3)Si_(1-x)Al_(x)C_(2)solid solution,the R-TiO_(2)nanowhiskers is gradually.When x≥0.25,about 2μm R-TiO_(2)nanowhiskers is arranged or clustered on the surface.With the increase of O content,the amount of nanowhiskers was decreased.As the temperature further increases,there are replaced by a lot ofα-Al_(2)O_(3) nanosheets with the Al content of Ti_(3)Si_(1-x)Al_(x)C_(2)increasing(x≥0.5).Therefore,a simple and environmentally friendly method for prepared R-TiO_(2)nanowhiskers were dirent treating bulk Ti_(3)Si_(1-x)Al_(x)C_(2)solid solution at 800℃in 100 Pa air.

关 键 词：TIO2 Ti_(3)Si_(1-x)Al_(x)C_(2) Al_(2)O_(3) 纳米晶须 纳米片 

分 类 号：TQ174.75[化学工程—陶瓷工业]