中孔奈米晶型二氧化錫之製備
Other Title
Synthesis of Mesoporous Tin Oxide by Supramolecule-Templating of Hydrous Sol
Journal
材料科學與工程
Journal Volume
35
Journal Issue
2
Start Page
108
End Page
112
ISSN
0379-6906
Date Issued
2003-06
Author(s)
董建岳
Abstract
爲製備更高比表面積，孔洞分佈更集中之二氧化錫，本研究搭配了液晶模版機制(supramolecular templating approach)的使用，以及溶膠－凝膠法(sol-gel method)，來製備二氧化錫粉末，此粉末在300℃的燒結溫度下，擁有比表面積324 平方公尺/g，並保有六方最密堆積之規則排列中孔洞，平均孔徑大小爲2.9 nm，孔洞分佈亦非常集中，標準差爲1.7nm（以1.7nm至300 nm之間的孔徑作計算）。再將燒結溫度提高至500℃，仍可保有150 平方公尺/g之高比表面積。本研究並對此材料在加熱過程中，微結構與化學成分的變化作完整的分析與探討。
Fully crystallized tin oxide of high surface area and pore-size uniformity was obtained by adopting a two-step supramolecule-templating process, in which tin oxide hydrous sol was first synthesized and peptized via the conventional sol-gel process and then mixed with cetyltrimethylammonium bromide (CTAB). After heating at 300℃ to completely burn off the organics, the resulted crystalline tin oxide gel exhibited a surface area of 324 M^2/g and a hexagonal mesoporous structure with an average pore size of 2.9 nm and standard deviation of 1.7 nm. Even after calcination at 500℃, the powder retained a surface area of 150 m^2/g.
Subjects
中孔結構
液晶模版
二氧化錫
奈米晶型
Mesostructure
Liquid-Crystal-templating
Tin Oxide
Nanocrystallites
Type
journal article