Effects of Ti addition on alumina/titania composite aerogels synthesized by sol-gel process and supercritical ethanol drying | |
Department | 先进润滑与防护材料研究发展中心 |
Yang JF(杨景锋)1,2; Wang QH(王齐华)1; Wang TM(王廷梅)1; Wang QH(王齐华) | |
The second department | 固体润滑国家重点实验室 |
2017 | |
Source Publication | Journal of The Chinese Chemistry Society |
ISSN | 0009-4536 |
Volume | 64Issue:8Pages:978-985 |
Abstract | Alumina/titania composite aerogels with different titania contents were synthesized by the sol–gel process and supercritical ethanol drying. The structures and morphologies of synthesized aerogels were analyzed by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetry, and N2 adsorption–desorption tests. Supercritical ethanol drying induced the crystallization of titania, which prompted the transformation of the structure from pseudoboehmite to -Al2O3. Reversely, alumina retarded the anatase-to-rutile transformation of titania. The content of titania significantly affected the structure and morphology of alumina/titania composite aerogels. A high content of titania (≥40%) resulted in the phase separation of titania particles, which grew to form the anatase phase octahedral particles with well-developed facets. When the titania content was low, titania particles could be homogeneously dispersed in alumina particles to form spherical clusters with the poor crystallinity. Titania particles were in the anatase phase, and no rutile phase was formed until the temperature rose to 1000°C. In addition, titania addition resulted in a decrease in the specific surface area (SSA) of alumina aerogels because the SSA of titania was lower than that of alumina aerogels. |
Keyword | Titania/alumina Aerogel Supercritical Ethanol Drying Nanoparticle Phase Transformation Specific Surface Area |
Subject Area | 材料科学与物理化学 |
DOI | 10.1002/jccs.201600822 |
Funding Organization | The National Basic Research Program of China (973 Program, Grant No. 2015CB057502) |
Indexed By | SCI |
If | 0.935 |
Language | 英语 |
Funding Project | 聚合物自润滑复合材料研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22801 |
Collection | 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 固体润滑国家重点实验室(LSL) |
Corresponding Author | Wang QH(王齐华) |
Affiliation | 1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China 2.University of Chinese Academy of Sciences, Beijing 100049, P. R. China |
Recommended Citation GB/T 7714 | Yang JF,Wang QH,Wang TM,et al. Effects of Ti addition on alumina/titania composite aerogels synthesized by sol-gel process and supercritical ethanol drying[J]. Journal of The Chinese Chemistry Society,2017,64(8):978-985. |
APA | Yang JF,Wang QH,Wang TM,&王齐华.(2017).Effects of Ti addition on alumina/titania composite aerogels synthesized by sol-gel process and supercritical ethanol drying.Journal of The Chinese Chemistry Society,64(8),978-985. |
MLA | Yang JF,et al."Effects of Ti addition on alumina/titania composite aerogels synthesized by sol-gel process and supercritical ethanol drying".Journal of The Chinese Chemistry Society 64.8(2017):978-985. |
Files in This Item: | ||||||
File Name/Size | DocType | Version | Access | License | ||
Effects of Ti Additi(8016KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment