引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 986次   下载 1088 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Influence of Cu-substituted Hydrotalcite Precursors and Derived Oxides
Yu Junjie,Jiang Zheng,Kang Shoufang,Hao Zhengping*,Hu Chun
Author NameAffiliationE-mail
Yu Junjie Research Center for Eco Environmental Sciences, The Chinese Academy of Sciences Beijing 100085  
Jiang Zheng Research Center for Eco Environmental Sciences, The Chinese Academy of Sciences Beijing 100085  
Kang Shoufang Research Center for Eco Environmental Sciences, The Chinese Academy of Sciences Beijing 100085  
Hao Zhengping* Research Center for Eco Environmental Sciences, The Chinese Academy of Sciences Beijing 100085 zpinghao@mail.rcees.ac.cn  
Hu Chun Research Center for Eco Environmental Sciences, The Chinese Academy of Sciences Beijing 100085  
Abstract:
The coprecipitation method was used to prepare a series of different oxides (CuO: 0, 5%, 10%, 15%, 20%, 30% and 40%) derived from Cu substituted Mg/Al mixed anionic clay precursors (hydrotalcites) at the ratio of M2+/M3+ =3. In order to study influences of Cu and Mg content upon the performance of these materials, such characterization techniques as X-ray diffraction, thermogravimetrical analysis, differential scanning calorimetry, temperature programmed reaction and Fourier transform infrared reflectance spectra, were used. The results showed that complete structure of hydrotalcite precursors could be formed when CuO≤30%. When CuO≥40%, Cu(OH)2 phase appeared. Homogeneous composite oxides can be obtained by high temperature calcination at CuO≤20%. When CuO>20%, CuO phase was isolated. The content of Cu and Mg had significant influences on thermal stability of materials. The reduction ability of materials was related to calcination temperatures and material composition.
Key words:  Hydrotalcite precursors, Composite oxides, Structure characterization
FundProject:
Cu取代对水滑石前驱物及其衍生氧化物性能的影响
於俊杰,蒋政,康守方,郝郑平*,胡春
摘要:
恒定二价与三价阳离子比为3,采用共沉淀法制备不同Cu含量的系列水滑石前驱物,经过焙烧形成复合氧化物(CuO质量分数为0、 5%、 10%、 15%、 20%、 30%、 40%)材料.采用X射线衍射(XRD)、热重分析(TGA)、差示扫描量热(DSC)、程序升温还原(TPR)、傅立叶红外光谱分析(FTIR)等表征手段研究了Cu、 Mg含量对材料前驱物和衍生复合氧化物物化性能的影响.结果表明,在CuO≤30%范围内可以形成结构完整的水滑石前驱物, CuO>40%时出现Cu(OH)2杂相; CuO≤20%(质量分数)时,经高温焙烧可得到的均匀的复合氧化物, CuO>20%时出现CuO偏析.Cu、 Mg含量对材料的热稳定性能有显著的影响,焙烧温度和组成决定了材料的还原性能.
关键词:  水滑石前驱物  复合氧化物  结构表征
DOI:10.1088/1674-0068/18/2/251-256
分类号: