"Dirty nanostructures": aerosol-assisted synthesis of temperature stable mesoporous metal oxide semiconductor spheres comprising hierarchically assembled zinc oxide nanocrystals controlled via impurities.
"Dirty nanostructures": aerosol-assisted synthesis of temperature stable mesoporous metal oxide semiconductor spheres comprising hierarchically assembled zinc oxide nanocrystals controlled via impurities.
复制标题
“脏纳米结构”:气溶胶辅助合成温度稳定的介孔金属氧化物半导体球,包含通过杂质控制的分层组装的氧化锌纳米晶体
DOI:
10.1039/c3nr05007f
复制
发表时间:
2014
期刊:
影响因子:
6.7
通讯作者:
S. Polarz
中科院分区:
文献类型:
--
作者:
D. Lehr;D. Grossmann;W. Gruenert;S. Polarz
Structural disintegration or the loss of accessible surfaces of functional nanostructures due to processes involving mass transport (e.g. sintering) is a serious problem for any application of these materials at elevated temperatures, like in heterogeneous catalysis or chemical sensing. Phases with low sintering temperatures, e.g. some metals or metal oxides like zinc oxide (ZnO), are very sensitive in this respect. Therefore, it is not only relevant to prepare important materials with refined morphologies, but the desired features need to be stable under real conditions. In this study, we describe the preparation of mesoporous ZnO nano-/microspheres by means of a template-assisted aerosol technique. Furthermore, by intentional introduction of impurity elements as dopants, specific surface areas and porosities of the prepared materials can be increased significantly. The impurities also strongly improve the thermal stability of the described ZnO nanostructures against thermal sintering. Although the pure ZnO material suffers from a complete loss of porosity, the structures of the impure (”dirty”) materials change only negligibly. Even at 500 °C morphology and porosity are preserved. The latter advantageous property was used for testing the novel nanocatalysts in heterogeneous catalysis.
登录
查看更多内容
影响因子:
4
作者:
F. Smith
通讯作者:
F. Smith
DOI:
--
发表时间:
2008
期刊:
Thin Solid Films 516
影响因子:
--
作者:
Miao Zhang;・広川 二郎・安藤 真;Wakana Hara;Wakana Hara
通讯作者:
Wakana Hara
影响因子:
15
作者:
Lizandara-Pueyo, C.;van den Berg, M. W. E.;Polarz, S.
通讯作者:
Polarz, S.
影响因子:
--
作者:
S. Polarz;R. Regenspurger;J. Hartmann
通讯作者:
J. Hartmann
影响因子:
29.4
作者:
Brinker, CJ;Lu, YF;Fan, HY
通讯作者:
Fan, HY