NH3BH3 and NaBH4 Enclosed in Geopolymers and Zeolites
NH3BH3 and NaBH4 Enclosed in Geopolymers and Zeolites
复制标题
NH3BH3 和 NaBH4 封装在地质聚合物和沸石中
DOI:
10.1002/9781119234463.ch10
复制
发表时间:
2015
期刊:
影响因子:
--
通讯作者:
J. C. Buhl
中科院分区:
文献类型:
--
作者:
C. H. Rüscher;L. Schomborg;Z. Assi;J. C. Buhl
ABSTRACT Ammonia-borane, NH3BH3 (= AB) and sodium tetrahydroborate (NaBH4= SB) can easily be dissolved in sodium aluminate and silicate solutions. Upon mixing they result in immediate gel formation and re-crystallization of AB and SB during drying. In case of AB-G IR-absorption spectra indicate that the geopolymer matrix (= G) consists of mainly sialate units (Si-O-Al-O). Heating experiments to 120, 150 and 300 C show the formation of polyaminoboranes (PAB) and polyiminoborane (PIB). The underlying reactions could be related to hydrogen release in two exothermic peaks observed at around 122 C and 160 C. In the course of further optimizations of the SB content in SB-G the Si/Al ratio of G could slightly increase with increasing the Si/Al ratio between 0.27 and 2.7. The water content of SB-G decreases linearly with the decreasing contribution of the geopolymer matrix. SB-SOD could be crystallized systematically following a hydrothermal soft chemical synthesis technique at 60 C, 80 C and 120 C. The effect of variations in particle and crystallite sizes could be correlated with effective hydrogen release and the water content in the matrix of the SB-SOD.
登录
查看更多内容
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
J. Buhl;T. Gesing;T. Höfs;C. Rüscher
通讯作者:
C. Rüscher
DOI:
10.1002/9781119040293.ch1
发表时间:
2014
期刊:
影响因子:
--
作者:
L. Schomborg;C. H. Rüscher;J. C. Buhl;F. Kiesel
通讯作者:
F. Kiesel
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Yunsheng Zhang;Wei Sun;Zongjin Li
通讯作者:
Zongjin Li
DOI:
10.1002/9781118807743.ch9
发表时间:
2013
期刊:
Zeitschrift für Kristallographie - Crystalline Materials
影响因子:
--
作者:
C. Rüscher;Lars Schomborg;A. Schulz;J. Buhl
通讯作者:
J. Buhl
影响因子:
4
作者:
T. K. Nielsen;A. Karkamkar;M. Bowden;F. Besenbacher;T. Jensen;T. Autrey
通讯作者:
T. Autrey