Niobic acid nanosheets synthesized by a simple hydrothermal method as efficient Brnsted acid catalysts

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	Niobic acid nanosheets synthesized by a simple hydrothermal method as efficient Brnsted acid catalysts
	Fan, Wenqing ; Zhang, Qinghong ; Deng, Weiping ; Wang, Ye ; Zhang QH(张庆红) ; Wang Y(王野)
刊名	http://dx.doi.org/10.1021/cm400192q
	2013-08-27
关键词	Catalyst selectivity Clarification Hydrothermal synthesis
英文摘要	This paper reports a novel bottom-up hydrothermal route for the synthesis of niobic acid nanosheets. This route is simpler and greener than the conventional top-down and multistep route for the synthesis of hydrated metal oxide nanosheets via exfoliation of layered compounds, which typically requires the use of bulky organic cations. We have clarified that the pH of the suspension for hydrothermal treatment, the hydrothermal temperature and time, and the presence of NH4+ play roles in determining the morphology of the product. We propose that the nanosheet is formed from amorphous niobic acid nanoparticles through a dissolution-crystallization mechanism. The obtained niobic acid nanosheets are uniform with a thickness of ～2 nm and uniquely possess mainly Br?nsted acid sites. As compared to the conventional amorphous niobic acid and several other typical solid acid catalysts, the niobic acid nanosheet synthesized by our bottom-up method exhibits significantly higher activity and selectivity for the Friedel-Crafts alkylation of anisole with benzyl alcohol. We have further demonstrated that our niobic acid nanosheet is a water-tolerant and efficient catalyst for the hydrolysis of inulin, a polysaccharide-based biomass, into fructose. ? 2013 American Chemical Society.
语种	英语
出版者	American Chemical Society
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89189]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Fan, Wenqing,Zhang, Qinghong,Deng, Weiping,et al. Niobic acid nanosheets synthesized by a simple hydrothermal method as efficient Brnsted acid catalysts[J]. http://dx.doi.org/10.1021/cm400192q,2013.
APA	Fan, Wenqing,Zhang, Qinghong,Deng, Weiping,Wang, Ye,张庆红,&王野.(2013).Niobic acid nanosheets synthesized by a simple hydrothermal method as efficient Brnsted acid catalysts.http://dx.doi.org/10.1021/cm400192q.
MLA	Fan, Wenqing,et al."Niobic acid nanosheets synthesized by a simple hydrothermal method as efficient Brnsted acid catalysts".http://dx.doi.org/10.1021/cm400192q (2013).