Morphology control of nickel nanoparticles prepared in situ within silica aerogels produced by novel ambient pressure drying

Abstract Silica aerogels are low density solids with high surface area and high porosity which are ideal supports for catalyst materials. The main challenge in aerogel production is the drying process, which must remove liquid from the pores of the wet gel while maintaining the solid network. In thi...

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Autores principales:	Jialu Lu, Jiabin Wang, Khalil T. Hassan, Alina Talmantaite, Zhengguang Xiao, Michael R. C. Hunt, Lidija Šiller
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b179905bbcdd41c8af91fe133f36663f
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spelling	oai:doaj.org-article:b179905bbcdd41c8af91fe133f36663f2021-12-02T15:32:59ZMorphology control of nickel nanoparticles prepared in situ within silica aerogels produced by novel ambient pressure drying10.1038/s41598-020-68510-42045-2322https://doaj.org/article/b179905bbcdd41c8af91fe133f36663f2020-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-68510-4https://doaj.org/toc/2045-2322Abstract Silica aerogels are low density solids with high surface area and high porosity which are ideal supports for catalyst materials. The main challenge in aerogel production is the drying process, which must remove liquid from the pores of the wet gel while maintaining the solid network. In this work, the synthesis of silica aerogels and nickel-doped silica aerogels by a low energy budget process is demonstrated. Silica aerogels are produced by ambient drying using ammonium bicarbonate, rather than a conventional low surface tension solvent. Heating dissociates the ammonium bicarbonate, so generating CO2 and NH3 within the pores of the wet gel which prevents pore collapse during drying. Nickel-doped aerogels were produced by reducing nickel ions within pre-synthesised silica aerogels. The morphology of the resulting nickel particles—spheres, wires and chains—could be controlled through an appropriate choice of synthesis conditions. Materials were characterized using nitrogen adsorption/desorption isotherms, scanning electron microscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis and X-ray diffraction. The surface area of undoped aerogel is found to increase with the concentration of ammonium bicarbonate salts from 360 to 530 m2 g−1, and that of nickel-doped silica aerogel varies from 240 to 310 m2 g−1 with nickel doping conditions.Jialu LuJiabin WangKhalil T. HassanAlina TalmantaiteZhengguang XiaoMichael R. C. HuntLidija ŠillerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-9 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jialu Lu Jiabin Wang Khalil T. Hassan Alina Talmantaite Zhengguang Xiao Michael R. C. Hunt Lidija Šiller Morphology control of nickel nanoparticles prepared in situ within silica aerogels produced by novel ambient pressure drying
description	Abstract Silica aerogels are low density solids with high surface area and high porosity which are ideal supports for catalyst materials. The main challenge in aerogel production is the drying process, which must remove liquid from the pores of the wet gel while maintaining the solid network. In this work, the synthesis of silica aerogels and nickel-doped silica aerogels by a low energy budget process is demonstrated. Silica aerogels are produced by ambient drying using ammonium bicarbonate, rather than a conventional low surface tension solvent. Heating dissociates the ammonium bicarbonate, so generating CO2 and NH3 within the pores of the wet gel which prevents pore collapse during drying. Nickel-doped aerogels were produced by reducing nickel ions within pre-synthesised silica aerogels. The morphology of the resulting nickel particles—spheres, wires and chains—could be controlled through an appropriate choice of synthesis conditions. Materials were characterized using nitrogen adsorption/desorption isotherms, scanning electron microscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis and X-ray diffraction. The surface area of undoped aerogel is found to increase with the concentration of ammonium bicarbonate salts from 360 to 530 m2 g−1, and that of nickel-doped silica aerogel varies from 240 to 310 m2 g−1 with nickel doping conditions.
format	article
author	Jialu Lu Jiabin Wang Khalil T. Hassan Alina Talmantaite Zhengguang Xiao Michael R. C. Hunt Lidija Šiller
author_facet	Jialu Lu Jiabin Wang Khalil T. Hassan Alina Talmantaite Zhengguang Xiao Michael R. C. Hunt Lidija Šiller
author_sort	Jialu Lu
title	Morphology control of nickel nanoparticles prepared in situ within silica aerogels produced by novel ambient pressure drying
title_short	Morphology control of nickel nanoparticles prepared in situ within silica aerogels produced by novel ambient pressure drying
title_full	Morphology control of nickel nanoparticles prepared in situ within silica aerogels produced by novel ambient pressure drying
title_fullStr	Morphology control of nickel nanoparticles prepared in situ within silica aerogels produced by novel ambient pressure drying
title_full_unstemmed	Morphology control of nickel nanoparticles prepared in situ within silica aerogels produced by novel ambient pressure drying
title_sort	morphology control of nickel nanoparticles prepared in situ within silica aerogels produced by novel ambient pressure drying
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/b179905bbcdd41c8af91fe133f36663f
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Morphology control of nickel nanoparticles prepared in situ within silica aerogels produced by novel ambient pressure drying

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