一种非球形纳米二氧化硅颗粒制备新方法

doi:10.11896/j.issn.1005-023X.2018.10.022

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Abstract Non-spherical nanosize silica particles were prepared by ion exchange method using low cost industrial sodium silicate as raw material. In the preparation process, the morphology of the silica particle was controlled by the shape of the silica nuclei, which was dominated by the feeding rate of inorganic alkali catalyst 1% (mass fraction) NaOH solution to the fresh active silicic acid during nuclei formation process. This method avoided the deficiency of conventional methods (by introducing organic bases or by introducing double or triple valence cations) for synthesizing non-spherical silica particles. Scanning electron microscopy (SEM) de-monstrated that the morphology of the prepared silica particles were not spherical (like peanut, dumbbell or jujube), the axial size was about 10—20 nm, the range of the radial size was about 45—80 nm. Dynamic light scattering (DLS) test revealed that the average size of Gaussian distribution of non-spherical particle was 39 nm, and the polydispersity index was as high as 0.261. This method of preparing non-spherical silica particles is simple and environment-friendly, and is very beneficial to industrial production and application.

Key words： non-spherical nanosize silica particle radial size axial size

Published: 25 May 2018 Online: 2018-07-06

CLC number:	TB321
	TB32
	U283.5

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	Articles by authors
	KONG Hui
	LIU Weili
	SONG Zhitang

Cite this article:

KONG Hui,LIU Weili,SONG Zhitang. An Innovative Preparation Methodology of Non-spherical Nanosize Silica Particle[J]. Materials Reports, 2018, 32(10): 1683-1687.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.10.022 OR https://www.mater-rep.com/EN/Y2018/V32/I10/1683

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