Reaction Mechanism between Zn²⁺ and Diatomite in Preparation of Zn²⁺/Diatomite Antibacterial Agent

Abstract:

The reaction mechanism between Zn²⁺ and diatomite in preparation of Zn²⁺/diatomite antibacterial agent by diatomite adsorbing and solidifying Zn²⁺ in its pores was studied. Microporous adsorption, characterized by hydrated Zn²⁺ adsorbed in the micropores of diatomite, and surface coordinate adsorption, featured with coordination of Zn²⁺ with functional groups on the surfaces of diatomite, were the main adsorption ways accompanied by ion exchange adsorption and physical adsorption. SEM was used to observe the morphologies of diatomite before and after adsorption. Due to the dehydration between OH groups on the surfaces of diatomite when heat treated at high temperature, Si-O-Zn bonds were formed, combining Zn²⁺ with diatomite together. Reaction model between Zn²⁺ and diatomite was established.

• Periodical: Materials Science Forum (Volume 685)
• Pages: 260-263
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.685.260
• Online since: June 2011
• Authors: Ning Liang, Hao Ding, Yong Teng Hu, Bai Kun Wang
• Keywords: Diatomite, Microporous Adsorption, Surface Coordinate Adsorption, Zinc Ion

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