Effect of Polyelectrolyte Dispersants on the Preparation of Silica-Coated Zinc Oxide Particles in Aqueous Media

• Published in: Journal of the American Ceramic Society Vol. 85; no. 8; pp. 1937 - 1940
• Main Authors: Wang, Hongzhi, Nakamura, Hiroyuki, Yao, Ken, Uehara, Masato, Nishimura, Satoshi, Maeda, Hideaki, Abe, Eiichi
• Format: Journal Article
• Language: English
• Published: Westerville, Ohio American Ceramics Society 01.08.2002; Blackwell; Wiley Subscription Services, Inc
• Subjects: Chemistry; Colloidal state and disperse state; Cross-disciplinary physics: materials science; rheology; dispersants/dispersion; Exact sciences and technology; General and physical chemistry; Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids); Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Physics; Powders; silica; zinc oxide; Inorganic compounds; Photocatalysis; Transition element compounds; Oxides; Dispersant; Experimental study; Polyelectrolyte; Zinc oxides; II-VI semiconductors; Aqueous solutions; Silicon oxides; Polymers; Protective coatings; Growth from solution; Sodium silicates

Sodium silicate was utilized to obtain a SiO2 coating on ZnO particles to prevent a photocatalytic reaction between ZnO and phenol. During the coating process, pH control is important to avoid dissolution of the ZnO as well as to obtain a good dispersion. Two kinds of polyelectrolyte dispersants wer...