{"title":"Multicoating construction of BiVO4@SiO2 yellow pigment for enhanced thermal stability and acid resistance","authors":"Hongwei Zuo, Fusheng Song, Honglin Zhu, Qiyuan Qiu, Haoqi Zhu, Zhumei Wang","doi":"10.1007/s11998-024-00959-8","DOIUrl":null,"url":null,"abstract":"<p>Monoclinic bismuth vanadate (BiVO<sub>4</sub>) as an environmentally friendly bright yellow pigment has received increasing attention over the past two decades. Unfortunately, poor thermal stability and acid resistance hinder its large-scale application in the industrial field. Herein, multicoated BiVO<sub>4</sub>@SiO<sub>2</sub> yellow pigments with enhanced thermal stability and acid resistance were successfully synthesized by the hydrolysis method. The effects of process parameters such as Si/Bi molar ratio (<i>n</i><sub>Si/Bi</sub>), water bath temperature (<i>T</i><sub>b</sub>), and dropwise addition rate of water (<i>V</i><sub>d</sub>) on the preparation of BiVO<sub>4</sub>@SiO<sub>2</sub> yellow pigments were systematically studied. The temperature stability of once-coated BiVO<sub>4</sub>@SiO<sub>2</sub> encapsulation pigments prepared under optimized conditions can be increased from 620 to 860°C. To further improve its thermal stability and acid resistance, the BiVO<sub>4</sub> pigments were wrapped multiple times and its temperature and acid resistance were evaluated. The results showed that after three times wrapping, the obtained BiVO<sub>4</sub>@SiO<sub>2</sub> showed optimal thermal stability and could maintain yellow color at 1200°C. The high-temperature stability and antiacid corrosion highlight the promise of its potential for commercial yellow pigments.</p>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":null,"pages":null},"PeriodicalIF":2.3000,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Coatings Technology and Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s11998-024-00959-8","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
Monoclinic bismuth vanadate (BiVO4) as an environmentally friendly bright yellow pigment has received increasing attention over the past two decades. Unfortunately, poor thermal stability and acid resistance hinder its large-scale application in the industrial field. Herein, multicoated BiVO4@SiO2 yellow pigments with enhanced thermal stability and acid resistance were successfully synthesized by the hydrolysis method. The effects of process parameters such as Si/Bi molar ratio (nSi/Bi), water bath temperature (Tb), and dropwise addition rate of water (Vd) on the preparation of BiVO4@SiO2 yellow pigments were systematically studied. The temperature stability of once-coated BiVO4@SiO2 encapsulation pigments prepared under optimized conditions can be increased from 620 to 860°C. To further improve its thermal stability and acid resistance, the BiVO4 pigments were wrapped multiple times and its temperature and acid resistance were evaluated. The results showed that after three times wrapping, the obtained BiVO4@SiO2 showed optimal thermal stability and could maintain yellow color at 1200°C. The high-temperature stability and antiacid corrosion highlight the promise of its potential for commercial yellow pigments.
期刊介绍：
Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.
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