TY - JOUR
T1 - Multicoating construction of BiVO4@SiO2 yellow pigment for enhanced thermal stability and acid resistance
AU - Zuo, Hongwei
AU - Song, Fusheng
AU - Zhu, Honglin
AU - Qiu, Qiyuan
AU - Zhu, Haoqi
AU - Wang, Zhumei
PY - 2024/11
Y1 - 2024/11
N2 - 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. © American Coatings Association 2024.
AB - 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. © American Coatings Association 2024.
KW - Acid resistance
KW - Bismuth vanadate
KW - Multicoating
KW - Thermal stability
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85198373036&origin=recordpage
U2 - 10.1007/s11998-024-00959-8
DO - 10.1007/s11998-024-00959-8
M3 - RGC 21 - Publication in refereed journal
SN - 1945-9645
VL - 21
SP - 2117
EP - 2127
JO - Journal of Coatings Technology and Research
JF - Journal of Coatings Technology and Research
IS - 6
ER -