He Xuanmeng, Wang Fen, Liu Hui, Wang Xinzhen, Gao Jiaojiao
School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, People's Republic of China. School of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, People's Republic of China.
Nanotechnology. 2019 Jul 19;30(29):295701. doi: 10.1088/1361-6528/ab0ce0. Epub 2019 Mar 5.
Highly dispersed SiO/BiVO hybrid pigments with a spherical structure and high near-infrared (NIR) reflectance have been successfully fabricated by a facile sol-gel method followed by calcination. The dispersed and uniformly spherical particles of the hybrid pigments were caused by the support provided by SiO microspheres, and their color was adjusted via the band-gap energy, which was changed with the incorporation of SiO microspheres. The SiO/BiVO-3 hybrid pigment presented higher yellow hues (b* = 91.42) and more dispersed spherical particles than other as-prepared hybrid pigments and commercially available BiVO-based yellow pigment. This strategy could save 72 wt% resource of BiVO while yielding the same amount of yellow pigment with high color performance. Therefore, the prepared hybrid pigments not only dramatically decreased the cost of expensive pigments, but also saved scarce resources and reduced environmental pollution. In addition, the SiO/BiVO-3 hybrid pigment also presented high NIR reflective performance, which demonstrated that it would be a favorable candidate for colorful NIR reflective pigments with wide applications in heat insulation.
通过简便的溶胶 - 凝胶法随后进行煅烧，成功制备了具有球形结构和高近红外（NIR）反射率的高度分散的SiO/BiVO混合颜料。混合颜料分散且呈均匀球形的颗粒是由SiO微球提供的支撑所致，其颜色通过带隙能量进行调节，带隙能量会随着SiO微球的掺入而改变。与其他制备的混合颜料和市售的BiVO基黄色颜料相比，SiO/BiVO - 3混合颜料呈现出更高的黄色调（b* = 91.42）和更分散的球形颗粒。该策略可在生产相同数量且具有高颜色性能的黄色颜料时节省72 wt%的BiVO资源。因此，制备的混合颜料不仅显著降低了昂贵颜料的成本，还节省了稀缺资源并减少了环境污染。此外，SiO/BiVO - 3混合颜料还呈现出高NIR反射性能，这表明它将是一种在隔热方面具有广泛应用的彩色NIR反射颜料的理想候选材料。
