ZnO nanostructures decorated hollow glass microspheres as near infrared reflective pigment
ZnO nanostructures decorated hollow glass microspheres as near infrared reflective pigment
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DOI：
10.1016/j.ceramint.2017.04.067
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发表时间：
2017-08-15
影响因子：
5.2
通讯作者：
Fan, Yueming
中科院分区：
文献类型：
--
作者：
Lu, Denghui;Gao, Qiang;Fan, Yueming
采用溶胶-凝胶法成功制备了空心玻璃微珠/ZnO复合颜料。通过Zn-O-Si键的形成，将纳米片、纳米片或纳米颗粒组成的ZnO涂层锚定在空心玻璃微球表面。提出了一个合理的生长机制来解释ZnO纳米涂层的形成。结果表明，ZnO纳米结构的形貌对复合颜料的近红外反射性能有很大的影响。纳米颗粒结构比纳米片和纳米片结构具有更高的近红外反射率。空心玻璃微珠/ZnO复合颜料的近红外太阳反射率为95.7%，而复合颜料的太阳总反射率高达97.2%。对于涂覆有复合颜料的热箱，获得了外表面温度的约11.1 ℃的降低。因此，空心玻璃微珠/ZnO复合材料是一种优良的近红外反射颜料，可用于建筑物外墙和屋顶的高效太阳能反射涂料。
Hollow glass microsphere/ZnO composite pigments were successfully prepared by a facile sol-gel method. ZnO coating layers composed of nanosheets, nanoplates, or nanoparticles were anchored at the surface of hollow glass microspheres by formation of Zn-O-Si bond. A reasonable growth mechanism for elucidating the formation of ZnO ilanocoating was proposed. The results indicated that the near-infrared reflectance property of the composite pigments was strongly affected by the morphology of ZnO nanostructures. The nanoparticles structures exhibited higher near-infrared reflectance than that of nanosheets and nanoplates structures. The near-infrared solar reflectance of hollow glass microsphere/ZnO composite pigments was 95.7%, while the total solar reflectance of the composite pigment was as high as 97.2%. An approximately 11.1 degrees C decrease in outer surface temperature was obtained for the heat box coated with composite pigments. Therefore, hollow glass microsphere/ZnO composites are excellent near infrared reflective pigments for efficient solar reflective coatings designed for building facades and roofs.