氧化锌包覆超细二氧化钛的制备及其紫外屏蔽性能

Preparation and UV Shielding Characteristic of ZnO-coated Ultrafine TiO_2 Particles

采用分步 -均一沉淀法 ,以尿素为沉淀剂制备粒径为 4 0 nm的锐钛矿型二氧化钛超细粒子 ,并在其表面包覆晶体粒径为 1 0 .2 nm的氧化锌 ,研究了不同含量的氧化锌对包覆效果及紫外吸收性能的影响 .结果表明 ,合成的氧化锌包覆超细锐钛矿型 Ti O2 的紫外吸收性能明显高于锐钛矿型超细二氧化钛、金红石型二氧化钛及市售氧化锌 .

The synthesis of ZnO coated ultrafine TiO 2 particles by factional homogeneous method is reported in this paper. The diameter of ZnO crystal is 10.2 nm, and the particle diameter of spherical TiO 2 is 40 nm. The influence of the content of ZnO on the coating affection and UV shielding characteristic is investigated. The UV shielding capability of ZnO coated TiO 2 is higher than that of anatase ultrafine TiO 2, rutile TiO 2 particles and commercial ZnO.