银/二氧化钛复合空心球的制备与表征
Preparation and characterization of silver/TiO2 composite hollow spheres.
作者信息
Song Caixia, Wang Debao, Gu Guohua, Lin Yusheng, Yang Jingyi, Chen Lei, Fu Xun, Hu Zhengshui
机构信息
Department of Applied Chemistry, Qingdao University of Science and Technology, Qingdao, Shandong 266042, People's Republic of China.
出版信息
J Colloid Interface Sci. 2004 Apr 15;272(2):340-4. doi: 10.1016/j.jcis.2003.08.062.
Silver-coated poly(methyl acrylic acid) (PSA) core-shell colloid particles were prepared by an in situ chemical reduction method. Crystalline silver/titania composite hollow spheres were obtained by coating the as-prepared PSA/silver particles with an amorphous titania layer and subsequently calcining in Ar atmosphere. SEM and TEM investigation indicated that the size of the as-prepared PSA/silver and PSA/silver/TiO(2) core-shell particles and silver/titania composite hollow particles was fairly uniform and the wall thickness of the hollow spheres was in the range of 40-80 nm. UV-vis absorption spectra were recorded to investigate their optical properties.
通过原位化学还原法制备了包覆银的聚甲基丙烯酸（PSA）核壳胶体颗粒。通过用无定形二氧化钛层包覆所制备的PSA/银颗粒，随后在氩气气氛中煅烧，获得了结晶银/二氧化钛复合空心球。扫描电子显微镜（SEM）和透射电子显微镜（TEM）研究表明，所制备的PSA/银和PSA/银/二氧化钛核壳颗粒以及银/二氧化钛复合空心颗粒的尺寸相当均匀，空心球的壁厚在40-80纳米范围内。记录紫外可见吸收光谱以研究它们的光学性质。
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