کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1527467 | 1511859 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication of Ag nanoparticles-coated macroporous SiO2 structure by using polystyrene spheres
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ag nanoparticles-coated macroporous SiO2 structure was fabricated by a novel approach in which at first Ag nanoparticles were coated onto polystyrene (PS) spheres without a surfactant, then these Ag nanoparticles-coated PS beads (Ag/PS) were self-assembled by sedimentation-aggregation with tetraethyl orthosilicate (TEOS), and finally Ag nanoparticles-coated macroporous silica (Ag/SiO2) was obtained after removal of the PS cores. The heat-treatment temperature and the gelation time were investigated to optimize the microstructural morphology, thermal decomposition of organic materials, matrix wall thickness and densification behavior. The three dimensionally assembled Ag/SiO2 had 200Â nm uniform macropores and a high specific surface area of 142Â m2Â gâ1. The XRD, FE-SEM, EDX, BET and optical absorbance analysis indicated that the exactly three-dimensional structure of the template had been imprinted in the final samples and the walls of the macroporous SiO2 were coated uniformly with Ag nanoparticles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 101, Issues 2â3, 15 February 2007, Pages 486-491
Journal: Materials Chemistry and Physics - Volume 101, Issues 2â3, 15 February 2007, Pages 486-491
نویسندگان
Jeong Ho Ryu, Dong Suk Chang, Bong Geun Choi, Jong-Won Yoon, Chang Sung Lim, Kwang Bo Shim,