超音波快速合成中孔洞材料 MCM-48 與以具羧基之 SBA-15 合成奈米鉑粒子 ; Fast Sonochemical Synthesis of Mesoporous Silica MCM-48 and Using Carboxylic Acid Functionalized SBA-15 to Prepare Pt Nanoparticles

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/48060

Title:	超音波快速合成中孔洞材料 MCM-48 與以具羧基之 SBA-15 合成奈米鉑粒子;Fast Sonochemical Synthesis of Mesoporous Silica MCM-48 and Using Carboxylic Acid Functionalized SBA-15 to Prepare Pt Nanoparticles
Authors:	黃士哲;Shih-Jhe Huang
Contributors:	化學研究所
Keywords:	鉑顆粒;中孔洞含鋁材料;超音波震盪;中孔洞材料;mesoporous;ultrasonic irradiation;pt nanoparticles;mesoporous aluminosilicate
Date:	2011-07-25
Issue Date:	2012-01-05 14:28:36 (UTC+8)
Abstract:	本論文分為三個部分，由於使用 Gem 16-12-16 與 Fumed Silica 合成 MCM-48，文獻上需要五天才能完成，相當耗時，因而本論文針對時間縮短最佳化條件進行研究。在第一部分 MCM-48 快速合成裡，因為Gem 16-12-16本身在合成MCM-48的高再現性，故使用 Gem 16-12-16 為界面活性劑，在加入 Fumed Silica 矽原後的混合過程中使用超音波震盪，藉由超音波震盪把原本長達五天的合成過程縮短為一天，且不喪失太多傳統合成MCM-48所擁有的特性，並探討超音波震盪與水熱時間的長短對於孔洞性質的影響。在第二部分則是利用前一部分所找到的最佳化條件進行 MCM-48 植 Al，利用超音波震盪也可以直接將鋁直接植入在矽壁的骨架裡，且所摻入的矽鋁比能到達 25 的立方體排列的 MCM-48 結構。在第三部分方面，由於奈米金屬顆粒在催化上有相當多的應用，因此在此部分裡使用 SBA-15-10% CES 中孔洞材料當作吸附的基材，並著重在SBA-15利用官能基吸附金屬離子後，如何有效合成出較小 (5 nm以下) 的奈米鉑顆粒。 The thesis is divided into three parts. In part one, a rapid and facile synthesis route to synthesize mesoporous silica MCM-48 with the cubic Ia3d mesostructure has been developed using Gemini surfactant as a template with the aid of ultrasonic irradiation. The present synthesis route effectively reduces the total synthesis time from several days to only one day, which is much shorter than the conventional MCM-48 synthesis methods. We try to investigate the structural property as a function of ultrasonic time or hydrothermal time. The MCM-48 materials were characterized by a variety of techniques including powder X-ray diffraction (XRD), 29Si magic angle spinning (MAS) NMR, transmission electron microscopy (TEM), and scanning electron microscopy (SEM). In part two, we use the optimal condition we have found in the previous part, and we have incorporated aluminum into the MCM-48 silica framework successfully up to a Si/Al ratio of 25. In part three, the mesoporous silica SBA-15 materials containing carboxylic acid groups were used as a support to synthesize Pt nanoparticles. Various Pt loading levels from 3% to 10% on SBA-15 produced Pt nanoparticles with an average particle size of 3 to 4 nm.
Appears in Collections:	[Graduate Institute of Chemistry] Electronic Thesis & Dissertation

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