具胺基中孔洞矽材SBA-1為擔體合成Pt奈米球作為硼烷氨水解氫氣之催化劑及具磺酸性官能基之中孔洞矽材摻雜Ag奈米粒子之催化研究

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/94653

Title:	具胺基中孔洞矽材SBA-1為擔體合成Pt奈米球作為硼烷氨水解氫氣之催化劑及具磺酸性官能基之中孔洞矽材摻雜Ag奈米粒子之催化研究
Authors:	顏姵宜;Yen, Pei-I
Contributors:	化學學系
Keywords:	觸媒;催化;染料降解;水解產氫;中孔洞矽材
Date:	2024-07-11
Issue Date:	2024-10-09 15:21:42 (UTC+8)
Publisher:	國立中央大學
Abstract:	本篇論文研究分為兩部分。第一部分研究中，使用具胺基官能基中孔洞矽材作為模板，製備具有球型鉑奈米金屬，並將其用作催化劑用於氨硼烷(NH3BH3)水解產生氫氣。具胺基官能基中孔洞矽材(SBA-1)命名為NS-1B-10，經由正矽酸四乙酯(TEOS)和3-氨丙基三乙氧基矽烷(APTES)在十六烷基吡啶氯化物(CPC)和聚丙烯酸(PAA)存在下的鹼性條件下共縮合成功合成。透過使用 NaBH4 和 NH3BH3 作為還原劑，並以 K2PtCl4 作為鉑前體，採用雙還原法將鉑奈米顆粒還原在 NS-1B-10 的孔隙中，形成Pt (10)@NS-1B-10。接著使用氫氟酸酸洗蝕刻矽材，形成(Pt (10)@NS-1B-10-Removed)促使材料上Pt含量變多但結構不改變，提升催化活性。透過粉末X射線繞射(XRD)、N2吸附-脫附等溫曲線(BET)、掃描電子顯微鏡(SEM)和穿透電子顯微鏡(TEM)對材料進行鑑定。亦在研究中探討不同濃度(M/AB)、反應溫度以及促進劑NaOH用量等優化條件，以加速硼烷氨水解脫氫反應的進行。經過實驗優化， (Pt (10)@NS-1B-10-Removed) 之Pt樣品球體展現出優異的催化活性，對於 NH3BH¬3 的水解脫水，轉換頻率 (TOF) 為 360 mol H2 min -1 mol Catalyst -1 ，約比Pt 嵌入NS-1B-10 高6 倍(Pt (10)@NS-1B-10)。第二部分研究中，本研究利用直接合成法，將磺酸官能基修飾在中孔洞矽材SBA-15上。透過調整磺酸官能基與TEOS的比例，可合成出S15SX(X=5, 10)的樣品，再摻雜銀奈米粒子。經由BET, SEM, TEM, XRD等儀器鑑定後並應用在催化降解染料上。經過實驗優化，Ag(0.5)@S15S5 此催化劑對於染料均表現出較高的降解效果。 ;Mesoporous silicas SBA-1 functionalized were successfully synthesized via co-condensation of tetraethyl orthosilicate (TEOS) under basic conditions using hexadecyl pyridinium chloride (CPC) and poly(acrylic acid) (PAA) as templates. SBA-1, serving as the starting material, undergoes chemical modification in the presence of 3-aminopropyltriethoxysilane (APTES). The modified product is named NS-1B-10. The Pt NPs were forms inside the pores of SBA-1 by using chemical reduction with aqueous solution of NaBH4 and NH3BH3. The materials were characterized by powder X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms(BET), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The hydrogen production through the hydrolysis of NH3BH3 is catalyzed using a Pt@NS-1B-10 catalyst. In the second part, the direct synthesis method was utilized to modify SBA-15 mesoporous silica with sulfonic acid functional groups. By adjusting the ratio of sulfonic acid functional groups to TEOS, samples designated as S15SX (X=5, 10) were synthesized, followed by the doping of silver nanoparticles. Characterization was performed using BET, SEM, TEM, and XRD techniques, and the materials were applied in catalytic dye degradation. After experimental optimization, the Ag(0.5)@S15S5 catalyst exhibited superior degradation performance for dyes.
Appears in Collections:	[Graduate Institute of Chemistry] Electronic Thesis & Dissertation

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