本文選題：氨基化SBA-15 + KCl　； 參考：《牡丹江師范學(xué)院》2017年碩士論文

【摘要】：SBA-15介孔材料因具有規(guī)則二維六方孔道、較大比表面積和較高水熱穩(wěn)定性而備受學(xué)者青睞。但由于其骨架主要由無(wú)定形SiO2組成,缺少活性中心,所以對(duì)SBA-15進(jìn)行功能化修飾成為重點(diǎn)。本文以三嵌段聚合物P123為模板劑,正硅酸乙酯(TEOS)為無(wú)機(jī)硅源,(3-氨丙基)三乙氧基硅烷(APTES)為有機(jī)偶聯(lián)劑,采用后嫁接法制備了NH2-SBA-15-KCl(n);以三嵌段聚合物P123為模板劑,正硅酸乙酯(TEOS)為無(wú)機(jī)硅源,以有機(jī)硅烷3-巰丙基三甲氧基硅烷(MPTMS)和甲基三乙氧基硅烷(MTES)、正辛基三乙氧基硅烷(OTES)、N-十六烷基三乙氧基硅烷為偶聯(lián)劑,采用直接法在相同條件下分別制備了CH3-SBA-15-SO3H、C8H17-SBA-15-SO3H、C16H33-SBA-15-SO3H。用XRD、FT-IR、N2吸附-脫附和TEM等方法進(jìn)行了表征。實(shí)驗(yàn)表明,NH2-SBA-15-KCl(n)介孔材料成功制備,材料具有很好的吸附功能。當(dāng)pH值為5,吸附時(shí)間為60min,吸附溫度為40℃,nHCl:nKCl=3:7時(shí)對(duì)水中Pb2+吸附效果最好,達(dá)95.56%。疏水基團(tuán)對(duì)反應(yīng)的影響是以改變固體酸CH3(X)-SBA-15-SO3H中疏水基的比例進(jìn)行研究的。結(jié)果顯示,隨著疏水基量增加,樣品疏水性增強(qiáng),酯化率提高。CH3(12%)-SBA-15-SO3H作為催化劑應(yīng)用到乙酸正丁酯的制備反應(yīng)中,酯化率最高達(dá)76.54%;不同鏈長(zhǎng)疏水基團(tuán)對(duì)酯化的影響是以CH3-SBA-15-SO3H、C8H17-SBA-15-SO3H、C16H33-SBA-15-SO3H作為催化劑分別研究的。結(jié)果顯示,隨著疏水基有機(jī)硅烷鏈的增長(zhǎng),樣品疏水性增強(qiáng),酯化率增大。當(dāng)TEOS預(yù)水解時(shí)間為180min時(shí),C16H33-SBA-15-SO3H作為催化劑在乙酸正丁酯的制備反應(yīng)中的酯化率最高可達(dá)88.23%。
[Abstract]:SBA-15 mesoporous materials have attracted much attention due to their regular two-dimensional hexagonal channels, large specific surface area and high hydrothermal stability. However, because the skeleton is mainly composed of amorphous SiO2 and lack of active center, the functionalization of SBA-15 becomes the focus. In this paper, NH _ 2-SBA-15-KCl _ (nn) was prepared by post-grafting method with triblock polymer P123 as template, tetraethyl orthosilicate (TEOS) as inorganic silicon source (3-aminopropyl) triethoxysilane (APTES) as organic coupling agent, and triblock polymer P123 as template. The organic silane 3-mercapto trimethoxysilane (MPT) and methyl triethoxy silane (MTES), octyl triethoxy silane (OTES), hexadecyltriethoxy silane (Cetyltriethoxy silane) were used as the coupling agents, and the organosilane (3-mercaptopropyltrimethoxysilane) and octyltriethoxy silane (OTES) were used as the coupling agents. Ch _ 3-SBA-15-SO _ 3H _ 8H _ (17) SBA-15-so _ 3H _ (10) C _ (16) H _ (33-SBA) _ (15) so _ (3) H were prepared by direct method under the same conditions. The results were characterized by XRD- FT-IRN _ 2 adsorption-desorption and TEM. The results show that the mesoporous material NH2-SBA-15-KCl _ (n) is successfully prepared and the material has good adsorption function. When the pH value is 5, the adsorption time is 60 min, the adsorption temperature is 40 鈩，

本文編號(hào)：1940724