本文選題：氨基功能化 + 多孔材料　； 參考：《齊魯工業(yè)大學(xué)》2015年碩士論文

【摘要】：氨基功能化的多孔材料在吸附、催化、分離等應(yīng)用中表現(xiàn)出遠(yuǎn)優(yōu)于未改性的多孔材料,使其應(yīng)用價值得以提高,并且在一些新領(lǐng)域被廣泛的應(yīng)用。因此開發(fā)具有氨基功能的多孔材料備受關(guān)注。本論文將SBA-15和活性炭進(jìn)行表面改性,制備出具有氨基基團(tuán)的SBA-15和活性炭。同時,利用紅外光譜、X射線衍射、熱重、氮?dú)馕摳胶铜h(huán)境掃描電子顯微鏡等測試方法對改性材料進(jìn)行了表征。以正硅酸乙酯作為硅源,通過水熱法合成出SBA-15。使用濃鹽酸對SBA-15進(jìn)行活化,活化后SBA-15表面的羥基相對含量增多。采用3-氨基丙基三乙氧基硅烷對活化過的SBA-15進(jìn)行嫁接修飾,制備出具有氨基有機(jī)基團(tuán)的SBA-15介孔材料。測試結(jié)果表明,氨基有機(jī)基團(tuán)被成功的鏈接到SBA-15的表面,并保持了SBA-15原有的優(yōu)良的結(jié)構(gòu)性能,氨基功能化后氨基有機(jī)基團(tuán)占總重比達(dá)到14%。二氧化碳程序升溫脫附測試表明,氨基功能化的SBA-15具有氨基基團(tuán)的優(yōu)良性能,對二氧化碳的吸附強(qiáng)度是未修飾過的SBA-15的4倍。將活性炭在強(qiáng)氧化劑的溶液中進(jìn)行氧化處理,制備出具有眾多可修飾的含氧官能團(tuán)的氧化活性炭。之后對氧化過的活性炭依次使用二氯亞砜和乙二胺處理,制備出氨基功能化的活性炭。測試結(jié)果表明,氨基有機(jī)基團(tuán)被成功的嫁接到了活性炭的表面,氨基功能化的活性炭保持了活性炭原有的優(yōu)良的結(jié)構(gòu)性能,并且仍然具有良好的高熱穩(wěn)定性,氨基基團(tuán)分解溫度在430℃以上。采用浸漬還原法制備了氨基功能化的活性炭負(fù)載鈀粒子的催化劑。通過X射線衍射測試表明,鈀粒子完好的負(fù)載到其表面。建立了氨基功能化的活性炭作為固體載體的貴金屬鈀催化劑催化還原模型。以硝基苯作為催化還原對象,硼氫化鈉為還原劑,測試結(jié)果表明,在8分鐘內(nèi),99%硝基苯轉(zhuǎn)換為苯胺。測試了催化劑重復(fù)使用性,實驗結(jié)果表明,此催化劑在5個循環(huán)周期中的使用都可以使硝基苯的轉(zhuǎn)化率達(dá)到99%。此外,對氨基功能化的活性炭吸附鈀離子的性能進(jìn)行研究,結(jié)果表明,固體載體的高吸附量能有利于提高催化劑的催化效率。
[Abstract]:Amino-functionalized porous materials are much better than unmodified porous materials in adsorption, catalysis, separation and so on, and have been widely used in some new fields. Therefore, the development of porous materials with amino function has attracted much attention. In this paper, the surface modification of SBA-15 and activated carbon was carried out to prepare SBA-15 and activated carbon with amino groups. At the same time, the modified materials were characterized by infrared X-ray diffraction, thermogravimetry, nitrogen adsorption and desorption, and environmental scanning electron microscopy. SBA-15 was synthesized by hydrothermal method using ethyl orthosilicate as silicon source. SBA-15 was activated by concentrated hydrochloric acid, and the relative content of hydroxyl groups on the surface of SBA-15 increased after activation. SBA-15 mesoporous materials with amino organic groups were prepared by grafting the activated SBA-15 with 3-aminopropyl triethoxy silane. The results showed that the amino organic group was successfully linked to the surface of SBA-15 and maintained the original excellent structure and performance of SBA-15. The ratio of amino organic group to total weight reached 14% after amino functionalization. The temperature programmed desorption test of carbon dioxide showed that the amino functionalized SBA-15 had excellent properties of amino group and the adsorption intensity of carbon dioxide was 4 times as much as that of unmodified SBA-15. The activated carbon was oxidized in the solution of strong oxidant, and the oxidized activated carbon with many modified oxygen functional groups was prepared. The oxidized activated carbon was then treated with dichloro sulfoxide and ethylenediamine in order to prepare amino functionalized activated carbon. The results showed that the amino organic group was successfully grafted to the surface of the activated carbon, and the amino functionalized activated carbon maintained the original excellent structural properties of the activated carbon and still had good thermal stability. The decomposition temperature of amino group is over 430 鈩，

本文編號：1920091