Hydrogenation of alkyl-anthraquinone over hydrophobically functionalized Pd/SBA-15 catalysts.
Hydrogenation of alkyl-anthraquinone over hydrophobically functionalized Pd/SBA-15 catalysts.
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疏水功能化 Pd/SBA-15 催化剂上烷基蒽醌的氢化
DOI：
10.1039/c9ra07351e
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发表时间：
2019-10-23
期刊：
影响因子：
3.9
通讯作者：
Zong, Baoning
中科院分区：
文献类型：
--
作者：
Wang, Li;Zhang, Yue;Ma, Qingqing;Pan, Zhiyong;Zong, Baoning
采用共缩合法制备了有机硅烷功能化介孔二氧化硅SBA-15，并将其作为Pd催化剂载体用于2-烷基蒽醌（AQ，烷基=乙基、叔丁基和戊基）加氢。通过X射线衍射、傅里叶变换红外光谱、热重分析、N2吸附-解吸、zeta电位、水接触角测量和透射电子显微镜对所制备的Pd催化剂进行了表征。通过延长二氧化硅源的预水解时间，催化剂中官能团的含量略有增加。然而，zeta 电位和水接触角最初增加，在 2 小时时达到最大值，然后随着预水解时间的进一步延长而下降。有机官能化产生的疏水性对 AQ 氢化具有积极影响。疏水性最高的催化剂表现出最高的催化活性，与未官能化的催化剂相比，乙基、叔丁基和戊基蒽醌的加氢活性分别提高了33.3%、60.0%和150.0%。
Organosilane-functionalized mesoporous silica SBA-15 was prepared by the co-condensation method and then applied as a support of Pd catalysts for hydrogenation of 2-alkyl-anthraquinone (AQ, alkyl = ethyl, tert-butyl and amyl). The as-prepared Pd catalysts were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, N2 adsorption–desorption, zeta potential, water contact angles measurement and transmission electron microscopy. By extending the pre-hydrolysis time of the silica source, the content of functional groups in the catalysts slightly increases. However, there is an initial increase in zeta potential and water contact angles up to a maximum at 2 h, followed by a decrease as the pre-hydrolysis time was further prolonged. The hydrophobicity created by organic functionalization has positive effects on AQ hydrogenation. The catalyst with the highest hydrophobicity exhibits the highest catalytic activity, with increments of 33.3%, 60.0% and 150.0% for hydrogenation of ethyl-, tert-butyl- and amyl-anthraquinone compared with the unfunctionalized one.
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