功能化氧化石墨烯负载高分散钯纳米粒子的制备及其在水介质中对肉桂醛选择性加氢的研究

Preparation of amino functionalized graphene oxide supported highly dispersed Pd nanoparticles for selective hydrogenation of cinnamaldehyde in aqueous medium

文成龙 ¹剧永玲 ¹刘康 ¹鲁墨弘 ¹李明时 ¹李永昕¹

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作者信息

1. 常州大学石油化工学院,江苏省先进催化材料与技术重点实验室,先进催化与绿色制造协同创新中心,江苏常州 213164
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摘要

利用3-氨丙基三甲氧基硅烷(APTMS)对氧化石墨烯(GO)进行功能化改性得到GO-NH2,再通过水热还原法制备高分散Pd/GO-NH2催化剂,用于肉桂醛(CAL)选择性加氢制氢化肉桂醛(HCAL).结果表明,APTMS的接枝量对CAL选择性加氢性能具有较大影响,当APTMS与GO的质量比[m(APTMS)/m(GO)]≤ 10时,随着m(APTMS)/m(GO)的增大Pickering乳液液滴尺寸逐渐减小,CAL的选择性加氢性能增强;当m(APTMS)/m(GO)＞10时,由于含氧官能团数量有限,接枝量基本保持不变.因此,Pd/GO-NH2-10表现出最高的CAL转化率(99.8％)、HCAL选择性(85.8％)和优异的CAL选择性加氢稳定性.

Abstract

GO-NH2 is obtained through modifying graphene oxide(GO)by 3-aminopropyltrimethoxysilane(APTMS),and then highly dispersed Pd/GO-NH2 catalysts are prepared via hydrothermal method,and applied to selective hydrogenation of cinnamaldehyde(CAL)in aqueous solution.The result suggests that the grafting amount of APTMS affects the performance of the catalysts in selective hydrogenation of CAL.As the mass ratio of APTMS to GO[m(APTMS)/m(GO)]is not more than 10,an increase of[m(APTMS)/m(GO)]in Pd/GO-NH2 catalyst leads to a decrease in the size of Pickering emulsion,which enhances the amount of CAL adsorbed on the catalyst,thereby promoting the selective hydrogenation of CAL.As[m(APTMS)/m(GO)]is greater than 10,the grafting amount of APTMS on GO has hardly changed due to the limited number of oxygen-containing functional groups.Therefore,Pd/GO-NH2-10 exhibits the highest CAL conversion of 99.8％,delivering a HCAL selectivity of 85.8％,as well as excellent stability in selective hydrogenation of CAL.

关键词

高分散钯纳米颗粒/Pickering乳液/氧化石墨烯/3-氨丙基三甲氧基硅烷/肉桂醛选择性加氢

Key words

highly dispersed Pd nanoparticles/Pickering emulsion/graphene oxide/3-aminopropyltrimethoxysilane/selective hydrogenation of cinnamaldehyde

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出版年

2024

现代化工

中国化工信息中心

现代化工

CSTPCD北大核心

影响因子：0.553

ISSN：0253-4320

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