高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

[汤心颐先生诞辰100周年纪念专辑] 一步法制备金/介孔二氧化硅复合粒子

韩延东1，杨文胜1，2   

  1. 1. 河南大学纳米科学与工程研究院
    2. 吉林大学化学学院
  • 收稿日期:2025-10-15 修回日期:2025-11-24 网络首发:2025-11-26 发布日期:2025-11-26
  • 通讯作者: 杨文胜 E-mail:wsyang@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号：21773089)、河南省科技攻关项目(批准号：242102230100)和河南省高等学校重点科研项目(批准号：24B150005)资助

One-step Preparation of Au/Mesoporous Silica Composite Particles

HAN YanDong1,YANG WenSheng1，2   

  1. 1. Engineering Research Center for Nanomaterials, Henan University 2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University

  • Received:2025-10-15 Revised:2025-11-24 Online First:2025-11-26 Published:2025-11-26
  • Contact: YANG WenSheng E-mail:wsyang@jlu.edu.cn
  • Supported by:
    Supported by the Natural Science Foundation of China (No. 21773089), the Key Scientific Research Project of Henan Province (No. 24B150005) and the Scientific and Technological Project in Henan Province (No. 242102230100)

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摘要： 本工作以胆碱作为催化剂和还原剂，催化正硅酸四乙酯(TEOS)的水解/缩合反应并还原四氯金酸(HAuCl4)，经一步协同反应过程即可制备出金/介孔二氧化硅复合粒子. 透射电镜和氮气吸附-脱附表征发现，随着胆碱加入后预处理时间由4 min分别延迟到8和15 min，复合粒子的二氧化硅壳层厚度由30 nm递减到20和8 nm；而随着反应介质中十六烷基三甲基溴化铵(CTAB)的使用浓度从2.0 mmol/L升高到8.0 mmol/L，二氧化硅的介孔孔径由2.0 nm增大到2.8 nm；最后，伴随反应介质中水与乙醇的体积比由15:1降至13:3，制备的金/介孔二氧化硅复合粒子中金核数量增多，从单核包覆转变为多核包覆，且催化性能评价显示多核包覆的复合粒子具有更高的催化活性.

关键词: 二氧化硅, 金粒子, 介孔, 复合粒子, 催化性能

Abstract: In this work, choline was employed as both a catalyst and a reducing agent to catalyze the hydrolysis/condensation of tetraethyl orthosilicate and reduce chloroauric acid tetrahydrate. Through a one-step concerted reaction process, successfully prepared Au/mesoporous silica composite particles. Transmission electron microscopy (TEM) and nitrogen desorption characterization revealed that thickness of the mesoporous shell increased from 30 nm to 20 and 8 nm when the pre-treatment time after the addition of choline was delayed from 4 min to 8 and 15 min, respectively. Additionally, when the concentration of cetyltrimethylammonium bromide in the reaction medium increased from 2.0 to 8.0 mmol/L, mesoporous pore diameter of the silica shell increased from 2.0 nm to 2.8 nm. Finally, as the volume ratio of water to ethanol decreased from 15:1 to 13:3, number of the Au particles encapsulated within the mesoporous silica shells could be further adjusted, transitioning from single-core to multi-core encapsulation, and the catalytic results showed that the multi-core encapsulated Au/mesoporous silica composite particles exhibited higher catalytic activity.

Key words: Silica; Au particles, Mesoporous, Composite particles, Catalytic performance

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