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<p>Au nanoparticles (Au NPs) were attached to PMMA microspheres using a long-chain ionic liquid with an imidazole headgroup (1-hexadecyl-3-methylimidazolium chloride, IL<sub>16</sub>) as a bridging linker, creating PMMA-IL<sub>16</sub>-Au microspheres. Following this, Au-embedded bimodel porous silica (Au-SiO<sub>2</sub>) has been synthesized via using the obtained PMMA-IL<sub>16</sub>-Au microspheres and IL<sub>16</sub> as double templating agents. The synthesized conditions of PMMA-IL<sub>16</sub>-Au microspheres and biporous Au-SiO<sub>2</sub> were researched by various analytical techniques, such as small-angle XRD, N<sub>2</sub> adsorption, SEM, TEM, and electrophoresis measurements. The coverage of Au NPs on PMMA microspheres can be easily modified by altering the initial mass ratios of <i>m</i>(Au) to <i>m</i>(PMMA). The biporous Au-SiO<sub>2</sub>(1) synthesized had a BET surface area reaching 883 m<sup>2</sup>&#xa0;g<sup>−1</sup>, featuring a macroporous framework, SBA-3 type ordered mesoporous silica walls, and Au nanoparticles evenly distributed on the inner surfaces of the spherical macropores. Moreover, the resultant porous Au-SiO<sub>2</sub>(1) exhibited a good catalytic activity in the reduction reaction of 4-nitrophenol using NaBH<sub>4</sub> as reducer. The IL<sub>16</sub> were found to be an ideal linking and templating agents for the construction of complex polymer microsphere and porous silican materials.</p>

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Construction of PMMA-Au microspheres and Au-Silica with bimodal pore structure by long-chain ionic liquid

  • 期刊论文

  • 发表日期：

    2026年2月23日

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  • Wenyue Jia,
  • Changyan Shao,
  • Reng Xiong,
  • Jun Wang,
  • Liangfei Duan,
  • Tongwen Wang,
  • Jing Shen

摘要

Au nanoparticles (Au NPs) were attached to PMMA microspheres using a long-chain ionic liquid with an imidazole headgroup (1-hexadecyl-3-methylimidazolium chloride, IL16) as a bridging linker, creating PMMA-IL16-Au microspheres. Following this, Au-embedded bimodel porous silica (Au-SiO2) has been synthesized via using the obtained PMMA-IL16-Au microspheres and IL16 as double templating agents. The synthesized conditions of PMMA-IL16-Au microspheres and biporous Au-SiO2 were researched by various analytical techniques, such as small-angle XRD, N2 adsorption, SEM, TEM, and electrophoresis measurements. The coverage of Au NPs on PMMA microspheres can be easily modified by altering the initial mass ratios of m(Au) to m(PMMA). The biporous Au-SiO2(1) synthesized had a BET surface area reaching 883 m2 g−1, featuring a macroporous framework, SBA-3 type ordered mesoporous silica walls, and Au nanoparticles evenly distributed on the inner surfaces of the spherical macropores. Moreover, the resultant porous Au-SiO2(1) exhibited a good catalytic activity in the reduction reaction of 4-nitrophenol using NaBH4 as reducer. The IL16 were found to be an ideal linking and templating agents for the construction of complex polymer microsphere and porous silican materials.