Interface Assembly to Magnetic Mesoporous Organosilica Microspheres with Tunable Surface Roughness as Advanced Catalyst Carriers and Adsorbents,ACS Applied Materials & Interfaces

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Interface Assembly to Magnetic Mesoporous Organosilica Microspheres with Tunable Surface Roughness as Advanced Catalyst Carriers and Adsorbents
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-07-23 , DOI: 10.1021/acsami.1c07127
Lei Yu ₁ , Panpan Pan ₁ , Bingjie Yu ₁ , Xuanyu Yang ₁ , Qin Yue ₂ , Abdulaziz A Alghamdi ₃ , Yuan Ren ₁ , Yonghui Deng _{1,

4}

Affiliation

Surface roughness endows microspheres with unique and useful features and properties like improved hydrophobicity, enhanced adhesion, improved stability at the oil–water interface, and superior cell uptake properties, thus expanding their applications. Core–shell magnetic mesoporous microspheres combine the advantages of magnetic particles and mesoporous materials and have exhibited wide applications in adsorption, catalysis, separation, and drug delivery. In this study, virus-like rough core–shell–shell-structured magnetic mesoporous organosilica (denoted as RMMOS) microspheres with controllable surface roughness were successfully obtained through electrostatic interaction-directed interface co-assembly. The obtained RMMOS microspheres possess uniform spherical morphology with tunable surface roughness, radially aligned pore channels with a diameter of 3.0 nm in the outer organosilica shell, high specific surface area (396 m²/g), large pore volume (0.66 cm³/g), high magnetization (35.1 emu/g), and superparamagnetic property. The RMMOS microspheres serve as desirable candidates to support Au nanoparticles (2.5 nm) and show superior catalytic activity and excellent stability in hydrogenation of 4-nitrophenol. In addition, the RMMOS microspheres modified with carboxylic groups further displayed promising performance in convenient adsorption removal of dyes in polluted water.

中文翻译：

表面粗糙度可调的磁性介孔有机二氧化硅微球的界面组装作为高级催化剂载体和吸附剂

表面粗糙度赋予微球独特而有用的特性和特性，如提高疏水性、增强粘附、提高油水界面稳定性和优异的细胞吸收性能，从而扩大其应用。核壳磁性介孔微球结合了磁性颗粒和介孔材料的优点，在吸附、催化、分离和药物输送等方面有着广泛的应用。在这项研究中，通过静电相互作用导向的界面共组装成功获得了具有可控表面粗糙度的病毒样粗糙核壳壳结构磁性介孔有机二氧化硅（表示为RMMOS）微球。获得的 RMMOS 微球具有均匀的球形形态，表面粗糙度可调，² /g）、大孔体积（0.66 cm ³ /g）、高磁化强度（35.1 emu/g）和超顺磁性。RMMOS 微球是支持 Au 纳米粒子 (2.5 nm) 的理想候选材料，并在 4-硝基苯酚的氢化中显示出优异的催化活性和优异的稳定性。此外，羧基修饰的RMMOS微球在方便吸附去除污水中的染料方面进一步显示出良好的性能。

更新日期：2021-08-04

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