High Reusability of Catalytically Active Gold Nanoparticles Immobilized in Core-Shell Hydrogel Microspheres
High Reusability of Catalytically Active Gold Nanoparticles Immobilized in Core-Shell Hydrogel Microspheres
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DOI：
10.1021/acsomega.8b00819
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发表时间：
2018-06-01
期刊：
影响因子：
4.1
通讯作者：
Suzuki, Daisuke
中科院分区：
文献类型：
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作者：
Kureha, Takuma;Nagase, Yasuhisa;Suzuki, Daisuke
以催化活性为指标，考察了核表面修饰金纳米粒子的核壳杂化微凝胶的重复使用性能。由刚性核和水溶胀的凝胶壳组成的杂化核壳微凝胶赋予固定化金纳米粒子高的分散稳定性，从而导致优异的催化活性。与游离Au纳米粒子和常规杂化微凝胶（其中Au纳米粒子随机分布在整个微凝胶模板上）相比，杂化核-壳微凝胶的水凝胶壳部分抑制了单个微凝胶中微凝胶和Au纳米粒子之间的聚集，这提高了催化反应的可重复使用性。这项研究的结果应有助于开发先进的催化剂系统，需要高的可重复使用性，即使当化学反应发生在水溶液和外部刺激的应用。
The reusability of hybrid core-shell microgels, whose core surfaces were decorated with gold nanoparticles, was investigated in terms of catalysis activity. Hybrid core-shell microgels composed of a rigid core and water-swollen gel shell endowed the immobilized gold nanoparticles with a high dispersion stability, which resulted in excellent catalytic activity. In contrast to free Au nanoparticles and conventional hybrid microgels, where the Au nanoparticles are randomly distributed over the entire microgel templates, the hydrogel shell part of the hybrid core-shell microgels suppressed the aggregation between the microgels and Au nanoparticles in individual microgels, which improved the reusability for the catalysis reaction. The results of this study should help to develop advanced catalyst systems that require high reusability even when the chemical reactions occur in aqueous solution and external stimuli are applied.