Spherical polyelectrolyte brushes as templates to prepare hollow silica spheres encapsulating metal nanoparticles
ID Yang, Qingsong (Author), ID Li, Li (Author), ID Zhao, Fang (Author), ID Wang, Yunwei (Author), ID Ye, Zhishuang (Author), ID Hua, Chen (Author), ID Liu, Zhiyong (Author), ID Bohinc, Klemen (Author), ID Guo, Xuhong (Author)

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Integrating hollow silica spheres with metal nanoparticles to fabricate multifunctional hybrid materials has attracted increasing attention in catalysis, detection, and drug delivery. Here, we report a simple and general method to prepare hollow silica spheres encapsulating silver nanoparticles (Ag@SiO$_2$) based on spherical polyelectrolyte brushes (SPB), which consist of a polystyrene core and densely grafted poly (acrylic acid) (PAA) chains. SPB were firstly used as nanoreactors to generate silver nanoparticles in situ and then used as sacrificial templates to prepare hybrid hollow silica spheres. The resulted Ag@SiO$_2$ composites exhibit high catalytic activity and good reusability for the reduction of 4-nitrophenol to 4-aminophenol by NaBH$_4$. More importantly, this developed approach can be extended to the encapsulation of other metal nanoparticles such as gold nanoparticles into the hollow silica spheres. This work demonstrates that SPB are promising candidates for the preparation of hollow spheres with encapsulated metal nanoparticles and the resulted hybrid spheres show great potential applications in catalysis.

Keywords:spherical polyelectrolyte brush, hollow silica, silver nanoparticles, catalyst
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:ZF - Faculty of Health Sciences
Publication status:Published
Publication version:Version of Record
Number of pages:14 str.
Numbering:Vol. 10, iss. 4, art. 799
PID:20.500.12556/RUL-133741 This link opens in a new window
ISSN on article:2079-4991
DOI:10.3390/nano10040799 This link opens in a new window
COBISS.SI-ID:13011715 This link opens in a new window
Publication date in RUL:13.12.2021
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Shortened title:Nanomaterials
COBISS.SI-ID:523286297 This link opens in a new window


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:21.04.2020


Funder:Other - Other funder or multiple funders
Funding programme:NSFC
Project number:51761135128

Funder:Other - Other funder or multiple funders
Funding programme:NSFC
Project number:51773061

Funder:Other - Other funder or multiple funders
Funding programme:Xinjiang Bingtuan, Key Scientific and Technological Project
Project number:2018AB025

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