NDLI: Hollow mesoporous SiO<sub>2</sub> sphere nanoarchitectures with encapsulated silver nanoparticles for catalytic reduction of 4-nitrophenol

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Inorganic Chemistry Frontiers Vol - 3 Issue - 4

Inorganic Chemistry Frontiers Vol - 3 Issue - 3

Inorganic Chemistry Frontiers Vol - 3 Issue - 2

Inorganic Chemistry Frontiers Vol -2

Inorganic Chemistry Frontiers Vol -1

Hollow mesoporous SiO₂ sphere nanoarchitectures with encapsulated silver nanoparticles for catalytic reduction of 4-nitrophenol

Content Provider	Royal Society of Chemistry (RSC)
Author	Li, Weiqiang Zhao, Huijun Ding, Hualin Zhang, Yunxia Ding, Qianqian Zhang, Haimin Wang, Guozhong Ge, Xiao Zhang, Hao
Copyright Year	2016
Abstract	Ideally, a superior catalyst should possess high speed, selectivity and stability. However, it is difficult to holistically achieve high speed, selectivity and stability catalysis with modest configured catalyst structures. This work reports a new pre-shell/post-core approach combined with a laser ablation treatment strategy to fabricate a sophisticated catalyst architecture configured with a hollow mesoporous SiO2 (hm-SiO2) sphere shell and multiple encapsulated Ag nanoparticle (NP) yolks (Ag@hm-SiO2). Each Ag@hm-SiO2 nanosphere encapsulates 5–10 Ag NP yolks with an average size of 20 nm, in which the content of silver is about 3.6 wt% based on the inductively coupled plasma measurement. To further enhance the catalytic activity, a laser ablation treatment strategy is innovatively utilized to reduce the sizes of the encapsulated Ag NP yolks and increase their numbers. The catalytic reduction of 4-nitrophenol (4-NP) is used to evaluate the catalytic performance of the fabricated Ag@hm-SiO2 catalyst architecture before and after laser ablation treatment. The laser ablation treated Ag@hm-SiO2 nanospheres demonstrate a three-fold increased catalytic activity towards 4-NP reduction with excellent stability. Such superior catalytic performance could be attributed to the unique structural features of the Ag@hm-SiO2 architecture, in which the mesopore shell provides not only readily accessible pathways for fast transport of reactants to the encapsulated Ag NPs but also an effective protective shield for the encapsulated Ag NPs.
Starting Page	663
Ending Page	670
Page Count	8
File Format	HTM / HTML PDF
ISSN	20521553
Volume Number	3
Issue Number	5
Journal	Inorganic Chemistry Frontiers
DOI	10.1039/c6qi00002a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	NP Ag NP Laser ablation Mesoporous material Nanoparticle Inductively coupled plasma 4-Nitrophenol
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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