Fabrication of hierarchical hollow silica/silver/silica/titania composite particles

Hierarchical composite particles with hollow structure were fabricated in this work. The composite particles were composed of guest particles and host ones, which were achieved by Stöber method, and a raspberry-like morphology was produced by the “anchoring” of guest particles on the surface of host...

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Published inJournal of sol-gel science and technology Vol. 77; no. 3; pp. 565 - 573
Main Authors Bai, Chong, Liu, Jin-Qiu, Liu, Wei-Liang, Ren, Man-Man, Liu, Qin-Ze, Wang, Xin-Qiang, Duan, Xiu-Lan, Wu, Yong-Zhong
Format Journal Article
LanguageEnglish
Published New York Springer US 01.03.2016
Springer Nature B.V
Subjects
Anchoring
Catalytic activity
Ceramics
Chemistry and Materials Science
Composites
Field study
Glass
Inorganic Chemistry
Light irradiation
Materials Science
Microscopy
Morphology
Nanotechnology
Natural Materials
Optical and Electronic Materials
Original Paper
Particulate composites
Photocatalysis
Scanning electron microscopy
Silicon dioxide
Structural hierarchy
Surface chemistry
Titanium dioxide
Transmission electron microscopy
Hollow structure
Photocatalytic
Hybrid nanoparticles
Hierarchical morphology
Silica
Raspberry-like
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Summary:Hierarchical composite particles with hollow structure were fabricated in this work. The composite particles were composed of guest particles and host ones, which were achieved by Stöber method, and a raspberry-like morphology was produced by the “anchoring” of guest particles on the surface of host ones. Moreover, the hollow structure was obtained by template-assisted approach. The raspberry-like morphology and hollow structure of composite particles were confirmed by scanning electron microscopy and transmission electron microscopy. As multiple distinct functional components were integrated into the raspberry-like particles, the obtained composite particles exhibited enhanced photocatalytic activity under visible light irradiation. The rate of degradation of the as-prepared composite particles was ca. 13 times faster than that of pure TiO 2 under visible light irradiation. Furthermore, a brief photocatalytic mechanism was presented. The composite particles, combining hierarchical morphology and hollow structure, exhibit promising potential in self-cleaning and nanoreactor areas. Graphical Abstract
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ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-015-3884-0