Broadening the photoresponsive activity of anatase titanium dioxide particles via decoration with partial gold shells

Broadening the photoresponsive activity of anatase titanium dioxide particles via decoration with partial gold shells

© 2017 Elsevier Inc. Titanium dioxide (TiO2) has gained increasing interest in materials research due to its outstanding properties and promising applications in a wide range of fields. From this perspective, we report the synthesis of custom-designed anatase TiO2submicrometer particles coated with...

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Bibliographic Details
Main Authors: Orawan Khantamat, Chien Hung Li, Si Ping Liu, Tingting Liu, Han Ju Lee, Oussama Zenasni, Tai Chou Lee, Chengzhi Cai, T. Randall Lee
Format: Journal
Published: 2018
Subjects:
Chemical Engineering
Materials Science
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85036655387&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/58405
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Institution: Chiang Mai University
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Summary:© 2017 Elsevier Inc. Titanium dioxide (TiO2) has gained increasing interest in materials research due to its outstanding properties and promising applications in a wide range of fields. From this perspective, we report the synthesis of custom-designed anatase TiO2submicrometer particles coated with partial Au shells (ATiO2-AuShl). The synthetic strategy used herein yields uniformly shaped monodisperse particles. Amorphous TiO2core particles were synthesized using template-free oxidation and hydrolysis of titanium nitride (TiN); subsequent hydrothermal treatment generated anatase TiO2(ATiO2) particles. Coating ATiO2particles with partial Au shells was accomplished using a simple seeded-growth method. Evaluation of the optical properties of these ATiO2-AuShl particles showed that these submicrometer composites exhibited an intense absorption peak for TiO2in the UV region (∼326 nm) and a broad extinction band in the visible range (∼650 nm) arising from the incomplete Au shell. These ATiO2-AuShl composite particles provide a unique and effective means for broadening the optical response of TiO2-based nano- and micron-scale materials. The simplicity of our synthetic method should broaden the application of ATiO2-AuShl particles in various visible light-driven technologies.

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