A redox-active support for the synthesis of Au@SnO2 core–shell nanostructure and SnO2 quantum dots with efficient photoactivities

Xiaoyang Pan; Wen-Jie Chen; Huizhen Cai; Hui Li; Xue jiao Sun; Bo Weng; Zhiguo Yi

doi:10.1039/D0RA06175A

A redox-active support for the synthesis of Au@SnO₂ core–shell nanostructure and SnO₂ quantum dots with efficient photoactivities†

Xiaoyang Pan,

*^a Wen-Jie Chen,^a Huizhen Cai,^a Hui Li,^a Xue jiao Sun,^a Bo Weng

*^b and Zhiguo Yi

*^c

Author affiliations

* Corresponding authors

^a College of Chemistry and Materials, Quanzhou Normal University, Quanzhou, China
E-mail: xypan@qztc.edu.cn

^b cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
E-mail: bo.weng@kuleuven.be

^c State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
E-mail: zhiguo@mail.sic.ac.cn

Abstract

A defect pyrochlore-type Sn_1.06Nb₂O_5.59F_0.97 (SnNbOF) nano-octahedron is used as a redox-active support for fabricating Au@SnO₂ core–shell and SnO₂ quantum dots at room temperature without the use of organic species or foreign reducing reagents. Gold (Au) and SnO₂ components were obtained through an in situ redox reaction between the HAuCl₄ and reductive Sn²⁺ ions incorporated in SnNbOF. The composition and morphology of the resulting nanocomposites (denoted as Au–SnNbOF) could be controlled by adjusting the Au/SnNbOF ratio. The Au–SnNbOF nanocomposites exhibited efficient photoactivities for methyl orange (MO) degradation under the visible light irradiation (λ > 420 nm), during which the MO was almost completely degraded within 8 min. Among all the samples, the 5wt% Au–SnNbOF nanocomposite had the highest rate constant (0.43 min⁻¹), which was 40 times higher than that of the blank SnNbOF.

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DOI: https://doi.org/10.1039/D0RA06175A
Article type: Paper
Submitted: 15 Jul 2020
Accepted: 28 Aug 2020
First published: 14 Sep 2020
This article is Open Access

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RSC Adv., 2020,10, 33955-33961

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A redox-active support for the synthesis of Au@SnO₂ core–shell nanostructure and SnO₂ quantum dots with efficient photoactivities

X. Pan, W. Chen, H. Cai, H. Li, X. J. Sun, B. Weng and Z. Yi, RSC Adv., 2020, 10, 33955 DOI: 10.1039/D0RA06175A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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A redox-active support for the synthesis of Au@SnO₂ core–shell nanostructure and SnO₂ quantum dots with efficient photoactivities†

Abstract

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A redox-active support for the synthesis of Au@SnO₂ core–shell nanostructure and SnO₂ quantum dots with efficient photoactivities

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