Precursor-induced fabrication of β-Bi2O3 microspheres and their performance as visible-light-driven photocatalysts

Wang, Jiali and Yang, Xiaodan and Zhao, Kun and Xu, Pengfei and Zong, Lingbo and Yu, Ranbo and Wang, Dan and Deng, Jinxia and Chen, Jun and Xing, Xianran (2013) Precursor-induced fabrication of β-Bi2O3 microspheres and their performance as visible-light-driven photocatalysts. Journal of Materials Chemistry A, 1 (32). pp. 9069-9074. ISSN 2050-7488

Abstract

Flower-like β-Bi2O3 microspheres with high specific surface area and excellent visible-light-driven photocatalytic activity (for degradation of Rhodamine B) were successfully synthesized via a facile hydrothermal process and subsequent calcination. By precisely adjusting the hydrothermal conditions, the composition and morphology of the microspherical precursors could be well controlled, so that upon further optimized calcination of the precursors, the selective formation of the monoclinic α-Bi2O3 and tetragonal β-Bi2O3 with three dimensional (3D) hierarchical architectures could be achieved. These tetragonal β-Bi2O3 microspheres with an average diameter of 3 μm were constructed by nanoflakes with an average thickness of 50 nm, which, as far as we know, is the first reported result on the 3D hierarchical architectures of tetragonal β-Bi2O3. Its flower-like microspherical architecture made the tetragonal β-Bi2O3 possess not only much improved specific surface area but also a narrower band gap, which significantly enhanced its visible-light-driven photocatalytic activity for the degradation of Rhodamine B (RhB). To further optimize the synthetic conditions and realize the controllable synthesis, the formation mechanism for the morphologies and polymorphs of the Bi2O3 microspheres was discussed in detail.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 25 Sep 2017 05:21
Last Modified: 27 Sep 2017 05:30
Uncontrolled Keywords: controllable synthesis; hierarchical architectures; high specific surface area; hydrothermal conditions; hydrothermal process; photocatalytic activities; visible-light-driven; visible-light-driven photocatalysts; Materials Science; optimization techniques; engineering graphics; rubber and elastomers; chemical agents and basic industrial chemicals; chemical operations; chemical reactions; non mechanical properties and tests of building materials; buildings and towers
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030306 Synthesis of Materials
03 Chemical Sciences > 0306 Physical Chemistry (incl. Structural) > 030601 Catalysis and Mechanisms of Reactions
09 Engineering > 0904 Chemical Engineering > 090402 Catalytic Process Engineering
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1039/c3ta11652b
URI: http://eprints.usq.edu.au/id/eprint/31969

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