One-pot hydrothermal synthesis of BiVO₄ microspheres with mixed crystal phase and Sm³⁺-doped BiVO₄ for enhanced photocatalytic activity
|Author:||Zhu, Shiwen1; Li, Quanguo1; Huttula, Marko2;|
1College of Chemistry, Key Lab of Environment Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan 411105, China
2Nano and Molecular Materials Research Unit, Faculty of Science, University of Oulu, P.O. Box 3000, 90014 Oulu, Finland
|Online Access:||PDF Full Text (PDF, 1.5 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe201804056342
|Publish Date:|| 2017-10-18
The BiVO₄ microspheres and Sm³⁺-doped BiVO₄ polygons were prepared via a facile hydrothermal method by means of K₆V₁₀O₂₈·9H₂O as a novel vanadium source. Optimized temperature and pH value of prepared BiVO₄ were obtained. The polycrystalline BiVO₄ microspheres prepared at T = 140 °C, pH 4, demonstrates the best photocatalytic activities for degrading dyes under UV radiation. This is resulted due to transfers of photogenerated electrons from tetragonal to monoclinic phases. In contrast to the undoped BiVO₄, the photocatalytic activity of Sm³⁺-doped BiVO₄ polygons is drastically enhanced not only under UV radiation but also under visible light radiation. The optimized Sm content was found to be 10 %. Enhanced efficiency with the doped sample is attributed to the dopants’ role in blocking recombination of photogenerated electron–hole pairs. This work offers a simple route to obtain mixed phase BiVO₄ and provide an effective way to achieve higher photocatalytic activity by doping the Sm³⁺ in the semiconductor catalysts.
Journal of materials science
|Pages:||1679 - 1693|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
114 Physical sciences
116 Chemical sciences
The authors acknowledge with thanks the financial support of the Scientific Research Fund of Hunan Provincial Education Department, China (16B253), the National Natural Science Foundation of China (21343008), and the Open Project Program of State Key Laboratory of Structural Chemistry, China (No. 20150018). M. Huttula acknowledges the financial supports from the Research Council of Natural Sciences of the Academy of Finland, while W. Cao acknowledges with thanks the supports from the Strategic Grant of Oulu University.
© Springer Science+Business Media New York 2016. This is a post-peer-review, pre-copyedit version of an article published in Journal of Materials Science.
The final authenticated version is available online at: http://dx.doi.org/10.1007/s10853-016-0460-0.