Fabrication of bismuth titanate nanosheets with tunable crystal facets for photocatalytic degradation of antibiotic

The synergism between different surface facets of semiconductor with optimal ratios can contribute to obtain enhanced photocatalytic degradation performance. Herein, a bismuth-based material Bi 4 Ti 3 O 12 exposed with {001} top facets and {010}/{100} lateral facets was prepared by the molten-salt m...

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Bibliographic Details
Published in:Journal of materials science 2019-11, Vol.54 (21), p.13740-13752
Main Authors: Wang, Juan, Liu, Wenwen, Zhong, Dongling, Ma, Yongjin, Ma, Quanyin, Wang, Ziyu, Pan, Jun
Format: Article
Language:English
Subjects:
Antibiotics
Bismuth titanate
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Comparative analysis
Crystallography and Scattering Methods
Ethylenediaminetetraacetic acid
Exposure
Materials for Life Sciences
Materials Science
Nanosheets
Performance degradation
Photocatalysis
Photodegradation
Polymer Sciences
Solid Mechanics
Synthesis
Tetracycline
Tetracyclines
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Summary:The synergism between different surface facets of semiconductor with optimal ratios can contribute to obtain enhanced photocatalytic degradation performance. Herein, a bismuth-based material Bi 4 Ti 3 O 12 exposed with {001} top facets and {010}/{100} lateral facets was prepared by the molten-salt method. More importantly, the ratio of different exposed facets could be controlled by adjusting the synthesis temperature of molten-salt synthesis process. The as-prepared Bi 4 Ti 3 O 12 exposed with the optimal ratio of {001} top facets to {010}/{100} lateral facets exhibited the enhanced degradation activity of tetracycline hydrochloride (TC-HCl) under irradiation. The rate constant of optimal sample reached 0.904% min −1 , over 3.3 times as compared with that of the counterpart with higher proportion of {001} facets. Besides, active species trapping experiments, photoelectrochemical measurements and selective photodeposition tests were used to illuminate the photocatalytic degradation mechanism. According to that, the enhanced degradation activity could be ascribed to crystal facet synergism which can promote photoinduced carrier separation. This work can give insights into designing and constructing other two-dimensional (2D) bismuth-based materials with the aim of enhancing photocatalytic degradation performance.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-019-03882-1