In:
Journal of Advanced Ceramics, Tsinghua University Press, Vol. 11, No. 7 ( 2022-07), p. 1069-1081
Abstract:
Photocatalytic degradation of organic pollutants is of great significance for wastewater remediation but is still hindered by the poor catalytic efficiency of the catalysts. Herein, we report a strategy to simultaneously introduce piezocatalysis and to enhance the intrinsic photocatalysis in a single catalyst, which improved the performance for catalytic degradation of methylene blue (MB) significantly. Specifically, piezoelectric BiFeO 3 (BFO) nanotube doped with different contents of Gd and La (Bi 0.9 (Gd x La 1− x ) 0.1 FeO 3 ) were produced by electrospinning. The doping led to a higher concentration of surface oxygen vacancy (OV) in Bi 0.9 Gd 0.07 La 0.03 FeO 3 , which effectively increased the piezoelectric field due to the deformation of BFO, and suppressed the recombination of photon-generated electron-hole pairs. The Bi 0.9 Gd 0.07 La 0.03 FeO 3 nanotube showed excellent catalytic performance under simultaneous light irradiation and ultrasonic excitation, giving an extraordinary 95% degradation of MB within 90 min. These findings suggest that the piezoelectric effect combined with defect engineering can enhance the catalytic performance of Bi 0.9 Gd 0.07 La 0.03 FeO 3 nanotube. This could potentially be extended to other catalytic systems for high-performance pollutant treatment.
Type of Medium:
Online Resource
ISSN:
2226-4108
,
2227-8508
DOI:
10.1007/s40145-022-0590-6
Language:
English
Publisher:
Tsinghua University Press
Publication Date:
2022
detail.hit.zdb_id:
2682430-9
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