TY - JOUR
T1 - Ag2O@BiFeO3 heterostructure composite coupling built-in electric field with piezopotential for enhanced photocatalytic pollutant degradation and photoelectrochemical water splitting
AU - Tran, Van Ty
AU - Chen, Dong Hwang
N1 - Funding Information:
The authors thank the Ministry of Science and Technology (MOST), Taiwan for financial support of this research under Contract No. MOST 108-2221-E-006-156-MY3 and MOST 111-2221-E-006-010. The authors also thank for the help of Dr. Nguyen Thi Nghi Nhan (Department of Materials Science and Engineering, National Cheng Kung University) in the UPS measurement.
Funding Information:
The authors thank the Ministry of Science and Technology (MOST), Taiwan for financial support of this research under Contract No. MOST 108-2221-E-006-156-MY3 and MOST 111-2221-E-006-010. The authors also thank for the help of Dr. Nguyen Thi Nghi Nhan (Department of Materials Science and Engineering, National Cheng Kung University) in the UPS measurement.
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/7/15
Y1 - 2023/7/15
N2 - Formation of p–n heterojunction is an effective strategy in developing the high performance photocatalysts with wide-spectrum response and efficient separation of photogenerated carriers. Coupling with piezoelectric potential can further drive the separation of photogenerated charges to improve the photocatalytic activity. So, a heterostructure of p-Ag2O nanoparticles and n-BiFeO3 nanowires was fabricated as a novel piezo-photocatalyst. The formation of p–n heterojunction was demonstrated and the associated energy band diagram was constructed. As compared to the individual BiFeO3 and Ag2O, the heterostructure exhibited significantly higher rate constants for photocatalytic degradation of Rhodamine B (5.70 and 2.05 times) and tetracycline (2.4 and 1.4 times), and photocurrent density for photoelectrochemical water splitting (3.75 and 2.50 times) under visible-near-infrared irradiation because the formed p–n heterojunction promoted the efficient utilization of light and the built-in electric field in the depletion region helped the separation of photoexcited electron−hole pairs. Furthermore, the rate constants for Rhodamine B/tetracycline and photocurrent density could be further enhanced (2.18/1.99 and 1.38 times) by simultaneous ultrasonication owing to the piezoelectric polarization in BiFeO3 nanowires which also boosted the separation of photoinduced charges. Accordingly, the novel Ag2O@BiFeO3 heterostructure has been successfully developed as a promising piezo-photocatalyst for organic pollutant degradation and photoelectrochemical water splitting.
AB - Formation of p–n heterojunction is an effective strategy in developing the high performance photocatalysts with wide-spectrum response and efficient separation of photogenerated carriers. Coupling with piezoelectric potential can further drive the separation of photogenerated charges to improve the photocatalytic activity. So, a heterostructure of p-Ag2O nanoparticles and n-BiFeO3 nanowires was fabricated as a novel piezo-photocatalyst. The formation of p–n heterojunction was demonstrated and the associated energy band diagram was constructed. As compared to the individual BiFeO3 and Ag2O, the heterostructure exhibited significantly higher rate constants for photocatalytic degradation of Rhodamine B (5.70 and 2.05 times) and tetracycline (2.4 and 1.4 times), and photocurrent density for photoelectrochemical water splitting (3.75 and 2.50 times) under visible-near-infrared irradiation because the formed p–n heterojunction promoted the efficient utilization of light and the built-in electric field in the depletion region helped the separation of photoexcited electron−hole pairs. Furthermore, the rate constants for Rhodamine B/tetracycline and photocurrent density could be further enhanced (2.18/1.99 and 1.38 times) by simultaneous ultrasonication owing to the piezoelectric polarization in BiFeO3 nanowires which also boosted the separation of photoinduced charges. Accordingly, the novel Ag2O@BiFeO3 heterostructure has been successfully developed as a promising piezo-photocatalyst for organic pollutant degradation and photoelectrochemical water splitting.
UR - http://www.scopus.com/inward/record.url?scp=85151752767&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85151752767&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2023.157175
DO - 10.1016/j.apsusc.2023.157175
M3 - Article
AN - SCOPUS:85151752767
SN - 0169-4332
VL - 625
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 157175
ER -
