Journal
APPLIED SURFACE SCIENCE
Volume 457, Issue -, Pages 104-114Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.06.153
Keywords
Internal polar electric field; Z-scheme; Bi2WO6; BiPO4; Photocatalytic activity
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Funding
- National Natural Science Foundation of China [51772180]
- Academic Leaders Funding Scheme of Shaanxi University of Science Technology [2013XSD06]
- Graduate Innovation Fund of Shaanxi University of Science Technology [SUST-A04]
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Bi2WO6/BiPO4 Z-scheme photocatalysts were prepared via an ultrasonic chemical method. The internal polar electric fields of Bi2WO6 and BiPO4 induced an external electric field between the two materials, generating P-O-W bonds at the interfaces and anchoring the (2 0 0) facets of BiPO4 to the (2 0 0) facets of Bi2WO6. Thus, Bi2WO6/BiPO4 Z-scheme heterojunctions were formed at the interfaces. Under simulated solar-light irradiation, the Bi2WO6/BiPO4 Z-scheme photocatalysts exhibited an enhanced dye decoloration rate, which reached approximately 1.88 times and 4.29 times higher than those of Bi2WO6 and BiPO4, respectively. Bi2WO6/BiPO4 Z-scheme photocatalysts can degrade methylene blue with higher efficiency and more thoroughly than Bi2WO6 .
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