One-pot electrochemical preparation of BiOCl/BiPO{sub 4} double-layer heterojunction film with efficient photocatalytic performance

Journal Article · Sun Oct 15 04:00:00 EDT 2017 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.06.009· OSTI ID:22730417

Hu, Yingyuan; Jia, Zehui; Lv, Rui ^[1]; Fan, Caimei ^[1]; Zhang, Hui ^[2]

---

1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024 (China)
2. Particle Technology Research Centre, Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario N6A 5B9 (Canada)

Highlights: • A novel BiOCl/BiPO{sub 4} heterojunction film has been synthesized by one-pot electrochemical method. • The as-prepared BiOCl/BiPO{sub 4} heterojunction film exhibited high photocatalytic activity and stability. • The plausible formation process of BiOCl/BiPO{sub 4} heterojunction film has been proposed and demonstrated. • The photocatalytic mechanism of phenol degradation presented by BiOCl/BiPO{sub 4} heterojunction film was investigated and analyzed. - Abstract: A BiOCl/BiPO{sub 4} double-layer heterojunction film on metal Bi plate with reduced recombination of photo-induced carriers has been successfully prepared by one-step electrochemical anodization process. The morphology characterizations displayed that the double-layer film consisted of BiPO{sub 4} rods array at the bottom and BiOCl nanosheets on the top. Meanwhile, the control experiments indicated that the BiPO{sub 4} rods array was transformed by BiOCl rather than Bi{sup 3+} reacting with PO{sub 4}{sup 3−} directly. In addition, the resulting BiOCl/BiPO{sub 4} heterojunction film exhibited excellent photocatalytic activity and stability on the degradation of phenol comparing with pure BiOCl film. Transient photocurrent measurements and PL spectra proved that the enhanced photocatalytic performance of BiOCl/BiPO{sub 4} heterojunction film was attributed to the effective separation of photo-generated electron-hole pairs excited on BiOCl. Moreover, ·O{sub 2}{sup −} and ·OH played a crucial role in the photodegradation process of phenol. Based on these analytical results, a plausible photocatalytic mechanism has been proposed.

• OSTI ID: 22730417
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 94; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH IONS
BISMUTH PHOSPHATES
ELECTROCHEMISTRY
HETEROJUNCTIONS
PHENOL
PHOTOCATALYSIS
SEMICONDUCTOR MATERIALS
THIN FILMS
X-RAY DIFFRACTION