Facile synthesis and photocatalytic activity of La-doped BiOCl hierarchical, flower-like nano-/micro-structures

Journal Article · Thu Feb 15 00:00:00 EST 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.10.013· OSTI ID:22805393

Xu, Keke ^[1]; Fu, Xiuli ^[1]; Peng, Zhijian ^[2]

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1. State Key Laboratory of Information Photonics and Optical Communications, and School of Science, Beijing University of Posts and Telecommunications, Beijing 100876 (China)
2. School of Science, China University of Geosciences, Beijing 100083 (China)

Highlights: • Novel La-doped BiOCl flower-like hierarchical films. • Greatly enhanced photocatalytic degradation effect on dyes. • Specific growth mechanism was proposed. • Photocatalysis mechanism was proposed. - Abstract: A series of La-doped BiOCl hierarchical, flower-like nano-/micro-structures (NMFs) with ginkgo-leaf-like “petals” were prepared by etching La-doped Bi{sub 2}O{sub 3} films in HCl solution at room temperature. For the La-doped Bi{sub 2}O{sub 3} films, they were fabricated through hot-dipping Bi{sub 2}O{sub 3} thin films in La{sub 2}O{sub 3} powder at 650 °C. Microstructure examination revealed that the ginkgo-leaf-like La-doped BiOCl petals have a multilayered structure consisting of several ultra-thin nanosheets with different radii due to the external-to-internal etching process. The investigation on their formation mechanism revealed that the La-doped BiOCl hierarchical NMFs grew anisotropically through Ostwald ripening mechanism. Besides, the photodegradation of rhodamine B under simulated sunlight irradiation revealed that the La-doped BiOCl hierarchical NMFs possessed higher performance than pure BiOCl sample. And the active species trapping tests indicated that the photogenerated holes were the main active radicals for the degradation of rhodamine B.

• OSTI ID: 22805393
• Journal Information: Materials Research Bulletin, Vol. 98; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH CHLORIDES
BISMUTH OXIDES
CRYSTAL GROWTH
DOPED MATERIALS
ETCHING
HOLES
HOT DIPPING
IRRADIATION
LANTHANUM OXIDES
MICROSTRUCTURE
NANOSTRUCTURES
PHOTOCATALYSIS
POWDERS
RADICALS
RHODAMINES
SHEETS
SOLAR RADIATION
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
THIN FILMS