Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 14, Pages 6531-6539Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp1097553
Keywords
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Funding
- National Natural Science Foundation of China [50872037]
- Natural Science Foundation of Fujian Province [2010J01040]
- Fujian Province University [06FJR01]
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Under the strategies of doping to extend the absorptive response region of a semiconductor and fabricating a heterojunction structure to suppress the recombination of the photogenerated electron hole pairs, a TiO2-pillared Bi-doped hexaniobate nanocomposite was prepared via a solid state reaction and a subsequent exfoliation-restacking route. The as-prepared pillared nanocomposite was characterized by powder X-ray diffraction, scanning electron microscope, X-ray photoelectron spectroscopy, UV-vis, and N-2 adsorption-desorption measurements. It was revealed that the host 2D sheet structure was retained after doping, exfoliation, and restacking. The pillared nanocomposite is mesoporous with a high specific surface area (more than 110 m(2)/g) and shows a good photocatalytic activity in the degradation of methylene blue under visible light irradiation. A photoexcitation model in the semiconductor semiconductor pillared photocatalyst was proposed based on the results of XPS, UV-vis, and photoelectrochemical studies.
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