Preparation of Layered K4Nb6O17 and its Photocatalytic Activity for Hydrogen Production

Wen Quan Cui; Yan Fei Liu; Jin Shan Hu; Ying Hua Liang

doi:10.4028/www.scientific.net/AMR.399-401.1506

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 399-401Preparation of Layered K4Nb6O17 and its...

Preparation of Layered K₄Nb₆O₁₇ and its Photocatalytic Activity for Hydrogen Production

Abstract:

The K4Nb6O17 powders were synthesized via a high temperature solid phase reaction and the effects of calcination temperature and calcination time were investigated. The powers were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and ultraviolet-visible diffuse reflection spectra (UV-VIS). The photocatalytic properties of these catalysts for hydrogen production were also investigated in the presence of Na₂S and Na₂SO₃ sacrificial reagents. The results revealed that the optimal synthesis condition is calcination for 2h under 1000°C. Grain-like particles could be obtained with a rapid temperature rising rate, while rod-like particles were obtained with a slow rate. The K₄Nb₆O₁₇ sample exhibited high activities for photocatalytic hydrogen production under UV light, and the highest activity of 95.4 mmol/(g cat) was achieved over the sample which at 1000°C for 2h with the temperature rising rate of 20°C/min.

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Advanced Materials Research (Volumes 399-401)

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1506-1509

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.399-401.1506

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Online since:

November 2011

Authors:

Wen Quan Cui, Yan Fei Liu, Jin Shan Hu, Ying Hua Liang

Keywords:

Calcination, Hydrogen Production, K₄Nb₆O₁₇, Photocatalysis

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