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Issue 57, 2016, Issue in Progress
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Continuous solid solutions of Na0.5La0.5TiO3–LaCrO3 for photocatalytic H2 evolution under visible-light irradiation

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Abstract

A series of continuous (Na0.5La0.5TiO3)1−x(LaCrO3)x solid solutions with orthorhombic-phase perovskite structure and with LaCrO3 contents (x) in the range from 0 to 1.0 were synthesized by a facile polymerized complex method, and were employed as photocatalysts for H2 evolution under visible-light irradiation. It was found that photocatalytic activities of the solid solutions significantly increased with the increase of x to 0.3, and reached the highest H2-evolution rate of 238.2 μmol h−1 gcat−1 on (Na0.5La0.5TiO3)0.7(LaCrO3)0.3, because the narrowed bandgaps of samples enhanced the generation of charge carriers and the increased lattice distortion of samples could promote the separation and migration of charge carriers. Nevertheless, photocatalytic activities of the solid solutions gradually decreased with the further increase of x from 0.3, since both the bandgaps and lattice distortion rarely changed but Cr6+ and defects gradually increased and thus accelerated the recombination of charge carriers.

Graphical abstract: Continuous solid solutions of Na0.5La0.5TiO3–LaCrO3 for photocatalytic H2 evolution under visible-light irradiation

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Publication details

The article was received on 26 Mar 2016, accepted on 21 May 2016 and first published on 27 May 2016


Article type: Paper
DOI: 10.1039/C6RA07891E
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Citation: RSC Adv., 2016,6, 51801-51806
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    Continuous solid solutions of Na0.5La0.5TiO3–LaCrO3 for photocatalytic H2 evolution under visible-light irradiation

    J. Shi, S. Zong, Y. Hu, X. Guan, J. Luo, Y. Shang, G. Li, D. Liu, X. Wang and P. Guo, RSC Adv., 2016, 6, 51801
    DOI: 10.1039/C6RA07891E

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