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Open AccessArticle

Immobilization of TiO2 Nanoparticles on Chlorella pyrenoidosa Cells for Enhanced Visible-Light-Driven Photocatalysis

by Aijun Cai 1,2, Aiying Guo 1 and Zichuan Ma 2,*
College of Life Science and Technology, Hebei Normal University of Science & Technology, Qinhuangdao 066600, China
College of Chemistry and Material Sciences, Hebei Normal University, Shijiazhuang 050016, China
Author to whom correspondence should be addressed.
Academic Editor: Walid A. Daoud
Materials 2017, 10(5), 541;
Received: 22 March 2017 / Revised: 4 May 2017 / Accepted: 9 May 2017 / Published: 17 May 2017
(This article belongs to the Special Issue Enhancing the Photocatalytic Activity of TiO2 Photocatalysts)
TiO2 nanoparticles are immobilized on chlorella cells using the hydrothermal method. The morphology, structure, and the visible-light-driven photocatalytic activity of the prepared chlorella/TiO2 composite are investigated by various methods. The chlorella/TiO2 composite is found to exhibit larger average sizes and higher visible-light intensities. The sensitization of the photosynthesis pigment originating from chlorella cells provides the anatase TiO2 with higher photocatalytic activities under the visible-light irradiation. The latter is linked to the highly efficient charge separation of the electron/hole pairs. The results also suggest that the photocatalytic activity of the composite remains substantial after four cycles, suggesting a good stability. View Full-Text
Keywords: TiO2; visible light; photocatalysis TiO2; visible light; photocatalysis
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Cai, A.; Guo, A.; Ma, Z. Immobilization of TiO2 Nanoparticles on Chlorella pyrenoidosa Cells for Enhanced Visible-Light-Driven Photocatalysis. Materials 2017, 10, 541.

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