Photocatalytic Degradation of Methyl Orange over Metalloporphyrins Supported on TiO2 Degussa P25

doi:10.3390/molecules17021149

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Molecules 2012, 17(2), 1149-1158; doi:10.3390/molecules17021149

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Photocatalytic Degradation of Methyl Orange over Metalloporphyrins Supported on TiO₂ Degussa P25

Xian-Tai Zhou, Hong-Bing Ji* and Xing-Jiao Huang

School of Chemistry and Chemical Engineering, Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, Sun Yat-sen University, 510275, Guangzhou, China

* Author to whom correspondence should be addressed.

Received: 21 November 2011; in revised form: 11 January 2012 / Accepted: 16 January 2012 / Published: 25 January 2012

(This article belongs to the Special Issue Tetrapyrroles, Porphyrins and Phthalocyanine)

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Abstract: The photocatalytic activity of meso-tetraphenylporphyrins with different metal centers (Fe, Co, Mn and Cu) adsorbed on TiO₂ (Degussa P25) surface has been investigated by carrying out the photodegradation of methyl orange (MO) under visible and ultraviolet light irradiation. The photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance UV (DRS-UV-vis) and infrared spectra. Copper porphyrin-sensitized TiO₂ photocatalyst (CuP-TiO₂) showed excellent activity for the photodegradation of MO whether under visible or ultraviolet light irradiation. Natural Bond Orbital (NBO) charges analysis showed that methyl orange ion is adsorbed easier by CuP-TiO₂ catalyst due to the increase of induced interactions.

Keywords: metalloporphyrins; photocatalytic; methyl orange; degradation

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MDPI and ACS Style

Zhou, X.-T.; Ji, H.-B.; Huang, X.-J. Photocatalytic Degradation of Methyl Orange over Metalloporphyrins Supported on TiO₂ Degussa P25. Molecules 2012, 17, 1149-1158.

AMA Style

Zhou X-T, Ji H-B, Huang X-J. Photocatalytic Degradation of Methyl Orange over Metalloporphyrins Supported on TiO₂ Degussa P25. Molecules. 2012; 17(2):1149-1158.

Chicago/Turabian Style

Zhou, Xian-Tai; Ji, Hong-Bing; Huang, Xing-Jiao. 2012. "Photocatalytic Degradation of Methyl Orange over Metalloporphyrins Supported on TiO₂ Degussa P25." Molecules 17, no. 2: 1149-1158.

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