In this work, we report on the degradation of methyl-red (2-(4-Dimethylamino-phenylazo)-benzoic acid - C.I. 13020) under UV irradiation in the presence of nanosized ZnO and TiO2. Oxide nanocrystals with controlled size were synthesised by using non-hydrolytic approaches and tested for the photocatalysed degradation. The performances of the immobilised nanoparticles were compared with their commercial counterparts after immobilization onto a solid support. The influence of some experimental conditions, namely pH and dye concentration, were investigated by monitoring the dye decoloration spectrophotometrically. Several intermediate by-products were identified by HPLC-MS, showing that two different mechanisms were operative during the photocatalytic oxidation.
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Research Article|
February 01 2004
Photocatalytic degradation of methyl-red by immobilised nanoparticles of TiO2 and ZnO
R. Comparelli;
1Dipartimento di Chimica, Università di Bari, via Orabona 4, I-70126, Bari, Italy (E-mail: csilrc30@area.ba.cnr.it)
E-mail: csilrc30@area.ba.cnr.it
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P.D. Cozzoli;
P.D. Cozzoli
2Dipartimento di Chimica, Università di Bari, via Orabona 4, I-70126, Bari, Italy (E-mail: csildc28@area.ba.cnr.it)
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M.L. Curri;
M.L. Curri
3CNR IPCF Ð Bari Division c/o Dipartimento di Chimica, Università di Bari, via Orabona 4, I-70126 Bari, Italy (E-mail: csilmc20@area.ba.cnr.it)
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A. Agostiano;
A. Agostiano
4Dipartimento di Chimica, Università di Bari, via Orabona 4, I-70126, Bari, Italy (E-mail: agostiano@area.ba.cnr.it). CNR IPCF - Bari Division c/o Dipartimento di Chimica, Università di Bari, via Orabona 4, I-70126 Bari, Italy (E-mail: csilmc20@area.ba.cnr.it)
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G. Mascolo;
G. Mascolo
5Istituto di Ricerca Sulle Acque, Consiglio Nazionale delle Ricerche, Via F. De Blasio 5, I-70123 Bari, Italy (E-mail: mascolo@area.ba.cnr.it)
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G. Lovecchio
G. Lovecchio
6Istituto di Ricerca Sulle Acque, Consiglio Nazionale delle Ricerche, Via F. De Blasio 5, I-70123 Bari, Italy (E-mail: giangilov@libero.it)
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Water Sci Technol (2004) 49 (4): 183–188.
Citation
R. Comparelli, P.D. Cozzoli, M.L. Curri, A. Agostiano, G. Mascolo, G. Lovecchio; Photocatalytic degradation of methyl-red by immobilised nanoparticles of TiO2 and ZnO. Water Sci Technol 1 February 2004; 49 (4): 183–188. doi: https://doi.org/10.2166/wst.2004.0257
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