Photodegradation comparison for methyl orange by TiO2, H2O2 and KIO4
The photodegradation of methyl orange in water by the catalyst TiO2 or the oxidants (H2O2, KIO4) or their combination (TiO2 + H2O2, TiO2 + KIO4) under UV light illumination is studied. During the above process, as far as the photodiscoloration degree of methyl orange is concerned, the effect sequenc...
| Publié dans: | Environmental technology. - 1993. - 41(2020), 5 vom: 10. Feb., Seite 547-555 |
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| Auteur principal: | |
| Autres auteurs: | , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2020
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| Accès à la collection: | Environmental technology |
| Sujets: | Journal Article HO· KIO4) Photodegradation methyl orange oxidants (H2O2 photocatalyst (TiO2) Azo Compounds 6B4TC34456 Hydrogen Peroxide plus... |
| Résumé: | The photodegradation of methyl orange in water by the catalyst TiO2 or the oxidants (H2O2, KIO4) or their combination (TiO2 + H2O2, TiO2 + KIO4) under UV light illumination is studied. During the above process, as far as the photodiscoloration degree of methyl orange is concerned, the effect sequence is KIO4 + TiO2 >> KIO4 > TiO2 + H2O2 > TiO2 > H2O2; as far as the photomineralization degree of methyl orange is concerned, the effect sequence is TiO2 ≈ TiO2 + H2O2 > H2O2 > KIO4 + TiO2 >> KIO4; as for the catalysis of TiO2, h+ plays more important role than HO·, the inorganic ions ([Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text]) are generated, especially for the amount of [Formula: see text]. Active HO· is generated, we can measure HO· by terephthalic acid (TA) indirectly: TA reacts with HO· to form highly fluorescent product, namely 2-hydroxyterephthalic acid (TAOH) |
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| Description: | Date Completed 28.01.2020 Date Revised 28.01.2020 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1479-487X |
| DOI: | 10.1080/09593330.2018.1505962 |