FEATURES OF DIAZO DYE PHOTODECOMPOSITION IN AQUEOUS SOLUTIONS CONTAINING ZINC, ALUMINUM AND ERBIUM SALTS

Evstropyev K.S., Maslennikov S.Yu., Dukelskii K.V., Kolobkova E.V., Nikonorov N.V., Boltenkov I.S., Evstropiev S.K. Features of diazo dye photodecomposition in aqueous solutions containing zinc, aluminum and erbium salts. Scientific and Technical Journal of Information Technologies, Mechanics and Optics , 2019, vol. 19, no. 1, pp. 67–73 (in Russian). doi: 10.17586/2226-1494-2019-19-1-67-73

Subject of research.The features of diazo dye Chicago Sky Blue 6B photodecomposition in aqueous solutions containing the salts of zinc, aluminum and erbium were studied. The paper presents the research of effect of the type and concentration of salts of these metals on the spectral properties of solutions and kinetic dependencies of the decomposition processes of a diazo dye under the action of UV radiation from DRT-240 high-pressure mercury lamp. Method. The methodology of the studies consisted in the sequential measurement of the absorption spectra of the solutions on a Perkin-Elmer Labda 650 spectrophotometer in the UV and visible parts of the spectrum after UV irradiation of various durations and analysis of the observed spectral changes. Main results. Based on the research carried out, it was shown that the absorption spectrum of the dye changes in the presence of metal salts in solutions and an additional maximum appears on the characteristic broad and intense absorption band of the dye in the visible part of the spectrum (λ = 540–680 nm). That fact suggests the behavior of dye molecular structuring. When metal salts are introduced into the solution, the mechanism of its decomposition under the action of UV radiation also changes significantly. In the presence of metal salts, along with a decrease in the intensity of the absorption band of the dye in the visible part of the spectrum, its substantial shift to the shortwave region is also observed. Studies of the dye decomposition kinetics under UV irradiation showed that the rate of the dye photodegradation sharply increases in the presence of metal nitrates in solutions. The introduction of zinc nitrate into the solution has particularly strong effect on the dye photodegradation in an aqueous solution. Practical relivance.The experimental results obtained can be used in the development of photochemical processes for the purification of water from organic pollutants.

1. Сhatterjee D., Dasgupta S. Visible light induced photocatalytic degradation of organic pollutants. Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 2005, vol. 6, no. 2, pp. 186–205. doi: 10.1016/j.jphotochemrev.2005.09.001
2. Warneck P., Wurzinger C. Product quantum yields for the 305-nm photodecomposition of nitrate in aqueous solution. Journal of Physical Chemistry, 1988, vol. 92, no. 22, pp. 6278–6283. doi: 10.1021/j100333a022
3. Minero C., Chiron S., Falletti G., Maurino V., Pelizzetti E., Ajassa R., Carlotti M.E., Vione D. Photochemical processes involving nitrite in surface water samples. Aquatic Sciences, 2007, vol. 69, no. 1, pp. 71–85. doi: 10.1007/s00027-007-0881-6
4. Kiselev V.M., Evstrop’ev S.K., Starodubtsev A.M. Photocatalytic degradation and sorption of methylene blue on the surface of metal oxides in aqueous solutions of the dye. Optics and Spectroscopy, 2017, vol. 123, no. 5, pp. 809–815. doi: 10.7868/S0030403417090173
5. Mohamed R.M., Mkhalid I.A., Al-Thabaiti S.A., Mokhtar Mohamed. Nano Cu metal doped on TiO2-SiO2 nanoparticle catalysts in photocatalytic degradation of direct blue dye. Journal of Nanoscience and Nanotechnology, 2013, vol. 13, no. 7, pp. 4975–4980. doi: 10.1166/jnn.2013.7602
6. Othman I., Tabet M., Farag A. Characterization and photocatalytic activity of sulphated V2O5-ZrO2 catalysts for the degradation of Direct Blue-1 dye. Journal of International Environmental Application and Science, 2012, vol. 7, no. 3, pp. 661–672.
7. El-Bahy Z.M., Ismail A.A., Mohamed R.M. Enhancement of titania by doping rare earth for photodegradation of organic dye (Direct Blue). Journal of Hazardous Materials, 2009, vol. 166, no. 1, pp. 138–143. doi: 10.1016/j.jhazmat.2008.11.022
8. Zavastin D.E., Gherman S., Cretescu I. Removal of Direct Blue dye from aqueous solution using new polyurethane-cellulose acetate blend micro-filtration membrane. Revista de Chimie, 2012, vol. 63, no. 10, pp. 1075–1078.
9. Evstropiev S.K., Karavaeva A.V., Dukelskii K.V., Kiselev V.M., Evstropyev K.S., Nikonorov N.V., Kolobkova E.V. Transparent bactericidal coatings based on zinc and cerium oxides. Ceramics International, 2017, vol. 43, no. 16, pp. 14504–14510. doi: 10.1016/j.ceramint.2017.07.093
10. Zainal Z., Hui L.K., Hussein M.Z., Taufiq-Yap Y.H., Abdullah A.H., Ramli I. Removal of dyes using immobilized titanium dioxide illuminated by fluorescent lamp. Journal of Hazardous Materials, 2005, vol. 125, no. 1-3, pp. 113–120. doi: 10.1016/j.jhazmat.2005.05.013
11. Evstropiev S.K., Karavaeva A.V., Dukelskii K.V., Evstropyev K.S., Nikonorov N.V., Kolobkova E.V. Transparent ZnO-Y2O3 coatings: bactericidal effect in the lighting and in the darkness. Ceramics International, 2018, vol. 44, no. 8, pp. 9091–9096. doi: 10.1016/j.ceramint.2018.02.116
12. Rajendran S., Khan M.M., Gracia F., Qin J., Gupta V.K., Arumainathan S. Ce3+-ion induced visible-light photocatalytic degradation and electrochemical activity of ZnO/CeO2 nanocomposite. Scientific Reports, 2016, vol. 6, no. 1. doi: 10.1038/srep31641

13. Vuppala V., Motappa M.G., Venkata S.S., Sadashivaiah P.H. Photocatalytic degradation of methylene blue using a zinc oxide-cerium oxide catalyst. European Journal of Chemistry, 2012, vol. 3, no. 2, pp. 191–195. doi: 10.5155/eurjchem.3.2.191-195.564
14. Shahmoradi B., Yavari S., Zandsalimi Y., Shivaraju H.P., Negahdari M., Maleki A., Mckay G., Pawar R.R., Lee S.-M. Optimization of solar degradation efficiency of bio-composting leachate using Nd:ZnO nanoparticles. Journal of Phochemistry and Photobiology. A: Chemistry, 2018, vol. 356, pp. 201–211. doi: 10.1016/j.jphotochem.2018.01.002
15. Volkova N.A., Evstropiev S.K., Istomina O.V., Kolobkova E.V. Photolysis of diazo dye in aqueous solutions of metal nitrates. Optics and Spectroscopy, 2018, vol. 124, no. 4, pp. 489–493. doi: 10.1134/S0030400X18040197
16. Boltenkov I.S., Kolobkova E.V., Evstropiev S.K., Dukelskii K.V. Photolysis of Chicago Sky Blue 6B diazo dye in aqueous solutions containing zinc nitrate and samarium nitrate. Journal of Optical Technology, 2018, vol. 85, no. 7, pp. 445–446. doi: 10.1364/JOT.85.000444
17. Pronin I.A., Averin I.A., Donkova B.V., Dimitrov D.T., Pencheva J.A., Moshnikov V.A. Relationship between the photocatalytic and photoluminescence properties of zinc oxide doped with copper and manganese. Semiconductors, 2014, vol. 48, no. 7, pp. 842–847. doi: 10.1134/S1063782614070173
18. Abbott L.C., Batchelor S.N., Oakes J., Lindsay Smith J.R., Moore J.N. Spectroscopic studies of the intermolecular interactions of a Bis-Azo Dye, Direct Blue 1, on Di and trimerization in aqueous solution and in cellulose. Journal of Physical Chemistry B, 2004, vol. 108, no. 36, pp. 13786–13735. doi: 10.1021/jp0485542
19. Serova V.N., Noskova E.N. Optical characteristics and lightfastness of polymer packaging films and paint layers applied on them. Vestnik Tekhnologicheskogo Universiteta, 2016, vol. 19, no. 15, pp. 61–63. (in Russian)
20. Terenin A.N. Photochemistry of Dyes and Related Organic Compounds. Moscow, Nauka Publ., 1947, 343 p. (in Russian)

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