Photocatalytic degradation of organophosphorus pesticide using semiconductor-sensitized composite in natural water: effect of oxidants
| Autor: | P. Vijayan, A. Franklin Ebenazer, N. Sampathkumar, M. Sivadhayanidhy |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science business.industry Oxide chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen chemistry.chemical_compound Semiconductor chemistry 0103 physical sciences Dichlorvos Photocatalysis Degradation (geology) General Materials Science Fourier transform infrared spectroscopy 0210 nano-technology business Nuclear chemistry Titanium |
| Zdroj: | Applied Physics A. 126 |
| ISSN: | 1432-0630 0947-8396 |
| DOI: | 10.1007/s00339-020-3338-6 |
| Popis: | In this work, dichlorvos was degraded with photocatalytically active n-type semiconductors and p–n junction-type semiconductors. The p–n junction-type semiconductors such as GO–TiO2 (GO = graphene oxide) and GO–WO3 were synthesized by photodeposition method using commercial TiO2 and WO3. GO-doped nano-TiO2 was synthesized through sol–gel technique from titanium(IV) isopropoxide by hydrothermal treatment. The synthesized materials were characterized by different techniques such as XRD, UV, FTIR, SEM and TEM. In order to find out the photocatalytic ability towards degradation of dichlorvos, the experiment was carried out in an aqueous suspension under UV light in the presence of oxygen and oxidants such as H2O2 and K2S2O8. From the evaluation, GO–nano-TiO2 with H2O2 was found to be highly active that showed complete degradation of dichlorvos within 15 min under UV light. |
| Databáze: | OpenAIRE |
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