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Facile Synthesis of Zn-TiO2 Nanostructure, Using Green Tea as an Eco-Friendly Reducing Agent for Photodegradation of Organic Pollutants in Water | ||
| Pollution | ||
| مقاله 12، دوره 4، شماره 4، دی 2018، صفحه 687-696 اصل مقاله (1.02 M) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/poll.2018.252226.392 | ||
| نویسندگان | ||
| F. tavakoli؛ A. Badiei* | ||
| School of Chemistry, College of Science, University of Tehran, Tehran, Iran. | ||
| چکیده | ||
| The present study synthesizes Zn-TiO2 photocatalyst via a simple and economic green rout, in which Green Tea is applied as a green reducing agent due to the presence of polyphenols Molecules. Polyphenol molecules in green tea act as a reductant, thus changing Zn2+ to metallic Zn. The by-produced nanocmposites are characterized by using XRD, FESEM, EDS, and DRS. Zn-TiO2 photocatalyst possesses great efficient charge separation properties. In order to investigate the presence of Zn, different weight ratio of Zn to TiO2 (viz. 5 wt%, 10 wt%, 15 wt%, 20 wt%, 25 wt%, 30 wt%, 35 wt%, 40 wt%, 45 wt%, and 50 wt%) have been synthesized and their performance in Acid Orange 7 (AO7) photodegradation, compared with pure TiO2. According to the results, the compound with 25 wt% Zn shows 97% degradation of AO7 as a model pollutant. Also, it has been shown that after three tests with EDTA, benzoic acid, and under Ar gas, photodegradation of AO7 with Zn-TiO2 photocatalyst mainly depends on photogenerated holes. | ||
| کلیدواژه‌ها | ||
| Zn-TiO2؛ Green Synthesis؛ green tea؛ Photocatalyst؛ Acid Orange 7 | ||
| مراجع | ||
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