University Of Tehran Press Pollution 2383-451X 4 4 2018 10 01 Facile Synthesis of Zn-TiO2 Nanostructure, Using Green Tea as an Eco-Friendly Reducing Agent for Photodegradation of Organic Pollutants in Water 687 696 67765 10.22059/poll.2018.252226.392 EN F. Tavakoli School of Chemistry, College of Science, University of Tehran, Tehran, Iran. A. Badiei School of Chemistry, College of Science, University of Tehran, Tehran, Iran. Journal Article 2018 02 08 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. https://jpoll.ut.ac.ir/article_67765_6963609b6ca2434e24ba8146814d6c56.pdf