Synergistic effect of TiO2-CuWO4 on the photocatalytic degradation of atrazine
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In this work, CuWO4 is prepared and its effect of improving photocatalytic degradation of atrazine by TiO2 as well as the synergetic mechanism is studied. Results show that the addition of CuWO4 (50 mg/L) into the reaction system can significantly enhance the efficiency of atrazine degradation, resulting in an increased degradation efficiency of 92.1% after 270 min, which is 1.94 times higher than that of the single TiO2. As the sintering temperate of CuWO4 was increased, the degradation efficiency of atrazine increased initially and then deceased after reaching a maximum at 500 °C. The origin of the synergistic effect of TiO2-CuWO4 is attributed to the introduction of solid CuWO4. The photochemical test results indicate that the photogenerated electrons transfer from irradiated TiO2 to CuWO4, which is beneficial to the O2 reduction and H2O2 formation in aqueous solution thus promoting the photocatalytic activity of TiO2. These observations unveil the importance of improving photocatalytic activity of TiO2 with Cu-bearing semiconductors.
KeywordsPhotocatalysis Atrazine CuWO4 Synergistic effect
This work was financially supported by the 2017 Shenzhen Science and Technology Program (JCYJ20170306144117642).
- Palanisamy B, Babu CM, Sundaravel B, Anandan S, Murugesan V (2013) Sol-gel synthesis of mesoporous mixed Fe2O3/TiO2 photocatalyst: application for degradation of 4-chlorophenol. J Hazard Mater 252:452–455Google Scholar
- Hassan K, Sayed KS (2016) Photocataltyic degradation of methyl orange and cyanide by using TiO2/CuO composite. Desalin Water Treat:1–10Google Scholar
- Dalrymple OK (2007) Removing pharmaceuticals and endocrine-disrupting compounds from wastewater by photocatalysis. J Chem Technol Biotechnol 82:122–143Google Scholar
- Lei N, Wang L, Zhu H (2016) Photocatalytic reductive degradation of polybrominated diphenyl ethers on CuO/TiO2 nanocomposites: a mechanism based on the switching of photocatalytic reduction potential being controlled by the valence state of copper. Appel Catal B-Environ 182:414–423CrossRefGoogle Scholar
- Zhao W, Zhu B, Dong J, Song J (2012) Photocatalytic properties of Au/Ti02 prepared by impregnation and deposition method. Mater Rev 26:27–30Google Scholar
- Liu Y, Peng B, Chai L, Liu L (2009) Surface modification of silver-doped nanometer titania with stearic acid. TSM Press, San Francisco, pp 19–22Google Scholar
- Li Y, Cao T, Wang C, Shao C (2011) Fabrication and enhanced photocatalytic properties of heterostructures SnO2/TiO2 composite nanofibers. Chem J Chinese U 32:822–827Google Scholar