Assessment of the Photocatalytic Efficiency of TiO₂ in the Presence of Sulphate

Abstract:

The use of salts on the degradation of toxic substances may cause the acceleration or delay of radicals production originating from the degradation process. This work had as its objective to investigate the presence and absence of potassium sulphate salt on the photocatalysis of Bentazone using TiO2 as a catalyzer. The effect of the sulphate ion on the photodegradation of the Bentazone herbicide was studied using concentrations of 0,05; 0,10 and 0,20 g L-1 with 0,5 g L-1 of TiO2, in suspension of 180 mL from bentazone solution (3,0x10-5 mol L-1). The samples were analyzed through UV-Vis spectroscopy. The presence of sulphate ions presented a difference of 3,3% on the degradation of bentazone in comparison to TiO2 alone.

• Periodical: Materials Science Forum (Volume 930)
• Pages: 589-593
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.930.589
• Online since: September 2018
• Authors: Lucas Italo Freitas Pinto*, Alexandro de Sousa Sá, Valdeci Bosco dos Santos, Edson Cavalcanti Silva Filho, Josy Antoveli Osajima
• Keywords: Bentazone, Photocatalysis, Potassium Sulphate, Titanium Dioxide

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