Degradação fotocatalítica de atrazina na presença de catalisadores nanoparticulados
| Autor: | Franco Cesar Belchior da Silva, Victor Souza Medeiros, Adriene de Cássia Branquinho, Flávio Arantes Campos, Andréa Rodrigues Chaves, Rômulo Davi Albuquerque Andrade, Ana Carolina Ribeiro Aguiar |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Química Nova, Vol 40, Iss 1, Pp 36-41 Química Nova v.40 n.1 2017 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ Química Nova, Volume: 40, Issue: 1, Pages: 36-41, Published: JAN 2017 |
| ISSN: | 1678-7064 0100-4042 |
| DOI: | 10.21577/0100-4042.20160148 |
| Popis: | Atrazine is a persistent herbicide and several studies have detected their presence in drinking water sources. In this work the atrazine photocatalytic degradation was investigated in aqueous solution using TiO2, ZnO and TiO2/ZnO catalysts. The catalysts were synthesized by Pechini's method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The process was monitored using absorption spectroscopy in ultraviolet and visible (UV-vis) region and high performance liquid chromatography (HPLC). The prepared catalysts were used in ultrafine powder form and its characterization showed nanometer order particle sizes. The atrazine absorbance decrease was observed after samples irradiation in catalysts presence and HPLC analysis showed a significant herbicide reduction and other compounds formation as degradation products. The ZnO catalyst use was more effective in atrazine molecule degradation compared to the other nanoparticles. |
| Databáze: | OpenAIRE |
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