Activated Hydrotalcites Obtained by Coprecipitation as Photocatalysts for the Degradation of 2,4,6-Trichlorophenol
| Autor: | Claudia Martínez Gómez, Alma Hortensia Serafín-Muñoz, Gabriel Herrera-Pérez, Clara Tzompantzi-Flores, Esthela Ramos-Ramírez, Francisco Tzompantzi, Gloria Del Angel, Norma Gutiérrez-Ortega |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Article Subject Hydrotalcite Coprecipitation General Engineering 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Catalysis chemistry.chemical_compound Adsorption chemistry Desorption 2 4 6-Trichlorophenol lcsh:TA401-492 General Materials Science lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology Mesoporous material Photodegradation 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Advances in Materials Science and Engineering, Vol 2018 (2018) |
| ISSN: | 1687-8442 1687-8434 |
| Popis: | A gallery of hydrotalcite-type mesoporous materials with different Mg/Al molar ratios were synthesized by the coprecipitation method. The materials were activated by heat treatment to test their activity in the photodegradation of 2,4,6-trichlorophenol under UV light irradiation. The physicochemical properties of the different synthesized and activated materials were determined using XRD, physical adsorption/desorption of N2, FTIR, SEM, DTA, and TGA. Their banned band energy was determined by UV-Vis to identify their potential to be used as a semiconductor in catalytic photodegradation processes. The results of photodegradation tests of 2,4,6-trichlorophenol showed that hydrotalcites have a high degradation capacity, up to 100% for the catalyst of Mg/Al ratio = 2, with a high mineralization capacity of 80%. The degradation capacity of most of the catalysts tested is mainly due to the presence of holes and the formation of superoxide free radicals, which are the determining species within the degradation mechanism. |
| Databáze: | OpenAIRE |
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