Solar and visible active amino porphyrin/SiO2ZnO for the degradation of naphthol blue black
| Autor: | V. Pandiyan, Shaik Abdullah Nawabjan, Abilio J.F.N. Sobral, Balu Krishnakumar, Avula Balakrishna, António Aguiar |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Composite number 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences Porphyrin Silane 0104 chemical sciences Catalysis chemistry.chemical_compound Chemical engineering chemistry Photocatalysis Surface modification General Materials Science Naphthol Blue Black 0210 nano-technology Visible spectrum |
| Zdroj: | Journal of Physics and Chemistry of Solids. 111:364-371 |
| ISSN: | 0022-3697 |
| DOI: | 10.1016/j.jpcs.2017.08.012 |
| Popis: | Although SiO 2 falls in the category of insulator, we used 70% SiO 2 and 30% of ZnO mixture for photocatalytic application. SiO 2 ZnO was prepared by a simple solid dispersion method, before making a mixture of oxides; SiO 2 and ZnO were prepared by a sol-gel and physical grinding methods, respectively. The prepared SiO 2 ZnO was chemically modified with 5,10,15,20- meso -tetra-( para -amino)-phenyl-porphyrin (TPAPP) and used for the degradation of an azo dye naphthol blue black (NBB) under direct sunlight as well as visible light. Before making a TPAPP/SiO 2 ZnO composite, the surface modification of SiO 2 ZnO was carried out with glycidoxypropyltrimethoxy silane (GPTMS) which acts as a coupling agent. The TPAPP modified SiO 2 ZnO was characterized by FT-IR, XRD, SEM, FE-SEM with elemental mapping, EDS and DRS measurements. A mechanism was proposed for NBB degradation by TPAPP/SiO 2 ZnO under sun light. The catalyst was found to be reusable. |
| Databáze: | OpenAIRE |
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