Enhanced visible-light catalytic degradation of methylene blue by improving adsorption of porous zirconium-based porphyrin MOFs sensitized TiO2 photocatalyst
| Autor: | Daohong Xia, Lijun Zhu, Hou Xinlan, Tian Huo, Xinxin Zhu, Dandan Guo, Chao Zhang, Huiming Zhang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Zirconium
Materials science Mechanical Engineering chemistry.chemical_element Condensed Matter Physics Photochemistry Porphyrin Fluorescence Catalysis chemistry.chemical_compound Adsorption chemistry Mechanics of Materials General Materials Science Absorption (chemistry) Methylene blue Visible spectrum |
| Zdroj: | Journal of Materials Research. 36:2961-2972 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/s43578-021-00303-5 |
| Popis: | The zirconium-based porphyrin MOFs sensitized TiO2 (PCN224–TiO2) was synthesized in situ by self-assembly of porphyrin, ZrCl4 with nano TiO2. The composite catalyst was determined by detailed structural and photoelectrochemical characterization. The UV–Vis absorption and fluorescence spectrum confirm that PCN224 and TiO2 are coupled. The PCN224–TiO2 had significant absorption of visible light and the PCN224–TiO2 had the largest photo-generated current, which proved the porphyrin MOFs material has good internal conductivity and has a close combination with TiO2. Compared with carboxyphenyl porphyrin sensitized TiO2 (HTCPP–TiO2), mixture of TCPP and TiO2 (TCPP/TiO2) and PCN224, the PCN224–TiO2 showed better removal performance of methylene blue under visible light. Under low-power xenon lamp irradiation, the removal rate of PCN224–TiO2 (1:3) on methylene blue reached 93.2% in 4 h. And PCN224–TiO2 had stable cycling catalytic performance. The PCN224–TiO2 promoted the degradation process by strengthening the adsorption of organic pollutants, thus improving the removal performance. |
| Databáze: | OpenAIRE |
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