The MOF+Technique: A Significant Synergic Effect Enables High Performance Chromate Removal
| Autor: | Ming Biao Luo, Feng Luo, Jian Qiang Li, Yang Yang Xiong, Hui Qiong Wu, Xue Feng Feng |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Aqueous solution Chromate conversion coating Chemistry Scanning electron microscope Inorganic chemistry General Chemistry 02 engineering and technology General Medicine 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Adsorption Chemical engineering X-ray photoelectron spectroscopy Transmission electron microscopy 0210 nano-technology Porosity |
| Zdroj: | Angewandte Chemie. 129:16594-16597 |
| ISSN: | 0044-8249 |
| Popis: | Significant synergic effect from metal-organic framework (MOF) and Fe2SO4, so-called MOF+ technique, is for the first time exploited to remove toxic chromate from aqueous solution. The results show that relative to the pristine MOF samples without detectable chromate removal, MOF+ method enables super-performance, giving a 796 Cr mg/g adsorption capacity. The value is almost eight-fold bigger than the best value established in MOF adsorbents, and presents the highest one among all repored porous adsorbents for such use until now. The adsorption mechanism, unlike an anion-exchange process that dominates the chromate removal in all reported MOF adsorbents, as unveiled by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), is due to the surface enrichment of abundant Fe0.75Cr0.25(OH)3 nanospheres on MOF samples. This study outlines a new guideline for designing MOFs with ultrahigh removal capacity toward chromate. |
| Databáze: | OpenAIRE |
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