Specific separation and recovery of phosphate anions by a novel NiFe-LDH/rGO hybrid film based on electroactivity-variable valence
| Autor: | Pengfei Ma, Jiangwei Zhu, Xiao Du, Yanyan Yang, Xiaoqiong Hao, Xiaowei An, Xiaogang Hao, Claudia Prestigiacomo |
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| Přispěvatelé: | Ma Pengfei, Zhu Jiangwei, Du Xiao, Yang Yanyan, Hao Xiaoqiong, An Xiaowei, Hao Xiaogang, Prestigiacomo Claudia |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Adsorption capacity
Phosphorus Inner-sphere complexation Settore ING-IND/27 - Chimica Industriale E Tecnologica Phosphates Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Colloid and Surface Chemistry Valence state transition Selective extraction Metals Layered double hydroxide Hydroxides Graphite Phosphate anion |
| Popis: | Phosphorus is a non-renewable resource. Supplies are limited and much phosphorus is currently wasted during the production and utilization process, causing concerns about future supplies and widespread environmental problems. To solve these problems, a new type of NiFe-LDH/rGO electrically switched ion-selective (ESIX) film is designed, based on the dominant mechanism of inner-sphere complexation. An ESIX process allows the NiFe-LDH/rGO hybrid film to achieve a controllably selective uptake and release of the phosphate anions. This route involves tuning potential steps to regulate the redox states of the composite film and the variable metal (e.g., Ni, Fe (II)/(III)) in coordination centers, as the inner- sphere complexation of the metals to phosphate anions is combined with the assistance of the outer elec- tric field. A high absorption capacity (270 mg g 1) and regeneration rate (>85%) were achieved, together with good cycle stability. |
| Databáze: | OpenAIRE |
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