Removal of Low-concentration Ammonia from Ambient Air by Aluminophosphates |
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Authors: | LI Chunyang WU Shujie YU Guiyang YANG Xuwei LIU Gang ZHANG Wenxiang |
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Affiliation: | Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, Changchun 130021, P. R. China |
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Abstract: | A series of aluminumphosphate materials was prepared and used as adsorbents for the removal of ammonia at low concentrations. The influence of various preparation parameters, including the pH value of sol, calcination temperature and molar ratio of P/Al, on the structure and surface properties as well as adsorption capacity was investigated. The results showed that large amount of P-OH present on the surface of aluminophosphates was suitable for the removal of ammonia. They were the major source of weak Brönsted acid sites and acted as the main active centers for capturing ammonia. |
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Keywords: | Ammonia adsorption Aluminophosphate Air purification Weak acid Porous material |
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