Use of covalent organic framework TpPa(OH)2 as pH-responsive adsorbent for copper ions from water

Jun Bo Liao, Jo Shu Chang, Duu Jong Lee

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

For the first time, this study applied the covalent organic framework TpPa(OH)2 as a pH-responsive adsorbent for copper ions from water. The Langmuir adsorption capacities at pH 7 and 25, 35, and 45 °C are 56.2, 84.8, and 109.9 mg copper ions/g, respectively, an endothermic and entropy-driven process. The adsorption capacity of TpPa(OH)2 on copper ions at pH −0.2 and 35 °C is reduced to 11.3 mg/g, an 86.7% loss. The layered structures of TpPa(OH)2 are deteriorated by proton attacks at pH −0.2. The pH-swing (7, −0.2, then 7) increases the Langmuir capacity at pH 7 by 35.5%, contributed by excess sites of the exfoliated layers. The TpPa(OH)2 can be applied as a pH-responsive adsorbent, adsorbing 109.5 ± 3.2 mg copper ions/g at pH 7 and releasing 82.6% adsorbed copper ions at pH −0.2.

原文English
文章編號134061
期刊Materials Letters
338
DOIs
出版狀態Published - 2023 5月 1

All Science Journal Classification (ASJC) codes

  • 一般材料科學
  • 凝聚態物理學
  • 材料力學
  • 機械工業

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