Halloysite@polydopamine/ZIF-8 Nanocomposites for Efficient Removal of Heavy Metal Ions
In this study, polymeric nanocomposites of zeolitic imidazolate frameworks (ZIFs) were synthesized by assembly of a biomimetic polymer-polydopamine (PDA)onto halloysite nanotubes (HNTs@PDA), followed by the in situ growth of zeolitic imidazolate framework-8 (ZIF-8) on the surface of HNTs@PDA. The ob...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2023-01-01
|
| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2023/7182712 |
| _version_ | 1797792198223200256 |
|---|---|
| author | Linhong Jiao Huixia Feng Nali Chen |
| author_facet | Linhong Jiao Huixia Feng Nali Chen |
| author_sort | Linhong Jiao |
| collection | DOAJ |
| description | In this study, polymeric nanocomposites of zeolitic imidazolate frameworks (ZIFs) were synthesized by assembly of a biomimetic polymer-polydopamine (PDA)onto halloysite nanotubes (HNTs@PDA), followed by the in situ growth of zeolitic imidazolate framework-8 (ZIF-8) on the surface of HNTs@PDA. The obtained nanocomposites (HNTs@PDA/ZIF-8) prevented agglomeration of ZIFs and increased the number of active sites derived from PDA. The factors influencing heavy metal ions (Pb2+, Cd2+, Cu2+, and Ni2+) adsorption by HNTs@PDA/ZIF-8 were discussed. The Langmuir model was able to well describe the adsorption, and the maximum adsorption capacity of HNTs@PDA/ZIF-8 was calculated to be 285.00 mg/g for Cu2+, 515.00 mg/g for Pb2+, 185 mg/g for Cd2+ and 112.5 mg/g for Ni2+. Thermodynamic parameters confirmed that the adsorption was exothermic and spontaneous. Moreover, HNTs@PDA/ZIF-8 has good regenerability, which is very important in practical applications. The adsorption mechanism study showed that electrostatic attraction, coordination reactions and ion-exchange were the main mechanisms between the adsorbents and heavy metal ions. Hence, HNTs@PDA/ZIF-8 is a promising candidate for removing heavy metal ions from wastewater. |
| first_indexed | 2024-03-13T02:29:44Z |
| format | Article |
| id | doaj.art-ff5b9bbad8a14f6e911a1964cf1d372f |
| institution | Directory Open Access Journal |
| issn | 2090-9071 |
| language | English |
| last_indexed | 2024-03-13T02:29:44Z |
| publishDate | 2023-01-01 |
| publisher | Hindawi Limited |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj.art-ff5b9bbad8a14f6e911a1964cf1d372f2023-06-30T00:00:01ZengHindawi LimitedJournal of Chemistry2090-90712023-01-01202310.1155/2023/7182712Halloysite@polydopamine/ZIF-8 Nanocomposites for Efficient Removal of Heavy Metal IonsLinhong Jiao0Huixia Feng1Nali Chen2School of Petrochemical EngineeringSchool of Petrochemical EngineeringSchool of Petrochemical EngineeringIn this study, polymeric nanocomposites of zeolitic imidazolate frameworks (ZIFs) were synthesized by assembly of a biomimetic polymer-polydopamine (PDA)onto halloysite nanotubes (HNTs@PDA), followed by the in situ growth of zeolitic imidazolate framework-8 (ZIF-8) on the surface of HNTs@PDA. The obtained nanocomposites (HNTs@PDA/ZIF-8) prevented agglomeration of ZIFs and increased the number of active sites derived from PDA. The factors influencing heavy metal ions (Pb2+, Cd2+, Cu2+, and Ni2+) adsorption by HNTs@PDA/ZIF-8 were discussed. The Langmuir model was able to well describe the adsorption, and the maximum adsorption capacity of HNTs@PDA/ZIF-8 was calculated to be 285.00 mg/g for Cu2+, 515.00 mg/g for Pb2+, 185 mg/g for Cd2+ and 112.5 mg/g for Ni2+. Thermodynamic parameters confirmed that the adsorption was exothermic and spontaneous. Moreover, HNTs@PDA/ZIF-8 has good regenerability, which is very important in practical applications. The adsorption mechanism study showed that electrostatic attraction, coordination reactions and ion-exchange were the main mechanisms between the adsorbents and heavy metal ions. Hence, HNTs@PDA/ZIF-8 is a promising candidate for removing heavy metal ions from wastewater.http://dx.doi.org/10.1155/2023/7182712 |
| spellingShingle | Linhong Jiao Huixia Feng Nali Chen Halloysite@polydopamine/ZIF-8 Nanocomposites for Efficient Removal of Heavy Metal Ions Journal of Chemistry |
| title | Halloysite@polydopamine/ZIF-8 Nanocomposites for Efficient Removal of Heavy Metal Ions |
| title_full | Halloysite@polydopamine/ZIF-8 Nanocomposites for Efficient Removal of Heavy Metal Ions |
| title_fullStr | Halloysite@polydopamine/ZIF-8 Nanocomposites for Efficient Removal of Heavy Metal Ions |
| title_full_unstemmed | Halloysite@polydopamine/ZIF-8 Nanocomposites for Efficient Removal of Heavy Metal Ions |
| title_short | Halloysite@polydopamine/ZIF-8 Nanocomposites for Efficient Removal of Heavy Metal Ions |
| title_sort | halloysite polydopamine zif 8 nanocomposites for efficient removal of heavy metal ions |
| url | http://dx.doi.org/10.1155/2023/7182712 |
| work_keys_str_mv | AT linhongjiao halloysitepolydopaminezif8nanocompositesforefficientremovalofheavymetalions AT huixiafeng halloysitepolydopaminezif8nanocompositesforefficientremovalofheavymetalions AT nalichen halloysitepolydopaminezif8nanocompositesforefficientremovalofheavymetalions |