Uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable, recyclable adsorbent
Novel hexagonal nanoplates (NPLs) comprised of mesoporous carbon containing imbedded magnetic Co nanoparticles (CoAl2O4 phase) are prepared through direct carbonization of polydopamine (PDA)-coated CoAl layered double hydroxide (LDH). A uniform PDA coating initially covers the surface of LDH by dopa...
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2018-06-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.9.168 |
| _version_ | 1818495206856589312 |
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| author | Can Zhao Yuexiao Song Tianyu Xiang Wenxiu Qu Shuo Lou Xiaohong Yin Feng Xin |
| author_facet | Can Zhao Yuexiao Song Tianyu Xiang Wenxiu Qu Shuo Lou Xiaohong Yin Feng Xin |
| author_sort | Can Zhao |
| collection | DOAJ |
| description | Novel hexagonal nanoplates (NPLs) comprised of mesoporous carbon containing imbedded magnetic Co nanoparticles (CoAl2O4 phase) are prepared through direct carbonization of polydopamine (PDA)-coated CoAl layered double hydroxide (LDH). A uniform PDA coating initially covers the surface of LDH by dopamine self-polymerization under mild conditions. Well-dispersed Co nanoparticles are formed in the NPLs by the partial reduction of cobalt from Co2+ to Co0 with surface carbon during the heat treatment process. The surface morphology and specific surface area of the as-prepared NPLs can be tailored by adjusting the initial dopamine concentration and carbonization temperature. The mesoporous NPLs exhibit excellent sorption of rhodamine B (RhB) dye and fast magnetic separation in aqueous solution. Over 95% of RhB can be adsorbed within 2 min and the adsorption reaches equilibrium after about 30 min. The maximum adsorption capacity approaches 172.41 mg/g. After regeneration, this adsorbent can be recycled easily by magnetic separation and still possess good adsorption capacity for RhB removal, even after five cycles. |
| first_indexed | 2024-12-10T18:17:25Z |
| format | Article |
| id | doaj.art-813200e77ae54f87aeb43f7134cdecbd |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-12-10T18:17:25Z |
| publishDate | 2018-06-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-813200e77ae54f87aeb43f7134cdecbd2022-12-22T01:38:18ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862018-06-01911770178110.3762/bjnano.9.1682190-4286-9-168Uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable, recyclable adsorbentCan Zhao0Yuexiao Song1Tianyu Xiang2Wenxiu Qu3Shuo Lou4Xiaohong Yin5Feng Xin6School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, ChinaSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, ChinaSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, ChinaSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, ChinaSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, ChinaTianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, ChinaSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, ChinaNovel hexagonal nanoplates (NPLs) comprised of mesoporous carbon containing imbedded magnetic Co nanoparticles (CoAl2O4 phase) are prepared through direct carbonization of polydopamine (PDA)-coated CoAl layered double hydroxide (LDH). A uniform PDA coating initially covers the surface of LDH by dopamine self-polymerization under mild conditions. Well-dispersed Co nanoparticles are formed in the NPLs by the partial reduction of cobalt from Co2+ to Co0 with surface carbon during the heat treatment process. The surface morphology and specific surface area of the as-prepared NPLs can be tailored by adjusting the initial dopamine concentration and carbonization temperature. The mesoporous NPLs exhibit excellent sorption of rhodamine B (RhB) dye and fast magnetic separation in aqueous solution. Over 95% of RhB can be adsorbed within 2 min and the adsorption reaches equilibrium after about 30 min. The maximum adsorption capacity approaches 172.41 mg/g. After regeneration, this adsorbent can be recycled easily by magnetic separation and still possess good adsorption capacity for RhB removal, even after five cycles.https://doi.org/10.3762/bjnano.9.168absorbent regenerationCoAl layered double hydroxideefficient adsorbenthexagonal nanoplatesmagnetic nanoparticlespolydopamine |
| spellingShingle | Can Zhao Yuexiao Song Tianyu Xiang Wenxiu Qu Shuo Lou Xiaohong Yin Feng Xin Uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable, recyclable adsorbent Beilstein Journal of Nanotechnology absorbent regeneration CoAl layered double hydroxide efficient adsorbent hexagonal nanoplates magnetic nanoparticles polydopamine |
| title | Uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable, recyclable adsorbent |
| title_full | Uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable, recyclable adsorbent |
| title_fullStr | Uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable, recyclable adsorbent |
| title_full_unstemmed | Uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable, recyclable adsorbent |
| title_short | Uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable, recyclable adsorbent |
| title_sort | uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable recyclable adsorbent |
| topic | absorbent regeneration CoAl layered double hydroxide efficient adsorbent hexagonal nanoplates magnetic nanoparticles polydopamine |
| url | https://doi.org/10.3762/bjnano.9.168 |
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