The increasing severity of water pollution has strongly urged to develop green and efficient adsorbents for waste-water treatment. In this work, ZnAl layered double oxide nanosheets uniformly coated with ultra-thin amorphous carbon shells (ZnAl-LDO@C) were fabricated by modifying ZnAl layered double hydroxides (LDHs) with molecular ligands followed by calcination. Compared with their counterparts derived from the pristine ZnAl-LDH, ZnAl-LDO@C nanosheets exhibit higher specific surface area with abundant and highly accessible active sites. The adsorption performance of the ZnAl-LDO@C nanosheets for methyl orange (MO) and hexavalent chromium [Cr(VI)] ions was investigated in detail. It is found that the channel-like hydrophilic carbon shells facilitate the diffusion of water molecules and ions, leading to the fast adsorption rate. In addition, the rich oxygen-containing functional groups in the amorphous carbon shells can efficiently improve the adsorption capacity through multiple interactions. As a result, ZnAl-LDO@C nanosheets exhibit superior adsorption performance for MO and Cr(VI), outperforming most LDH- or LDO-based adsorbents reported previously. Meanwhile, a new oriented overlapping intercalation mechanism for MO adsorption was proposed for the first time to clarify how MO molecules arrange at the interlayer space.
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http://dx.doi.org/10.1016/j.jhazmat.2020.122766 | DOI Listing |
ACS Appl Bio Mater
December 2024
Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China.
SARS-CoV-2 is a threat to global public health, which requires the development of safe measures to reduce the spread of this coronavirus. Herein, in this study, we prepared and examined potential antiviral agents based on ZnAl-layered double hydroxide (ZnAl-LDH) materials. ZnAl-LDH-based samples were synthesized via a one-pot low-temperature coprecipitation method, which features an ultrathin structure.
View Article and Find Full Text PDFAdv Sci (Weinh)
December 2024
Analytical & Testing Center, Chengdu, 610064, China.
Aqueous-phase phosphors are of utmost importance for a myriad of applications. However, the emission wavelengths of the current aqueous organic room-temperature phosphorescent (RTP) materials are limited to green and red bands, while the blue part is rarely reported, thus limiting the development of a full-color RTP system. Theoretically, carboxylated benzene is expected to be blue phosphorescence-emissive, but only green phosphorescence is observed in solid, due to the strong intermolecular π-π stacking that decreases the energy gap.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2024
School of Science, RMIT University, Melbourne, Victoria 3000, Australia.
J Hazard Mater
November 2024
Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, PR China. Electronic address:
J Sep Sci
November 2024
Department of Analytical Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran.
In this study, in situ electrodeposition of Zn─Al-layered double hydroxides (Zn─Al-LDHs) on the surface of pencil graphite substrate were practiced with interlayer modification by ibuprofen. The prepared composite increases the efficiency of the proposed method by increasing the level of interaction between the sorbent and the selected analytes including acetylsalicylic acid and naproxen (NAP) in real sample. Eventually, the extracted target analytes were injected into high-performance liquid chromatography ultraviolet (HPLC-UV) for their measurement.
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