Biocompatible HA@Fe3O4@N‐CDs hybrids for detecting and absorbing lead ion. Issue 7 (12th March 2019)

• Record Type: Journal Article
• Authors: Zhou, Mingchen; Xie, Fei; Li, Guocang; Wang, Qiyang; Tang, Longxiang; Yan, Manqing; Bi, Hong
• Is Part Of: Journal of biomedical materials research. Volume 107:Issue 7(2019)
• Page Start: 1532
• Page End: 1540
• Publication Date: 2019-03-12
• Subjects: hydroxyapatite (HA) -- Fe3O4 particles -- lead ion -- adsorbing -- N‐CDs; Biomedical materials -- Periodicals; 610.28
• DOI: 10.1002/jbm.a.36666
• Languages: English
• ISSNs: 1549-3296

Abstract

Abstract: The trinary hydroxyapatite@Fe3 O4 @N‐doped carbon dots (HA@Fe3 O4 @N‐CDs) hybrids were prepared by one‐pot hydrothermal approach and utilized to detect and remove lead ion from aqueous solution. The structures and morphologies of as‐obtained nanorod‐like HA@Fe3 O4 @N‐CDs hybrids were characterized by X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy measurements. These HA@Fe3 O4 @N‐CDs hybrids possess good magnetism by magnetic hysteresis test and multi‐colored fluorescence by the CLSM measurement. Furthermore, the as‐obtained hybrids display excellent biocompatibility by MTT assay. Importantly, the trinary magnetic HA@Fe3 O4 @N‐CDs hybrids as a green detector and adsorbent of Pb 2+ were investigated. The influence of the different pH, the concentration of heavy metal, and the maximum adsorption capacity on removal efficiency was measured in detail. The maximum Pb 2+ adsorption capacity on HA@Fe3 O4 @N‐CDs hybrids is 450 mg/g. The kinetic mechanism was a pseudo‐second order model, and the isotherm data was fitted well by the Langmuir isotherm and Freundlich model. Hence, the nanorod‐like HA@Fe3 O4 @N‐CDs hybrids could be a multifunctional material with significant potential applications in heavy metal detection and adsorption, bone tissue regeneration, magnetic therapy, and biomedicine. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2019.