Two-Dimensional Titanium Carbides (Ti 3 C 2 T x ) Functionalized by Poly(m-phenylenediamine) for Efficient Adsorption and Reduction of Hexavalent Chromium

Linfeng Jin, Liyuan Chai, Weichun Yang, Haiying Wang and Liyuan Zhang
Additional contact information
Linfeng Jin: School of Metallurgy and Environment, Central South University, Changsha 410083, China
Liyuan Chai: School of Metallurgy and Environment, Central South University, Changsha 410083, China
Weichun Yang: School of Metallurgy and Environment, Central South University, Changsha 410083, China
Haiying Wang: School of Metallurgy and Environment, Central South University, Changsha 410083, China
Liyuan Zhang: Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, 14476 Potsdam, Germany

IJERPH, 2019, vol. 17, issue 1, 1-13

Abstract: Titanium carbides (MXenes) are promising multifunctional materials. However, the negative surface charge and layer-by-layer restacking of MXenes severely restrict their application in the field of anionic pollutants, including in hexavalent chromium (Cr(VI)). Herein, Ti 3 C 2 T x MXenes was functionalized through in situ polymerization and intercalation of poly(m-phenylenediamine) (PmPD), then Ti 3 C 2 T x /PmPD composites were obtained. Delightedly, Ti 3 C 2 T x /PmPD composites exhibited positive surface charge, expanded interlayer spacing, and enhanced hydrophobicity. Furthermore, the specific surface area of Ti 3 C 2 T x /PmPD composite was five and 23 times that of Ti 3 C 2 T x and PmPD, respectively. These advantages endowed Ti 3 C 2 T x /PmPD composite with an excellent adsorption capacity of Cr(VI) (540.47 mg g −1 ), which was superior to PmPD (384.73 mg g −1 ), Ti 3 C 2 T x MXene (137.45 mg g −1 ), and the reported MXene-based adsorbents. The Cr(VI) removal mechanism mainly involved electrostatic adsorption, reduction, and chelation interaction. This study developed a simple functionalization strategy, which would greatly explore the potential of MXenes in the field of anionic pollutants.

Keywords: titanium carbides; functionalization; polymerization; hexavalent chromium; adsorption (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1660-4601/17/1/167/pdf (application/pdf)
https://www.mdpi.com/1660-4601/17/1/167/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:17:y:2019:i:1:p:167-:d:301899

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().