Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Nonprecious bimetallic (Mo, Fe)-N/C nanostructures loaded on PVDF membrane for toxic Cr(VI) reduction from water
Author: Yao, Y.
Gao, M.
Zhang, Y.
Zheng, H.
Hu, H.
Yin, H.
Wang, S.
Citation: Journal of Hazardous Materials, 2020; 389:121844-1-121844-11
Publisher: Elsevier
Issue Date: 2020
ISSN: 0304-3894
Statement of
Yunjin Yao, Mengxue Gao, Yangyang Zhang, Hongda Zheng, Huanhuan Hu, Hongyu Yin, Shaobin Wang
Abstract: Nonprecious bimetallic molybdenum and iron embedded into N-doped carbon (MoFe-NC) hybrids were designed and fabricated by pyrolysis of mixed precursors and then immobilized on poly (vinylidene fluoride) (PVDF) films via a phase inversion process to obtain novel catalytic membranes (MoFe-NC@PVDF) for toxic Cr(VI) reduction. The catalytic membranes are highly active for aqueous Cr(VI) reduction using formic acid (FA) as a sacrificial electron donor under mild conditions. The results demonstrated that the parameters of synthesis process can efficiently adjust the morphology and textural properties of the as-synthesized MoFe-NC@PVDF membrane, and thus have a significant impact on the catalytic behavior. Cr(VI) reduction rates significantly increased with increasing FA concentrations (0.234-0.936 M) and reaction temperature (5-35℃), but declined with the increase of Cr(V) concentrations (5-40 mg/L) and pH values of solution (1.87-4.62). Mo-Nₓ, Fe-Nₓ, and C-Nₓ are the active sites, boosting the dissociation of FA molecules into active H* species for effective catalytic reduction of Cr(VI). The catalytic PVDF membrane exhibited distinct porous structure and numerous interaction sites, which not only stabilized metallic nanoparticles, but also promoted mass transfer across the membrane. This cost-effective catalytic membrane provides a new approach toward the treatment of Cr(VI)-containing water.
Keywords: Hexavalent chromium; catalytic membrane; formic acid; reduction reaction; bimetallic catalyst
Rights: © 2019 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.jhazmat.2019.121844
Grant ID:
Published version:
Appears in Collections:Aurora harvest 8
Chemical Engineering publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.