High efficient and selective removal of Pb(2+) through formation of lead molybdate on α-MoO3 porous nanosheets array.

Author(s) Wu, Y.; Cheng, X.; Zhang, X.; Xu, Y.; Gao, S.; Zhao, H.; Huo, L.
Journal J Colloid Interface Sci
Date Published 2017 Apr 01
Abstract

2D hand-like structured α-MoO3 porous nanosheets were grown in-situ onto a capillary by a simple hydrothermal route, on which titanium dioxide seed layer was sol-dip-coated in advance. The α-MoO3 porous nanosheets array exhibits an exceptional lead ion uptake capacity up to 1450.0mg·g(-1), and can effectively reduce Pb(2+) concentration from 20mg·L(-1) to a low level of smaller than 3μg·L(-1), well below the acceptable limits in drinking water standards (10μg·L(-1)) and can efficiently remove 99.9% lead ion within a few minutes at room temperature. Furthermore, α-MoO3 porous nanosheets array also has high selectivity toward Pb(2+) better than Cu(2+), Zn(2+), Cr(3+) and Cd(2+). The mechanism for adsorption was discussed according to the results of Zeta potential, IR, XPS and XRD analyses. The excellent removal performance of the array to Pb(2+) is resulted from the electrostatic adsorption interaction and the formation of new species lead molybdate.

DOI 10.1016/j.jcis.2016.12.029
ISSN 1095-7103
Citation Wu Y, Cheng X, Zhang X, Xu Y, Gao S, Zhao H, et al. High efficient and selective removal of Pb(2+) through formation of lead molybdate on α-MoO3 porous nanosheets array. J Colloid Interface Sci. 2017;491:80-88.

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