Issue 93, 2016, Issue in Progress

Lanthanum molybdenum oxide as a new platform for highly selective adsorption and fast separation of organic dyes

Abstract

Exploration of new adsorbents for quick and highly selective adsorption and efficient separation of dyes in waste water is in urgent demand due to environmental problems. Herein, a new lanthanum molybdenum oxide adsorbent, La2Mo2O9, is prepared by the calcination of a new crystalline compound [La(CH3COO)(H2O)]MoO4 (La–Mo). After the precursor (La–Mo) is calcined at 600 °C, the as-prepared La2Mo2O9 (abbr. La–Mo600) exhibits fast and highly selective adsorption for multi-sulfonic dyes. Furthermore, the dyes adsorbed on La–Mo600 can be easily eluted by a dilute alkaline solution. Thus, it can be used as a new type of adsorbent to separate dye mixtures. The La–Mo600 adsorbent possesses excellent stability in the pH range of 1–13 and can be easily re-used seven times with a negligible adsorption decline. This study suggests that the adsorbent, La2Mo2O9, may represent a promising new generation of dye adsorbents that can realize quick adsorption, high selectivity and efficient separation of organic dye mixtures.

Graphical abstract: Lanthanum molybdenum oxide as a new platform for highly selective adsorption and fast separation of organic dyes

Supplementary files

Article information

Article type
Paper
Submitted
01 Jun 2016
Accepted
08 Sep 2016
First published
08 Sep 2016

RSC Adv., 2016,6, 90010-90017

Lanthanum molybdenum oxide as a new platform for highly selective adsorption and fast separation of organic dyes

M. Sun, Y. Ma, H. Tan, J. Yan, H. Zang, H. Shi, Y. Wang and Y. Li, RSC Adv., 2016, 6, 90010 DOI: 10.1039/C6RA14179J

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