Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2019 Dec 18;25(1):2.
doi: 10.3390/molecules25010002.

The Combination of MoS2/WO3 and Its Adsorption Properties of Methylene Blue at Low Temperatures

Yifan Zheng  1   2 , Jingjing Wang  1 , Yedan Wang  1 , Huan Zhou  1   2 , Zhiying Pu  1   2 , Qian Yang  1   2 , Wanzhen Huang  1   2
Affiliations

The Combination of MoS2/WO3 and Its Adsorption Properties of Methylene Blue at Low Temperatures

Yifan Zheng et al. Molecules. .

Abstract

It was found previously that neither monomer MoS2 nor WO3 is an ideal material for the adsorption of organic dyes, while MoS2/WO3 composites synthesized by a two-step hydrothermal method have outstanding adsorption effects. In this work, the chemical state of each element was found to be changed after combination by X-ray photoelectron spectroscopy analysis, which lead to their differences in adsorption performance. Moreover, the adsorption test of methylene blue on MoS2/WO3 composites was carried out under a series of temperatures, showing that the prepared composites also had appreciable adsorption rates at lower temperatures. The adsorption process could be well described by the Freundlich isothermal model and the pseudo-second order model. In addition, the particle-internal diffusion model simulation revealed that the internal diffusion of the particles played an important role in the whole adsorption process.

Keywords: MoS2/WO3; adsorption; combination; methylene blue.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
X-ray diffraction (XRD) patterns of WO3 (a), MoS2 (b), and MoS2/WO3 (c).
Figure 2
Figure 2
Scanning electron microscopy (SEM) images of WO3 (a), MoS2 (b), and MoS2/WO3 (c).
Figure 3
Figure 3
Element mapping of MoS2/WO3.
Figure 4
Figure 4
X-ray photoelectron spectroscopy (XPS) spectra of Mo 3d, S 2p, O 1s, and W 4f in the as-prepared MoS2, WO3, and MoS2/WO3.
Figure 5
Figure 5
Relationship between adsorption capacity and time at different temperatures.
Figure 6
Figure 6
Effect of reaction temperature on the degradation rate of methylene blue (MB).
Figure 7
Figure 7
(a) pesudo-first order, (b) pesudo-second order, and (c) intra-particle diffusion model plots for adsorption data of MB onto MoS2/WO3 at different temperatures.
Figure 8
Figure 8
Fitting of equilibrium data to various adsorption isotherms.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

References

    1. Ravikumar K., Deebika B., Balu K. Decolourization of aqueous dye solutions by a novel adsorbent: Application of statistical designs and surface plots for the optimization and regression analysis. J. Hazard. Mater. 2005;1:75–83. doi: 10.1016/j.jhazmat.2005.03.008. - DOI - PubMed
    1. Robinson T., Mcmullan G., Marchant R., Nigam p. Remediation of dyes in textile effluent: A critical review on current treatment technologies with a proposed alternative. Bioresour. Technol. 2001;3:247–255. doi: 10.1016/S0960-8524(00)00080-8. - DOI - PubMed
    1. Ritika, Manjot K., Ahmad U., Surinder K., Surinder S., Sushil K., Fouad H., Othman Y. Rapid Solar-Light Driven Superior Photocatalytic Degradation of Methylene Blue Using MoS2-ZnO Heterostructure Nanorods Photocatalyst. Mater. 2018;11:2254. doi: 10.3390/ma11112254. - DOI - PMC - PubMed
    1. Xiao X., Sun Y., Sun W., Shen H., Zheng H., Xu Y., Zhao J., Wu H., Liu C. Advanced treatment of actual textile dye wastewater by Fenton-flocculation process. Can. J. Chem. Eng. 2017;7:1245–1252. doi: 10.1002/cjce.22752. - DOI
    1. Malik P.K., Saha S.K. Oxidation of direct dyes with hydrogen peroxide using ferrous ion as catalyst. Sep. Purif. Technol. 2003;3:241–250. doi: 10.1016/S1383-5866(02)00200-9. - DOI

LinkOut - more resources