A structural unique 1D-MoO3@3D-WO3 nanohybrid for stable and reusable photocatalytic conversion of hexavalent chromium in aqueous medium

A novel hybrid of binary metal oxide (1D-MoO3@3D-WO3) nanocomposite synthesized via a simple hydrothermal followed by greener way of ultrasonic assisted method. The synthesized MoO3@WO3 was properly characterized by sophisticated instrumental techniques like XRD, FT-IR, XPS, SEM, TEM, UV-DRS and EDX...

Full description

Saved in:
Bibliographic Details
Published in:Materials chemistry and physics 2021-07, Vol.267, p.124688, Article 124688
Main Authors: Saravanakumar, K., Balakumar, V., Jones, B. Filip, Muthuraj, V.
Format: Article
Language:English
Subjects:
Aqueous solutions
Chromium
Durability and reproducibility
Electron transfer
Hexavalent chromium
Metal oxides
Molybdenum trioxide
MoO3@WO3 nanocomposite
Nanocomposites
Nanomaterials
Photocatalysis
Photocatalytic reduction
Pollutants
Synthesis
X ray photoelectron spectroscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel hybrid of binary metal oxide (1D-MoO3@3D-WO3) nanocomposite synthesized via a simple hydrothermal followed by greener way of ultrasonic assisted method. The synthesized MoO3@WO3 was properly characterized by sophisticated instrumental techniques like XRD, FT-IR, XPS, SEM, TEM, UV-DRS and EDX with mapping analysis. This hybrid nanocatalyst exhibited an increased photocatalytic efficiency towards reduction of toxic Cr(VI) in aqueous solutions compared to those of pure MoO3 and WO3 under visible illumination. The superior photoreduction performance of MoO3@WO3 was ascribed to the formation of heterojuction with suitable band gap alignments. After 25 min irradiation, we found that 97.6% of toxic Cr(VI) was effectively removed. The reduction percentage and kinetic rate constant were found to be 97.6% and 0.367 min−1, respectively. The various reduction parameters were optimized such as pH, Cr(VI) concentration and catalyst weight percentage. Finally, we suggested the photocatalytic electron transfer mechanism, durability and reproducibility of our MoO3@WO3 nanomaterials. Our results may offer an improved system for reduction of toxic pollutants and other photocatalytic applications. [Display omitted] •A novel 1D-MoO3@3D-WO3 nanocomposite photocatalyst was developed.•1D-MoO3@3D-WO3 nanocomposite shows the suppressed charge recombination.•Cr(VI) was effectively removed by 1D-MoO3@3D-WO3 photocatalyst.•The stable 1D-MoO3@3D-WO3 could achieve good reusability.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2021.124688