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Research Papers

Tuning the Photocatalytic Performance of Tungsten Oxide by Incorporating Cu3V2O8 Nanoparticles for H2 Evolution Under Visible Light Irradiation

[+] Author and Article Information
M. B. Tahir

Department of Physics, Faculty of Science,
University of Gujrat,
Hafiz Hayat Campus,
Gujrat 50700, Pakistan
e-mail: m.bilaltahir@uog.edu.pk

T. Iqbal

Department of Physics, Faculty of Science,
University of Gujrat,
Hafiz Hayat Campus,
Gujrat 50700, Pakistan
e-mail: tahir.awan@uog.edu.pk

I. Zeba

Department of Physics,
Lahore College for Women University,
Lahore, Punjab 54000, Pakistan
e-mail: 16101710-004@uog.edu.pk

A. Hasan

Department of Physics, Faculty of Science,
University of Gujrat,
Hafiz Hayat Campus,
Gujrat 50700, Pakistan
e-mail: 16101710-010@uog.edu.pk

Shabbir Muhammad

Department of Physics, College of Science,
King Khalid University,
P.O. Box 9004, Abha 61413, Saudi Arabia
e-mail: mshabbir@kku.edu.sa

Saifeldin M. Siddeeg

Department of Chemistry, College of Science,
King Khalid University,
P.O. Box 9004, Abha, 61413, Saudi Arabia
e-mail: saif.siddeeg@gmail.com

Khurram Shahzad

Center of Excellence in Environmental Studies,
King Abdulaziz University,
Jeddah 21589, Saudi Arabia
e-mail: shahzadkhu@gmail.com

1Corresponding author.

Manuscript received November 22, 2018; final manuscript received April 3, 2019; published online May 9, 2019. Assoc. Editor: Nianqiang Wu.

J. Electrochem. En. Conv. Stor. 17(1), 011002 (May 09, 2019) (5 pages) Paper No: JEECS-18-1124; doi: 10.1115/1.4043491 History: Received November 22, 2018; Accepted April 06, 2019

The green energy production through water splitting under visible light irradiation has become an emerging challenge in the 21st century. Photocatalysis, being a cost-competitive and efficient technique, has grabbed much more attention for environmental applications, especially for hydrogen evolution. In this article, the hybrid Cu3V2O8-WO3 nanostructures were prepared through the hydrothermal method by using copper acetate, ammonium metavanadate, and Na2WO4 · 2H2O as precursors. The varying contents of Cu3V2O8 in WO3 were 0.2%, 0.5%, 1.0%, 2.0%, and 3.0%. The X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), UV-Vis, and photoluminescence (PL) emission spectroscopy were used to investigate the structural, morphological, surface area, and optical properties of prepared samples. The average crystalline size of the pure WO3 ranges from 10 to 15 nm and 70 to 195 nm for an optimal composite sample. The structural phase of the hybrid WO3-Cu3V2O8 nanoparticles was found to transfer from monoclinic to hexagonal by incorporating the Cu3V2O8 contents. The enhanced photocatalytic performance for hydrogen evolution was observed for 2% Cu3V2O8-WO3 composite sample. The key to this enhancement lies at the heterojunction interface, where charge separation occurs. In addition, the excellent photocatalytic activity was attributed to a higher surface area, efficient charge separation, and extended visible light absorption. This work provides an in-depth understanding of efficient separation of charge carriers and transfer processes and steer charge flow for efficient solar-to-chemical energy applications.

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Figures

Grahic Jump Location
Fig. 1

XRD analysis of prepared samples

Grahic Jump Location
Fig. 2

SEM analysis results of (a) 0.2% Cu3V2O8-WO3, (b) 0.5% Cu3V2O8-WO3, (c) 1.0% Cu3V2O8-WO3, (d) 2.0% Cu3V2O8-WO3, and (e) 3.0% Cu3V2O8-WO3

Grahic Jump Location
Fig. 3

UV-Vis spectra of prepared samples

Grahic Jump Location
Fig. 4

PL emission spectroscopy of prepared samples

Grahic Jump Location
Fig. 5

Brunauer–Emmett–Teller surface area of as-prepared samples

Grahic Jump Location
Fig. 6

Photocatalytic activity (H2 evolution) of as-prepared samples

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