Tailoring the current density to enhance photocatalytic activity of CuO/HY for decolorization of malachite green

A. A. Jalil, M. A H Satar, S. Triwahyono, H. D. Setiabudi, Kamarudin Nur Hidayatul Nazirah, N. F. Jaafar, N. Sapawe, R. Ahamad

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

CuO supported on HY zeolite (CuO/HY) catalyst was prepared via a simple electrolysis method under different levels of current density, and its properties and photoactive performance were investigated. The physicochemical properties of the catalyst were examined using X-ray Diffraction (XRD), surface area analysis, Ultraviolet-Visible Diffuse Reflectance Spectroscopy (UV-Vis DRS), Fourier Transform Infrared (FTIR) spectroscopy, and pyridine adsorption FTIR. The analyses indicated that CuO/HY catalyst contains both CuO nanoparticles and incorporation of copper into the HY framework. In parallel with the formation of Cu0 in the electrolysis system, the Cu 2+ ions also underwent isomorphous substitution subsequent to dealumination to form a Si-Cu-O bond, as confirmed by the FTIR result. The formation of the Si-Cu-O bond was found to decrease at elevated current density and this lowered the photocatalytic decolorization of malachite green (MG) by CuO/HY. The CuO/HY prepared at 10 mA cm-2 was the optimum catalyst and produced complete and 50% decolorization of 10 and 15 mg L-1 of MG, respectively. The results indicating the decrease in chemical oxygen demand (COD) and total organic carbon (TOC) demonstrated the degradability of MG molecules. The CuO/HY is also stable and showed no leaching effect even after six reaction cycles, with just small decreases in the decolorization percentage (

Original languageEnglish
Pages (from-to)50-58
Number of pages9
JournalJournal of Electroanalytical Chemistry
Volume701
DOIs
Publication statusPublished - 2013
Externally publishedYes

Fingerprint

Current density
Catalysts
Electrolysis
Fourier transforms
Infrared radiation
Zeolites
Chemical oxygen demand
Organic carbon
Pyridine
Leaching
Fourier transform infrared spectroscopy
Copper
Substitution reactions
Spectroscopy
Ions
Nanoparticles
Adsorption
X ray diffraction
Molecules
malachite green

Keywords

  • CuO/HY catalyst
  • Current density
  • Isomorphous substitution
  • Malachite green
  • Photodecolorization

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Tailoring the current density to enhance photocatalytic activity of CuO/HY for decolorization of malachite green. / Jalil, A. A.; Satar, M. A H; Triwahyono, S.; Setiabudi, H. D.; Nur Hidayatul Nazirah, Kamarudin; Jaafar, N. F.; Sapawe, N.; Ahamad, R.

In: Journal of Electroanalytical Chemistry, Vol. 701, 2013, p. 50-58.

Research output: Contribution to journalArticle

Jalil, A. A. ; Satar, M. A H ; Triwahyono, S. ; Setiabudi, H. D. ; Nur Hidayatul Nazirah, Kamarudin ; Jaafar, N. F. ; Sapawe, N. ; Ahamad, R. / Tailoring the current density to enhance photocatalytic activity of CuO/HY for decolorization of malachite green. In: Journal of Electroanalytical Chemistry. 2013 ; Vol. 701. pp. 50-58.
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AU - Satar, M. A H

AU - Triwahyono, S.

AU - Setiabudi, H. D.

AU - Nur Hidayatul Nazirah, Kamarudin

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AB - CuO supported on HY zeolite (CuO/HY) catalyst was prepared via a simple electrolysis method under different levels of current density, and its properties and photoactive performance were investigated. The physicochemical properties of the catalyst were examined using X-ray Diffraction (XRD), surface area analysis, Ultraviolet-Visible Diffuse Reflectance Spectroscopy (UV-Vis DRS), Fourier Transform Infrared (FTIR) spectroscopy, and pyridine adsorption FTIR. The analyses indicated that CuO/HY catalyst contains both CuO nanoparticles and incorporation of copper into the HY framework. In parallel with the formation of Cu0 in the electrolysis system, the Cu 2+ ions also underwent isomorphous substitution subsequent to dealumination to form a Si-Cu-O bond, as confirmed by the FTIR result. The formation of the Si-Cu-O bond was found to decrease at elevated current density and this lowered the photocatalytic decolorization of malachite green (MG) by CuO/HY. The CuO/HY prepared at 10 mA cm-2 was the optimum catalyst and produced complete and 50% decolorization of 10 and 15 mg L-1 of MG, respectively. The results indicating the decrease in chemical oxygen demand (COD) and total organic carbon (TOC) demonstrated the degradability of MG molecules. The CuO/HY is also stable and showed no leaching effect even after six reaction cycles, with just small decreases in the decolorization percentage (

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