Controlled fabrication of α-GaOOH and α-Ga 2O 3 self-assembly and its superior photocatalytic activity

Manickavachagam Muruganandham, Ramakrishnan Amutha, Mahmoud S M Abdel Wahed, Bashir Ahmmad, Yasushige Kuroda, Rominder P S Suri, Jerry J. Wu, Mika E T Sillanpää

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

In this article, we report the fabrication of gallium oxide (α-Ga 2O 3) microspheres (GOMs) by a self-assembly process. Gallium nitrate with oxalic acid in a hydrothermal process results in α-GaOOH, which was further converted into gallium oxide by calcinations at 450 °C for 3 h. We first report the formation of various morphological α-GaOOH by using the above-mentioned methodology. The influence of hydrothermal temperature and time on the crystal structure and its morphology was studied, and the results indicated that hydrothermal temperature played an important role in the final morphology of α-GaOOH. The flower-like α-GaOOH formed at 175 °C is converted into rodlike α-Ga 2O 3 after calcination at 450 °C, and the α-GaOOH microsphere and microrod formed at 200 and 225 °C retained their morphology during the calcination process, respectively. The synthesized α-GaOOH and α-Ga 2O 3 were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), and nitrogen adsorption analysis. The XRD patterns indicated that well-crystallized α-GaOOH and α-Ga 2O 3 were formed in a hydrothermal and calcination process, respectively. The FE-SEM images indicated the formation of well-organized microspheres and microflowers, which were composed of nanoparticles and nanoplates, respectively. The photocatalytic degradation of Acid Orange 7 (AO7) dye and Cr(VI) reduction by using the synthesized GOM under UV light irradiation was investigated. The photocatalytic experiment showed superior photocatalytic activity of GOM having a higher efficiency than TiO 2. We propose a plausible mechanism for the formation of various morphologies of α-GaOOH and α-Ga 2O 3.

Original languageEnglish
Pages (from-to)44-53
Number of pages10
JournalJournal of Physical Chemistry C
Volume116
Issue number1
DOIs
Publication statusPublished - Jan 12 2012

Fingerprint

Microspheres
roasting
Self assembly
self assembly
Calcination
Fabrication
gallium oxides
Gallium
fabrication
field emission
gallium nitrate
Field emission
scanning electron microscopy
oxalic acid
Oxalic Acid
X ray diffraction
Scanning electron microscopy
Oxides
Oxalic acid
gallium

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Muruganandham, M., Amutha, R., Wahed, M. S. M. A., Ahmmad, B., Kuroda, Y., Suri, R. P. S., ... Sillanpää, M. E. T. (2012). Controlled fabrication of α-GaOOH and α-Ga 2O 3 self-assembly and its superior photocatalytic activity. Journal of Physical Chemistry C, 116(1), 44-53. https://doi.org/10.1021/jp205348p

Controlled fabrication of α-GaOOH and α-Ga 2O 3 self-assembly and its superior photocatalytic activity. / Muruganandham, Manickavachagam; Amutha, Ramakrishnan; Wahed, Mahmoud S M Abdel; Ahmmad, Bashir; Kuroda, Yasushige; Suri, Rominder P S; Wu, Jerry J.; Sillanpää, Mika E T.

In: Journal of Physical Chemistry C, Vol. 116, No. 1, 12.01.2012, p. 44-53.

Research output: Contribution to journalArticle

Muruganandham, M, Amutha, R, Wahed, MSMA, Ahmmad, B, Kuroda, Y, Suri, RPS, Wu, JJ & Sillanpää, MET 2012, 'Controlled fabrication of α-GaOOH and α-Ga 2O 3 self-assembly and its superior photocatalytic activity', Journal of Physical Chemistry C, vol. 116, no. 1, pp. 44-53. https://doi.org/10.1021/jp205348p
Muruganandham, Manickavachagam ; Amutha, Ramakrishnan ; Wahed, Mahmoud S M Abdel ; Ahmmad, Bashir ; Kuroda, Yasushige ; Suri, Rominder P S ; Wu, Jerry J. ; Sillanpää, Mika E T. / Controlled fabrication of α-GaOOH and α-Ga 2O 3 self-assembly and its superior photocatalytic activity. In: Journal of Physical Chemistry C. 2012 ; Vol. 116, No. 1. pp. 44-53.
@article{034be90fa9a444949ccbd31c3924dcd0,
title = "Controlled fabrication of α-GaOOH and α-Ga 2O 3 self-assembly and its superior photocatalytic activity",
abstract = "In this article, we report the fabrication of gallium oxide (α-Ga 2O 3) microspheres (GOMs) by a self-assembly process. Gallium nitrate with oxalic acid in a hydrothermal process results in α-GaOOH, which was further converted into gallium oxide by calcinations at 450 °C for 3 h. We first report the formation of various morphological α-GaOOH by using the above-mentioned methodology. The influence of hydrothermal temperature and time on the crystal structure and its morphology was studied, and the results indicated that hydrothermal temperature played an important role in the final morphology of α-GaOOH. The flower-like α-GaOOH formed at 175 °C is converted into rodlike α-Ga 2O 3 after calcination at 450 °C, and the α-GaOOH microsphere and microrod formed at 200 and 225 °C retained their morphology during the calcination process, respectively. The synthesized α-GaOOH and α-Ga 2O 3 were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), and nitrogen adsorption analysis. The XRD patterns indicated that well-crystallized α-GaOOH and α-Ga 2O 3 were formed in a hydrothermal and calcination process, respectively. The FE-SEM images indicated the formation of well-organized microspheres and microflowers, which were composed of nanoparticles and nanoplates, respectively. The photocatalytic degradation of Acid Orange 7 (AO7) dye and Cr(VI) reduction by using the synthesized GOM under UV light irradiation was investigated. The photocatalytic experiment showed superior photocatalytic activity of GOM having a higher efficiency than TiO 2. We propose a plausible mechanism for the formation of various morphologies of α-GaOOH and α-Ga 2O 3.",
author = "Manickavachagam Muruganandham and Ramakrishnan Amutha and Wahed, {Mahmoud S M Abdel} and Bashir Ahmmad and Yasushige Kuroda and Suri, {Rominder P S} and Wu, {Jerry J.} and Sillanp{\"a}{\"a}, {Mika E T}",
year = "2012",
month = "1",
day = "12",
doi = "10.1021/jp205348p",
language = "English",
volume = "116",
pages = "44--53",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "1",

}

TY - JOUR

T1 - Controlled fabrication of α-GaOOH and α-Ga 2O 3 self-assembly and its superior photocatalytic activity

AU - Muruganandham, Manickavachagam

AU - Amutha, Ramakrishnan

AU - Wahed, Mahmoud S M Abdel

AU - Ahmmad, Bashir

AU - Kuroda, Yasushige

AU - Suri, Rominder P S

AU - Wu, Jerry J.

AU - Sillanpää, Mika E T

PY - 2012/1/12

Y1 - 2012/1/12

N2 - In this article, we report the fabrication of gallium oxide (α-Ga 2O 3) microspheres (GOMs) by a self-assembly process. Gallium nitrate with oxalic acid in a hydrothermal process results in α-GaOOH, which was further converted into gallium oxide by calcinations at 450 °C for 3 h. We first report the formation of various morphological α-GaOOH by using the above-mentioned methodology. The influence of hydrothermal temperature and time on the crystal structure and its morphology was studied, and the results indicated that hydrothermal temperature played an important role in the final morphology of α-GaOOH. The flower-like α-GaOOH formed at 175 °C is converted into rodlike α-Ga 2O 3 after calcination at 450 °C, and the α-GaOOH microsphere and microrod formed at 200 and 225 °C retained their morphology during the calcination process, respectively. The synthesized α-GaOOH and α-Ga 2O 3 were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), and nitrogen adsorption analysis. The XRD patterns indicated that well-crystallized α-GaOOH and α-Ga 2O 3 were formed in a hydrothermal and calcination process, respectively. The FE-SEM images indicated the formation of well-organized microspheres and microflowers, which were composed of nanoparticles and nanoplates, respectively. The photocatalytic degradation of Acid Orange 7 (AO7) dye and Cr(VI) reduction by using the synthesized GOM under UV light irradiation was investigated. The photocatalytic experiment showed superior photocatalytic activity of GOM having a higher efficiency than TiO 2. We propose a plausible mechanism for the formation of various morphologies of α-GaOOH and α-Ga 2O 3.

AB - In this article, we report the fabrication of gallium oxide (α-Ga 2O 3) microspheres (GOMs) by a self-assembly process. Gallium nitrate with oxalic acid in a hydrothermal process results in α-GaOOH, which was further converted into gallium oxide by calcinations at 450 °C for 3 h. We first report the formation of various morphological α-GaOOH by using the above-mentioned methodology. The influence of hydrothermal temperature and time on the crystal structure and its morphology was studied, and the results indicated that hydrothermal temperature played an important role in the final morphology of α-GaOOH. The flower-like α-GaOOH formed at 175 °C is converted into rodlike α-Ga 2O 3 after calcination at 450 °C, and the α-GaOOH microsphere and microrod formed at 200 and 225 °C retained their morphology during the calcination process, respectively. The synthesized α-GaOOH and α-Ga 2O 3 were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), and nitrogen adsorption analysis. The XRD patterns indicated that well-crystallized α-GaOOH and α-Ga 2O 3 were formed in a hydrothermal and calcination process, respectively. The FE-SEM images indicated the formation of well-organized microspheres and microflowers, which were composed of nanoparticles and nanoplates, respectively. The photocatalytic degradation of Acid Orange 7 (AO7) dye and Cr(VI) reduction by using the synthesized GOM under UV light irradiation was investigated. The photocatalytic experiment showed superior photocatalytic activity of GOM having a higher efficiency than TiO 2. We propose a plausible mechanism for the formation of various morphologies of α-GaOOH and α-Ga 2O 3.

UR - http://www.scopus.com/inward/record.url?scp=84862908907&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862908907&partnerID=8YFLogxK

U2 - 10.1021/jp205348p

DO - 10.1021/jp205348p

M3 - Article

AN - SCOPUS:84862908907

VL - 116

SP - 44

EP - 53

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 1

ER -