Kajian penurunan suhu berprogram dan pembelauan sinar-X terhadap penurunan MoO3 menggunakan kepekatan karbon monoksida berbeza

Translated title of the contribution: Temperature programmed reduction and X-ray diffractometry studies of MoO3 reduction by different concentrations of carbon monoxide

Alinda Samsuri, Tengku Shafazila Tengku Saharuddin, Fairous Salleh, Rizafizah Othaman, Mohamed Wahab Mohamed Hisham, Mohd. Ambar Yarmo

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Reduction of molybdenum trioxide, MoO3 to molybdenum dioxide, MoO2 by using carbon monoxide, CO has been studied by temperature programmed reduction (TPR) and X-ray diffraction spectroscopy (XRD). The influence of carbon monoxide concentration on the reduction of MoO3 have been investigated by comparing the reduction behaviour of MoO3 to MoO2 with 20 vol.% and 40 vol.% of CO concentration. The XRD results show that by using 20% of CO, reduction to MoO2 takes place at 700°C in 60 minutes. However, by using 40% of CO, complete reduction to MoO2 takes place at 700°C in only 30 minutes. Moreover, excess of CO results in the formation of molybdenum carbide, Mo2C. It is suggested that by using CO, complete reduction from MoO3 to MoO2 gives two-steps reduction (MoO3 → Mo4O11 → MoO2) with Mo4O11 as an intermediate product. It can be concluded that the reducing behavior of MoO3 is strongly dependent on the concentration of CO and reaction time.

Original languageMalay
Pages (from-to)382-387
Number of pages6
JournalMalaysian Journal of Analytical Sciences
Volume20
Issue number2
Publication statusPublished - 2016

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Carbon Monoxide
X ray diffraction analysis
Temperature
Spectroscopy
molybdenum trioxide
X ray diffraction
molybdenum dioxide

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Kajian penurunan suhu berprogram dan pembelauan sinar-X terhadap penurunan MoO3 menggunakan kepekatan karbon monoksida berbeza. / Samsuri, Alinda; Saharuddin, Tengku Shafazila Tengku; Salleh, Fairous; Othaman, Rizafizah; Hisham, Mohamed Wahab Mohamed; Yarmo, Mohd. Ambar.

In: Malaysian Journal of Analytical Sciences, Vol. 20, No. 2, 2016, p. 382-387.

Research output: Contribution to journalArticle

Samsuri, Alinda ; Saharuddin, Tengku Shafazila Tengku ; Salleh, Fairous ; Othaman, Rizafizah ; Hisham, Mohamed Wahab Mohamed ; Yarmo, Mohd. Ambar. / Kajian penurunan suhu berprogram dan pembelauan sinar-X terhadap penurunan MoO3 menggunakan kepekatan karbon monoksida berbeza. In: Malaysian Journal of Analytical Sciences. 2016 ; Vol. 20, No. 2. pp. 382-387.
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