Facile synthesis of IrO 2 nanoclusters and their application as catalysts in the degradation of azo dyes
A robust synthesis of iridium oxide (IrO2)2)_{2}) nanoclusters using methanol
as a reducing agent via the chemical reduction method is reported in this
article. Polyvinylpyrrolidone (PVP) and polyoxyethylene(23) lauryl ether
(POLE) were used as stabilizers. The formation of IrO22_{2}
nanoclusters was confirmed by the appearance of new absorption peak at 230
nm in UV-vis spectra. XRD and TEM were used to determine the degree of
crystallinity and size of nanoclusters, respectively. Further
characterization studies were carried out by FT-IR spectroscopy to
investigate the coordination between IrO22_{2} nanoclusters and stabilizers.
The size of the nanoclusters was found to be a factor of the ratio of
solvent to reductant and precursor to stabilizer. It was found that
PVP-stabilized IrO22_{2} nanoclusters are smaller in size with narrow
distribution in contrast to POLE-stabilized IrO22_{2} nanoclusters. The
catalytic activity of these nanoclusters was examined in the
degradation of some azo dyes, acid orange 10 (AO 10), acid red 14 (AR 14),
and acid red 26 (AR 26), in aqueous medium. PVP-stabilized IrO22_{2}
nanoclusters are catalytically more efficient than POLE-stabilized IrO22_{2}
nanoclusters, which was supported by the calculation of turnover
frequencies. Thus, IrO22_{2} nanoclusters are expected to play an imperative
role in the field of catalysis and environmental remediation.
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- Zhang, H.; Jin, M.; Xiong, Y.; Lim, B.; Xia, Y.
Acc. Chem. Res
.
2013
,
46
, 1783-1794.
- Anjum, M.; Miandad, R.; Waqas, M.; Gehany, F.; Barakat, M. A.
Arab. J. Chem
.
2016
(in press).
- Gupta, V. K.; Agarwal, S.; Saleh, T. A.
J:
Hazard. Mater.
2011
,
185
, 17-23.
- Saleh, T. A.; Gupta, V. K.
Environ. Sci. Pollut. Res.
2012
,
19
, 1224-1228.
- Xia, X.; Figueroa-Cosme, L.; Tao, J.; Peng, H.; Niu, G.; Zhu, Y.; Xia, Y.
J. Am. Chem. Soc
.
2014
,
136
, 10878-10881.
- Kundu, S.; Liang, H.
J. Colloid Interface Sci
.
2011
,
354
, 597-609.
- Kant, R.
Natural Science
2012
,
4
, 22-26.
- Mondall, P.; Baksi, S.; Bos, D.
World Scientific News
2017
,
61
, 98-109.
- Khairy, M.; Zakaria, W.
Egyptian Journal of Petroleum
2014
,
23
, 419-426.
- Saikia, P.; Miah, A. T.; Das, P. P.
J. Chem. Sci.
2017
,
129
, 81-93.
- Goel, A.; Sharma, S.
International Transactions in Applied Science
2009
,
12
, 243-251.
- Malina, D.; Sobczak-Kupiec, A.; Wzorek, Z.; Kowalski Z.
Digest Journal of Nanomaterials and Biostructures
2012
,
7
, 1527-1534.
- Alahmad A.
Int. J. ChemTech Res
.
2014
,
6
, 450-459.
- Goel, A.; Rani, N.
Open Journal of Inorganic Chemistry
2012
,
2
, 67-73.
- Ghasemi, S.; Rahimnejad, S.; Setayesh, S.; Rohani, S.; Gholami, M. R.
J. Hazard. Mater.
2009
,
172
, 1573-1578.
- Goel, A.; Lasyal, R.
Water Sci. Technol
.
2016
,
74
, 2551-2559.
- Goel, A.; Lasyal, R.
Desalin. Water Treat.
2016
,
57
, 17547-17556.
- Goel, A.; Bhatt, R.; Neetu.
International Journal of Research in Chemistry and Environment
2012
,
2
, 210-217.