Synthesis and Characterization of Green Tea Stabilized Iron Nanocatalysts for Brymothymol Blue (BTB) Degradation

Abstract:

Iron nanoparticles (FeNPs) were prepared from the green tea extracts at different temperatures through green synthesis procedure and characterized by various physicochemical techniques like UV-Visible spectroscopy, FTIR Spectroscopy, energy dispersive X-ray spectrometry (EDS), X-ray diffraction and high resolution tunneling microscopy (HRTEM) and the results confirmed the synthesis of polydisperse and stable FeNPs by the tea extracts. The catalytic activity of FeNPs was investigated using a common environmental pollutant BTB often used in textile industries for dyeing purposes. In these tests, catalytic degradation of BTB with FeNPs at a 10 μL or 30 μL concentration was done in the presence of 2% hydrogen peroxide. Results show no BTB degradation in the absence of the FeNPs. However, a 38% and 68% degradation of BTB was realized in the presence of 10μL and 30 μL FeNPs respectively indicating that the iron nanocatalysts were responsible for the dye degradation. The BTB degradation kinetics was found to follow pseudo-first order kinetics with rate constants at the two catalyst concentrations being 0.023 min^-1 and 0.063 min^-1 respectively.

• Periodical: Journal of Nano Research (Volume 42)
• Pages: 1-13
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.42.1
• Online since: July 2016
• Authors: David Mutuku Katithi, Immaculate N. Michira*, Peterson M. Guto, Priscilla Gloria Lorraine Baker, Geoffrey N. Kamau, Emmanuel Iheanyichukwu Iwuoha
• Keywords: Brymothymol Blue, Catalytic Degradation, Environmental Remediation, Green Synthesis, Iron Nanoparticles

References

[1] C. Kethirabalan, A. Gurusany, Antibacterial activity of pH dependent biosynthesized silver nanoparticles against clinical pathogen. Biomedical Research International, (2014), Article ID 725165.

DOI: 10.1155/2014/725165

[2] E.C. Njagi, H. Huang, L. Stafford , H. Genuino , H. M. Galindo , J. B. Collins, G. E. Hoag G, S. L. Suib, Biosynthesis of iron and silver nanoparticles at room temperature using aqueous Sorghum Bran extracts. Langmuir 27 (2011) 264–271.

DOI: 10.1021/la103190n

[3] S. M. Ponder, J. G. Darab, J. Bucher, D. Caulder, I. Craig, L. Davis, N. Edelstein, W. Lukens, H. Nitsche, L. Rao, D. K. Shuh, T. E. Mallouk, Surface chemistry and electrochemistry of supported zerovalent iron nanoparticles in the remediation of aqueous metal contaminants. Chem. Mater 13. (2001).

DOI: 10.1021/cm000288r

[4] R. Yavukkumar, V. Elango, V. Rajendran, N. Kannan, Preparation and characterization of zero valent iron nanoparticles, Digest journal of nanomaterials and biostructures, 6 (2011) (4): 1771-1776.

[5] L. Li, M. Fan , R.C. Brown, J. V. Leeuwen, J. Wang, W. Wang, Y. Song, P. Zhang, Synthesis, properties and environmental applications of nanoscale iron based materials: A review. Critical Reviews in Environmental science and technology 36 (2006).

DOI: 10.1080/10643380600620387

[6] G.K. Pashetti, A. A. Telke, D. C Kalyani, S. P. Govindwar, Decoloration and detoxification of sulfonated azo dye methyl orange by Kocuria rosea MTCC 1532. J. Hazard. Mater. 176 (2010) 503–509.

DOI: 10.1016/j.jhazmat.2009.11.058

[7] Y-P Sun, X-Q Li, J. Cao, W-X Zhang, H. P. Wang, Characterization of Zero-valnet iron nanoparticles. Advances in colloid and Interface science, 120 (2006) 47-56.

DOI: 10.1016/j.cis.2006.03.001

[8] T. B Scott, I.C. Popescu, R.A. Crane, C. Noubactep, Nanoscale metallic iron for the treatment of solutions containing multiple inorganic contaminants. Journal of Hazardous Materials 186(2011) (1) 280-287.

DOI: 10.1016/j.jhazmat.2010.10.113

[9] D. J. Ingle, S.R. Crouch, Spectrochemical Analysis, 1st Ed, Prentice Hall, New Jersey(1988).

[10] L. Guo , Q. Huang, X-Y Li X, S. Yang , Iron nanoparticles: synthesis and application in surface enhanced Raman Scattering and electrocatalysis. Chem. Phy. 3(2001) : 1661-1665.

DOI: 10.1039/b009951l

[11] D. W. Elliott and W-X Zhang, Field assessment on nanoscale bimetallic particles for groundwater treatment. Environmental Sci. Technology 15 (2001) 4922-4926.

DOI: 10.1021/es0108584

[12] G-J Du, Z. Zhang, X-D Wen, C. Yu, Tr. Calway, C-S Yuan, C-Z Wang, Epigallocatechin gallate (EGCG) is the most effective cancer chemopreventive polyphenol in green tea. Nutrients, 4 (2012) 1679-1691.

DOI: 10.3390/nu4111679

[13] E. Palacios., P. Leret , J. F. FernáA, H. De Aza, M. A. Rodríguez, Synthesis of amorphous iron phosphate nanoparticles. Journal of nanoparticle research 14 (2012) 1131): 1-7.

DOI: 10.1007/s11051-012-1131-y

[14] G. Hoag, J. Collins, J. Holcomb, J. Hoag, M .R. Nadagouda Varma, Degradation of bromothylmol blue by greener, nano-scale zero-valent iron synthesized using tea polyphenols. J. Mater. Chem. 19 (2009) 8671–8677.

DOI: 10.1039/b909148c