Phytochemical Preparation, Characterization and Photocatalytic Applications of Ag-TiO₂ Nanocatalyst

Abstract:

Green chemical approach is adopted for the synthesis of silver nanoparticles (Ag NPs). Since the nanoparticles tend to aggregate during the course of the catalytic reaction, they need to be stabilized by employing a suitable template or a support. Hence the prepared nanoparticles were loaded on titania support and used as a photocatalyst. Silver loaded titania (Ag-TiO₂) is characterized by UV-visible spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic absorption spectroscopy (AAS). Prepared composite was also tested for its photocatalytic activity against the degradation of an industrial pollutant Rhodamine B dye. Effect of pH, ratio between the catalyst and the substrate and also the role of free radical generator in the degradation have been tested and summarized in this work.Keywords: Silver nanoparticles, Phytochemical preparation, Green chemical approach, Photocatalysis, Rhodamine B

• Periodical: Advanced Materials Research (Volume 1086)
• Pages: 1-6
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1086.1
• Online since: February 2015
• Authors: P. Yuvasree, K. Nithya, N. Neelakandeswari*, N. Rajasekaran, K. Uthayarani, M. Chitra, S. Sathiesh Kumar
• Keywords: Green Chemical Approach, Photocatalysis, Phytochemical Preparation, Rhodamine B (RhB), Silver Nanoparticle

References

[1] W. Wang, X. Chen, and S. Efrima, Silver Nanoparticles Capped by Long-Chain Unsaturated Carboxylates, J. Phys. Chem. B, vol 103, pp.7238-7246, (1999).

DOI: 10.1021/jp991101q

[2] E. Chen, H. Su , W. Zhang and T. Tan, A novel shape-controlled synthesis of dispersed silver nanoparticles by combined bioaffinity adsorption and TiO2 photocatalysis, Powder Tech., vol. 212, p.166–172, (2011).

DOI: 10.1016/j.powtec.2011.05.008

[3] V. Gopinath, D. MubarakAli, S. Priyadarshini, N. Meera Priyadharsshini, N. Thajuddin and P. Velusamy, Biosynthesis of silver nanoparticles from Tribulus terrestris and its antimicrobial activity: A novel biological approach, Colloids and Surfaces B: Biointerfaces, vol. 96, p.69– 74, (2012).

DOI: 10.1016/j.colsurfb.2012.03.023

[4] N. Vigneshwaran, A. A. Kathe, P. V. Varadarajan, R. P. Nachane, and R. H. Balasubramanya, Silver-Protein (Core-Shell) Nanoparticle Production Using Spent Mushroom Substrate, Langmuir, vol. 23, pp.7113-7117, (2007).

DOI: 10.1021/la063627p

[5] C. F. Li and S.H. Zhong, "Study on application of membrane reactor in direct synthesis DMC from CO2 and CH3OH over Cu-KF/MgSiO catalyst, Catal. Today, vol. 82, pp.83-90 , (2003).

DOI: 10.1016/s0920-5861(03)00205-0

[6] S. A. Bocanegra, A. D. Ballarini, O. A. Scelza and S. R. de Miguel, the influence of the synthesis routes of MgAl2O4 on its properties and behaviour as support of dehydrogenation catalysts, Materials Chem. Phy., vol. 111, pp.534-541, (2008).

DOI: 10.1016/j.matchemphys.2008.05.002

[7] N. Rajalakshmi, N. Lakshmi and K. S. Dhathathreyan, Nano titanium oxide catalyst support for proton exchange membrane fuel cells, Int. J. Hydrogen Energy, vol. 33 pp.7521-7526, (2008).

DOI: 10.1016/j.ijhydene.2008.09.032

[8] E. Y. Kaneko, S. H. Pulcinelli, V. Teixeira da Silva and C. V. Santilli, Sol-Gel synthesis of Titania-Alumina catalyst supports, App. Catal. A: General, Vol. 235, p.71 – 78, (2002).

DOI: 10.1016/s0926-860x(02)00236-3

[9] A. Fujishima, T. N. Rao and D. A. Tryk, Titanium Dioxide photocatalysis, J. Photochem. Photobiol. C: Photochemistry Reviews, Vol. 1, pp.1-21, (2000).

[10] D. A. Tryk, A. Fujishima and K. Honda, Recent topics in photoelectrochemistry: Achievements and future prospects, Electrochim Acta, Vol. 45, pp.2363-2376, (2000).

DOI: 10.1016/s0013-4686(00)00337-6

[11] A. Bankar, B. Joshi, A. Ravi Kumar, S. Zinjarde, Banana peel extract mediated novel route for the synthesis of silver nanoparticles, Colloids and Surfaces A: Physicochem. Eng. Aspects, vol. 368, p.58–63, (2010).

DOI: 10.1016/j.colsurfa.2010.07.024

[12] David D. Evanoff, Jr., George Chumanov, Size-Controlled Synthesis of Nanoparticles. 1. Silver-Only, Aqueous Suspensions via Hydrogen Reduction, J. Phys. Chem. B, vol. 108, pp.13948-13956, (2004).

DOI: 10.1021/jp047565s

[13] N. N. Martınez, G. A. M. Castanon, A. A. Pina, F. M. Gutierrez, J. R. M. Mendoza and F. Ruiz, Characterization of silver nanoparticles synthesized on titanium dioxide fine particles, Nanotechnology, Vol. 19, pp.065711-065719, (2008).

DOI: 10.1088/0957-4484/19/6/065711

[14] A. Di Poala, V. Augugliaro, L. Palmisano, G. Pantaleo, E. Savinov, Heterogenious photocatalytic degradation of Nitrophenols, J. Photochem photobiol A: Chem., Vol. 155, pp.207-214, (2003).

DOI: 10.1016/s1010-6030(02)00390-8