Biosynthesized gold nanoparticles supported on magnetic chitosan matrix as catalyst for reduction of 4-nitrophenol

Norfazreen Saffee, Mustaffa Shamsuddin, Khairil Juhanni Abd Karim


The design and environmentally-safe synthesis of magnetically recoverable solid-supported metal nanoparticles with remarkable stability and catalytic performance have significant industrial importance. In the present study, we have developed an inexpensive bioinspired approach for assembling gold nanoparticles (AuNPs) in magnetic chitosan network under green, mild and scalable condition. AuNPs were well loaded on the surface of the magnetic support due to the presence of hydroxyl (-OH) and amino (-NH2) groups in chitosan molecules that provided the driving force for the complexation reaction with the Au(III) ions. Reduction of the Au(III) to Au(0) was is achieved by using Melicope ptelefolia aqueous leaf extract. The synthesized magnetic chitosan supported biosynthesized Au nanocatalyst was characterized using Fourier Transform Infrared (FT-IR), Carbon, Hydrogen and Nitrogen (CHN), Transmission Electron Microscopy (TEM), X-Ray Diffraction (XRD) and Atomic Absorption Spectroscopy (AAS) analyses. FTIR spectrum of magnetic chitosan showed peaks at 1570 cm-1, which indicate for N-H bending vibration and at 577 cm-1 which designates the Fe-O bond. CHN analytical data further supported the coating of chitosan onto the magnetite. TEM analysis showed an amorphous layer around the magnetite core, proving the coating of chitosan on the magnetite surface and the average particle size of AuNPs calculated was 7.34 ± 2.19 nm. XRD analysis showed six characteristics peaks for magnetite, corresponding to lattice planes (220), (311), (400), (422), (511) and (440) in both the magnetite and magnetic chitosan samples (JCPDS file, PDF No. 65-3107). Meanwhile, XRD analysis of catalyst showed characteristic peaks of AuNPs at 2q (38.21°, 44.38°, 62.2°, 77.32° and 80.76°), which correspond to (111), (200), (220), (311) and (222) lattice planes (JCPDS file, PDF No.04-0784). AAS analysis showed the loading of AuNPs as 5.4%. The rate constant achieved for the reduction of 4-nitrophenol to 4-aminophenol in the presence of hydrazine hydrate using 10 mg of catalyst was 0.0046 s-1. The magnetic chitosan supported AuNPs is effective as catalyst for the reduction of 4-nitrophenol.


Magnetic chitosan, Gold nanoparticles, Biosynthesis, Melicope ptelefolia, 4-nitrophenol

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Khan, I., Saeed, K., Khan, I. (2017). Nanoparticles: Properties, applications and toxicities. Arabian Journal of Chemistry, 05 (11), 1-24.

Taha, A., Shamsuddin, M., Alizadeh, A. (2014). Characteristics study on biosynthesized au nanoparticles supported onto cross-link chitosan beads. Journal of Applied Science, 14(21), 2843-2848.

Gardea-Torresdey, Gomez, J. L. E., Peralta-Videa, J. R., Parsons, J. G., Troiani, H., Jose-Yacaman, M. (2003). Alfalfa sprouts: A natural source for the synthesis of silver nanoparticles. Langmuir, 19, 1357-1361.

Ab. Karim, M. S., Nasouddin, S. S., Othman, M., Mohd Adzahan, N., Hussin, S. R., Khozirah, S. (2011). Consumers’ knowledge and perception towards Melicope ptelefolia (Daun Tenggek Burung): A preliminary qualitative study. International Food Research Journal, 18(4):1481.

Makarov, V. V., Love, A. J., Sinitsyna, O. V., Makarova, S. S., Yaminsky, I. V., Taliansky, M. E., Kalinina, N. O. (2013). “Green” Nanotechnologies: Synthesis of metal nanoparticles using plants. Acta Naturae, 6(20), 35-44

Koperuncholan, M. (2015). Bioreduction of chloroauric acid (HAuCl4) for the synthesis of gold nanoparticles (GNPs): A special empathies of pharmacological activity. International Journal of Phytopharmacy, 5 (4), 72-80

Ahmad, M., Ahmed, S., Swami, B. L., Ikram, S. (2015). Adsorption of heavy metal ions: Role of chitosan and cellulose for water treatment. International Journal of Pharmacognosy, 2(6), 280-289.

Parandhaman, T., Pentela, N., Ramalingam, B., Samanta, D., Das, S. K. (2017). Metal nanoparticle loaded magnetic-chitosan microsphere: water dispersible and easily separable hybrid metal nano-biomaterial for catalytic applications. ACS Sustainable Chemistry & Engineering, 5(1), 489-501.

Mehmood, S., Janjua, N. K., Saira, F., Fenniri, H. (2016). AuCl @ Pt nanoalloys for catalytic application reduction of 4-nitrophenol. Journal of Spectroscopy, 6210794, 1-8.

Osuna, Y., Gregorio-Jauregui, K. M., Gaona-Lozano, J. G., Ilyna, A., Barriga-Castro, E. D., Saade, H., Lopez, R. G. (2012). Chitosan-coated magnetic nanoparticles with low chitosan content prepared in one-step. Journal of Nanomaterials, 327562.

Yang, D. J., Hu, S., Fu. (2009). Controlled synthesis of magnetite−silica nanocomposites via a seeded sol−gel approach. The Journal of Physical Chemistry, 113(18), 7646–7651.

Safari, J., Javadian, L. (2014). Chitosan decorated Fe3O4 nanoparticles as a magnetic catalyst in the synthesis of Phenytoin derivatives. RSC Advances, 4, 48973-48979.

Borhamdin, S., Shamsuddin, M., Alizadeh, A. (2016). Biostabilised icosahedral gold nanoparticles: Synthesis, cyclic voltammetric studies and catalytic activity towards 4-nitrophenol reduction. Journal of Experimental Nanoscience, 11(7), 518-530.

Abas, F., Shaari, K., Israf, D., A., Syafri, S., Zainal, Z., Lajis, N. H. (2010). LC–DAD–ESI-MS analysis of nitric oxide inhibitory fractions of tenggek burung (Melicope ptelefolia Champ. ex Benth.). Journal of Food Composition and Analysis, 23, 107-112.

Liu, X., L., Yang, X., Xin, H., Y., Tang, X., P., Weng, L., J., Han, Y., Y., Geng, D. (2016). Ecofriendly Fabrication of Au/Fe3O4-Chitosan Composites for Catalytic Reduction of Methyl Orange. Digest Journal of Nanomaterials and Biostructures, 11, 337-348.

Lu, X., Song, Y., Zhu, A., Wu, F., Song, Y. (2012). Synthesis of gold nanoparticles using cefopernazone as a stabilizing reagent and its application. International Journal of Electrochemical Science, 7, 11236-11245.

Sapkota, K., Han, S. S. (2017). A novel environmentally sustainable synthesis Of Au–Ag@Agcl nanocomposites and their application as an efficient and recyclable catalyst for quinoline synthesis. New Journal of. Chemistry, 41, 5395-5402.

Zayed, M. F., Eisa W. H. (2014). Phoenix dactylifera L. leaf extract phytosynthesized gold nanoparticles; controlled synthesis and catalytic activity. Spectrochim Acta A



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