skip to main content

Synthesis and Characterization of Pure and Nano-Ag Impregnated Chitosan Beads and Determination of Catalytic Activities of Nano-Ag

1Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, (AJ&K), Pakistan

2Center of Nanotechnology, Department of Material and Metallurgy, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan

Received: 7 Dec 2016; Revised: 19 Dec 2016; Accepted: 21 Dec 2016; Available online: 13 Feb 2017; Published: 30 Apr 2017.
Editor(s): Istadi Istadi
Open Access Copyright (c) 2017 by Authors, Published by BCREC Group under

Citation Format:
Cover Image

The synthesis of nano-Ag impregnated porous Chitosan beads, in crosslinked and uncrosslinked forms, was aimed to investigate their catalytic potential in reducing nitro group into amino by NaBH4. The material was found unique concerning the synthesis of well-defined Ag NPs and subsequently adsorbing them on its surface. The crosslinked and uncrosslinked chitosan beads were separately analyzed for the loading of Ag and its effect over the microstructures of the substrate. BET was used to explore the porous nature and pore size distributions of beads. At each stage, SEM coupled with EDX, FT-IR, and inductively coupled plasma (ICP) were employed to characterize the material. The catalytic activities of nano-Ag in crosslinked and uncrosslinked beads were determined by the reduction of 4-Nitrophenol (4-NP) into 4-aminophenol (4-AP) by NaBH4; which is least effective for such reduction. The catalytic activities were monitored by UV-Vis spectrophotometer. The results demonstrated the nano-Ag as a reliable and active catalyst which made NaBH4 quite capable for the nitro reduction. Moreover, the catalytic activities of crosslinked chitosan substrate were found more reproducible as compared to the uncrosslinked substrate. 

Fulltext View|Download
Keywords: Chitosan beads; Nano-Ag; Nitro reduction; NaBH4

Article Metrics:

  1. Senay, A., Çetinus, H., Nursevin Ö. (2003). Immobilization of Catalase into Chemically Crosslinked Chitosan Beads. Enzyme and Microbial Technology, 32: 889-894
  2. Ming-Shen, C., Pang-Yen, H., Hsing-Ya, L., (2004). Adsorption of Anionic Dyes in Acid Solutions Using Chemically Cross-Linked Chitosan Beads. Dyes and Pigments, 60: 69-84
  3. El-hefian, E.A., Nasef, M.M., Yahaya, A.H. (2011). Chitosan Physical Forms: A Short Review. Australian Journal of Basic and Applied Science, 5: 670-677
  4. Jin, R., Cao, Y.C., Hao, E., Métraux, G.S., Schatz, G.C., Mirkin, C.A. (2003). Controlling Anisotropic Nanoparticle Growth through Plasmon Excitation. Nature, 425: 487-490
  5. Debarre, A., Jaffiol, R., Julien, C., Tchenio, P., Mostafavi, M. (2004). Scattering from Single Ag Aggregates in Presence of EDTA. Chemical Physics Letters, 386: 244-247
  6. Xu, X., Yang, Q., Wang, Y., Yu, H., Chen, X., Jing, X. (2006). Biodegradable Electrospun Poly(L-Lactide) Fibers Containing Antibacterial Silver Nanoparticles. European Polymer Journal, 42: 2081-2087
  7. Liu, I., Sonshine, D.A., Shervani, S., Hurt, R.H. (2010). Controlled Release of Biologically Active Silver from Nanosilver Surfaces. ACS Nano, 4: 6903-6913
  8. Krishna, R.K.S.V., Ramasubba, R.P., Lee, Y.I., Kim, C. (2012). Synthesis and Characterization of Chitosan–PEG–Ag Nano Composites for Antimicrobial Application, Carbohydrate Polymers, 87: 920-925
  9. Tsujino, K., Matsumura, M. (2005). Boring Deep Cylindrical Nanoholes in Silicon Using Silver Nanoparticles as a Catalyst. Advanced Materials, 17: 1045-1047
  10. Shimizu, K., Miyamoto, Y., Satsuma, A. (2010). Silica-Supported Silver Nanoparticles with Surface Oxygen Species as a Reusable Catalyst for Alkylation of Arenes. Chem. Cat. Chem, 2: 84-91
  11. Kunio, E., Ryoko, I., Tomokazu, Y. (2004). Preparation of PAMAM- and PPI-Metal (Silver, Platinum, and Palladium) Nanocomposites and their Catalytic Activities for Reduction of 4-Nitrophenol. Langmuir, 20: 237-243
  12. Subhra, J., Sujit, K.G., Sudip, N., Surojit, P., Snigdhamayee, P., Sudipa, P., Soumen, B., Takeshi, E., Tarasankar, P. (2006). Synthesis of Silver Nanoshell-Coated Cationic Polystyrene Beads: A Solid Phase Catalyst for the Reduction of 4-Nitrophenol. Applied Catalysis A: General, 313: 41-48
  13. Annamalai, L., Thumu, U.B.R., Thalappil, P. (2011). Supported Quantum Clusters of Silver as Enhanced Catalysts for Reduction. Nanoscale Research Letters, 6(123): 1-9. doi: 10.1186/1556-276X-6-123
  14. Dongwei, W., Wuyong S., Weiping, Q., Yongzhong, Y., Xiaoyuan, M. (2009). The Synthesis of Chitosan-Based Silver Nanoparticles and their Antibacterial Activity. Carbohydrate Research, 344: 2375-2382
  15. Dongwei, W., Weiping, Q. (2008). Facile Synthesis of Ag and Au Nanoparticles Utilizing Chitosan as a Mediator Agent. Colloids and Surfaces B: Biointerfaces, 62: 136-142
  16. Al Sagheer, F.A., Al-Sughayer, M.A., Muslim, S., Elsabee, M.Z. (2009). Extraction and Characterization of Chitin and Chitosan from Marine Sources in Arabian Gulf. Carbohydrate Polymers, 77: 410-419
  17. Rudrapatnam, N., Kittur,T., Kittur, F.S. (2002). Chitin - The Undisputed Biomolecule of Great Potential, Critical Reviews in Food Sciences and Nutrition. 43(1): 61-87
  18. Kubota, N. (1997). Permeability Properties of Chitosan-Transition Metal Complex Membranes. Journal of Applied Polymer Science, 64: 819-822
  19. Zahoor, A., Teng, Q., Wang, H., Choudhry, M. A., Li, X. (2011). Synthesis and Characterization of Ag@polycarbazole Coaxial Nanocables and their Enhanced Dispersion Behavior. Metals and Materials International, 17: 417-423
  20. Zahoor, A., Teng, Q., Zhang, J., Li, X. (2009). Synthesis and Characterization of Ag@Polycarbazole Nanoparticles and their Novel Optical Behavior. Journal of Materials Science, 44: 6054-6059
  21. Duan, H., Teng, Q.,H. Guo, H., Ye, J., Yuan, Y., Li, X. (2016). The Aminolysis of Styrene–Maleic Anhydride Copolymers for a New Modifier Used in Urea-Formaldehyde Resins. International Journal of Adhesion and Adhesives, 66: 138-146
  22. Iuliana, S., Teaca, C-A., Ruxanda, B. (2011). Preparation and Characterization of Adipic Acid-Modified Starch Microparticles/Plasticized Starch Composite Films Reinforced by Lignin. Journal of Materials Science, 46: 3241-3251
  23. Govindan, S., Nivethaa, E.A.K., Saravanan, R., Narayanan, V., Stephen, A. (2012). Synthesis and Characterization of Chitosan–Silver Nanocomposite. Applied Nanoscience, 2: 299-303
  24. Jung, O-S., Kim, Y. J., Lee, Y-A., Park, J.K., Chae, H.K. (2000). Smart Molecular Helical Springs as Tunable Receptors. Journal of American Chemical Society, 122: 9921-9925
  25. Susanta, K.M., Sachin, U.S., Radha, V.J., Parasuraman, S. (2002). Regio- and Chemoselective Catalytic Transfer Hydrogenation of Aromatic Nitro and Carbonyl as Well as Reductive Cleavage of Azo Compounds over Novel Mesoporous NiMCM-41 Molecular Sieves. Organic Letters, 4: 4297-4300
  26. Desai, D.G., Swami, S.S., Dabhade, S.K., Ghagare M.G. (2001). Fes-NH4Cl-CH3OH-H2O: An Efficient and Inexpensive System for Reduction of Nitroarenes to Anilines. Synthetic Communications, 31: 1249-1251
  27. Boris, L.T.L., William, C.H., Kaoru, I., Olga F., Alan, W.D. (2013). A Preliminary Assessment of the Interactions Between the Capping Agents of Silver Nanoparticles and Environmental Organics. Colloids and Surfaces A: Physicochem. Eng. Aspects, 435: 22-27
  28. Subhra, J., Sujit, K.G., Sudip, N., Surojit, P., Snigdhamayee, P., Sudipa, P., Soumen, B., Takeshi, E., Tarasankar, P. (2006). Synthesis of Silver Nanoshell-Coated Cationic Polystyrene Beads: A Solid Phase Catalyst for the Reduction Of 4-Nitropheno. Applied Catalysis A: General, 313: 41-48

Last update:

No citation recorded.

Last update:

No citation recorded.