Eco-friendly synthesis of gold nanoparticles using carboxymethylated gum Cochlospermum gossypium (CMGK) and their catalytic and antibacterial applications
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Gold nanoparticles (AuNPs) were synthesized by the green method with activated Cochlospermum gossypium (carboxymethylated Cochlospermum gossypium gum or carboxymethylated gum kondagogu: CMGK) as stabilizer and reducing agent. The obtained size of AuNPs was 11 ± 2 nm. The impacts of HAuCl4 concentration, CMGK concentration, and reaction time on the synthesis of AuNPs were investigated. The techniques, UV − visible spectroscopy, FTIR, DLS, TEM, and powder XRD, were used for characterization. The reducing capacity of the synthesized CMGK-AuNPs was tested for reduction of 4-nitrophenol (4-NP) along with NaBH4. The effects of NaBH4, catalyst dose, and temperature were studied for reduction of 4-NP. The AuNPs showed good antibacterial activity against E. coli and Bacillus subtilis. The outcomes of the study indicated that CMGK–AuNPs have notable antimicrobial and environmental applications.
KeywordsGold nanoparticles Carboxymethylated kondagogu gum Antibacterial activity Catalytic activity
Dr. S. Kondaiah is thankful to UGC, New Delhi, India, for the financial support from UGC Minor Research Project Grant (Sanction letter: F. No.: 4–4/2014–15(MRP-SEM/UGC-SERO). Dr.Seku wishes to thank the Principal and the Management of Malla Reddy Engineering College (Autonomous) for research facilities.
Compliance with ethical standards
Conflict of interests
There is no conflict of interest among the authors to publish the work.
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