ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Eco-friendly synthesis of gold nanoparticles using carboxymethylated gum Cochlospermum gossypium (CMGK) and their catalytic and antibacterial applications

Kondaiah Seku, Bhagavanth Reddy Gangapuram, Babu Pejjai, Mushtaq Hussain, Syed Sulaiman Hussaini, Narasimha Golla, and Kishore Kumar Kadimpati

Shinas College of Technology, Shinas, Sultanate of Oman

E-mail: kondareddyseku@gmail.com

Abstract: 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.

Keywords: Gold nanoparticles ; Carboxymethylated kondagogu gum ; Antibacterial activity ; Catalytic activity 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00722-z

Chemical Papers 73 (7) 1695–1704 (2019)