Physico-Chemical Condition Optimization during Biosynthesis lead to development of Improved and Catalytically Efficient Gold Nano Particles.
Biosynthesis of nanoparticles has gained great attention in making the process cost-effective and eco-friendly, but there are limited reports which describe the interdependency of physical parameters for tailoring the dimension and geometry of nanoparticles during biological synthesis. In the present study, gold nanoparticles (GNPs) of various shapes and sizes were obtained by modulating different physical parameters using Trichoderma viride filtrate. The particles were characterized on the basis of visual observation, dynamic light scattering, UV-visible spectroscopy, transmission electron microscopy, fourier transform infrared spectroscopy, and X ray diffraction. While the size varied from 2-500 nm, the shapes obtained were nanospheres, nanotriangles, nanopentagons, nanohexagons, and nanosheets. Changing the parameters such as pH, temperature, time, substrate, and culture filtrate concentration influenced the size and geometry of nanoparticles. Catalytic activity of the biosynthesized GNP was evaluated by UV-visible spectroscopy and confirmed by gas chromatography-mass spectrometric analysis for the conversion of 4-nitrophenol into 4-aminophenol which was strongly influenced by their structure and dimension. Common practices for biodegradation are traditional, expensive, require large amount of raw material, and time taking. Controlling shapes and sizes of nanoparticles could revolutionize the process of biodegradation that can remove all the hurdles in current scenario.
CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India.
Madhuree
M
Kumari
CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India.
Aradhana
A
Mishra
CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India.
Shipra
S
Pandey
CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India.
Satyendra Pratap
SP
Singh
CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India.
Vasvi
V
Chaudhry
CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan 31, Mahatma Gandhi Marg, Lucknow, 226 001, India.
Mohana Krishna Reddy
MK
Mudiam
CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan 31, Mahatma Gandhi Marg, Lucknow, 226 001, India.
Shatrunajay
S
Shukla
CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan 31, Mahatma Gandhi Marg, Lucknow, 226 001, India.
Poonam
P
Kakkar
CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India.
Chandra Shekhar
CS
Nautiyal
D002384:Catalysis; D055598:Chemical Phenomena; D006046:Gold / Q000737:chemistry*; D055772:Green Chemistry Technology; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D010316:Particle Size; D017550:Spectroscopy, Fourier Transform Infrared; D014242:Trichoderma / Q000737:chemistry*; D014961:X-Ray Diffraction
D006046:Gold