Currently Published Papers in Green Chemistry

Biosynthesis and Characterization of Silver Nano Particles against Food Borne Pathogens

Cibi Komalan and Sreelakshmi K,DOI: 10.24214/IJGHC/GC/7/4 /80313.

: In this communication, very simple, low-cost and facile method for the synthesis of silver nanoparticles using Averrhoa bilimbi leaf extract is reported. Conventional methods for the synthesis of AgNPs have many disadvantages. Biosynthesis provides a cost-effective, non-toxic, and environment friendly method for the synthesis of nano particles. The biosynthesized AgNPs were characterized by UV-VIS spectroscopy, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), X-Ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). The synthesized AgNPs showed a distinct surface Plasmon peak at 410 nm and also the colour of the solution changed to reddish brown. The TEM and SEM images revealed that the morphology of AgNPs is almost spherical with an average size of 10 to 15 nm. Crystalline nature and purity of the AgNPs were evident from the characteristic XRD pattern. XRD-analysis showed intense peaks corresponding to (111), (200), (220), (311), (222) planes of face centered cubic structure of metallic silver. FTIR was used to find out the specific functional group responsible for the reduction of silver nitrate to AgNPs. The antibacterial effect of AgNPs was determined by well diffusion method. The AgNPs showed antibacterial activities against food borne pathogens Escherichia coli and Listeria monocytogene.The antibactericidal effect increases with increase in the concentration of AgNPs. The promising results of biosynthesised AgNPs suggest its usage as an effective antibacterial agent to ensure food safety. These AgNPs can be incorporated with food package materials to prevent the attack and contamination of the food by the food borne pathogenic bacteria and hence corroborate the food safety.

Synthesis and application of new tamarind based TTCEA resin for removal of toxic metals from industrial waste water

Vikal Gupta, Meenakshi Choudhary, Pramila Ratnoo,DOI: 10.24214/IJGHC/GC/7/4 /79702

The present work describes adsorption behavior of chemically modified tamarind based resin with respect to cadmium, iron, chromium and lead. This work has been used to consider application of resin for treatment of industrial waste water. TKP (Tamarind Kernel Powder) is a low-cost adsorbent which has hydrophilic polysaccharide matrix for synthesizing chelating resin. Here Alanine group has been anchored on the TKP backbone in dioxane medium. Further resin has been prepared with the help of cyanuric chloride. Modified bifunctional TKP resin acts as a flocculent cum metal ion exchanger and can also be used as scavenger for harmful toxic metal ions from the effluents of metallurgical industries. The maximum removal efficiency of resin has been found to be 81.3% at pH 8.This resin is also environmental friendly.

Activated carbon supported ionic liquid as highly efficient and reusable catalyst for synthesis of 1,8- Dioxooctahydroxanthene derivatives

M.B. Swami, A.H. Jadhav, N.V. Ghule, S.S. Mahurkar, S. R. Mathapati, A.N.Patil &S.G. Patil,DOI: 10.24214/IJGHC/GC/7/4 /78896

AC-IL-Br has been proved to be an highly efficient and ecofriendly catalyst for conversion of 5,5-dimethyl 1,3-cyclohexanedione and substituted aldehydes to 1,8-dioxooctahydroxanthene derivatives. The heterogeneous catalyst was prepared and characterized by using various advanced analytical techniques and employed in present reaction. The catalyst could be easily separated by simple filtration and reused furtherup to six cycles without loss of catalytic activity. Key advantage of this method is high yield, short reaction time, low cost, simple and easy work-up procedure.

An efficient and green synthesis of 2,3- dihydroquinazolin-4(1H)-one derivatives catalyzed by
{[bmim]Methanesulfonate} ionic liquid

Shreyas S. Mahurkar and Sangita S. Makone,DOI: 10.24214/IJGHC/GC/7/4 /77987.

 1-butyl, 3-methyl imidazolium methanesulfonate {[Bmim]CH3SO3} ionic liquid was found to be an efficient catalyst for the preparation of 2,3-dihydroquinazolin-4(1H)-one derivatives by the one pot three component condensation of isatoic anhydride, primary amine and aromatic aldehydes in ethanol : water solvent system. This procedure has several advantages such as short reaction time, easy work-up, excellent yields and reuse of ionic liquid

Synthesis and Structural Studies of Zinc Oxide Nanoparticle from Alternanthera Sessilliesis Plant

R.Vanitha and C.Kavitha,DOI: 10.24214/IJGHC/GC/7/4 /77078

Alternanthera sessillies is the one of the Ayurveda flatulence wounds cough bronchitis and diabetes this plant is also an important ingredient of several compounds of ayurvedic preparation. The plant is used throughout Asia and Africa to treat a verity of disorders including gastrointestinal problems such as flatulence nausea and vomiting, headaches, bronchitis, asthma, vertigo and even hepatitis. It is consider being one of those drugs which prevents & cures chronic diseases and rejuvenates the body. In nanotechnology, a particle is defined as a small object that behaves as a whole unit in terms of its transport & properties. The Particles are further classified according to size in terms of nano particles are particles between 1 and 100 nanometers in size. Zinc oxide nanoparticles (ZnO NPs) are known to be one of the most multifunctional inorganic nanoparticles with its application in treatment of many diseases such as ayurvedic flatulence wounds, cough, bronchitis and diabetes. The zinc oxide nanoparticles were synthesized using Alternanthera Sessilliesis fresh leaf extract and were characterized by UV spectroscopy (UV), X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Therefore, the study reveals an efficient, eco-friendly and simple method for the green synthesis of multifunctional ZnO NPs using Alternanthera Sessilliesis.