The growing awareness toward the environment is increasing commercial demand for nanoparticles by green route syntheses. In this study, alloy-like Ag−Au−Pd trimetallic nanoparticles have been prepared by two plants extracts Aegle marmelos... more
The growing awareness toward the environment is increasing commercial demand for nanoparticles by green route syntheses. In this study, alloy-like Ag−Au−Pd trimetallic nanoparticles have been prepared by two plants extracts Aegle marmelos leaf (LE) and Syzygium aromaticum bud extracts (CE). Compositionally different Ag−Au−Pd nanoparticles with an atomic ratio of 5.26:2.16:1.0 (by LE) and 11.36:13.14:1.0 (by LE + CE) of Ag:Au:Pd were easily synthesized within 10 min at ambient conditions by changing the composition of phytochemicals. The average diameters of the nanoparticles by LE and LE + CE are ∼8 and ∼11 nm. The catalytic activity of the trimetallic nanoparticles was studied, and they were found to be efficient catalysts for the glucose oxidation process. The prepared nanoparticles also exhibited efficient antibacterial activity against a model Gram-negative bacteria Escherichia coli. The catalytic and antimicrobial properties of these readymade trimetallic nanoparticles have hig...
Research Interests:
Ag2S is an important direct semiconductor material that receives considerable research interest because of its low toxicity and high chemical stability. This work reports an easy and novel route for the synthesis of hollow Ag2S particles... more
Ag2S is an important direct semiconductor material that receives considerable research interest because of its low toxicity and high chemical stability. This work reports an easy and novel route for the synthesis of hollow Ag2S particles by a sacrificial core method in surfactant containing aqueous media. Sulfur is used as a sacrificial core in this method and removed by dissolving in carbon disulfide. Core sulfur particles were synthesized in situ by acid catalyzed reaction of sodium thiosulphate in aqueous surfactant media. The particles ...
Nonionic surfactants are advantageous in a diversified range of applications from household cleaners, laundry detergents, and shampoo to paints, coatings, and food emulsifiers because of their low CMC and surface tension values over the... more
Nonionic surfactants are advantageous in a diversified range of applications from household cleaners, laundry detergents, and shampoo to paints, coatings, and food emulsifiers because of their low CMC and surface tension values over the ionic surfactants. Nonionic surfactants, in general, are very useful in mixed surfactant systems because of their electrical neutrality. Among the similar class of nonionic surfactants, structural difference is important in the performance. In this study, we report on the adsorption and wetting behavior of two nonionic surfactants (TX-100 and Igepal CO-630) having the same head group but structurally different tail groups. The kinetics of adsorption follows a pseudo-second-order kinetic model and a Langmuir-type isotherm for both the surfactants. The change in contact angle with the concentration of surfactant follows a trend similar to that for adsorption onto a PTFE surface. At low surfactant concentration, Igepal CO-630 shows a slightly higher ads...
Research Interests:
Adsorption of ionic and nonionic surfactants on low surface energy hydrophobic PTFE−water interfaces in the absence and presence of electrolytes have been studied here. The objective of this study is to see the surfactant adsorption... more
Adsorption of ionic and nonionic surfactants on low surface energy hydrophobic PTFE−water interfaces in the absence and presence of electrolytes have been studied here. The objective of this study is to see the surfactant adsorption behavior in the presence of electrolytes that may reduce the consumption of surfactants. The kinetics of adsorption fits well pseudo-second-order kinetic model for the three surfactants studied here. Adsorption isotherms of TX-100 follow Langmuir type, whereas sodium dodecylbenzene sulfonate (SDBS) and cetylpyridinium bromide (CPB) follow Freundlich type. However, in the presence of electrolytes both the ionic surfactants show better fitting with Langmuir type isotherm. The effect of electrolytes on the surfactant concentration far below the CMC shows there is a linear increase in amount adsorbed with the increase in ionic strength of the electrolyte mainly due to reduction in headgroup repulsion and finally reaches a plateau level when the equilibrium c...
Research Interests:
The wetting of hydrophobic and hydrophilic solid surfaces by surfactant solutions is an important research topic recently because of its profound practical applications. The wettability of two double-chain surfactants (cationic,... more
The wetting of hydrophobic and hydrophilic solid surfaces by surfactant solutions is an important research topic recently because of its profound practical applications. The wettability of two double-chain surfactants (cationic, didodecyldimethylammonium bromide or DDAB, and anionic, aerosol OT or AOT) solutions on poly(tetrafluoroethylene) (PTFE) and glass surfaces has been investigated here. Different physicochemical parameters such as critical micelle concentration (CMC) and surface tension, contact angle, surface excess at air−water and solid-water interfaces, work of adhesion, and free energy of wetting have been estimated for two double-chain surfactants solutions and compared with the reported results of single-chain surfactants. The double-chain surfactant solutions showed maximum lowering of surface tension values (24.36 and 26.35 mN/m for DDAB and AOT, respectively) and a change in contact angle values from pure water on PTFE (∼38° for DDAB and AOT) and glass (∼26.5 and 24...
Research Interests:
Research Interests:
Research Interests:
Research Interests: RSC()
()
Research Interests:
Research Interests: RSC()
()
Research Interests: RSC()
()
Research Interests: RSC()
()
Research Interests: RSC()
()
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
The adsorption of anionic - sodium dodecylbenzenesulfonate (NaDBS), cationic cetyl trimethyl ammonium bromide (CTAB) and nonionic - Triton X-100 (TX-100) surfactants under different conditions on cellulose-water interface are... more
The adsorption of anionic - sodium dodecylbenzenesulfonate (NaDBS), cationic cetyl trimethyl ammonium bromide (CTAB) and nonionic - Triton X-100 (TX-100) surfactants under different conditions on cellulose-water interface are investigated. The adsorption ...
Research Interests:
Research Interests:
The kinetics of adsorption of anionic, nonionic, and cationic surfactants on a cellulose−water interface were investigated. The effects of monovalent, divalent, and a mixture of mono-and divalent salts on the adsorption kinetics of... more
The kinetics of adsorption of anionic, nonionic, and cationic surfactants on a cellulose−water interface were investigated. The effects of monovalent, divalent, and a mixture of mono-and divalent salts on the adsorption kinetics of anionic surfactant were also investigated. The ...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests: Engineering, Physical Chemistry, Soil, Water, Density, and 20 moreEnvironmental Pollution, Adsorption, Biodegradation, Micelles, Temperature, Colloids, Surface Water, Surfactant, Soils, Displacement, Sol, Solubility, Field Study, CHEMICAL SCIENCES, Phosphate solubilization, Contaminated soil, Surface Active Agents, Water soluble polymers, Decontamination, and Soil Pollutants(Environmental Pollution, Adsorption, Biodegradation, Micelles, Temperature, Colloids, Surface Water, Surfactant, Soils, Displacement, Sol, Solubility, Field Study, CHEMICAL SCIENCES, Phosphate solubilization, Contaminated soil, Surface Active Agents, Water soluble polymers, Decontamination, and Soil Pollutants)
(Environmental Pollution, Adsorption, Biodegradation, Micelles, Temperature, Colloids, Surface Water, Surfactant, Soils, Displacement, Sol, Solubility, Field Study, CHEMICAL SCIENCES, Phosphate solubilization, Contaminated soil, Surface Active Agents, Water soluble polymers, Decontamination, and Soil Pollutants)
Research Interests: Engineering, Thermodynamics, Water, Kinetics, Carbon, and 19 moreSelf Assembly, Atomic Force Microscopy, Adsorption, Micelles, Silica, Temperature, Colloids, Experimental Study, CHEMICAL SCIENCES, Time Factors, Liquid-liquid and liquid-solid interface, Surface Active Agents, Anionic Surfactant, Adsorption Isotherm Models, Detergents, Salts, Cations, Ions, and Molecular Structure(Self Assembly, Atomic Force Microscopy, Adsorption, Micelles, Silica, Temperature, Colloids, Experimental Study, CHEMICAL SCIENCES, Time Factors, Liquid-liquid and liquid-solid interface, Surface Active Agents, Anionic Surfactant, Adsorption Isotherm Models, Detergents, Salts, Cations, Ions, and Molecular Structure)
(Self Assembly, Atomic Force Microscopy, Adsorption, Micelles, Silica, Temperature, Colloids, Experimental Study, CHEMICAL SCIENCES, Time Factors, Liquid-liquid and liquid-solid interface, Surface Active Agents, Anionic Surfactant, Adsorption Isotherm Models, Detergents, Salts, Cations, Ions, and Molecular Structure)
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Ag2S is an important direct semiconductor material that receives considerable research interest because of its low toxicity and high chemical stability. This work reports an easy and novel route for the synthesis of hollow Ag2S particles... more
Ag2S is an important direct semiconductor material that receives considerable research interest because of its low toxicity and high chemical stability. This work reports an easy and novel route for the synthesis of hollow Ag2S particles by a sacrificial core method in surfactant containing aqueous media. Sulfur is
used as a sacrificial core in this method and removed by dissolving in carbon disulfide. Core sulfur particles were synthesized in situ by acid catalyzed reaction of sodium thiosulphate in aqueous surfactant media. The particles were characterized by using different instrumental techniques, showing 67% improved light emission capacity in terms of quantum yield compared to solid Ag2S particles. The same
route is also suggested to prepare other nanoparticles.
used as a sacrificial core in this method and removed by dissolving in carbon disulfide. Core sulfur particles were synthesized in situ by acid catalyzed reaction of sodium thiosulphate in aqueous surfactant media. The particles were characterized by using different instrumental techniques, showing 67% improved light emission capacity in terms of quantum yield compared to solid Ag2S particles. The same
route is also suggested to prepare other nanoparticles.