Showing papers by "Shivaji University published in 2019"
TL;DR: The Ag NPs as a disinfectant in different sectors have been included in detail in this review.
444 citations
TL;DR: In this paper, the suspension of hydrophobic silica nanoparticles was dip and/or spray coated on the body of a motorcycle, building wall, mini boat, solar cell panel, window glass, cotton shirt, fabric shoes, paper (currency notes), metal, wood, sponges, plastic and marble.
333 citations
TL;DR: In this paper, the authors describe the recent progress in passive anti-icing coating materials and methodologies and describe the role of SLIPS in anti-ice coating and their use.
160 citations
TL;DR: In this article, a review paper deals with the mechanical properties evaluation of PALF and several factors influencing properties such as type of variety, fibre length, matrix type, fibre orientation, voids and porosity content.
Abstract: The environmental problems associated with the production, disposal and recycling of synthetic fibre based polymer composites has prompted the development of eco-friendly natural fibres. It involves use of kenaf, jute, oil palm, cotton, flax, banana, hemp, sisal and pineapple leaf fibre (PALF) for various applications such as automotive, infrastructure, biomedical, furniture, packaging etc. PALF will be important in material development for structural and non structural industrial products with other natural and synthetic fibres with different matrix. This review paper deals with the mechanical properties evaluation of PALF and several factors influencing properties such as type of variety, fibre length, matrix type, fibre orientation, voids and porosity content. Recent research in the advancement of mechanical properties of PALF as reinforcement in thermoset, thermoplastic and biodegradable resins are briefly provided. Attempts have been made to characterize PALF as a hybrid composite with other natural and synthetic fibres. Surface treatments to improve the interfacial and interphasial PALF - matrix interaction with consideration of coupling agents for mechanical strength improving requirements are discussed. Along with limitations, technical solutions to the traditional problems of natural fibre composite processing, tensile properties improvement, durability, thermal stability and interfacial incompatibility enhancement are discussed. Overall, this review article investigates highlights and identifies gaps in the earlier research work. It provides the resourceful tabulated data for continuing future research in various streams with PALF as reinforcement.
147 citations
TL;DR: Among all prepared particles, ZnO nanoparticles with least size exhibited remarkable antibacterial and antibiofilm activity which may serve as potential alternatives in biomedical application.
Abstract: The present investigation deals with facile polyol mediated synthesis and characterization of ZnO nanoparticles and their antimicrobial activities against pathogenic microorganisms. The synthesis process was carried out by refluxing zinc acetate precursor in diethylene glycol(DEG) and triethylene glycol(TEG) in the presence and in the absence of sodium acetate for 2 h and 3 h. All synthesized ZnO nanoparticles were characterized by X-ray diffraction (XRD), UV visible spectroscopy (UV), thermogravimetric analysis (TGA), fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy(FESEM), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX) technique. All nanoparticles showed different degree of antibacterial and antibiofilm activity against Gram-positive Staphylococcus aureus (NCIM 2654)and Gram-negative Proteus vulgaris (NCIM 2613). The antibacterial and antibiofilm activity was inversely proportional to the size of the synthesized ZnO nanoparticles. Among all prepared particles, ZnO nanoparticles with least size (~ 15 nm) prepared by refluxing zinc acetate dihydrate in diethylene glycol for 3 h exhibited remarkable antibacterial and antibiofilm activity which may serve as potential alternatives in biomedical application.
146 citations
TL;DR: The sufficient conditions for existence and uniqueness of solutions and δ -Ulam–Hyers–Rassias stability of an impulsive fractional differential equation involving ψ -Hilfer fractional derivative are investigated.
120 citations
TL;DR: In this article, the main strategies used for the removal of dyes from water by using silica nanoparticles are discussed, including bare, core-shell and polymer-grafted.
119 citations
TL;DR: A combination of photocatalysis and biodegradation is a promising approach for the removal of xenobiotic organic compounds from wastewater, since photocATalysis cleaves the molecules into simpler intermediates that are later mineralized by microorganisms.
118 citations
TL;DR: Results suggest that the thermoresponsive copolymer acts as a gatekeeper for the temperature-controlled release of the drug loaded inside the mesopores of MMSNP-PNIPAM-co-MPS.
105 citations
TL;DR: In this paper, the first report of collagen extraction from skin of black ruff where lactic acid with 45% yield proved to be an efficient solvent was presented. And the extracted collagen showed emulsifying activity index as 20.24m2m2g−1 and emulsion stability index of 15.86min.
Abstract: Skin of Centrolophus niger (black ruff) commonly referred as Medusa, is used for the extraction of Acid Soluble Collagen. This is the first report of collagen extraction from skin of black ruff where lactic acid with 45% yield proved to be efficient solvent. SDS-PAGE, UV visible absorbance, FT-IR and SEM analysis confirmed that extracted collagen is native type I. Extracted collagen showed emulsifying activity index as 20.24 m2 g−1 and emulsion stability index of 15.86 min. Collagen was used for the preparation of collagen-chitosan film which could be used for food packaging purpose. Film incorporated with 5% pomegranate peel extract declined solubility in water remarkably and showed antibacterial effect against food borne pathogens like Bacillus saprophyticus LNB 333F5, Bacillus subtilis NCIM 2635, Salmonella typhi NCIM 2501 and Escherichia coli NCIM 2832. Thus, present study deals with extraction and characterization of collagen from fish waste and its application in the development of antibacterial active food packaging film.
91 citations
TL;DR: In this paper, the authors evaluated the interactive effect of four process variables on the sorption of crystal violet (CV) dye using Box-Behnken design and showed that maximum sorption (99.85%) of CV dye was demonstrated on mango leaves biochar (MLBC) within 48min of incubation at pH 8 and 47°C temperature.
TL;DR: In this paper, a review of the back contact interface and interface related defects, besides different solutions to overcome these defects in detail, is presented, and the plausible band theory of back contact interfaces in the presence of interfacial MoS(e)2 layer and the criteria for ideal back contact are also addressed.
TL;DR: A unified sample preparation approach for high-throughput multi-residue analysis of veterinary drugs and pesticides in a single sub-sample of bovine milk would be ideal for regulatory analysis of analytes ranging from non-polar organochlorine pesticides to polar drugs, including penicillins, quinolones, and tetracyclines.
TL;DR: In this article, an effective consortium of bacteria (Brevibacillus laterosporus) and yeast (Galactomyces geotrichum) were immobilized in different support matrices including calcium alginate, polyvinyl alcohol, stainless steel sponge and polyurethane foam to investigate the decolorization of a model azo dye, Remazol red and textile industry effluent.
28 Mar 2019
TL;DR: In this article, the authors demonstrate the preparation of nitrogen-doped carbon dots (N-CDFs) for sensitive and selective detection in biomedical analysis, and demonstrate the use of carbon dioxide in the detection process.
Abstract: The development of a novel uncomplicated sensor for sensitive and selective detection in biomedical analysis is necessary. This study demonstrates the preparation of nitrogen-doped carbon dots (N—C...
TL;DR: In this paper, the authors synthesized several nanostructures, including nanoflakes-, nanosheets-, and nanopetals-like NiCo2S4 flexible electrodes on a flexible stainless-steel substrate, by using successive ionic layer adsorption and reaction method.
TL;DR: In this article, an ecofriendly and sustainable approach to recycle the waste toner powder enriched in organic residues and magnetic Fe3O4 was reported, which can be used for wastewater treatment.
Abstract: In this work, we report an ecofriendly and sustainable approach to recycle the waste toner powder enriched in organic residues and magnetic Fe3O4. The direct calcination of waste toner powder at 600 °C ensures the complete decomposition of organic residues and transformation of Fe3O4 into useful magnetic Fe2O3 without any single chemical treatments. We also exploit the e-waste derived Fe2O3 as an iron precursor and thiourea for the fabrication of g-C3N4-Fe2O3 photocatalyst through facile one-step calcination process. The obtained Fe2O3 and g-C3N4-Fe2O3 were characterized by XRD, TGA, SEM-EDS, TEM, BET, XPS, UV–vis. DRS, FT-IR, PL, EIS and VSM. The photocatalytic activity of the g-C3N4-Fe2O3 was evaluated by the degradation of Methyl Orange (MO) and Textile Effluents (TE) under sunlight. The resultant g-C3N4-Fe2O3 exhibited better photocatalytic activity than the Fe2O3 and g-C3N4. Owing to the excellent stability and magnetic separation ability, g-C3N4-Fe2O3 composite displayed superb recyclability without loss of significant photocatalytic activity up to five repeated runs and more significantly, it can be recovered magnetically. This novel e-waste recycling strategy may provide new possibilities for a large-scale and low-cost transformation of waste toner powder into magnetically separable photocatalyst for wastewater treatment.
TL;DR: In this article, a simple wet chemical method with subsequent annealing was used to prepare Cu-doped ZnO nanorods for detecting toxic gases like NO2.
Abstract: In this report, we have prepared Cu-doped ZnO nanorods by a simplistic wet chemical method with subsequent annealing. The phase formation, optical, surface morphological studies along with the electrical properties of the Cu doped ZnO thin films were characterized by X-ray diffraction (XRD), photoluminescence (PL), field emission scanning electron microscopy (FESEM) and Hall measurements, respectively. The addition of copper (Cu) in to the matrix of ZnO influenced the surface morphology of the product dramatically. The regular hexagonal nanorods-like surface morphology of ZnO becomes a broken rod-like morphology, after addition of copper. Owing to the complexes surface morphology of Cu doped ZnO, the system was used to detect the toxic gases like NO2. The effect of doping on the gas-sensing properties of ZnO was slightly counterintuitive in that they initially increased up to Cu concentrations of 1% before beginning to decline. Meanwhile, the Cu doped ZnO exhibited the gas response of ˜ 71 for 1 ppm of NO2 gas at low operating temperatures. This higher gas sensing response is due to the defect states observed in Cu doped ZnO films. In addition to above mentioned findings, the transformation of n-type ZnO to p-type Cu doped ZnO was also observed. The p-type conductivity is attributed to the holes created in the merging of Cu on Zn sites.
TL;DR: This paper identifies the trusted path and provides the secure routing paths using trust and Cuckoo search algorithm and proves that proposed system provides the assurance to prolong the network lifespan and the probability of secure routing path in the network.
Abstract: In the recent era, security is the major problem in sensor networks. Wireless sensor networks (WSNs) are mostly used for various real-world applications. However, WSNs face a lot of insider and outsider attacks, and it is complex to identify and protect towards insider attacks. Generally, an insider attack, in which the intruders choose several received data packets to drop, threatens the clustered WSNs. This situation has occurred because of the unattended clustered environments in the network. To overcome this problem, this paper proposes a trustable and secure routing scheme using two-stage security mechanism, and dual assurance scheme, for selecting the node and securing the data packet for WSNs. Both schemes are based on Active Trust to protect several kinds of attacks, such as black hole attack, and selective forwarding attack, during routing. Therefore, this paper identifies the trusted path and provides the secure routing paths using trust and Cuckoo search algorithm. Energy is the performance parameter utilized in the proposed scheme. The experimental result proves that proposed system provides the assurance to prolong the network lifespan and the probability of secure routing path in the network.
TL;DR: In this article, a simple, cheap, cost-effective and sustainable kitchen waste tea residue was used as an adsorbent to remove Hydralazine hydrochloride pharmaceutical pollutant from wastewater in aqueous media.
TL;DR: In this article, polythiophene (PTh) thin films were synthesized using an in situ chemical oxidative polymerization route, and the double negative characteristics (negative permittivity and permeability) appeared simultaneously in the as-prepared PTh thin films.
TL;DR: In this paper, an ultrasonic-assisted sol-gel method was used to obtain TiO2/WO3 nanocomposites (NCs) and acid functionalized by using chlorosulfonic acid.
TL;DR: In this article, a novel NiCo2O4/NiCo2S4 powder was synthesized by co-precipitation and thin films prepared using a screen-printing method on Ni mesh for supercapacitor applications.
TL;DR: In this paper, waste tea residue, abundantly accessible, is utilized for synthesis of fluorescent carbon dots (CDs) by a simple, low cost and one step chemical oxidation method, which resulted in quantification of tetracycline in real sample which achieved almost 99% recoveries indicated excellent practical potential.
TL;DR: In this paper, the polypyrrole/Ba0.6Sr0.4Fe12O19 (PBSF) composite was synthesized via in-situ polymerization technique.
TL;DR: Supercapacitor performance of the Co( OH)2 electrodes suggest that, specific capacitance are depends on the surface morphology, and Co(OH)2 electrode after ultrasonic treatment exhibited higher performance than without ultrasonication.
TL;DR: In this paper, a lightweight and highly porous magnetic polymer foam (MPF) composites were synthesized using a simple, efficient, and environmentally friendly strategy using a surfactant and by varying the amount of Fe 3 O 4 nanoparticles (NPs) added to the emulsion solution used in their preparation.
TL;DR: The Gardenia, traditional medicinal plant used from ancient time to increase appetite and other medicinal uses has been employed for the synthesis of superparamagnetic α-Fe2O3 nanoparticles proving them as a potential candidate for the biomedical applications.
TL;DR: In this article, copper oxide (CuO) thin films were synthesized at different deposition temperatures on fluorine doped tin oxide coated glass (FTO) substrates by spray pyrolysis for supercapacitor applications.
TL;DR: In this paper, the authors presented Co-doped TiO2 nanoparticles based anode with good reversibility, cycling stability and rate capability performance for its envisaged application in lithium-ion battery.
Abstract: TiO2 is a good alternative anode material for lithium-ion battery application because of its incomparable high structural stability and safety during the charge/discharge cycles. However, the low intrinsic conductivity of TiO2 has been a limiting factor affecting its cycling and rate capability performance. Here in this work, we present Co-doped TiO2 nanoparticles based anode with good reversibility, cycling stability and rate capability performance for its envisaged application in lithium-ion battery. The Co-doped TiO2 nanoparticles with different Co concentrations (3%, 5%, and 7%) are synthesized using simple and economic biomediated green approach, wherein TiCl4 and Co precursors are allowed to react in Bengal gram bean extract containing biomolecules which act as natural capping agents to control the size of nanoparticles. Among the pure TiO2 and different Co-doped TiO2 samples, the 7% Co-doped TiO2 anode show the highest capacity of 167 mAh g−1 (88.3%) after 100 cycles at the 0.5C current density. The Co-doped TiO2 shows higher and stable coulombic efficiency up to 100 GCD cycles indicating good reversibility. Based on the results, it is expected that the Co-doped TiO2 nanoparticles might be contributing to the enhanced electronic conductivity providing an efficient pathway for fast electron transfer.