Solid State Synthesis of LiNiO2

Bimetallic oxide nanomaterials are synthesized by solid state combustion route integrates the synthetic chemistry. Simply, burning of two metal oxides in presence of polymer fuel for its bimetallic oxide nanomaterials. Nanosized lithium niobate material is prepared by self-propagating combustion methods using polymer as a fuel. Lithium oxide and nickel oxide with polyvinyl alcohol was ignited in an open atmosphere for few minutes to form lithium niobate residue. As prepared lithium niobate sample was well characterized for its structure by employing powder X-ray diffraction (XRD) tool. The morphology of as prepared lithium niobate material was studied by Scanning Electron Micrograph (SEM) tool. Fourier Transform infrared (FTIR) spectral study was undertaken to know the bonding in the prepared bimetallic oxide sample

Green Synthesis and Characterization of Silver Nanoparticles using Piper Betel Leaf Extract

Green synthesis of nanoparticles by biological reduction method using plant extract is recent development in synthetic chemistry. The green method of nanoparticles is easy, efficient and eco-friendly on comparison with other methods. Silver nanoparticles are synthesized by biological reduction of silver nitrate. Betle leaf extract was used to reduce the silver salt in to its silver nanoparticles. As prepared silver nanoparticles sample was characterized for its structure by employing powder X-ray diffraction (XRD) tool. The morphology of said metal nanoparticle was studied by Scanning Electron Micrograph (SEM) tool. Fourier Transform infrared (FTIR) spectral study was undertaken to know the bonding in the prepared silver sample. Formation of Ag particles was confirmed by energy dispersive X-ray analysis (EDX) study.Key words: Green synthesis, nanoparticle, Betle leaf extract, XRD, SEM, FTIR, EDX* Author for correspondence:  [email protected]

Synthesis and Characterization of Nanosized Zirconium Titanate Dispersed Polyaniline Nanocomposite

The recent development in the synthesis of bi-metal oxide nanomaterials through a new synthetic technique upgrades the science and technology of nanoscale materials. Zirconium titanate (ZrTiO4) is synthesized by solid-state combustion reaction usingZrO2 and TiO2 at high temperature.ZrTiO4nanomaterial dispersed polyaniline to form its nanocomposite (ZrTiO4-PANI) is carried out by in-situ polymerization of aniline using ammonium peroxide as an oxidising agent. ZrTiO4-PANI nanocompositeis well characterized by various characterization tools. Structural characterization is carried out by X-ray diffraction (XRD) andmorphology by Scanning Electron Micrograph (SEM) tool. The bonding nature of the sample was studied by Fourier transform Infrared (FT-IR). Presence of  metals like Zr and Ti in the nanocomposite was confirmed by Energy Dispersive X-ray microanalysis (EDX) study

Thermal and morphological studies of chitosan and agar-agar blends

Many researchers are attracted to Chitosan based blends due to its properties and potential applications in various fields. The advanced development of Chitosan blends integrates the science and technology of blended materials. The present experimentation is reporting the preparation of Chitosan and Agar-Agar blends (CCA) by chemical mixing of these materials at different compositions. The thermal studies of the prepared blends were studied by differential scanning colorimeter (DSC) and thermogravimetric analysis (TGA) tools. Thermal studies reveal that the lowest degradation temperatures of blends might be attributed to the partial miscibility of CAA blends at particular composition and miscibility due to single glass transition temperature (Tg) between Chitosan and Agar-agar. Bonding nature of sample blends were carried out by Fourier transform infrared (FT-IR) instrumentation. This study reveals the interaction between Chitosan and Agar-agar is partial miscibility. Morphological study reveals that a few aggregated particles, which suggest the partial miscibility of CAA blends. Homogeneity of blend compositions and specific intermolecular interactions of hydrogen bonding type is also observed

Microwave-assisted synthesis and characterizations of nanosized copper ferrite and barium titanate for antimicrobial applications

Science and technology of nanosized bimetallic oxide nanomaterials records the various properties and applications. Especially biomedical applications are viewed in particular due to its nanosized particle size. The present experimentation is reporting the microwave-assisted synthesis of nanosized bimetallic oxides like copper ferrite (CuFe2O4) and barium titanate (BaTiO3) by solid state combustion route using poly (vinyl alcohol) (PVA) as a fuel. The structural and morphological characterizations of the bimetallic oxide nanomaterials are performed out by X-ray diffraction (XRD) and scanning electron micrograph (SEM) tools respectively. These analyses report the crystalline nature of both samples. EDX spectral study is also undertaken to know the existence of different metals in the above-mentioned samples. Bonding nature of the bimetallic oxide samples were readied by Fourier transfer infrared (FT-IR) instrumentation. The study reviewed the varied vibrational modes confirms the phase formation of the samples. UV-Vis and thermal study of these bimetallic oxide samples are also studied extensively to know the thermal and absorption behavior respectively. TGA of both the samples are traced and are showing decomposition at rapid rate. In addition, the maximum absorption peaks due to π - π* transition confirms the sample formation. Antimicrobial activity of the prepared oxide samples was studied for antibacterial and antifungal behavior. Both samples showing considerable activity against various bacteria and fungi

Microwave-assisted synthesis, characterisation and thermal study of nano sized metal aluminates

Metal oxide nanomaterials having multiple metals are synthesized by microwave combustion route encourage to the synthetic chemists because of its simplicity. Microwave burning of single phase oxide materials with polymer as a fuel to form its multiphase nanomaterials. Nano sized metal aluminates (CuAl2 O4, NiAl2 O4, CoAl2 O4) material is prepared by self-propagating combustion methods using polymer as a fuel. Single phased metal oxides (CuO, NiO, CoO) and aluminium oxide (Al2 O4) with polyvinyl alcohol was ignited in an open atmosphere and complete burning in microwave oven for about 15 minutes to form metal aluminate samples. The structure of as prepared metal aluminate samples arewell studied by employing powder X-ray diffraction (XRD) tool. The morphology of as prepared sample materials was studied by Scanning Electron Micrograph (SEM) and Transmission Electron Micrograph tool. Fourier Transform infrared (FT-IR) spectral study was undertaken to know the bonding in the prepared metal aluminate nanomaterials. The presences of the metals are confirmed by EDAX analysis and also thermal behaviour of the sample is well studied

Microwave-assisted route for synthesis of nanosized metal oxides

Microwave-assisted route for the synthesis of nanomaterials has gained importance in the field of synthetic technology because of its faster, cleaner and cost effectiveness than the other conventional and wet chemical methods for the preparation of metal oxide nanoparticles. In the present work, synthesis of metal oxide nanoparticles viz., γ-Fe2O3, NiO, ZnO, CuO and Co-γ-Fe2O3 were carried out by microwave-assisted route through the thermal decomposition of their respective metal oxalate precursors employing polyvinyl alcohol as a fuel. The metal oxide nanoparticles are then characterized for their size and γ to α (in γ-Fe2O3) transition and structure by employing powder X-ray diffraction (XRD) pattern, high-temperature X-ray diffraction (HTXRD) pattern and Fourier transform infrared (FT-IR) spectral studies. The morphology of the samples ranged from nanorods to irregular-shaped particles for different metal oxide samples on the basis of scanning electron microscopy and transmission electron microscopy images. Frequency-dependent dielectric study of the ferrite samples (γ-Fe2O3 and Co-Fe2O3) showed a similar behaviour, where the dielectric constant decreased rapidly with increase in frequency. Possible explanation for this behaviour is given