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As the world is at present confronting tremendous issues concerning the atmosphere, energy, and the environment, catalysis innovations have all the earmarks of being getting critical to energy, synthesis process, and environmental areas. In the recent years, transformation of the research on catalytic activities and advanced catalyst was seen with the advancement of nanotechnology. Undoubtedly, the utilization of nanomaterials in catalysis and, all the more especially, inorganic nanoparticles has pulled in many research attempts over the globe to create imaginative and greener conventions. These nanoparticles can be used as the catalyst or as mediator and can encourage the reactant procedure in new medium such as, water. Besides, attributable to their little size and expanded surface area, nano-catalysts have obviously risen as offering an interesting candidate at the interface among homogeneous and heterogeneous catalysis, taking into consideration an expanded response rate. Furthermore, nanoparticles give extra reactant functionalities because of their interesting inherent properties (e.g., nanomagnetism, photocatalytic activity). Along these lines, in this pursuit for eco-friendly and more affordable catalyst, nano-catalysis is turning into a significant field in science, which is applied broadly in the academics and industrial areas. This brief review principally centered around portraying the major comprehension of nano-catalysis, how remarkable catalytic property and other explicit properties of nanomaterials rely upon its size and structure at the nano level.

The present study reports the structural and morphological investigation of La3+ doped BaTiO3 nanoceramics prepared by combustion synthesis. The effect of La3+ doping on the structural and morphological properties was examined by the X-Ray diffraction (XRD), transmission electron microscopy (TEM) and selected area electron diffraction (SAED) technique. Room temperature XRD analysis shows that prepared samples are in a single phase with the tetragonal structure. Structural parameters like average crystallite size (D) and lattice constant (a and c) were calculated from the XRD data. The surface morphology of the samples was studied by transmission electron microscopy (TEM) technique. It was found that the nanoparticles are in tetragonal shape with agglomeration to the some extent. All the outcomes show that La doped BaTiO3 nanoceramics are promising candidates for spintronic applications.

A facile and cost-effective preparation of nanoscale TiO2 with enhanced surface area was achieved through gel-combustion technique assisted via glycine as a fuel. X-ray diffraction studies confirmed the anatase phase and nanocrystalline formation of TiO2 nanoparticles (NPs). Using N2 adsorption-desorption curve, the enhanced surface area (54.3m2g−1) of TiO2 NPs was noted. Visible light driven photocatalytic activity of the TiO2 NPs for the degradation of Methylene Blue (MB) dye was studied. The complete degradation of MB dye under sunlight irradiation was achieved in 120min. All the outcomes show that prepared TiO2 nanoparticles have excellent visible light driven photocatalytic activity for the active degradation of MB dye.

Poly(ethylene glycol) (PEG)‐coated superparamagnetic MnFe2O4 ferrite nanoparticles are of great interest for application in magnetic fluid hyperthermia (MFH) due to their heat generation capability in an external alternating magnetic field, besides biocompatibility, and surface properties. MFH has emerged as a promising therapeutic approach for cancer treatment and is based on controlled heating tumor tissue through the accumulation of MnFe2O4 ferrite nanoparticles within cancer cells. In the present work, MnFe2O4 superparamagnetic ferrite nanoparticles via the chemical combustion method are synthesized. The preparation of PEGylated MnFe2O4 ferrite nanoparticles, which involves the attachment of such molecules at the surface, without the need for coupling agents or prior modification on the species involved. The conjugation of folate onto MnFe2O4 ferrite nanoparticles is confirmed by FTIR spectroscopy. The MnFe2O4 ferrite nanoparticles are colloidal stable. The obtained targeted PEGylated MnFe2O4 ferrite nanoparticles show superparamagnetic behavior with a saturation magnetization of 78.68 emu·g−1 at 300 K. Their specific absorption rate (SAR) ranged from 43.2 to 19.5 W g−1 in an alternating magnetic field of 5—20 kA m−1. The heat generated is sufficient to raise the sample temperature to the therapeutic range used in MFH establishing this system as promising candidates for use in MFH treatment.