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Neodymium vanadate nanoparticles (NdVO 4 NPs) have recently garnered significant attention due to their distinct physical and chemical features and utilization at the cutting edge of various biomedical fields. This review provides an in-depth investigation of the vast array of biomedical applications associated with NdVO 4 NPs. An overview of NdVO 4 NPs and various synthesis and characterization techniques are among the key topics covered in the discussion. This review covers the electrochemical processes, photocatalytic and Sensing activity of the nanoparticle in great detail. The investigation of the possible biological, environmental, and photocatalytic uses of NdVO 4 NPs highlights their complex character even further. Additional potential uses are also investigated. NdVO 4 NPs have significant effectiveness, but there are drawbacks, which are discussed in this paper. The paper ends with a fruitful discussion of future research prospects, paving the way for NdVO 4 NPs to progress in various medicinal applications.

Current study represents the effective synthesis of neodymium vanadate (NdVO 4 ) nanoparticles in the presence of ammonium metavanadate and neodymium nitrate hexahydrate as the precursors. Temperature and three various green capping agents such as, ethyl cellulose, starch and tween 80 were used to investigate how they can influence morphology, photocatalytic properties, and particle size of final products. Also, paramagnetic behavior of as-obtained NdVO 4 at room temperature, was confirmed by VSM analysis. Additionally, degradation of methyl orange as an azo dye was selected to assess photocatalytic performance of NdVO 4 (maximum 97%) under visible light irradiation. Several analysis such as UV–Vis spectroscopy, EDX, XRD, SEM and VSM were employed to explore optical, morphological and magnetic properties of as-obtained products.

The present work reports the synthesis of La x Nd 1− x VO 4 where x  = 0, 0.05, 0.10 and 0.15 by a solution based co-precipitation method at pH = 12 calcined at 650 °C in nanoparticle form. The novelty of the present work is preparation and various applications of targeted materials by using a traditional liquid-based technique at room temperature without use of any surfactants. The structural, morphological, optical and luminescent properties of as-obtained compositions were characterized by various techniques such as powder X-ray diffraction (PXRD) followed by Rietveld refinement, high-resolution transmission electron microscopy (HRTEM) with selected area electron diffraction (SAED), ultraviolet–visible spectroscopy, Fourier transform infrared spectroscopy and photoluminescence spectroscopy. The PXRD diffraction patterns confirmed tetragonal structure with crystallite size ranging between 22 and 35 nm for all four compositions. The PXRD results are further validated by Rietveld refinement method with low values of profile parameters. HRTEM supplemented with SAED analysis revealed that with a change in doping concentration, there is a change in morphology from rod-shaped to porous hexagonal-shaped features. The optical band gap values are found to be in the range of wide-band semiconductors (2–4 eV). The dielectric properties of as-prepared La-doped NdVO 4 nanoparticles were investigated. The dielectric constant is low in x  = 0.0 composition, whereas it increases with an increase in La 3+ concentration.

Hollow nanostructures have attracted attention because of their unique physiochemical properties and broad potential applications in electronics, optics and photonics. In this study, a facile hydrothermal approach was developed to fabricate hollow ZnO microspheres via self-assembled rod-like nanostructures. The morphology-controlled synthesis was conducted by altering hydrothermal treatment temperature (150, 200 and 250 °C) in solutions containing zinc acetate dihydrate precursor and glycerol as the stabilizing agent. The morphological observations indicated that hydrothermally grown ZnO architectures could be reasonably adjusted by modulating hydrothermal reaction temperature. Possible growth routes are proposed to elucidate the formation process of ZnO microspheres with the rod-like nanostructures. Morphology-dependent absorbance and emission along with red-shifts with improved crystalline qualities were observed with increasing hydrothermal growth temperature. Kerr-type nonlinear optical characteristics examined using single-beam Z-scan technique in the near infrared spectral range under nanosecond Nd-YVO 4 laser pulses showed positive values of nonlinear refraction providing an evidence of self-focusing behaviors at the excitation wavelength of 1064 nm in all the samples studied. The highest Kerr-type nonlinear susceptibility was estimated to be 2.31 × 10 –6  esu for hollow ZnO microspheres grown at 250 °C, suggesting synergistic effects of surface morphologies on optical nonlinearities.

The article is devoted to studying synthesis of magnesium master alloys with neodymium for smelting ferrous and nonferrous metals. A salt composition is selected based on analysis of composition diagrams and flux requirements for melting magnesium alloys. Differential thermal analysis (DTA) is used to determine temperature ranges of thermal effects during melting components of a salt mixture KCl–NaCl–CaCl2 –MgCl2 –CaF2 –NdF3 and during reduction of neodymium compounds by magnesium. The result is a series of experimental melts revealing the main features of magnesium-neodymium master alloy synthesis, and the main factors of the metallothermal process affecting the degree of neodymium recovery. Metallographic study of the resulting magnesium-neodymium master alloys shows that a sample consists of colonies of Mg + Mg12Nd eutectic composition located at the boundaries of α –Mg dendrite cells. The method proposed for recovering neodymium from fluoride-chloride melts provides up to 99.6% extraction of neodymium.

We report on optical spectroscopic measurements in pure NdVO4 crystals at pressures up to 12 GPa. The influence of pressure on the fundamental absorption band gap and Nd3+ absorption bands has been correlated with structural changes in the crystal. The experiments indicate that a phase transition takes place between 4.7 and 5.4 GPa. We have also determined the pressure dependence of the band-gap and discussed the behavior of the Nd3+ absorption lines under compression. Important changes in the optical properties of NdVO4 occur at the phase transition, which, according to Raman measurements, corresponds to a zircon to monazite phase change. In particular, in these conditions a collapse of the band gap occurs, changing the color of the crystal. The changes are not reversible. The results are analyzed in comparison with those deriving from previous studies on NdVO4 and related vanadates.

In this paper, neodymium vanadate (NdVO 4 ) nanoparticles were synthesized via a new approach based on the reaction between neodymium nitrate hexahydrate and ammonium metavanadate in water. Besides, three carbohydrates such as fructose, galactose, and glucose were used to investigate their effects on the morphology and particle size of NdVO 4 nanoparticles. According to the vibrating sample magnetometer, neodymium vanadate (NdVO 4 ) nanoparticles indicated a ferromagnetic behavior at room temperature. To evaluate the catalytic properties of nanocrystalline neodymium vanadate, the photocatalytic degradations of methyl orange under ultraviolet light irradiation were carried out. The structural, morphological, magnetic, and optical properties of as-obtained products were characterized by techniques such as XRD, SEM, EDX, VSM, and UV–Vis spectroscopy.

Semiconductive nanometer-sized NdVO4 was synthesized by a solution combustion reaction of Nd(NO3)3·6H2O, V(NO3)3 and urea as a fuel. The process was a convenient, environment friendly, inexpensive and efficient preparation method for the NdVO4 nanomaterial. Effects of the 800 °C calcining temperature on the phase constituents was characterized by TG-DTA, X-ray diffraction (XRD), which was used to confirm the material's structure. The as-prepared samples were further characterized by scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM), to depict the crystallite microstructure. Conductance responses of the nanocrystalline NdVO4 thick film were measured by exposing the film to reducing gases like acetone, ethanol, ammonia (NH3), and liquefied petroleum gas (LPG). It was found that the sensors exhibited various sensing responses to these gases at different operating temperatures. Furthermore, the sensor exhibited a fast response and a good recovery. The results demonstrated that NdVO4 can be used as a new type of gas-sensing material which has a high sensitivity and good selectivity to Liquefied petroleum gas (LPG).

Complex perovskite microwave dielectric ceramics (MWDCs) of $A\\lpar {B}^{\\prime}_{1/3}{B}^{\\prime \\prime}_{2/3}\\rpar {\\rm O}_3$A(B1/3′B2/3′′)O3-type (A = Ba, Sr,…; B′ = Mg, Zn,…; B″ = Nb, Ta), which exhibit excellent dielectric properties, have currently been widely used in microwave and millimetre wave devices. Vibrational spectra, including both Raman and far-infrared (FIR) spectra, are powerful tools to investigate the atomic thermal vibrational properties of MWDCs and reveal the intrinsic origin of dielectric properties. In this review, lattice dynamics and phonon characteristics of the $A\\lpar {B}^{\\prime}_{1/3}{B}^{\\prime \\prime}_{2/3}\\rpar {\\rm O}_3$A(B1/3′B2/3′′)O3-type MWDCs are summarised and presented in detail to introduce remarkable progress in this field and make a guide for the design of novel advanced MWDCs. The atomic sites and the corresponding modes in Raman and FIR spectra are identified and illuminated. The effects of the processing conditions and the ordered superstructures in the nanoscale region on vibrational modes are summarised systemically. Intrinsic properties can be extrapolated from the fitting results of FIR spectroscopy, which were also discussed based on the Kramers–Krönig relations, Lorentz three-parameter classical model and four-parameter semi-quantum model. The correlations between vibrational modes (phonons), crystal structures, and dielectric properties are created, which can help to build the mathematical models so as to understand the structure–property relationship of MWDCs better.

Single crystals of NdVO 4 were grown by the Czochralski method under ambient pressure in a nitrogen atmosphere. Obtained crystals were transparent with strong violet coloring. Temperature and angular dependences of electron paramagnetic resonance (EPR) spectra of the samples in the 3–103 K temperature range were analyzed applying Dyson like lineshape typically used for concentrated magnetic system. EPR-NMR program was used to find local symmetry and spin-Hamiltonian parameters of neodymium ions.