A controlled and up-scalable biosynthetic route to nanocrystalline silver particles with well-defined morphology using cell-free aqueous filtrate of a non-pathogenic commercially viable biocontrol agent Trichoderma asperellum is being reported for the first time. transparent solution containing 1 mM AgNO3 turns progressively dark brown within 5 d incubation at 25 °C. The kinetics reaction was studied UV–vis spectroscopy. An intense surface plasmon resonance band ∼410 nm in spectrum clearly...

We report the synthesis of undoped and Sc3+-doped BiFeO3 nanoparticles using sonochemical technique. X-ray diffraction reveals that all samples are single phase with no impurities detected. EDX analysis was done to confirm extent Sc3+ doping in samples. The size morphology have been analyzed transmission electron microscopy (TEM). XPS studies were check presence Fe2+ ions show a weak ferromagnetic behavior at room temperature, which is quite different from linear M–H relationship reported...

In this study we report the synthesis of BiFeO(3) nanorods using a sonochemical technique. The had diameter 20-50 nm, length 100-500 nm and exhibit aspect ratios in range 5-10. However, after doping, TEM images Bi(0.9)Ba(0.1)Fe(0.9)Mn(0.1)O(3) Bi(0.9)Ca(0.1)Fe(0.9)Cr(0.1)O(3) samples show that both double doped have reduced considerably, while retaining crystallinity particles. weak ferromagnetic order at room temperature, which is quite different from linear M-H relationship reported for...

Abstract We report here two different simple, one‐pot, and low cost chemical synthetic routes for the preparation of Cu 2 O nanocrystals: (a) thermal decomposition copper–organic precursors copper(II) acetate or acetylacetonate in long chain organic solvents oleyl alcohol trioctylamine, respectively, at 170 °C (b) a surfactant‐free solvothermal approach involving reaction acetone 140 °C. The structure morphology nanocrystals have been characterized detail by XRD, FTIR spectroscopy, Raman...

Undoped Bi(2)O(3) and single double doped : M (where = Tb(3+) Eu(3+)) nanophosphors were synthesized through a simple sonochemical process characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission (TEM), high resolution (HRTEM), EDS, diffuse reflectance (DRS) photoluminescence (PL) spectrophotometry. The TEM micrographs show that resultant nanoparticles have rod-like shape. Energy transfer was observed from host to the dopant ions. Characteristic green...

Cu-doped TiO2 photocatalysts [Cu-(1 to 10) atom %] synthesized by the sol–gel method and thoroughly characterized using several techniques were evaluated for photocatalytic reduction of CO2 under ambient conditions. These converted reactant mixture moisture selectively into methane oxygen visible irradiation without use any sacrificial agent. The Cu dopant considerably lowered bandgap TiO2, thereby making it feasible doped absorb light in region. Beyond 1% doping materials far superior as...

Generation of hydrogen is one the most promising routes to harvest solar energy for its sustainable utilization. Among different routes, photoelectrochemical (PEC) process split water using light produce green method generate hydrogen. The sluggish kinetics through complicated pathways makes oxygen evolution reaction rate limiting step overall splitting process. Therefore, development an efficient photoanode oxidation challenging in PEC low conversion efficiency arises from slow surface...

Gadolinium oxide host and europium/dysprosium/terbium doped gadolinium nanoparticles were synthesized using the sonochemical technique. nanocrystals also co-doped with total 2 mol% of Eu(3+)/Dy(3+),Eu(3+)/Tb(3+),Dy(3+)/Tb(3+), Eu(3+)/Dy(3+)/Tb(3+) ions, by same method. The obtained characterized powder x-ray diffraction (XRD), transmission electron microscopy (TEM), selected area (SAED) techniques. size particles ranged from 15 to 30 nm. triple samples showed multicolor emission on single...

We report results of a comprehensive study the phase transition at TN (∼643K) as function particle size in multiferroic BiFeO3 system. employed electrical, thermal, and temperature dependent x-ray diffraction studies order to characterize host samples. also carried out detailed magnetic measurements over regime 2–300K under field 100–10000Oe both on bulk nanocrystalline systems. While system sharp endothermic peak together with broad feature, ranging nearly ∼100K (ΔT), could be observed...

We report the preparation, characterization, and magnetic properties of highly crystalline colloidal Fe-doped indium oxide nanoparticles. The nanoparticles have been prepared in high yields by simple one-pot thermal decomposition iron precursors hexadecylamine can be easily dispersed solvents like chloroform toluene. Detailed X-ray diffraction, microstructure, Raman studies reveal that are single phase cubic bixbyite structure without any parasitic secondary phases. DC magnetization as a...

Single phasic anatase titania with up to 10 mol % vanadium doping, having a particle size of about 12 nm, was synthesized by sol−gel route and its photocatalytic behavior evaluated for the photo-oxidation ethene using sunlight-type excitation. Incorporation vanadia in lattice established techniques like XRD, XPS, surface area analysis, TEM, DR-UV−visible spectroscopy, Raman FTIR. Vanadium doping led red shift UV−visible absorbance spectra compared pristine titania, thus enhancing absorption...

Flexible and self-standing inorganic-organic hybrid films of silica coated Fe3O4 nanoparticles polyvinylidene fluoride (PVDF) polymer with significant magneto-dielectric coupling have been prepared at low temperature by a simple solvent casting method. PVDF two different concentrations (4.76 9.09 wt%) developed well characterized using techniques like XRD, TEM IR. The thin film coating on could be detected IR TEM. ferroelectric, magnetic magneto-capacitive measurements room confirm the...

The present work involves the synthesis of a series Sm2−xDyxZr2O7 compounds (0.0 ≤ x 2.0) by controlled gel combustion process. powders were thoroughly analyzed powder X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy, and diffuse-reflectance UV−visible spectroscopy. XRD studies revealed system to be single-phasic throughout with retention pyrochlore-type ordering until 40 mol % Dy3+, beyond which pyrochlore lattice gives way defect fluorite structure. Interestingly,...

The preparation, characterization, and magnetic properties of dispersible Co- Ni-doped ZnO nanocrystals (NC) are reported. nanocrystals, Zn1−xTMxO where x = 0−0.07 for TM Co 0.02, 0.03 Ni have been synthesized by nonhydrolytic alcoholysis esterification elimination reaction using anhydrous metal carboxylates as precursors in the presence oleic acid oleyl alcohol at temperatures low 220 °C. prepared can be easily dispersed solvents like chloroform toluene. Detailed X-ray diffraction (XRD)...

Room temperature angle-dispersive x-ray diffraction measurements on zircon-type ${\text{EuVO}}_{4}$, ${\text{LuVO}}_{4}$, and ${\text{ScVO}}_{4}$ were performed up to 27 GPa. In all the three compounds we found evidence of a pressure-induced structural phase transformation from zircon scheelite-type structure. The onset transition is near 8 GPa, but sluggish low-pressure high-pressure phases coexist in pressure range about 10 ${\text{EuVO}}_{4}$ ${\text{LuVO}}_{4}$ second...

We report an extraordinary coexistence of sign reversal both magnetization and exchange bias field in the La0.2Ce0.8CrO3 nanoparticles. From high resolution transmission electron microscopy image, dependence thermoremanent isothermoremanent measurements, nanoparticles are found to be core-shell nature. The configuration with antiferromagnetic core Cr3+ Ce3+ spins a disordered shell uncompensated spins, explains field. present study shows excellent way tuning single magnetic system.

Novel single, double and triple doped ZnAl2O4:M ZnGa2O4:M (where M = Dy3+, Tb3+, Eu3+ Mn2+) nanophosphors were synthesized through a simple sonochemical process characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM) photoluminescence (PL) spectrophotometry. The results of XRD TEM show that resultant nanoparticles are single phase have spherical shape. samples showed multicolor emission on wavelength excitation. Energy transfer was observed from host to the...