Enhanced photo-fenton and photoelectrochemical activities in nitrogen doped brownmillerite KBiFeO.

Visible-light-driven photo-fenton-like catalytic activity and photoelectrochemical (PEC) performance of nitrogen-doped brownmillerite KBiFeO (KBFO) are investigated. The effective optical bandgap of KBFO reduces from 1.67 to 1.

g-CN/CaFeO heterostructures for enhanced photocatalytic degradation of organic effluents under sunlight.

g-CN/CaFeO heterostructures were successfully prepared by incorporating g-CN into CaFeO (CFO). As prepared g-CN/CFO heterostructures were initially utilized to photodegrade organic effluent Methylene blue (MB) for optimization of photodegradation performance. 50% g-CN content in CFO composition showed an enhanced photodegradation efficiency (~ 96%) over g-CN (48.

Bifunctional investigation of ultra-small SnO nanoparticle decorated rGO for ozone sensing and supercapacitor applications.

Ultrasmall SnO nanoparticles with an average size of 7 nm were synthesized by a hydrothermal method and composited with reduced graphene oxide (rGO) through an ultrasonic assisted solution process. The structural, functional, morphological and compositional properties of synthesised SnO and rGO/SnO were studied by XRD, FTIR, HRSEM, HRTEM, XPS and Raman analyses. The prepared materials were developed as a film over a PVA/KOH conductive layer coated substrate with varying thickness of 3, 5 and 7 μm to study their ozone sensing characteristics at room temperature.

Nitrogen Incorporated Photoactive Brownmillerite CaFeO for Energy and Environmental Applications.

CaFeO (CFO) is a potentially viable material for alternate energy applications. Incorporation of nitrogen in CaFeO (CFO-N) lattice modifies the optical and electronic properties to its advantage. Here, the electronic band structures of CFO and CFO-N were probed using Ultraviolet photoelectron spectroscopy (UPS) and UV-Visible spectroscopy.

Improved performance of dye-sensitized solar cells upon sintering of a PEDOT cathode at various temperatures.

Poly(3,4-ethylenedioxythiophene) (PEDOT) thin films have attracted considerable attention as cathodes for dye-sensitized solar cells (DSSCs) due to their air-stable, light-weight and conductive nature. To demonstrate their thermal stability as cathodes, PEDOT thin films coated electrochemical polymerization on fluorine doped tin oxide (FTO) plates were sintered at different temperatures (50, 100, 150, 200, and 300 °C) for 1 h and a comparison was made with the as-prepared PEDOT thin films. We observed a negative temperature coefficient effect up to 200 °C along with lower surface roughness upon increasing the sintering temperature.

Investigations on the performance of poly(o-anisidine)/graphene nanocomposites for the electrochemical detection of NADH.

The electrocatalytic oxidation of dihydronicotinamide adenine dinucleotide (NADH) based on poly(o-anisidine)/graphene (POA/GR) nanocomposites modified glassy carbon electrode (GCE) was explored for the first time. POA/GR nanocomposites were synthesized via chemical oxidative polymerization method. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and UV-Vis spectroscopy results demonstrate that nanocomposites are successfully synthesized.

Spray deposition and characterization of nanostructured Li doped NiO thin films for application in dye-sensitized solar cells.

Transparent conducting Li (0-5 wt%) doped NiO thin films with preferential growth along the (111) plane were deposited onto glass substrates by pyrolytic decomposition of nickel nitrate and lithium chloride precursors at 500 °C in air. The effect of Li concentration on the structural, optical and transport properties of NiO thin films was studied by x-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), spectral transmittance, photoluminescence and linear four-probe resistivity. Activation energies as a function of Li concentration were deduced from the temperature dependent resistivity data measured in the range 300-448 K.