A new, easy and green method is utilized for producing silver decorated graphene for its application in sensors and supercapacitors. The biomass-derived silver decorated graphene (AgGr) samples are prepared using an APCVD reactor with varying the process temperature from 600 to 800 °C. The as-synthesized AgGr samples were then characterized by AFM, SEM, Raman spectroscopy, FTIR spectroscopy, XRD, cyclic voltammetry and impedance spectroscopy. The interlayer spacing and I_D/I_G ratio of the AgGr samples varied from 3.6 to 3.7 Å and 0.87 to 1.52, respectively, as the process temperature was raised from 600 to 800 °C. The SEM image shows the distribution of the flower-like structure of Ag flakes in the graphene sheet for the AgGr-800 sample. Also, the greater number of active sites on the surface of AgGr-800 and the presence of a higher number of defects makes it least useful for p-nitrophenol sensing due to the excess opening of the CV curve but has a maximum capacitance of 93.5 Fg⁻¹ in 1 M H₂SO₄. AgGr-600 showed extremely good sensing of p-nitrophenol than the other AgGr samples. Therefore this novel technique can be utilized for the large scale manufacture of various metal decorated graphene samples for their application in different fields.

Glasses having the stoichiometry ratio [(70-x) B₂O₃–10Na₂O–20ZnO–xNiO] where 0.0 ≤ x < 0.3 mol% were synthesized using a melt quenching technique. The X-ray diffraction (XRD) technique confirmed the non-crystalline properties of the glasses. Surface morphology and elemental analysis were done by scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) spectra. The glass density ranged from 2.539 to 2.597 gcm⁻³ and the physical characteristics such as ion concentration, inter-ionic distance, average boron-boron distance, oxygen packing density, polaron radius, and field strength were calculated and interpreted. The deconvolution spectra of Fourier Transfer Infra-Red (FTIR) and Raman spectroscopy resulted in BO₃ unit to BO₄ unit conversion as the NiO concentration increased. The UV–Visible spectroscopy showed absorption peaks near 425 nm and 800 nm corresponding to ³A_2g (F) → ³T_1g (P)) and (³A_2g (F) → ¹E_g(³F)) transitions respectively. The direct bandgap decreased from 4.00 to 3.76 eV, but the indirect bandgap increased from 3.00 to 3.12 eV. The Urbach energy of glasses decreased from 0.56 to 0.35 with an increase in NiO concentration showing the compactness of the glass network. Furthermore, optical characteristics were determined, including the refractive index, dielectric constant, metallization criterion, electronic oxide ion polarizability, optical basicity, and numerical aperture. Photoluminescence spectra exhibit strong green and cyan emission due to d-d transitions of Ni²⁺. The CIE Chromaticity coordinates confirm that the observed green light emission from BZNNi glasses are suitable candidates for optoelectronic applications.