Publications

The cloud point (CP) of a mixture of Tween 80 (Tw 80) and neomycin sulphate (NS) was measured in an aqueous medium containing electrolyte (NaCl, NaNO3, and Na2SO4). The CP of Tw 80 decreased when Tw 80 concentration increased. For various concentrations of Tw 80 (1.53 × 10–2, 3.05 × 10–2, and 6.11 × 10–2 mol.kg-1), CP values of the solution decreased with increasing additions of NS. CP values of NS+Tw 80 mixtures also decreased upon the addition of salts, following the trend: CPNa2SO4 > CPNaNO3 > CPNaCl. Thermodynamic variables including standard-free energy (∆G0c), standard enthalpy (∆H0c), and standard entropy (∆S0c) of clouding as well as thermodynamic properties of transfer during phase transition were also determined. A linear relationship between enthalpy change (∆H0c) and entropy change (∆S0c) with an R2 value of 0.9997–1.00 was obtained for the Tw 80+ NS mixture in aqueous electrolyte media.

In the title compound, C(12)H(16)N(2)O(6)S, the S atom adopts a distorted tetra-hedral geometry with an O-S-O angle of 119.76 (13)°. The nitro group is twisted by 35.34 (2)° with respect to the aromatic ring; it accepts an N-H⋯O hydrogen bond, resulting in a S(7) motif. In the crystal, N-H⋯O and O-H⋯O hydrogen bonds connect the mol-ecules into an infinite chain along the a axis. The methyl C atoms of the isopropyl group are disordered in a 1:1 ratio.

CuO mesocrystals were synthesized by thermal decomposition of antlerite (Cu 3 (OH) 4 SO 4 ) formed as an intermediate by the reaction between CuSO 4 .5H 2 O and urea under specific experimental conditions. Antlerite possessing spindles of sea urchin‐like morphology was obtained via controlled hydrolysis process using ethylene glycol as a co‐solvent. Antlerite and CuO mesocrystals were characterized by X‐ray diffraction (XRD), fourier transform‐infrared spectrum (FT‐IR), thermo gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and energy dispersive spectroscopy (EDS). A probable mechanism for formation of such morphologies has been proposed. The photocatalytic and optical properties of CuO mesocrystals were also evaluated.

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Searching for inexpensive hydrogen evolution reaction (HER) electrocatalysts with high activity has attracted considerable research interest in the past years. Reported herein is the topotactic fabrication of self-supported Cu3 P nanowire arrays on commercial porous copper foam (Cu3 P NW/CF) from its Cu(OH)2 NW/CF precursor by a low-temperature phosphidation reaction. Remarkably, as an integrated three-dimensional hydrogen-evolving cathode operating in acidic electrolytes, Cu3 P NW/CF maintains its activity for at least 25 hours and exhibits an onset overpotential of 62 mV, a Tafel slope of 67 mV dec(-1) , and a Faradaic efficiency close to 100 %. Catalytic current density can approach 10 mA cm(-2) at an overpotential of 143 mV.

The removal of dyes from industrial effluents is one of the most important industrial processes that is currently on academic demand. In this project, for the first time, <i>Trachycarpus fortunei</i> seeds are used as biosources for the synthesis of activated carbon (AC) using physical as well as acid-base chemical methods. The synthesized AC was initially characterized by different instrumental techniques, such as FTIR, BET isotherm, SEM, EDX and XRD. Then, the prepared activated carbon was used as an economical adsorbent for the removal of xylenol orange and thymol blue from an aqueous solution. Furthermore, the effect of different parameters, i.e., concentration of dye, contact time, pH, adsorbent amount, temperature, adsorbent size and agitation speed, were investigated in batch experiments at room temperature. The analysis of different techniques concluded that the pyrolysis method created a significant change in the chemical composition of the prepared AC and the acid-treated AC offered a high carbon/oxygen composite, which is graphitic in nature. The removal of both dyes (xylenol orange and thymol blue) was increased with the increase in the dye's initial concentration. Isothermal data suggested that the adsorption of both dyes follows the Langmuir model compared to the Freundlich model. The equilibrium time for AC biomass to achieve the removal of xylenol orange and thymol blue dyes was determined to be 60 min, and the kinetic data suggested that the adsorption of both dyes obeyed the pseudo-second order model. The optimal pH for thymol blue adsorption was pH 6, while it was pH 2 for xylenol orange. The adsorption of both dyes increased with the increase in the temperature. The influence of the adsorbent amount indicated that the adsorption capacity (mg/g) of both dyes reduced with the rise in the adsorbent amount. Thus, the current study suggests that AC prepared by an acid treatment from <i>Trachycarpus fortunei</i> seeds is a good, alternative, cost effective, and eco-friendly adsorbent for the effective removal of dyes from polluted water.