Publications

An Fe–TiO 2 nanoribbon array supported on a Ti plate is a high-efficiency catalyst for electrocatalytic NO 3 − -to-NH 3 conversion, capable of achieving a large NH 3 yield of up to 940.17 μmol h −1 cm −2 and a high faradaic efficiency of 95.93%.

Herein, measurements of the cloud point (CP) of Triton X-100 (TX-100)/TX-100 + polyethylene glycol-400 (PEG-400) systems were carried out in aqueous/additive solutions. For the clouding process of TX-100 in H2O, the CP values were observed to be reduced first by means of enhancing the TX-100 content up to a fixed level and then increased with increasing content. The CP values of TX-100 were observed to be increased in the presence of PEG-400 and the CP values were further enhanced with enhancing content of PEG-400 in the aqueous medium. In the case of the aqueous solution of alcohol, the CP values of TX-100 solution in the presence and absence of PEG-400 were almost reduced with increasing chain length of alcohols used. For TX-100 + PEG-400 mixed systems, the observed CP values were found to be reduced to a small extent with increasing content of polyols (glucose, galactose, and maltose) and follow the following order: glucose ≈ galactose > maltose. The CP values of TX-100 + PEG-400 mixed systems were observed to be reduced with enhancing contents of diols used. The impact of various diols on increasing CP values of the TX-100 + PEG-400 system was observed in the subsequent trend: 1,2-propanediol > 1,2-ethanediol. The clouding phenomena of the TX-100 + PEG-400 system were observed to be delayed with enhancing the extent of urea.

Synthesis of Y(III) phosphate-functionalized polyaniline nanocomposite ([email protected](III)PO4) was achieved through sol–gel method. The synthesized [email protected](III)PO4 was characterized by various techniques including Fourier-transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FE-SEM), Energy dispersive X-ray spectroscopy (EDX), X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), Thermogravimetric analysis (TGA)-Differential thermal analysis (TGA-DTA) and direct current (DC) electrical conductivity. Efficient employment for the nanocomposite as modifier glassy carbon electrode was characterized by electrochemical impedance spectroscopy (EIS) and cyclicvoltametry (CV). The modified electrode showed a powerful enhancing effect and great stability in electrochemical sensing of the heavy metal ion Pb(II), giving an anodic peak current with a formal potential of - 0.195 V in acetic solution. The electrochemical parameters of the proposed sensor such as exchange current density (ⅉ0), active surface area of [email protected](III)PO4 modified GCE (A), surface coverage (Γ) of Pb (II) on the surface of [email protected](III)PO4, transfer coefficient (α) and number of electrons (n) involved in the electro-reduction, were found to be 92.21 μA cm-2, 0.27 cm2, 3.24×10-7 mol cm-2, 0.26 and 1.6 ≈ 2, respectively. Two voltametric techniques namely CV and linear sweep voltammetry (LSV) studies exhibited that the anodic peak current was linearly dependent on the concentration of Pb(II) with a broad dynamic range of 2.85–199.92 μM and 2.85–62.85 μM, respectively. However, the LSV method showed the highest sensitivity (5.58 μA μM-1 Cm-2) and the lowest detection limit (0.04 μM).

The synthesis of a series of 2,3-diaryl-7-methyl-4,5,6,7-tetrahydroindazole and 3,3a,4,5,6,7-hexahydroindazole derivatives substituted with various biologically-active function groups with anticipated chemotherapeutic activity is described. 4-(7-methyl-3-aryl-3,3a,4,5,6,7-hexahydro-indazol-2-yl)benzenesulfonamides 2a-c, which were employed as key intermediates in this study, were synthesized by cyclocondensation of 6-arylidene-2-methylcyclohexanones 1a-c with 4-hydrazinobenzenesulfonamide hydrochloride. A detailed discussion of the reactions utilized in the preparation of the intermediate and target compounds is reported, and the structures of the newly synthesized compounds were substantiated with IR, (1)H and (13)C NMR spectral data and elementary microanalyses. Twenty of the newly synthesized compounds were selected by National Cancer Institute (NCI), Maryland, USA, to be evaluated for their antitumor activity and the results revealed that six compounds 3c, 4d,e, 5a,d and 8c exhibited broad spectrum of antitumor activity against most of the tested tumor cell lines. In addition, the in vitro antibacterial and antifungal activities of a number of the target compounds were also tested using the Agar-diffusion method. Some of these compounds have shown significant antibacterial and mild to moderate antifungal activities.

It is of great importance to design and develop highly active and selective electrocatalysts for the CO₂ reduction reaction (CO₂RR). In this communication, we report an iodide-derived nanostructured silver catalyst (ID-Ag) as an excellent CO₂RR catalyst that is able to electrochemically reduce CO₂ to CO with approximately 94.5% selectivity at the potential of -0.7 V in CO₂-saturated 0.5 M KHCO₃. This suggests that the highly electrochemical active surface area and adsorbed I^- anions onto the surfaces of the electrode contribute to the enhanced activity and selectivity of the nanostructured Ag electrocatalyst toward CO₂ reduction.

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.