Publications

Herein, we have examined the interaction between promazine hydrochloride (PMZ) with bile salts (sodium cholate (NaC) and sodium deoxycholate (NaDC)) at different temperatures and compositions using conductometric method. The critical micelle concentration (cmc) value of pure PMZ and bile salts were also evaluated by tensiometric method. The cmc values attained by the two methods are close to each other. Various physicochemical parameters like cmc, ideal cmc (cmcid), degree of dissociation of counterion (g), micellar mole fractions of bile salt (, , ), micellar mole fraction of bile salt in ideal state (), interaction parameter (βm), activity coefficients (f1, f2), standard Gibbs free energy (), enthalpy (), entropy of micellization (), and excess free energy of mixing (ΔGex) of the mixed micelles have been evaluated and discussed in detail using Clint's, Rubingh's, Motomura's, and Rodenas's models. NaDC is more efficient in decreasing the cmc of PMZ as compared to NaC because it binds strongly to PMZ ions and more decreases the head group area of drug. On the whole, this lesson might find application in the fundamental science of the physical chemistry of amphiphilic systems, as well as in the research of drug delivery system.

In this work, we develop a novel environmentally friendly strategy toward one-pot synthesis of CuS nanoparticle-decorated reduced graphene oxide (CuS/rGO) nanocomposites with the use of L-cysteine, an amino acid, as a reducing agent, sulfur donor, and linker to anchor CuS nanoparticles onto the surface of rGO sheets. Upon visible light illumination (λ > 400 nm), the CuS/rGO nanocomposites show pronounced enhanced photocurrent response and improved photocatalytic activity in the degradation of methylene blue (MB) compared to pure CuS. This could be attributed to the efficient charge transport of rGO sheets and hence reduced recombination rate of excited carriers.

Abstract Industrial NH 3 synthesis mainly relies on the carbon‐emitting Haber–Bosch process operating under severe conditions. Electrocatalytic N 2 to NH 3 fixation at ambient conditions is an attractive approach to reduce energy consumption and avoid direct carbon emission. In this communication, it is reported that the S‐doped carbon nanosphere (S‐CNS) acts as an efficient and stable nitrogen reduction reaction (NRR) catalyst for ambient N 2 to NH 3 conversion with excellent selectivity. In 0.1 m Na 2 SO 4 , the S‐CNS achieves a large NH 3 yield of 19.07 μg h −1 mg −1 cat. and a high Faradic efficiency of 7.47% at –0.7 V versus reversible hydrogen electrode, much higher than those of undoped CNS (3.70 μg h −1 mg −1 cat. , 1.45%). Notably, this catalyst also demonstrates high electrochemical and structure stability.

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.

In this communication, we demonstrate the rapid large-scale preparation of holey graphene nanosheets (h-G NSs) via low-temperature thermal treatment of oxidized graphite powder obtained by a modified Brodie method in air. The h-G NSs have nanopores with a high specific surface area and large pore volume. When used as a water cleaning agent, they exhibit excellent absorption performances for oils, solvents and dyes.

[This retracts the article DOI: 10.7759/cureus.38147.].

Surface introduction of an amorphous borate shell on NiCo₂O₄ greatly boosts its electrochemical water oxidation activity under alkaline conditions. To achieve 10 mA cm⁻² in 1.0 M KOH, NiCo₂O₄@Ni–Co–B/CC needs an overpotential of only 270 mV.