A novel electrochemical kidney injury molecule-1 (KIM-1) immunosensor based covalent organic frameworks-gold nanoparticles composite and porous NiCo2S4@CeO2 microspheres: The monitoring of acute kidney injury

http://openaccess.hku.edu.tr/xmlui/bitstream/20.500.11782/2613/1/WOS000809661700006.pdf

Construction of carbon dots modified hollow g-C3N4 spheres via in situ calcination of cyanamide and glucose for highly enhanced visible light photocatalytic hydrogen evolution

In recent times, metal tungstates have received a lot of attention in various research fields. Accordingly, the CaWO4/RGO (CW/RGO) nanocomposite was prepared by a facile hydrothermal method. The electrocatalytic performance of the hydrothermally prepared CW/RGO nanocomposite was used for the electrochemical detection of the antibiotic medicine enrofloxacin (ENF). The electrocatalytic oxidation performance of ENF was examined by cyclic voltammetry (CV) and amperometry (AMP) techniques. The CV results showed the lowest anodic peak potential and the enhanced anodic peak current response compared to the other modified electrodes. Mainly, our newly proposed sensor exhibited excellent electrochemical performance with the lowest limit of detection (LOD) of 0.021 μM, and a significant linear range of 0.001-115 μM. Additionally, our proposed sensor exhibited good selectivity, great long-term stability, and excellent reproducibility. Then, our proposed sensor was successfully applied to detect the amount of ENF in a milk sample and river water, which exhibited good satisfactory results.

A novel electrochemical sensor for the detection of enrofloxacin based on a 3D flower-like metal tungstate-incorporated reduced graphene oxide nanocomposite.

The reaction of Si2Cl6 and HCl to form SiHCl3 and SiCl4 catalyzed with aliphatic and aromatic amines was explored in detail by density functional theory calculations. All stagnation points included...

Theoretical study on the reaction mechanism of Si2Cl6 and HCl catalyzed by amine catalysts

CO2 capture and separation with metalloporphyrin nanosheets in an electric field: A DFT study

Ag Quantum Dots Decorated Ultrathin G-C 3N 4 Nanosheets for Boosting Degradation of Pharmaceutical Contaminants and Antibiosis: Insight from Interfacial Electric Field Induced by Local Surface Plasma Resonance

Background Cu(II) is considered to be a heavy metal ion that is quite hazardous to water. Aims Zinc oxide-montmorillonite composite (ZnO-Mt) for the removal of Cu(II) from aqueous solutions. Materials & Methods ZnO-Mt was prepared through ion exchange followed by heat treatment to form a highly effective adsorbent. Results The structure and morphology of the composite were investigated by X-ray diffraction, scanning electron microscope, and fourier transform infrared spectroscopy and it was found that Zinc oxide was successfully coated on montmorillonite. The composite has a superior removal effect on Cu(II) in an aqueous solution with an adsorption capacity of 192.89 mg·g−1. The adsorption kinetic model and the adsorption isotherm model are described by the pseudo-second-order kinetic equation and the Langmuir equation, respectively. The activation energy (Ea) was 84.18 kJ·mol−1, indicating that the adsorption was dominated by chemisorption. In addition, ZnO-Mt can be applied in a wide pH range (3 ~ 8) and exhibits satisfactory selectivity for the adsorption of Cu(II) in the presence of coexisting cations. The removal efficiency of ZnO-Mt for Cu(II) remains at 72% of the fresh adsorbent after five cycles. Discussion A combination of experiment, characterization, and density functional theory analysis showed that the mechanism of Cu(II) removal was mainly surface complexation, ion exchange, and electrostatic attraction. Conclusion Therefore, the ZnO-Mt composite is a promising and efficient adsorbent for the removal of Cu(II) from aqueous solutions. 

Removal of Cu(
 II
 ) from aqueous solutions by zinc oxide‐montmorillonite composite

The development of non-noble metal catalysts is crucial for hydrogen production. In this study, electrochemically reconfigurable Fe2O3@NiO-x composite catalysts were synthesized within tens of seconds using a simple microwave deposition method. Interestingly, Fe2O3@NiO-5 exhibited a high-speed and deep surface reconstruction capability, greatly enhancing the hydrogen evolution reaction (HER) activity. DFT calculations also confirmed that the reconstruction process optimized the adsorption energy of H2O and H intermediate to promote HER kinetics. The optimized Fe2O3@NiO-5 electrode only afforded an overpotential of 295 mV at 10 mA cm−2 and it steadily functioned for 25 h for HER in 1 M KOH. In addition, benefiting from the combination of Fe2O3 and NiO layer during the synthesis process, Fe2O3 and NiO converted into FeOOH and NiOOH, respectively, resulted in the excellent oxygen evolution reaction (OER) activity of Fe2O3@NiO-5. The as-prepared Fe2O3@NiO-5 only required an overpotential of 186 mV at 10 mA cm−2 and exhibited excellent stability for up to 144 h. As a bifunctional catalyst, the Fe2O3@NiO-5 electrode can deliver a current density of 20 mA cm−2 at a low voltage of 1.78 V with high durability for water splitting. This work can provide a new perspective for constructing advanced non-noble metal electrode. 

Danqi Wang

Papers

Theoretical study on the reaction mechanism of Si2Cl6 and HCl catalyzed by amine catalysts

CO2 capture and separation with metalloporphyrin nanosheets in an electric field: A DFT study

Ag Quantum Dots Decorated Ultrathin G-C 3N 4 Nanosheets for Boosting Degradation of Pharmaceutical Contaminants and Antibiosis: Insight from Interfacial Electric Field Induced by Local Surface Plasma Resonance

Removal of Cu( II ) from aqueous solutions by zinc oxide‐montmorillonite composite

Non‐noble metal Fe 2 O 3 @NiO as efficient bifunctional catalysts for water splitting