Mixture of carbon aerogel with Pd-WO3 nanorods for amperometric determination of mesalazine

We prepared, for the first time, carbon aerogels support on Pd-WO₃ nanorods (CAs/Pd-WO₃) hybrid nanocomposite via sol-gel and microwave-assisted methods. The as-prepared CAs/Pd-WO₃-modified electrode was used as effective electrocatalyst for nanomolar level detection of mesalazine (MSA). The typical porous nature of carbon aerogels effectively prevented the aggregation of Pd-doped WO₃ nanorods and increased the electrochemically active surface area. In addition, the Pd-WO₃ nanointerface provides intrinsic improvement of the electrocatalytic activity and stability for the electrochemical oxidation process, and the interconnected conducting network of the porous surfaces of CAs accelerated rapid electron transport at the working electrode. The synergistic effect of the CAs/Pd-WO₃ architecture has excellent electrocatalytic activity for the detection of MSA with high sensitivity of 2.403 ± 0.004 μA μM^-1 cm^-2, low detection limit of 0.8 ± 0.3 nM and wide linear response from 0.003-350 μM at a low applied potential of 0.30 V vs. Ag|AgCl. Satisfactory results were observed for its analytical performance in detecting MSA in human blood serum and urine samples, and recoveries ranged from 98.8 to 100.4%. We believe that the architecture of the modified CAs/Pd-WO₃ electrocatalysts can be effectively used in clinical applications for the detection of MSA.

Application of quercetin flavonoid based hybrid nanocomposites: A review

Natural bioflavonoids are an essential component of dietary supplements possessing antimicrobial properties. Many of the bioflavonoids have resulted in positive antitumor, anticancer, antibacterial, antifungal, anti-inflammatory properties, but the efficacy remains low due to toxicity at the molecular level whereas antiviral property limits to negative. The synergistic link between nanoscience and flavonoid chemistry enhances the epidemiological properties of flavonoid and also diminish the antimicrobial resistivity (AMR) by forming their hybrid nanocomposites. Nanochemistry uses various nanocomposite and nanomaterials for biosensing the flavonoids and their delivery as a drug. The quercetin flavonoid and its derivatives such as rutin, and myricetin are used for sensing and drug delivery. Quercetin with 15Carbon-5Hydroxyl chemical scaffold has been explored for a few decades for the development of hybrid nanocomposite and nanomaterial with metallic as well as organic nano co-composites. This quercetin flavonoid based hybrid nanocomposites seemed to show a significant effect on In vitro and some animal model processes along with attenuating lipid peroxidation, platelet aggregation, and capillary permeability actions. This review mainly focused on the hybrid nanoscience of quercetin bioflavonoid and its application in numerous biological, material fields with a future perspective.