Chromium vanadate nanoparticles entrapped reduced graphene oxide nanosheets: A nanocomposite with high catalytic activity for the detection of hypertension-drug nifedipine in biological samples

Detection of NH3 gas using CrVO4 nanoparticles

“…The bands between 410 cm − 1 and 424 cm − correspond to Cr -O stretching vibrations in CrVO 4 [55,56]. Essential deformation vibrations of the V -O -V bridges can be observed at 450 cm − 1 and 501 cm − 1 , as reported previously [53,57].…”

“…The IR bands between 1050 cm − 1 and 880 cm − 1 can be assigned to the terminal V -O stretching according to reports on isostructural polymorphs by Yusuf et al [52]. The band at 721 cm − 1 represents mixed bridging stretching of V -O -Cr, while the bands at 862 cm − 1 and 923 cm − 1 can be attributed to V -O asymmetric and symmetric stretching vibrations, respectively [53,54]. The bands between 410 cm − 1 and 424 cm − correspond to Cr -O stretching vibrations in CrVO 4 [55,56].…”

Conductive phthalocyanine-based porous organic polymer as sensing platform for rapid determination of vanillin

“…The strongest signal recorded at pH 5.0 is attributed to the maximal deprotonation occurring at this pH level. 49 Therefore, pH 5.0 was chosen for the subsequent quantitative analysis. As the pH of the solution increased, the oxidation peak progressively shifted in the negative direction, suggesting the involvement of protons in the oxidation process.…”

Electrochemical Sensing Platform Based on the Modification of Carbon-Ceramic Electrode with Bimetallic Fe/Mn-MOF Applied in the Determination of Nifedipine in Human Serum Samples

“…1,2 nifedipine (1,4-dihydro-2,6-dimethyl-4-(2nitrophenyl)-3,5-pyridine dicarboxylic acid dimethyl ester) is one of the most used and prescribed drugs for the management and treatment of hypertension in various medical conditions. 3,4 It is a calcium channel blocker drug that is effectively and widely used for the treatment of cardiovascular diseases such as hypertension and angina. 5 In the human body, nifedipine is mainly converted to the derivative state of nitropyridine, and its normal dosage for treatment is 30 mg. 6 However, nifedipine is poisonous in excess concentration and may have unpleasant moderate to severe consequences.…”