Aminotetrazole-Functionalized SiO₂ Coated MgO Nanoparticle Composites for Removal of Acid Fuchsin Dye and Detection of Heavy Metal Ions

Abstract

Stepwise synthesis of aminotetrazole functionalized MgO–SiO2 (MSNT) nanocomposites has been achieved by a simple wet chemical method. The as-synthesized nanomaterial is investigated for the removal of dye and the detection of heavy metal ions from the aqueous solutions. The structural, textural, and morphological characteristics of the nanocomposites are characterized by P-XRD, FT-IR, solid-state NMR, TGA, BET N2 isotherm, FE-SEM, and TEM techniques. The dye adsorption studies reveal that the material selectively and rapidly adsorbs the acid fuchsin (AF) dye (78% color removal within 2 min) with high adsorption capacity (775.6 mg/g) and good recyclability. The adsorption isotherm and kinetic studies indicate that the dye adsorption takes place by the Freundlich isotherm and pseudo-second-order kinetic model. The material has been used to modify the glassy carbon electrode (GCE) for the detection of Pb­(II) and Hg­(II) ions by square wave anodic stripping voltammetry (SWASV), which shows excellent sensitivity (≈75 μA·μM–1·cm–2 and 40 μA·μM–1·cm–2) and low detection limit (0.019 μM and 0.041 μM) for Pb­(II) and Hg­(II) ions, respectively. The practical applicability of the material for heavy metal ion detection has also been ascertained by stability, reproducibility, interference, simultaneous detection, and real-time sample studies.

Probing the effect of Ni, Co and Fe doping concentrations on the antibacterial behaviors of MgO nanoparticles

“…The size and morphology of metal oxide nanoparticles can be modified using parameters such as ionic strength, pH, different calcination temperatures, reaction temperature, and time. MgO nanoparticles can be synthesized via different techniques such as sol–gel 2 , 3 , hydrothermal reaction 4 , 5 , direct chemical transformation 6 , laser ablation 7 , aerogel 8 , microwave radiation 9 , solid-state interfacial diffusion–reaction 10 , vapor–solid process 11 , physicochemical technique 12 , chemical vapor synthesis 13 , and chemical precipitation method 14 , 15 , etc. Among the different synthesis methods, the sol–gel routes are a powerful, fast and economical technique for the synthesis of MgO metal oxide nanoparticles, as well as, it provides high purity homogenous materials.…”

ZnFe2O4 Nanoparticles for Electrochemical Determination of Trace Hg(II), Pb(II), Cu(II), and Glucose

“…Heavy metal ions (HMIs), such as Hg­(II), Pb­(II), and Cu­(II) in aqueous environments, have caused many diseases and posed a serious threat to ecosystems and common health with the rapid advancement of industry in recent years. − Therefore, it is of great significance to detect HMIs for environmental monitoring and human health guarding. However, it is difficult and challenging to simultaneously detect multiple HMIs because of the mutual interference between HMIs . Differential pulse anodic stripping voltammetry (DPASV), as one of the effective electrochemical simultaneous detection strategies, has been of wide concern in the field of multiple HMIs and nonenzyme glucose sensors because of its simple operation, quick response, low detection limit, high sensitivity, and good selectivity. − The DPASV technique significantly depends on the modified electrode materials since it can tremendously improve the preconcentration efficiency of target HMIs and the electrocatalytic oxidation process. , Therefore, the reasonable design and optimization of modified electrode materials play a significant role in improving the performance of multiple HMI and glucose electrochemical sensors.…”

A Turn-ON fluorometric biosensor based on ssDNA immobilized with a metal phenolic nanomaterial for the sequential detection of Pb(ii) and epirubicin cancer drug

“…Upconverting nanoparticles (UCNPs), silicon nanocomposites (SiNCs), graphene-like 2D materials, graphene oxide (GO), transition metal dichalcogenides (TMD), graphitic carbon nitride, and transition metal oxides (TMOs) [15][16][17][18][19][20][21] have attracted great attention as transduction elements and supporting substrates in a wide variety of biosensing technologies. 2D materials can provide an extremely high density of active surface sites over a large surface area, making them ideal for biochemical sensing.…”