In situ synthesis of label-free electrochemical aptasensor-based sandwich-like AuNPs/PPy/Ti3C2Tx for ultrasensitive detection of lead ions as hazardous pollutants in environmental fluids

Synthesis and Sorption Profiles of Graphene‐Decorated Silane‐Modified Layered Clays for As(V) Removal: A Quantitative Assessment and Mechanistic Insights

“…Water pollution by heavy metals due to rapid industrialization and urbanization is cited as one of the major threats faced by humanity. [1,2] As(V), a ubiquitous metalloid is considered the most notoriously toxic element among various water contaminants. The main sources of arsenic contamination are related to natural environmental processes including mineral weathering, leaching, volcanic eruption and biological activities.…”

“…Water pollution by heavy metals due to rapid industrialization and urbanization is cited as one of the major threats faced by humanity [1,2] . As(V), a ubiquitous metalloid is considered the most notoriously toxic element among various water contaminants.…”

Calcination-Induced Transformation of ZnS:Mn2+ Nanorods to Microparticles for Enhanced Mechanoluminescence

“…For example, sphalerite ZnS mixed with a determined ratio of MnCO 3 was calcined at 1050 or 1100 °C to form Mn 2+ -doped ZnS possessing an ML property under an external pressure. , The particles prepared in this way usually show large particle sizes (>20 μm) due to the significant sintering under the extreme conditions. , However, the considerable dimensions of this magnitude are often unsuitable for many application scenarios that demand materials of approximately one micron in size or even smaller, including bioimaging, optogenetics, thin-film luminescence, and sensing. For example, small particles are desirable in order to circulate through the blood vessels (8 μm on average for capillaries) for bioimaging or optogenetic purposes. − Also, size reduction is found to enhance the luminescence brightness and sensitivity of nanoparticles for optical and sensing applications. − To this end, exploring the mechanoluminescent properties of small-sized ZnS particles may provide opportunities for developing broader applications. , On the other hand, nanoscale wurtzite ZnS with spherical or rodlike shapes can be synthesized in much milder solvothermal conditions, for example, using ethylene glycol or ethylenediamine/water as the solvent. − However, the as-prepared ZnS nanostructures do not exhibit observable ML properties. Therefore, it is of fundamental importance to study how ML is generated when the size of the nanoscale precursors gradually increases upon calcination at high temperatures.…”

Gold Nanoparticles and Surfactant-Based Electrochemical Sensing Platform for the Detection and Electroanalysis of the Anticancer Drug Oxoplatin

“…In another study Karimi-Maleh, H. et al utilized AuNPs/PPy/Ti 3 C 2 T x for the selective and sensitive detection of Pb 2+ up to the concentration of 0.01 pm. 37 Furthermore, AuNPs were immobilised on the carbon paste electrode (CPE) surface using physical adsorption and electrodeposition techniques to facilitate the electron transfer of heme proteins for the detection of hydroquinone, nitrites, phenols, dopamine, hydrogen peroxide, and glucose. 15,[37][38][39] In this study, a thiourea-based surfactant and Au NPs have been utilised to increase the catalytic property of the electrode surface.…”

“…37 Furthermore, AuNPs were immobilised on the carbon paste electrode (CPE) surface using physical adsorption and electrodeposition techniques to facilitate the electron transfer of heme proteins for the detection of hydroquinone, nitrites, phenols, dopamine, hydrogen peroxide, and glucose. 15,[37][38][39] In this study, a thiourea-based surfactant and Au NPs have been utilised to increase the catalytic property of the electrode surface. 16,40 1-(2, 4-dinitrophenyl)-dodecanoylthiourea (DAN) and NPs can function as an electrocatalyst for the detection of analytes based on the unique interaction of the chosen surfactant.…”