Ultra-trace simultaneous detection of Hg(II), Cd(II), and Cu(II) and mechanism based on Co/CoO/Co3O4 Z-type heterojunctions

Hydrophilic amorphous Cr2O3 supported Co species toward efficient hydrogen production from ammonia borane under visible light irradiation

“…S6†), suggesting the formation of amorphous Co species which is consistent with previous reports. 37 Additionally, the broad peak around 45° assigned to Co can further confirm the existence of amorphous Co. 38 BET surface area of Cr 2 O 3 -F-0.5 was calculated to be 246.2512 m 2 g −1 which is smaller than Co/Cr 2 O 3 -F-0.5 (296.8048 m 2 g −1 ) (Fig. S7 and S8†).…”

Recent Progress of Covalent Organic Frameworks Applied in Electrochemical Sensors

“…In comparison to SPME and chromatography, COF-based electrochemical sensors have higher sensitivity, and in comparison to luminescent and colorimetric sensing, The working electrode plays an important role in the qualitative and quantitative detection performance of the sensor. Many advanced materials have been applied to prepare the working electrodes of electrochemical sensors, mainly including graphene, 64 carbon nanotubes (CNTs), 65 quantum dots (QDs), 66 metal nanoparticles (NPs), 67 metal oxides, 68 conductive polymers (CPs), 69 biomolecules, 70 enzyme, 71 black phosphorus, 72 Mxene, 73 polyoxometalates (POMs), 74 Perovskite, 75 MOFs, 76 COFs, 77 and so on. Compared with other materials, COFs possess excellent structural diversity, enabling them to be fine-tuned to meet specific sensing requirements.…”

Green synthesis of copper oxide nanoparticles using Ficus elastica extract for the electrochemical simultaneous detection of Cd2+, Pb2+, and Hg2+

“…In this context, the use of electrochemical sensors is unanimously accepted as an effective alternative to traditional methods for determining the presence of multiple analytes with comparable performances to spectrometric methods, such as reasonable accuracy, simplicity, low cost, and improved selectivity. But the most sought feature is, as developed by some researcher's teams 16,17 the fast individual and simultaneous determination of heavy metals. Furthermore, electrochemical methods allow the identication and determination of these chemical components in real samples, leading to an improved protection of the environment.…”