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AuNPs/GO/Pt microneedle electrochemical sensor for in situ monitoring of hydrogen peroxide in tomato stems in response to wounding stimulation.
Anal Bioanal Chem
January 2025
School of Life Sciences, Nantong University, 9 Seyuan Road, Nantong, 226019, Jiangsu, China.
Hydrogen peroxide (HO) is a critical signaling molecule with significant roles in various physiological processes in plants. Understanding its regulation through in situ monitoring could offer deeper insights into plant responses and stress mechanisms. In this study, we developed a microneedle electrochemical sensor to monitor HO in situ, offering deeper insights into plant stress responses.
View Article and Find Full Text PDFElectrochemical insights into the direct dissolution of impure sphalerites and their partial oxidation in an acidic environment.
Sci Rep
January 2025
Department of Mining and Explosives Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.
This study examined the electrodissolution mechanism of five impure sphalerite samples, which differ significantly in purity levels, along with their partially oxidized counterparts in a 0.5 M HSO. Partially oxidized samples were prepared through an incomplete leaching of sphalerite using HSO with Fe(SO).
View Article and Find Full Text PDFCerium oxide nanoparticles decorated on graphene oxide nanosheets as battery-type cathode material for supercapacitors.
J Colloid Interface Sci
January 2025
Department of Physics, Malaviya National Institute of Technology Jaipur, Rajasthan 302017 India. Electronic address:
Designing advanced materials that effectively mitigate the poor cycle life of battery-type electrodes with high specific capacities is crucial for next-generation energy storage systems. Herein, graphene oxide-ceria (GO-CeO) nanocomposite synthesized via a facile wet chemical route is explored as cathode for high-performance supercapacitors. The morphological analysis suggests fine ceria (CeO) nanoparticles dispersed over ultrathin graphene oxide (GO) sheets while structural studies reveal face-centered cubic phase of CeO in the nanocomposite.
View Article and Find Full Text PDFrGO/HfO nanocomposite-enabled electrochemical sensor for high-performance pesticide detection.
Talanta
January 2025
Department of Chemical and Biomolecular Engineering, University of Connecticut, CT, 06269, United States. Electronic address:
This study applies a periodic table-guided approach to select and investigate hafnium oxide (HfO), in conjunction with reduced graphene oxide (rGO), for the electrochemical determination of methyl parathion (MP), an organophosphate insecticide. MP poses significant ecological and health risks due to its high toxicity, and despite bans, illegal use has been reported, especially in the global south. To address these challenges, an electrode modified with a nanocomposite of rGO/HfO was first constructed for MP detection.
View Article and Find Full Text PDFIsoelectric Point of Metal Oxide Films Formed by Anodization.
Langmuir
January 2025
Chemistry and Structure of novel Materials, University of Siegen, Paul-Bonatz Strasse 9-11, 57068 Siegen, Germany.
The surface charge of metal oxides is an important property that significantly contributes to a wide range of phenomena, including adsorption, catalysis, and material science. The surface charge can be predicted by determining the isoelectric point (IEP) of a material and the pH of a solution. Although there have been several studies of the IEP of metal oxide (nano)particles, only a few have reported the IEP of metal oxide films.
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