ZnS and Reduced Graphene Oxide Nanocomposite-Based Non-Enzymatic Biosensor for the Photoelectrochemical Detection of Uric Acid.

In this work, we report a study of a zinc sulfide (ZnS) nanocrystal and reduced graphene oxide (RGO) nanocomposite-based non-enzymatic uric acid biosensor. ZnS nanocrystals with different morphologies were synthesized through a hydrothermal method, and both pure nanocrystals and related ZnS/RGO were characterized with SEM, XRD and an absorption spectrum and resistance test. It was found that compared to ZnS nanoparticles, the ZnS nanoflakes had stronger UV light absorption ability at the wavelength of 280 nm of UV light.

Regulating the Polypyrrole Ion-Selective Membrane and Au Solid Contact Layer to Improve the Performance of Nitrate All-Solid Ion-Selective Electrodes.

With polymerization duration and Au concentration of the electrolyte regulated, a desirable nitrate-doped polypyrrole ion-selective membrane (PPy(NO)-ISM) and Au solid contact layer of anticipate surface morphology were obtained, and the performance of nitrate all-solid ion-selective electrodes (NS ISEs) was improved. It was found that the roughest PPy(NO)-ISM remarkably increases the actual contact surface area of the PPy(NO)-ISMs with nitrate solution, which leads to better adsorption of NO ions upon the PPy(NO)-ISMs, and produces a larger number of electrons. The most hydrophobic Au solid contact layer avoids the formation of the aqueous layer at the interface between the PPy(NO)-ISM and Au solid contact layer, and ensures unimpeded transporting of the produced electrons.

High-Sensitivity Enzymatic Glucose Sensor Based on ZnO Urchin-like Nanostructure Modified with FeO Magnetic Particles.

A novel and efficient enzymatic glucose sensor was fabricated based on FeO magnetic nanoparticles (FeOMNPs)-modified urchin-like ZnO nanoflowers (ZnONFs). ZnONFs were hydrothermally synthesizing on a flexible PET substrate. FeOMNPs were deposited on the surface of the ZnONFs by the drop-coating process.

Regulation of the Volume Flow Rate of Aqueous Methyl Blue Solution and the Wettability of CuO/ZnO Nanorods to Improve the Photodegradation Performance of Related Microfluidic Reactors.

Six CuO/ZnO nanorod (CuO/ZnONR)-based microfluidic reactors were constructed for different UV irradiation durations, with which an aqueous methylene blue (MB) solution was photodegraded at varied volume flow rate . Via numerical and experimental routes, the effects of the on the kinetic adsorption rate constant and the initial rate constant of the CuO/ZnONR-based microfluidic reactors were discussed. Moreover, a reverse contacting angle (CA) trend of CuO/ZnONRs to the reaction constant curve of corresponding CuO/ZnONR-based microfluidic reactor suggested that the CA of CuO/ZnONRs was another key influencing factor that affected greatly the photodegradation performance of the microfluidic reactors.

Modulation of Stainless-Steel Wire Sieve-Supported ZnO Nanorods for Optimal De-Ionized Water/Diesel Oil Separation.

ZnO nanorods (ZnONRs) were hydrothermally synthesized on stainless-steel wire (SSW) sieves of various mesh sizes at different Zn concentrations of the growth solution, and then treated with stearic acid (SA) for a specific duration. Using these SSW sieve-supported ZnONRs, a mixture of de-ionized (DI) water and diesel oil was separated. It was found that the SA treatment dramatically diminished the quantity of surface hydroxyl groups attached to the top and upper portions of the ZnONRs, and thus significantly enhanced the hydrophobicity of the ZnONR-coated SSW sieves.