Construction of Flower-like PtO@ZnO/InO Hollow Microspheres for Ultrasensitive and Rapid Trace Detection of Isopropanol.

The design of a highly effective isopropanol gas sensor with high response and trace detection capability is extremely important for environmental surveillance and human health. Here, novel flower-like PtO@ZnO/InO hollow microspheres were prepared by a three-step approach. The hollow structure was composed of an InO shell inside and layered ZnO/InO nanosheets outside with PtO nanoparticles (NPs) on the surface.

NH Sensor Based on 3D Hierarchical Flower-Shaped -ZnO/-NiO Heterostructures Yields Outstanding Sensing Capabilities at ppb Level.

Hierarchical three-dimensional (3D) flower-like -ZnO/-NiO heterostructures with various ZnNi molar ratios (ZnNi, ZnNi, ZnNi, ZnNi and ZnNi) were synthesized by a facile hydrothermal method. Their crystal phase, surface morphology, elemental composition and chemical state were comprehensively investigated by XRD, SEM, EDS, TEM and XPS techniques. Gas sensing measurements were conducted on all the as-developed ZnNi-based sensors toward ammonia (NH) detection under various working temperatures from 160 to 340 °C.

Rapid and Stable Detection of Carbon Monoxide in Changing Humidity Atmospheres Using Clustered InO/CuO Nanospheres.

Clustered indium oxide/copper oxide (InO/CuO) nanospheres with different CuO amounts were successfully synthesized as sensing materials for the carbon monoxide (CO) detection. Component and morphological characterizations were performed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Sensing performance for CO of the clustered InO and InO/CuO nanospheres were investigated under different temperatures and humidity conditions.

Selective gas detection using MnO/WO composites as a sensing layer.

Pure WO sensors and MnO/WO composite sensors with different Mn concentrations (1 atom %, 3 atom % and 5 atom %) were successfully prepared through a facile hydrothermal method. As gas sensing materials, their sensing performance at different temperatures was systematically investigated for gas detection. The devices displayed different sensing responses toward different gases at specific temperatures.

Ultraselective Toluene-Gas Sensor: Nanosized Gold Loaded on Zinc Oxide Nanoparticles.

Selectivity is an important parameter of resistive-type gas sensors that use metal oxides. In this study, a highly selective toluene sensor is prepared using highly dispersed gold-nanoparticle-loaded zinc oxide nanoparticles (Au-ZnO NPs). Au-ZnO NPs are synthesized by coprecipitation and calcination at 400 °C with Au loadings of 0.

Hepatoprotective effect against CCl4-induced acute liver damage in mice and High-performance liquid chromatography mass spectrometric method for analysis of the constituents of extract of Rubus crataegifolius.

This study is an attempt to evaluate the hepatoprotective activity of Rubus Crataegifolius against carbon tetrachloride-induced liver injury in mice. 70% ethanolic, ethyl acetate and n-BuOH extract of R. crataegifolius were administered daily for 14 days in experimental animals before they were treated with CCl.

Preparation and characterization of AuNPs/CNTs-ErGO electrochemical sensors for highly sensitive detection of hydrazine.

A highly sensitive electrochemical sensor of hydrazine has been fabricated by Au nanoparticles (AuNPs) coating of carbon nanotubes-electrochemical reduced graphene oxide composite film (CNTs-ErGO) on glassy carbon electrode (GCE). Cyclic voltammetry and potential amperometry have been used to investigate the electrochemical properties of the fabricated sensors for hydrazine detection. The performances of the sensors were optimized by varying the CNTs to ErGO ratio and the quantity of Au nanoparticles.