No abstract

No abstract

A hierarchical ZnO structure assembled by nanosheets was prepared through a low temperature chemical bath deposition and a growing-melting mechanism was proposed to elucidate the shape evolution. Afterwards, a poly (vinylpyrrolidone) (PVP) assisted hydrothermal method was adopted to decorate TiO 2 particles onto the ZnO structure. When used in dye-sensitized solar cells, the device employing the hybrid ZnO/TiO 2 photoanode exhibited improved short-circuit current density (J sc ), open-circuit voltage (V oc ) and filling factor (FF), which resulted in a higher power conversion efficiency (PCE) of 3.60% in comparison to 1.96% from the pure ZnO cell. Based on the investigation of UV-vis absorption and diffuse-reflection spectra, Mott-Schottky analysis, electronic impedance spectra (EIS) and incident monochromatic photo-to-electron conversion efficiency (IPCE), the effect of TiO 2 modification on the photovoltage performances of the ZnO sheet-based hierarchical structures was studied in detail.

No abstract

Sb2S3 dendrites composed of 1-dimensional rods were prepared by a facile solvothermal reaction. The dosage of the poly(acrylic acid) (PAA) morphology-controlling reagent and the reaction temperature are key factors determining the final morphology of the product. Temporal experiments revealed that the formation of Sb2S3 dendrites experienced successive stages including precipitate reaction, crystallization and tip splitting. The as-prepared Sb2S3 dendrites were further employed as sensing material for electrochemical detection of dopamine (DA). A cyclic voltammogram (CV) showed that an Sb2S3 dendrite modified electrode enables the selective electro-oxidation of DA in the presence of ascorbic acid (AA). The constructed biosensor demonstrated a linear response range of 0.125-160 μM and a detection limit of 0.1 μM, which suggests that the Sb2S3 dendrites are promising sensing materials in the electrochemical analysis of DA.