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Abstract: The spherical particles CdSe x S1− x with 30–80 nm in radius have been successfully prepared by the hydrothermal reaction at 200 °C. The structure characterization which has been carried out using X-ray diffraction (XRD) shows hexagonal crystal structure. Novel properties have been observed via UV–visual absorption spectra and photoluminescence (PL) spectra. The absorption shoulder and the luminescence emission peaks have been tuned by changing the mole ratio of Se in the CdSe x S1− x samples. [Copyright &y& Elsevier]

Abstract: Simple chemical deposition was used to prepare three types of amoxicillin nanostructures. Their morphology and size were characterized by scanning electron microscopy, and their chemical bonds were examined by Fourier transform infrared spectrum. Our results show that amoxicillin nanobelts, nanofibers, nanoparticles, and microparticles can be obtained by changing the pH in solutions of amoxicillin sodium. To some degree the controllable growth of amoxicillin can be realized. [Copyright &y& Elsevier]

Abstract: Tri(8-hydroquinoline)aluminum (AlQ3) nanowires, nanowalls, complex nanostructure composed of microspheres and nanowires, micro-spherical chains were successfully synthesized by simple physical vapor condensation. The effect of the deposition temperature on the morphologies of AlQ3 has been investigated. Fourier transform infrared spectroscopy (FT-IR) was used to examine the chemical bonding of products as-prepared. Environmental scanning electronic microscopy (ESEM) was performed to analyze the morphologies of the samples. FT-IR results indicated that the AlQ3 molecules had a strong thermal stability. The photoluminescence (PL) spectra showed that there was no apparent blue shift because the AlQ3 molecules are bonded by relatively weak Van der Waals forces. These different structures depended on the deposition temperatures would be believed to attractive building field-emission devices and other optical devices. [Copyright &y& Elsevier]

Abstract: The influence of selenium dioxide (SeO2) on the microstructure and electrodeposition of manganese coatings obtained from a sulfate based neutral solution was investigated by material characterization methods and electrochemical techniques. The crystal structure and surface morphology of these coatings were studied by scanning electron microscopy (SEM) and powder X-ray diffraction spectroscopy (XRD), respectively. The SEM and XRD data showed that SeO2 could effectively accelerate phase transformation, and facilitate leveled and fine grain growth. The electrochemical results indicated that SeO2 could inhibit hydrogen evolution reaction and promote manganese deposition. The action of selenium dioxide in manganese deposition was found to be a reduction and adsorption mechanism. The process could be explained as following: First, Se (IV) was reduced to Se (0), and part of Se (0) future reduce to selenide, which then combined with the remainder Se (0) forming a complicate compound (multi-selenium ions). [Copyright &y& Elsevier]

Abstract: Single-crystalline α-MnO2 nanorods have been successfully synthesized by a novel hydrothermal method based on the redox reactions between the permanganate anion MnO4 – and H2O in mixture containing KMnO4 and HNO3. The products have been characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), Fourier transform infrared spectrum (FT-IR) and Brunauer–Emmett–Teller (BET). The results prove that the grain size of α-MnO2 nanorods with the surface area ∼95.2m2 g−1 is homogeneous with diameters ranging from 10 to 20nm. The electrochemical property of the material shows that compared with the commercial electrolytic manganese dioxide (EMD), the discharge capacity of the as-prepared α-MnO2 nanorods is increased by 70.4%, 104.1% and 135.7% at different constant currents of 50, 250 and 500mAg−1, respectively. [Copyright &y& Elsevier]

Abstract: Mesoporous MnO2 with uniform nanorod morphology and mesoporous β-MnO2 were prepared using SBA-15 and KIT-6 as the templates, respectively. XRD, nitrogen adsorption analysis, SEM, TEM and EDX techniques were used for the structural characterization. The electrochemical properties of the MnO2 samples were studied using alkaline Zn/MnO2 batteries in a 9M KOH electrolyte solution. Compared to the commercial electrolytic manganese dioxide (EMD), the discharge capacity of the mesoporous MnO2 nanorods increased by 74.98%, 119.74% and 146.19% at constant currents of 50, 250 and 500mAg−1, respectively, while the discharge capacity of the mesoporous β-MnO2 increased by 63.58%, 95.14% and 100.23%. [Copyright &y& Elsevier]

Abstract: Various α-MnO2 nanostructures have been successfully synthesized by a simple hydrothermal method based on the redox reactions between the MnO4 − and H2O in mixture containing KMnO4 and HNO3. The effect of varying the hydrothermal time to synthesize MnO2 nanostructures and the forming mechanism of α-MnO2 nanorods were investigated by using XRD, SEM and TEM. The results revealed an evolvement of morphologies ranging from brushy spherical morphology to nanorods depending upon the hydrothermal time. The surface area of the synthesized nanomaterials varied from 89 to 119m2/g. Electrochemical properties of the products were evaluated using cyclic voltammetry and galvanostatic charge–discharge studies, and the sample obtained by hydrothermal reaction for 6h at 120°C showed maximum capacitance with a value of 152F/g. In addition, long cycle life and excellent stability of the material were also demonstrated. [Copyright &y& Elsevier]