Hefei, China
Hefei, China

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Wang Y.F.,Shaanxi Normal University | Zeng J.H.,Shaanxi Normal University | Zeng J.H.,NanoGEN Co.
Organic Communications | Year: 2013

CuO-Al2O3 catalyzed one-pot oxidation with O2 and self-coupling of benzylamines to give Nbenzylbenzaldimines was described in good yields. Similarly, secondary dibenzylamines were oxidized to Nbenzylbenzaldimines. © 2013 Reproduction is free for scientific studies.


Wang Y.F.,Shaanxi Normal University | Wang Y.F.,NanoGen Co. | Zeng J.H.,Shaanxi Normal University | Zeng J.H.,NanoGen Co. | Li Y.,Shaanxi Normal University
Electrochimica Acta | Year: 2013

Nanocables of silver nanowire/titania sheath hetero-structure are synthesized and applied in photo-anode of dye-sensitized solar cells. The metal/semiconductor hetero-structure builds Schottky barrier which favors the extraction and transportation of photo-generated electrons. The short circuit current is improved from 5.70 mA to 8.91 mA aided by 1 wt% nanocables with a conversion efficiency enhancement of 37.9% on 1 cm × 1 cm cells. Electrochemical impedance spectroscopy studies suggest that the boost of short circuit current is ascribed to the reduce resistance in the TiO 2/dye/electrolyte. The present results pave a novel path for high-performance dye sensitized solar cells. © 2012 Elsevier Ltd.


Wang Y.F.,Shaanxi Normal University | Wang Y.F.,NanoGEN Co. | Zhang J.M.,Shaanxi Normal University | Cui X.R.,Shaanxi Normal University | And 3 more authors.
Electrochimica Acta | Year: 2013

An organic ionic plastic crystal (OIPC) 2-hydroxyethyltrimethylammonium iodide (choline iodide) as an important component in solid electrolyte is synthesized and applied in dye-sensitized solar cells. It allows relatively rapid diffusion of the redox couple through the plastic crystal phase that is critical to the cell performance. The novel material, utilizing strong quaternary ammonium cation 2-hydroxyethyltrimethylammonium (HETA+) as a cation donor, is treated as matrix in electrolyte. At optimal condictions, the cell gives a short-circuit photocurrent density (Jsc), open-circuit voltage (Voc) and fill factor (FF) of 6 mA cm -2, 0.69 V and 63%, respectively. The corresponding overall conversion efficiency (η) is 2.5%. The results suggest that the OIPC is a promising solid electrolyte material for dye-sensitized solar cells applications. © 2013 Elsevier Ltd.


Wang Y.F.,Shaanxi Normal University | Wang Y.F.,NanoGen Co. | Zeng J.H.,Shaanxi Normal University | Zeng J.H.,NanoGen Co. | Gong C.H.,Shaanxi Normal University
Materials Research Bulletin | Year: 2014

A layer of titania semi-spherical shell is assembled onto the titania nano-crystalline film to serve as photo-anode in dye-sensitized solar cells. The shell performs as a concave mirror. Unlike random scattering centers, the unique structure reflects full band of the incident light back to the titania nano-crystalline film in a convergent way. As a result, conversion efficiency is drastically enhanced by the semi-spherical shell coating with a maxima ratio of over forty-seven percent on cells with an effective area of 100 mm2. © 2013 Elsevier Ltd. All rights reserved.


Zeng J.H.,Shaanxi Normal University | Zeng J.H.,NanoGEN Co. | Wang Y.F.,Shaanxi Normal University | Wang Y.F.,NanoGEN Co. | And 2 more authors.
Journal of Materials Chemistry | Year: 2010

Sea-urchin shaped γ-MnO2 hierarchical structures have been synthesized using a facile hydrothermal method without employing any template or surfactant with mild conditions. The as-synthesized samples were characterized by instrumental analyses such as XRD, SEM, and EDXS. γ-MnO2 sea-urchins are assembled from nanowires of 20-50 nm in width and up to 3 μm in length. Electrochemical investigations indicate that the sea-urchin shaped γ-MnO2 hierarchical nanostructures exhibit favorable performance compared to commercial manganese dioxide as cathode active materials in rechargeable Li-MnO2 cells. The sample retains a performance of 101 mA h g-1 after 20 charge/discharge cycles. © The Royal Society of Chemistry 2010.


Jin B.B.,Shaanxi Normal University | Jin B.B.,Institute of Chemical Technology | Zeng J.H.,Shaanxi Normal University | Zeng J.H.,NanoGEN Co. | And 3 more authors.
Materials Letters | Year: 2012

Uniform single-crystalline ZnO round nanodisks have been synthesized hydrothermally. The microstructure of samples is studied by X-ray diffraction, scanning electron microscope, high-resolution transmission electron microscope and selected area electron diffraction. The nanodisk is dominated by circular column-based thin disk of about 1.5 μm in diameter and 300 nm in thickness. The growth is favored along directions perpendicular to the [0001] zone axis with the typical growth along the [0001] direction suppressed, which directly leads to the formation of zinc oxide round nanodisk. The growth mechanism of the nanodisk is discussed. This work presents a simple and effective route for large-scale fabrication of uniform single-crystal round nanodisk. © 2012 Elsevier B.V. All rights reserved.


Zeng J.H.,Shaanxi Normal University | Zeng J.H.,NanoGEN Co. | Wang Y.F.,Shaanxi Normal University | Wang Y.F.,NanoGEN Co.
Journal of the American Ceramic Society | Year: 2010

Eu3+-doped silicate phosphors are prepared hydrothermally. The effects of mineralizer, concentration, source materials, reaction time, and temperature were are studied. X-ray diffraction and scanning electron microscopy were applied to characterize the phase and morphology of the products. Thermo stability was evaluated by thermal gravimetric analysis and differential scanning calorimetry analysis. Photoluminescence spectroscopy was used to study the luminescent properties. © 2010 The American Ceramic Society. © 2010 The American Ceramic Society.


Trademark
Elitechgroup B.V., Elitech Holding B.V. and Nanogen Inc. | Date: 2010-06-29

Biochemical reagents commonly known as probes, for detecting and analyzing molecules in protein or nucleotide arrays; Chemical solutions and preparations consisting of pre-mixed reactants and reagents for scientific and research use in connection with amplification, analysis or labeling of nucleic acid; Diagnostic preparations for scientific or research use, excluding diagnostic preparations intended specifically for scientific or research use for the treatment of animals; Diagnostic reagents for clinical or medical laboratory use, excluding diagnostic reagents intended specifically for clinical or medical laboratory use for the treatment of animals; Diagnostic reagents for in vitro use in biochemistry, clinical chemistry and microbiology; Reagents for research purposes, excluding reagents intended specifically for research for the treatment of animals; Reagents for scientific or medical research use, excluding reagents intended specifically for scientific or medical research use for the treatment of animals; Reagents for use in scientific apparatus for chemical or biological analysis, excluding reagents intended specifically for chemical or biological analysis for the treatment of animals. Medical diagnostic reagents, excluding medical diagnostic reagents intended specifically for the treatment of animals; Medical diagnostic reagents and assays for testing of body fluids, excluding medical diagnostic reagents and assays intended specifically for testing of animal body fluids.


Trademark
Nexus Dx and Nanogen Inc. | Date: 2011-10-04

Diagnostic kits consisting primarily of monoclonal antibodies, buffers, and reagents for use in disease testing; and medical diagnostic reagents and assays for testing of body fluids.


Trademark
Nexus Dx and Nanogen Inc. | Date: 2011-09-13

Diagnostic kits consisting primarily of monoclonal antibodies, buffers, and reagents for use in disease testing; and medical diagnostic reagents and assays for testing of body fluids.

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