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24 results on '"Cao, Linyuan"'

23. In situ Controllable Growth of Prussian Blue Nanocubes on Reduced Graphene Oxide: Facile Synthesis and Their Application as Enhanced Nanoelectrocatalyst for H2O2 Reduction

Author

Cao, Linyuan, Liu, Yanlan, Zhang, Baohua, and Lu, Lehui

Abstract

As a single-atom-thick carbon material with high surface area and conductivity, graphene provides an ideal platform for designing composite nanomaterials for high-performance electrocatalytic or electrochemical devices. Herein, we demonstrated a facile strategy for controllably growing high-quality Prussian blue nanocubes on the surface of reduced graphene oxide (PBNCs/rGO), which represents a new type of graphene/transition metal complex heterostructure. The merit of this method is that the composite nanomaterials could be produced directly from GO in an in situ wet-chemical reaction, where the reduction of GO and the deposition of PBNCs occurred simultaneously. The obtained composite nanomaterials were characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman spectroscopy, and electrochemical techniques. It was found that uniform PBNCs with controlled size and good dispersion were directly grown on the surface of graphene nanosheets. Moreover, we also investigated the performance of PBNCs/rGO nanocomposites as amperometric sensor toward reduction of H2O2. Such a sensor showed a rapid and highly sensitive response to H2O2with a low detection limit (45 nM), which might find promising applications in developing a new type of enzymeless biosensor.

Published
2010
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24. A facile method for fabrication of highly ordered hollow Ag/TiO2 nanostructure and its photocatalytic activity

Author

Liu, Weijie, Zhao, Xinmei, Cao, Linyuan, Zou, Bo, Zhang, Guo, Lu, Lehui, and Cui, Haining

Subjects
*TITANIUM dioxide, *NANOSTRUCTURED materials, *PHOTOCATALYSIS, *SEMICONDUCTORS, *COLLOIDAL crystals, *POROSITY, *PHOTODEGRADATION
Abstract

Abstract: This letter reports a facile and efficient strategy for the designed preparation of highly ordered hollow Ag/TiO2 nanostructure. Different from previous reports, the presently proposed method conveniently combines the long-range ordering porosity and the property of Ag nanoparticles by a general colloidal crystal-templating technique. The sample was characterized by SEM and XRD. The results show that such hollow nanostructured material is composed of anatase TiO2 and metal Ag. The as-prepared sample shows a good photocatalytic activity for photodegradation of methyl orange compared with the reference samples, which was attributed to its long-range ordering porosity and the addition of Ag nanoparticles. [Copyright &y& Elsevier]

Published
2009
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