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SHIYONG BAO,HAN ZHU,PAN WANG,MEILING ZOU,MINGLIANG DU,MING ZHANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.6
A facile and green route was introduced to synthesize Pt nanoparticles (PtNPs) immobilized on Cu2O octahedrons to form Cu2O–Pt hierarchical heterostructure. Transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were employed to study their morphology, chemical and crystallographic properties of the Cu2O–Pt hierarchical heterostructure. These novel Cu2O–Pt hierarchical heterostructures show fascinating degradations of methylene blue (MB), due to the suppressed electron/hole recombination phenomena and the efficient ability to capture the light.
Lv Yan Ling,Tengchong,Ge Bao Jun,Wen Ruxin,Xiao Shiyong,Li Mengqiao 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.5
Choosing a correct main protection configuration schemes for stator internal short circuits in generator is the premise of safe and reliable operation of the large generator. This paper firstly analyzes the general large hydro-generator stator internal short circuit fault type and fault number. It mainly does some statistics works on SF600-42/1380 generator fault location and fault number. And then through the finite element method, calculate each phase and each branch current if the generator internal short circuit happens. In the paper, we calculate the sensitivity of various kinds of main protection scheme. Get the dead zone position which easily lets the main protection device take action. Finally we summarize various factors that determine SF600-42/1380 generator main protection scheme of configuration.
MEILING ZOU,HAN ZHU,PAN WANG,MINGLIANG DU,MING ZHANG,SHIYONG BAO 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.3
In this paper, epigallocatechin gallate (EGCG) was used as a green reductant both for thefabrication of soluble reduced graphene oxide (rGO) and the synthesis of Au nanoparticles/rGOnanocomposite. Fourier transform infrared (FTIR) spectra con¯rmed the e±cient removal of theoxygen-containing groups in graphene oxide (GO) through the reduction act of EGCG. Aunanoparticles (AuNPs) were anchored onto the rGO sheets by heating the mixed solution of rGOand chloroauric acid at 65?C using EGCG as reductant. Transmission electron microscopy(TEM), atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS) wereemployed to characterize the resulting nanocomposite. Due to the chelating e®ect of polyhydroxyEGCG, AuNPs with diameters of ? 20 – 50 nm were stably decorated onto both sides of the rGOsheets. Because this reduction method avoids the use of toxic reagents, AuNPs/rGO nano-composite would be eco-friendly, and it might be useful not only for electronic devices but also forbiocompatible materials in the future applications.