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RISS 인기검색어
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- 저자 : Xinglong Xie (검색결과 3 건)
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Xinglong Xie,Yu Qiu,Sen Zhao,Hai-Ying Jiang,Jinjun Lu 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.10
We recently reported that PhC2Cu nanobelt exhibits excellent photocatalytic degradation of organic pollutants and activation of molecular O2. However, there has been no further research about the relationship between its crystal structure and photocatalytic activity. Herein, a new safe and energy-save method, photo-synthesis, to prepare PhC2Cu nanobelts with preferential active exposure facet was developed. It was used to study the relationship between its crystal structure and photocatalytic activity, compared to the PhC2Cu nanobelts prepared by thermal-synthesis method. The prepared samples were characterized by X-ray powder diffractometer (XRD), field-emission scanning electron microscopy (FE-SEM), ultraviolet-visible (UV-vis) absorbance spectra and diffuse reflectance spectra (UV-vis Abs and DRS), N2 adsorption-desorption isotherms, FT-IR and Raman spectra. The degradation of MB experiments under visible light irradiation shows that the photocatalytic activity of PhC2Cu prepared by photo-synthesis method is much higher than that by traditional thermal-synthesis method. Moreover, the photocatalytic mechanism of PhC2Cu nanobelts was further studied by the photocatalytic generation of O2 • and •OH.
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Ranran Li,Jieyi Yu,Asif Shah,Xinglong Dong,Xiaona Li,Hongtao Yu,Xie Quan,Youngguan Jung 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.2
Core/shell type carbon-coated Fe nanocapsules (Fe@C NCs) were in situ synthesized by DC arcdischarge plasma method in methane atmosphere. Such Fe nanocapsules have saturation magnetization of 29.32 emu/g and specific surface area of 85.86 m2/g. The carbon shell of Fe@C NCs was functionalized with oxygen-containing groups (such as –OH or –COOH) by using H2O2. The adsorption of organic dye, e.g., methylene blue (MB) was systematically investigated in different conditions, such as contact time, pH values and temperature. The maximum adsorption capacity (46.5 mg/g) was calculated by fitting the adsorption isotherms with Langmuir model, coincident with the experimental result of 44.5 mg/g. Kinetics data supported pseudo-second order model, and the thermodynamic process of adsorption was revealed as endothermic and spontaneous physisorption. The MB-absorbed Fe@C NCs can be entirely separated from the contaminative solution by a magnetic field and then successfully cycled for regeneration. After repetitive cycles of the adsorption/desorption experiments for five times, the removal efficiency can be maintained over 90%.
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Design and properties analysis of total internal reflection gratings for pulse compressor at 1053 nm
Qunyu Bi,Jiangjun Zheng,Ailin Guo,Meizhi Sun,Jianpeng Wang,Fuling Zhang,Qingwei Yang,Xinglong Xie,Zunqi Lin 한국물리학회 2011 Current Applied Physics Vol.11 No.1
High-efficiency compression gratings based on total internal reflection (TIR) are promising alternatives of compressor gratings because of their high diffraction efficiency, potential high damage resistant ability,and compact structure. Dependence of the 1 order diffraction efficiencies on grating parameters is analyzed for TE- and TM-polarized incident light of 1053 nm at Littrow angle, which is calculated by using the rigorous coupled-wave analysis. A more intuitional view on the relation is offered through three-dimensional slicing figures instead of two-dimensional ones. The performances of high-efficiency gratings are compared and regarded as criteria for further choices, including spectral bandwidth, angle bandwidth, dispersion, and intensity distribution. For TE- and TM-irradiations, similar spectral bandwidth and angle bandwidth can be achieved by different grating parameters. However, the computer simulation result on the intensity distributions of the two polarized waves shows that such design should be used under the illumination of TE-polarized wave for lower intensity enhancement ratio,which is an important factor related to the gratings’ damage threshold.
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