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- 저자 : Aijuan Xie (검색결과 2 건)
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Cerium-loaded MnOx/attapulgite catalyst for the low-temperature NH3-selective catalytic reduction
Aijuan Xie,Xingmeng Zhou,Xiaoyan Huang,Liang Ji,Wenting Zhou,Shiping Luo,Chao Yao 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.49 No.-
A series of MnO2/attapulgite (ATP) and n(Ce):n(Mn)/ATP (molar ratios) catalysts were prepared andinvestigated for the selective catalytic reduction of NO by NH3 (NH3-SCR) at low temperature. The resultsshowed that the 7 wt % MnO2/ATP exhibited the best NOx conversion (85% at 300 C) among all MnO2/ATPcatalysts of different mass ratios. The introduction of cerium enhanced the NOx conversion at lowtemperature, and so Ce–MnOx/ATP can reach the highest NOx conversion (95% at 300 C). Meanwhile, theas-prepared catalysts were characterized by XRD, TEM, BET, H2-TPR, NH3-TPD, and XPS. It can be deducedfrom TEM, XRD, and BET, MnOx nanorods in this work mainly existed in the b-MnO2, and cerium highlydispersed on the surface of ATP to form porous structure and thus improved the deNOx performance. Moreover, the study of SO2 tolerance demonstrated that cerium can effectively inhibit SO2 poison. XPSresults illustrated that Ce could enhance Mn4+ content on the surface of the catalyst and thus lead to highSCR activity. Therefore Mn(1):Ce(0.25)/ATP was proved to be an excellent catalyst for NH3-SCR.
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Titanium Dioxide–Graphene–Polyaniline Hybrid for Nonenzymatic Detection of Glucose
Jiawen Du,Yiyang Tao,Zhichen Xiong,Xianglang Yu,Aijuan Xie,Shiping Luo,Xiazhang Li,Chao Yao 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.7
A novel titanium dioxide–graphene–polyaniline (TiO2–RGO–PANI) hybrid was prepared by the one-pot method and used as a nonenzymatic electrochemical sensor for glucose detection. The composition and structural morphology of the as-prepared composites were determined by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The characterization results showed that TiO2–RGO–PANI is mainly composed of Ti, O, C and N and their weight percentages are 67.68%, 21.57%, 10.70% and 0.05%, respectively, indicating that the TiO2–RGO–PANI composite catalyst has been successfully prepared and presents a poriferous coral structure. A series of electrochemical tests such as cyclic voltammetry tests declared that TiO2–RGO–PANI composite possessed a low limit of detection (LOD) (7.46 μM), good repeatability, selectivity and stability. In the concentration range of 10–180 μM, the hybrid presented linear diffusion, and the linear equation was Ipa = 0.21338 + 0.01392 (C/mM), the correlation coefficient R2 = 0.9912. In addition, the comparison of the merits of this proposed electrode with some recent nonenzymatic glucose sensors indicates that this highly sensitive TiO2–RGO–PANI complex glucose sensor provides a simple, low-cost, nonenzymatic method for glucose detection, and has promising applications in clinical diagnostics and medical analysis.
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