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A mechanism for enhanced photocatalytic activity of nano-size silver particle modified titanium dioxide thin films

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Science China(Technological Sciences) 2010年第11期53卷 3027-3032页

作者： MENG FanMing LU Fei sun zhaoqi LüJianGuo School of Physics and Materials Science Anhui UniversityHefei 230039China Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Dalian University of Technology)Ministry of EducationDalian 116024China Anhui Key Laboratory of Information Materials and Devices Anhui UniversityHefei 230039China Department of Physics and Electronic Engineering Hefei Normal UniversityHefei 230061China

Ag-TiO2 nanostructured thin films with silver volume fraction of 0–20% were deposited on silicon and quartz substrates by RF magnetron sputtering and annealed in ambient air at 950°C for 1 h. The phase structure and surface topography of the films were characterized by X-ray diffractometer and transmission electron microscope. Photocatalytic activity of the films was evaluated by light induced degradation of methyl orange (C14H14N3NaO3S) solution using a high pressure mercury lamp as lamp-house. The relation of photocatalytic activity and silver content was studied in detail. It was found that silver content influences phase structure of TiO2 thin films, and silver in the films is metallic Ag (Ag0). With increasing silver content from 0 to 20 vol%, photocatalytic activity of the films increases first and then decreases. A suitable amount (2.5–5 vol%) silver addition can significantly enhance the photocatalytic activity of TiO2 films. The enhanced photocatalytic activity was mainly attributed to the extension of visible light absorption region of the films, the presence of anatase phase, the increase of oxy-gen anion radicals O2? and reactive center of surface Ti3+, and the better separation between electrons and holes on the films surface.

关键词： silver nanoparticle TiO2 thin film photocatalytic activity RF magnetron sputtering methyl orange

淬火工艺对28MnCrMoRE油井管钢显微组织及硬度的影响

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金属热处理 2024年第8期49卷 160-165页

作者：孙昭琦李涛韩强张行刚白岩松高志敏内蒙古科技大学材料与冶金学院内蒙古包头014010 内蒙古包钢钢联股份有限公司内蒙古包头014010

以28MnCrMoRE钢油井管钢为研究对象,探究淬火工艺对深井油井管显微组织及硬度的影响。采用金相显微镜对淬火后原奥氏体晶粒进行观察,通过Image-ProPlus软件对原始奥氏体晶粒度进行统计;利用扫描电镜对淬火后的微观组织进行了观察及分析... 详细信息

以28MnCrMoRE钢油井管钢为研究对象,探究淬火工艺对深井油井管显微组织及硬度的影响。采用金相显微镜对淬火后原奥氏体晶粒进行观察,通过Image-ProPlus软件对原始奥氏体晶粒度进行统计;利用扫描电镜对淬火后的微观组织进行了观察及分析;利用洛氏硬度计进行硬度测试。结果表明,28MnCrMoRE钢分别经870、900、930℃保温30 min水淬后,原始奥氏体晶粒平均尺寸随淬火温度上升由8.21μm增大到12.67μm。当淬火温度为900℃,试验钢在保温90 min时原始奥氏体晶粒发生明显的异常长大;保温30 min时,原始奥氏体晶粒相对细小均匀且尺寸符合正态分布。28MnCrMoRE钢淬火组织为马氏体+贝氏体+残留奥氏体。随着淬火温度的升高或保温时间的延长,马氏体含量逐渐减少,组织有一定的粗化,试验钢的硬度先上升后下降,最大值为53.02 HRC。

关键词： 28MnCrMoRE钢油井管淬火工艺显微组织硬度

涤痰汤加减治疗脑缺血再灌注损伤机制研究进展

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山东中医杂志 2024年第6期43卷 651-657页

作者：孙兆祺徐晓玉刘志华河南中医药大学河南郑州450046 河南省中医院河南郑州450002

涤痰汤是治疗中风的经典名方,临床实践表明,涤痰汤对脑缺血再灌注损伤具有显著的改善作用。通过梳理相关文献,发现涤痰汤加减治疗脑缺血再灌注损伤的机制包括抑制氧化应激反应、减轻炎症反应、抑制兴奋性氨基酸毒性、抑制神经细胞凋亡... 详细信息

涤痰汤是治疗中风的经典名方,临床实践表明,涤痰汤对脑缺血再灌注损伤具有显著的改善作用。通过梳理相关文献,发现涤痰汤加减治疗脑缺血再灌注损伤的机制包括抑制氧化应激反应、减轻炎症反应、抑制兴奋性氨基酸毒性、抑制神经细胞凋亡、调节自噬等。这些机制共同作用,能有效保护神经元,减轻脑水肿和出血转化,改善神经功能缺损症状。在单药成分方面,各种药物主要成分的作用与涤痰汤复方的作用具有一致性。参考文献77篇。

关键词：涤痰汤脑缺血再灌注损伤氧化应激炎症反应兴奋性氨基酸毒性神经细胞凋亡自噬

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A facile hydrothermal preparation and photoluminescence study of ZnO micro/nanostructures on Zn foils

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Science China Chemistry 2011年第10期54卷 1547-1551页

作者： WU MingZai LU XiangHua LIU YanMei MA YongQing sun zhaoqi LIU XianSong ZHANG LiDe IAnhui Key Laboratory o fin formation Materials and Devices Anhui University HeJei 230039 China CAS Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China

ZnO micro/nanostructures with various morphologies were grown via hydrothermal etching of Zn *** the reaction temperature and time,rod-like,pencil-like,tube-like and flowerlike ZnO micro/nanostructures could be prepared directly on the Zn foil surface at temperatures 100-180℃ with excellent reproducibility.X-ray diffraction patterns indicated that these ZnO micro/nanostructures were *** mechanisms for the variation of morphology are ***,photoluminescence spectra of the as-grown samples revealed that all of them consist of UV emission band at around 392 nm.

关键词： crystal morphology hydrothermal photoluminescence

补阳还五汤联合醒脑开窍针刺对中风偏瘫患者认知功能和肢体功能的影响

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中医学报 2024年第8期39卷 1776-1780页

作者：朱会斌刘志华陈豪孙兆祺郭鑫河南中医药大学第二临床医学院河南郑州450002 河南中医药大学第二附属医院/河南省中医院河南郑州450002

目的:探讨补阳还五汤联合醒脑开窍针刺对中风偏瘫患者认知功能、肢体功能的疗效及安全性。方法:78例中风偏瘫患者根据入院单双日的顺序分为观察组(n=41)和对照组(n=37)。对照组给予补阳还五汤,观察组在对照组治疗基础上给予醒脑开窍针... 详细信息

目的:探讨补阳还五汤联合醒脑开窍针刺对中风偏瘫患者认知功能、肢体功能的疗效及安全性。方法:78例中风偏瘫患者根据入院单双日的顺序分为观察组(n=41)和对照组(n=37)。对照组给予补阳还五汤,观察组在对照组治疗基础上给予醒脑开窍针刺。治疗后比较两组患者认知功能、肢体功能。结果:治疗后,观察组中枢神经特异性蛋白水平显著低于同期对照组(t=8.617,P=0.006),脑源性神经营养因子水平显著高于同期对照组(t=10.390,P<0.001);观察组大脑前动脉、后动脉和基底动脉的血流速度均显著高于同期对照组(P<0.05);观察组行走不稳、肢体麻木、乏力等中医证候积分均显著低于对照组(P<0.05);观察组NIHSS得分显著低于同期对照组(t=15.961,P<0.001),MMSE评分显著高于同期对照组(t=8.256,P=0.002);观察组FMA评分和Barthel指数均显著高于同期对照组(t=8.290,P=0.009;t=6.055,P=0.043)。结论:补阳还五汤联合醒脑开窍针刺可有效改善中风偏瘫患者的认知功能和肢体功能,提高患者生活质量。

关键词：中风偏瘫补阳还五汤醒脑开窍针刺认知功能肢体功能

Interfacial thermal stability and electrical properties of AlOxNy/Si gate stacks grown by new CVD chemistry

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Interfacial thermal stability and electrical properties of A...

TFC'11全国薄膜技术学术研讨会

作者：何刚 zhaoqi sun Shiwei shi Xueping Song School of Physics and Materials Science Anhui Key Laboratory of Information Materials and DevicesAnhui University

Compared to other precursors,dimethylaluminumhydride [(CH)AlH,DMAH] has a high vapor pressure of 2 Torr at room temperature and the ability to form AlO films with low carbon contamination through a disproportionation ***,the low deposition temperature of DMAH effectively prevents the formation of low-k interfacial layers during CVD.

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Modification of electrical properties and carrier transportation mechanism of ALD-derived HfO2/Si gate stacks by Al2O3 incorporation

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Modification of electrical properties and carrier transporta...

安徽省第四届（2016年）“卓凌杯”真空科技青年创新大赛暨学术研讨会

作者： Juan Gao Gang He zhaoqi sun Dongqi Xiao School of physics and Materials Science Radiation Detection Materials & Devices Lab Anhui University School of Sciences Anhui University of Science and Technology

Effect of AlO incorporation on the electrical properties and carrier transportation of atomic-layer-deposited(ALD) Hf Al O high-k gate dielectrics on Si substrates have been investigated. Electrical analyses indicate that interfacial properties of Hf Al O/Si gate stack has been is improved and leakage current is reduced after AlO incorporation into HfO. Additionally,the Hf Al O/n-Si sample with precursor ratio of 4:2 exhibits the lowest interface charge density( D)of 3.6×10cme V, the lowest border trapped oxide charge density( N) of 2.4×10cm, the lower density of oxide charge( Q) of 0.9×10cm, and the lowest frequency dispersion of 0.15%. In addition, the carrier transportation mechanism for both HfO and HfAlO has been investigated systematically. Based on the analysis, it can be concluded that that Poole-Frenkle(P-F) emission is main conduction mechanism at the low electric field, and direct tunneling(D-T)dominates the conduction mechanism at the high field, respectively.

关键词： High-k gate dielectric Atomic-layer-deposition Electrical properties Carrier transportation mechanism Incorporation

Enhanced Photoelectronic Properties by CdS Nanoparticles Selectively Deposited on {101} Facets of Single Crystal TiO2 Nanosheet Array Films

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Enhanced Photoelectronic Properties by CdS Nanoparticles Sel...

安徽省第四届（2016年）“卓凌杯”真空科技青年创新大赛暨学术研讨会

作者： Lei Yang Miao Zhang Jianguo Lv Gang He zhaoqi sun School of Physics & Material Science Anhui University Army officer academy School of Electronic & Information Engineering Hefei Normal University

Single crystal TiO nanosheet array films with dominant {001} Facets were synthesized on FTO by a hydrothermal method. A simple strategy for the selective deposition of Cd S nanoparticles on the low energy {101} facets by controlling F content on the surface of Ti O2 nanosheets is developed. For CdS/TiO, under light irradiation, the photo-generated electrons flow from {001} to {101} facets,meanwhile, the photo-generated electrons transfer from Cd S nanoparticles to the TiO nanosheets. The deposition of Cd S nanoparticles on the {101} facets will shorten the path-ways that electron must travel. Herein, the synergistic effect of selective deposition of Cd S nanoparticles on the {101} facets of Ti O2 nanosheets combined with the different band edge positions of {001} and {101} facets, which would facilitate the spatial separation of electrons and holes on different facets, leading to enhanced photoelectronic performance.

关键词： TiO2 nanosheet array {101} facets Selective deposition CdS nanoparticles Photoelectronic property

Microstructure, Optical Properties and Catalytic Performance of Cu2O-modified ZnO Nanorods Prepared by Electrodeposition

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Microstructure, Optical Properties and Catalytic Performance...

安徽省第三届（2014年）“万瑞杯”真空科技青年创新大赛暨学术研讨会

作者： Xishun Jiang Miao Zhang Shiwei Shi Gang He Xueping Song zhaoqi sun School of Physics and Materials Science Anhui University

Cu2O-modified ZnO nanorods are prepared by two-step electrodeposition method on ITO substrates and the deposition time of Cu2O is 0, 1, 5 and 10 min, respectively. Field-emission scanning electron microscope(SEM) results indicate that Cu2O particles are embedded in the interspaces of the Zn O nanorods and the amounts of the Cu2O particles increase obviously when the deposition time lasts longer. X-ray diffractometer(XRD) shows that the peaks corresponding to Zn O nanorods and Cu2O particles are detected. UV-vis absorption spectra measurements have shown the band gaps of Zn O nanorods shift from 3.22 to 2.75 e V due to the introduction of Cu2O particles. X-ray photoelectron spectroscopy(XPS) measurement confirms that the sample contains Cu+ rather than Cu2+ or Cu. The MO concentration can be reduced to around 15% in 100 min with Cu2O electrodeposition time for 10 min.

关键词： Cu2O-modified ZnO nanorods Microstructure Optical properties Catalytic Performance