检索结果-内蒙古大学图书馆

Effect of hydrolysis modifier on the properties of ATO films prepared by spin coating

2012 Workshop on Inorganic Thin Films and Coatings

作者： Galaviz-Pérez, J.A. Chen, Fei Shen, Qiang Vargas García, J.R. Zhang, Lianmeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Dept of Materials and Metallurgical Eng. National Polytechnic Institute Mexico 07300 DF Mexico

ISBN: (纸本)9783037855669

ATO thin films have been successfully prepared by the spin coating method using an ethanol solution of SnCl4·5H2O and SbCl3 using acetylacetone as hydrolysis modifier. ATO films from 1 to 6 layers were prepared at 300 °C as densification temperature and within an annealing temperature ranging from 450 °C to 750 °C. Films exhibited the cassiterite crystalline phase and morphology consisted in nanoparticles of about 10 nm in diameter. Acetylacetone content as well the addition of water affected the particle size and morphology, decreasing particle size and the appearance of voids. Films prepared at an acetylacetone ratio of 4 with no addition of water exhibited an optical transparency above 90% from 380 to 800 nm while resistivity was 7.99 ×10-3 Ω·cm. The effect of the hydrolysis modifier on the electric properties, morphology, optical transparency and microstructure has been studied. © (2013) Trans Tech Publications, Switzerland.

关键词： Hydrolysis

来源：评论

学校读者我要写书评

暂无评论

synthesis and characterization of three-dimensional (3D) flowerlike CuO by a simple chemical reduction method

引用

2013 3rd International Conference on Mechanical Science and Engineering, ICMSE 2013

作者： Xiang, Kun Li, Mei Juan Gong, Dao Ren Luo, Guo Qiang Shen, Qiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of science Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Opto-electrical Products Inspection Yangzhou 225009 China

ISBN: (纸本)9783037857120

Three-dimensional (3D) flowerlike CuO structures were prepared successfully by reducing copper chloride (CuCl2 2H2O) aqueous solution in the presence of cetyltrimethylammonium bromide (CTAB). The as-prepared CuO structures were characterized by UV-Vis, X-ray powder diffraction (XRD), FESEM and EDS techniques. The flowerlike CuO structures consisted of Salix leaf-like nanostructures. A possible growth mechanism for the formation of 3D flowerlike CuO structure was proposed. The processes of ripening and directed growing of nanoparticles were most important factors to obtain the 3D flowerlike CuO structures. © (2013) Trans Tech Publications, Switzerland.

关键词： Copper oxides

来源：评论

学校读者我要写书评

暂无评论

Nanocrystalline antimony-doped tin oxide films prepared by sol-gel

Nanocrystalline antimony-doped tin oxide films prepared by s...

引用

8th Pacific Rim International Congress on advanced materials and processing 2013, PRICM 8

作者： Galaviz-Pérez, J.A. Chen, Fei Shen, Qiang Vargas-García, J.R. Zhang, Lianmeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Dept. of Materials and Metallurgical Eng. National Polytechnic Institute Mexico 07300 DF Mexico

ISBN: (纸本)9781632660008

Antimony-doped tin oxide films were prepared by sol-gel technique from an ethanolic solution of SnCl4.5H2O and SbCl3. The effect of the addition of acetylacetone as a hydrolysis modifier was investigated. Structural, optical and electrical properties of the films were studied by XRD, FESEM, TEM, FTIR, UV-vis, TG and Hall effect measurements. TEM results showed that antimony-doped tin oxide films consist of well-crystallized grains ranging from 5 to 10 nm. It was found that the addition of the acetylacetone influences positively the film properties. The appropriate addition of acetylacetone allowed for the preparation of films with an optical transmittance as high as 97% in the visible region and 47% at 200 nm. Highly transparent films prepared in this study exhibit an electrical resistivity of 10-3 Ω cm which make them attractive for photovoltaic cell applications.

关键词： Chlorine compounds

来源：评论

学校读者我要写书评

暂无评论

Solvent‐Driven Chiral‐Interaction Reversion for Organogel Formation†

引用

Angewandte Chemie 2014年第8期126卷

作者： Guangyan Qing Xingxing Shan Wenrui Chen Ziyu Lv Peng Xiong Taolei Sun State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 (P.R. China)

For chiral gels and related applications, one of the critical issues is how to modulate the stereoselective interaction between the gel and the chiral guest precisely, as well as how to translate this information into the macroscopic properties of materials. Herein, we report that this process can also be modulated by nonchiral solvents, which can induce a chiral‐interaction reversion for organogel formation. This process could be observed through the clear difference in gelation speed and the morphology of the resulting self‐assembly. This chiral effect was successfully applied in the selective separation of quinine enantiomers and imparts “smart” merits to the gel materials.

关键词： Chirale Erkennung Chirale Gele Lösungsmitteleffekte Selbstorganisation Wirt‐Gast‐Systeme

来源：评论

学校读者我要写书评

暂无评论

Performance comparison between series-connected and parallel-connected thermoelectric generator systems

Performance comparison between series-connected and parallel...

引用

2nd International Conference on Intelligent materials, Applied Mechanics and Design Science, IMAMD 2013

作者： Wang, Yin Tao Liu, Wei Fan, Ai Wu Li, Peng School of Energy and Power Engineering Huazhong University of Science and Technology 1037 Luoyu Road Wuhan China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing 122 Luoshi Road Wuhan China

ISBN: (纸本)9783037857175

The connections between the thermoelectric modules are crucial importance for the performance of the thermoelectric power system. Many studies have been done to improve the output of thermoelectric system, but very little specific to the connections between the modules. A mathematical model of a module has been established, and based on this model, the performance of two systems composed of 6 pieces of thermoelectric modules, one in series connection and the other in parallel connection, is simulated with MATLAB software and then compared. The results can be used as reference for the design and prediction of thermoelectric system. © (2013) Trans Tech Publications, Switzerland.

关键词： MATLAB

来源：评论

学校读者我要写书评

暂无评论

Effect of yttria content on phase stability and grain growth in Y2O3-ZrO2 coupling MgAl2O4 dispersed phase

Effect of yttria content on phase stability and grain growth...

引用

中国颗粒学会超微颗粒专委会2013年年会暨第八届海峡两岸超微颗粒学术研讨会

作者： Zhen Gao Gang-Qin Shao Jian Li Bin Li Juan-Juan Yu Wei Cai Jin-Long Sun Xiao-Hua Yu State Key Laboratory of Advanced Technology for Materials Synthesis & Processing Wuhan University of Technology

The tetragonal yttria-stabilized zirconia polycrystal coupling Mg Al2O4(3YTZP-30vol.%Mg Al2O4)exhibited the best high-strain-rate superplasticity in the binary systems,but few investigation had aimed

关键词： Composite materials Chemical synthesis Microstructure Phase equilibria

来源：评论

学校读者我要写书评

暂无评论

Shielding Effectiveness of Composites Containing Flaky Inclusions

引用

高电压技术 2013年第8期39卷 1995-1999页

作者： WANG Qingguo QU Zhaoming WANG Yilong Institute of Electrostatic & Electromagnetic Protection Mechanical Engineering College Shijiazhuang 050003 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

To investigate the quantitative relationship between the electromagnetic-shielding property of composites and the distribution of inclusions, a scheme for predicting the shielding effectiveness of composites containing variously-distributed flaky inclusions is proposed. The scheme is based on equivalent parameters of homogeneous comparison materials and the plane-wave shielding theory. It leads to expli- cit formulas for the shielding effectiveness of multi-layered composites in terms of microstructural parameters that characterize the shape, distribution and orientation of the inclusions. For single layer composite that contains random and aligned flaky silver-coated carbonyl-iron particles with fractions of different volume, the predicted shielding effectiveness agrees well with the experimental data. As for composites containing aligned flaky particles,the shielding effectiveness obtained by the proposed scheme and experiment data is higher than that the random case, e.g. about 20 dB higher at 750 MHz. The proposed scheme is a straightforward method for optimizing future composite de- signs.

关键词：多层复合材料屏蔽效能夹杂物片状微观结构参数实验数据羰基铁粒子电磁屏蔽

来源：评论

学校读者我要写书评

暂无评论

synthesis and applications of hierarchically porous catalysts

引用

Chinese Journal of Catalysis 2013年第1期34卷 22-47页

作者： Li, Xiaoyun Sun, Minghui Rooke, Joanna Claire Chen, Lihua Su, Bao-Lian State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China 61 rue de Bruxelles B-5000 Namur Belgium Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW United Kingdom

Hierarchically porous materials that can be used as catalysts or catalyst supports have garnered much attention due to their enhanced mass transport and multiple functionalities. Hierarchically porous catalysts integrate at least two levels of porosity and present the advantages associated with each level of porosity, from selectivity to mass transport. For example, hierarchically porous zeolites offer an effective solution to the mass transport problem associated with conventional zeolites in catalyzed reactions, because they combine the catalytic features of micropores and the improved accessibility and increased molecular transport related to the addition of several porosities within a single body. This review thoroughly summarizes recent developments that have been made in the field of hierarchically porous catalysts, with the main focus on the synthesis strategies that are available as well as their application in catalysis. It is the intent of this work to stimulate intuition into the optimal design of related hierarchically porous catalysts with desired characteristics. © 2013 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences.

关键词： Porosity

来源：评论

学校读者我要写书评

暂无评论

Gas Sensing Properties of Ultralong MoO3 Nanobelts for Ethanol Gas

Gas Sensing Properties of Ultralong MoO3 Nanobelts for Ethan...

引用

International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)

作者： Shuang Yang Yueli Liu Wei Jin Wen Chen Tingqiang Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering Wuhan University of Technology

As a layered-structure semiconductor material with wide band gap, MoO 3 has been considered to be a promising candidate for application in gas sensor. Recently, gas sensor based on MoO 3 have been found to have a response towards various gases such as H 2 S, NO 2 , NH 3 , trimethylamine, formaldehyde and H 2 in the temperature range of 300–600 °C. Although MoO 3 films and nanorods are not sensitive to ethanol gas, it is found that the ultralong MoO 3 nanobelts have a good sensitivity and selectivity to ethanol gas in our works. In the present work, the ultralong MoO 3 nanobelts are prepared by hydrothermal method using a molybdenum organic salt precursor. The nanobelts are flexible with an average length of 200-300μm and width of 500nm, which won’t be broken even after bended or distorted. The nanobelts are characterized by using X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and Raman spectra. Gas sensor based on ultralong and flexibility MoO 3 nanobelts is then fabricated. The sensor shows a good sensitivity towards ethanol gas, while almost no response towards other reducing gases, such as ammonia and formaldehyde in the temperature range of 220–380 ℃, the detection limit to ethanol gas may reach to 5ppm at the temperature of 380℃, which indicates that this kind of sensor has a promising future for ethanol detection. In conclusion, a gas sensor has been fabricated based on ultralong and flexibility MoO 3 nanobelts, which are prepared by hydrothermal method using a molybdenum organic salt precursor, and it is sensitive to ethanol gas. The reason for the good sensitivity to ethanol may be due to the large specific surface area, axial electron transfer and the non-stoichiometry of MoO 3 nanobelts.

关键词： Ultralong MoO 3 Nanobelts, Hydrothermal method, Gas Sensing Property, Ethanol gas

来源：评论

学校读者我要写书评

暂无评论

Single-nanowire solar cells based on the surface-passivated CdS/Ag2S core-shell heterostructures

Single-nanowire solar cells based on the surface-passivated ...

引用

International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)

作者： Keqiang Chen Yueli Liu Zhuoyin Peng Yuqing Cheng Wen Chen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering Wuhan University of Technology

Single-nanowire solar cells have been considered to be the promising candidates as the nanoelectronical and flexibledevices, as they possess large surface-to-volume ratio and short minority carrier’stransferring path. Recently, there is some kinds of heterostructures are used to fabricated single-nanowire solar cells, such as CdS/Cu 2 S, CuInSe 2 /CdS. Among them, cadmium sulfide （CdS） and silver sulfide （Ag 2 S） have been attracted much attention for excellentoptoelectronic property, and surface-passivated is an important process to improve the efficiency. Till now, there is few works focused on the influence of the surface-passivated layer on the photovoltaicefficiency of the CdS/Ag 2 S core-shell single-nanowires solar cells. Herein, CdS nanowires were synthesized via vapor liquid solid（VLS） method, which is used as the core structure. To obtain CdS/Ag 2 S core-shell structure, cation exchange was carried out through mixing CdS solution with AgNO 3 solution.A ZnS passivation layer with the thickness of 0nm was achieved by chemical bath deposition （CBD） process. The single CdS/Ag 2 S core-shell nanowires were separated individually on the regular Au pattern fabricated by the photolithography technique, and then two ends of the nanowires were well contacted with Au electrodes by using the electron beam lithography. X-raydiffraction, SEM, X-ray spectroscopy and TEM techniques were used to character the microstructure, morphology and combining chemical state. The fabricated single-nanowire solar cells were irradiated under AM 1.5G illumination, an efficiency improvement from 1.8% to 2.4%was achieved due to the preventing charge carriers from reaching the surface by surface-passivated layer. In conclusion, CdS/Ag 2 Sheterostructures had been successfully prepared by cation exchange method, achieving an efficiency enhancement by forming the surface-passivated single-nanowire solar cells.

关键词： CdS/Ag 2 Sheterostructure cation exchange single-nanowire solar cells surface-passivated photovoltaicefficiency.

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：