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Gas Sensing Properties of ZnO Tetrapod-Like Whiskers Prepared by Hydrothermal Process

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稀有金属材料与工程 2006年第A3期35卷 185-187页

作者： Jiaqiang Xu Yuping Chen Huanxin Wang jianian shen College of Materials and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou 450002 China Institute of Materials Shanghai University Shanghai 200072 China

ZnO tetrapod-like whiskers were prepared through a hydrothermal process using zinc powder as raw material.Its microstructure and morphology were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The XRD results showed that the crystal structure of as-obtained sample can be indexed to hexagonal wurtzite ZnO.TEM results revealed that the ZnO sample took on tetrapod-like whisker shape.The gas sensors were prepared with the traditional sintering process and their gas sensitivities were detected.The test results of gas sensitivity showed that the sensors based on ZnO tetrapod-like whiskers are very sensitive to dilute ethanol vapor and H_2S.The relatively high sensitivity and selectivity of these sensors made from ZnO tetrapod-like whiskers demonstrated the potential for developing a new class of selective ethanol sensors.

关键词： hydrothermal process gas sensor zinc oxide whisker

Gasoline Sensor Based on Flower-Like ZnO

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稀有金属材料与工程 2006年第A3期35卷 106-109页

作者： Xu Jiaqiang Chen Yuping Li Chao shen jianian College of Materials and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou 450002 China Institute of Materials Shanghai University Shanghai 200072 China

Flower-like ZnO was prepared through a hydrothermal process using zinc sulfate as raw material.The microstructure and morphology of the samples were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM).XRD results showed that the as-obtained sample could be indexed to hexagonal wurtzite ZnO.TEM results revealed that the ZnO sample presented flower-like shape.The gas sensors were prepared with the traditional sintering process and their gas sensitivities were detected.The gas sensitivity results showed that the sensors based on flower-like ZnO were very sensitive to dilute 90~# gasoline.The relatively high sensitivity and selectivity of these sensors made from flower-like ZnO demonstrated the potential for developing a new class of selective gasoline sensors.

关键词： hydrothermal process gas sensor zinc oxide gasoline

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TiO_2光催化纳米薄膜的晶化处理

稀有金属材料与工程 2006年第1期35卷 92-95页

作者：张玉娟沈嘉年上海大学上海200072

TiO2光催化纳米薄膜在400℃~800℃温区内恒温退火1h^2h,以消除膜内非晶,提高薄膜光催化活性。热处理前后试样的检测结果表明:退火使TiO2薄膜内非晶晶化,晶粒长大,光响应电流增大。随退火温度的升高,TiO2薄膜出现由非晶→锐钛矿→金红石... 详细信息

TiO2光催化纳米薄膜在400℃~800℃温区内恒温退火1h^2h,以消除膜内非晶,提高薄膜光催化活性。热处理前后试样的检测结果表明:退火使TiO2薄膜内非晶晶化,晶粒长大,光响应电流增大。随退火温度的升高,TiO2薄膜出现由非晶→锐钛矿→金红石的转变。其中,600℃退火1h的TiO2薄膜为锐钛矿加金红石的混晶结构,光电流密度最大IUV=41.2A/m2,光催化活性最好。

关键词： TiO2光催化纳米薄膜晶化处理锐钛矿光催化活性

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海塔盆地中部断陷带烃源岩分布、特征与评价

地质科学 2011年第4期46卷 994-1008页

作者：申家年陈景跃苗月东北石油大学地球科学学院黑龙江大庆163318

运用地球化学数据结合地质研究成果,重点介绍了海塔盆地中部断陷带下白垩统铜钵庙组—南屯组二段泥岩的基本地球化学指标和发育情况。泥岩中有机质丰度普遍较高,从下部的铜钵庙组到上部的南屯组二段有机质丰度平均值有逐步增加的趋势,... 详细信息

运用地球化学数据结合地质研究成果,重点介绍了海塔盆地中部断陷带下白垩统铜钵庙组—南屯组二段泥岩的基本地球化学指标和发育情况。泥岩中有机质丰度普遍较高,从下部的铜钵庙组到上部的南屯组二段有机质丰度平均值有逐步增加的趋势,有机质类型Ⅲ、Ⅱ_2、Ⅱ_1型比例相当,少部分为Ⅰ型,Ⅰ型主要集中在特殊岩性段和南一段上部。铜钵庙组主要分布于乌尔逊凹陷,复合旋回段泥岩则主要分布于乌尔逊和贝尔凹陷,从特殊岩性段开始泥岩全区分布,暗色泥岩比例和泥地比较前期明显增加,有机质丰度和I型有机质比例也同步增加,因此特殊岩性段时期开始了海塔盆地中部断陷带烃源岩的广泛发育期。综合泥岩有机质丰度、类型、成熟度及其分布分析认为,研究区内有生烃能力的泥岩集中在下白垩统的南屯组,最好的烃源岩发育于被动裂谷期、辫状河三角洲和滨浅湖环境较为发育的特殊岩性段;这也同时说明好的烃源岩的形成并不一定要求深湖一半深湖环境,在一定的盆地背景条件下,辫状河三角洲和滨浅湖环境同样可以形成好的烃源岩。

关键词：有机质丰度类型成熟度深湖-半深湖环境海塔盆地

GAS SENSITIVE PROPERITIES OF INDIUM OXIDE NANOCRYSTALS SYNTHESIZED BY CHEMICAL PRECIPITATION

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GAS SENSITIVE PROPERITIES OF INDIUM OXIDE NANOCRYSTALS SYNTH...

Noble Metal-Doped In2O3 for Enhancing Response to H2

第二届国际传感器科学研讨会

作者： Jiaqiang XU Yuping CHEN jianian shen and Ping HUCollege of Material and Chemical Engineering Zhengzhou University of LightIndustry Zhengzhou Henan 450002 ChinaInstitute of Materials Shanghai University Shanghai 200072 ChinaZhengzhou College of Animal Husbandry Engineering Zhengzhou450011 China

＜正＞ Semiconductor metal oxides as chemical sensing materials have been extensively studied for a long time due to their advantageous features, such as good sensitivity to the ambient conditions and simplicity in fabrication. Among them, ln2O3 has been found to have a pronounced sensitivity to such gases as C2H5OH, O3, NOX, NH3, CO, H2, and other species, its characteristics depend strongly on the conditions of their preparative process, which determine the structure, phase composition and indium electronic states in the sensing material. In this paper, we report our results using

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稀有金属材料与工程 2006年第S3期 136-139页

作者： Jiaqiang Xu~(1,2) Xiaohua Wang~1 jianian shen~2 (1.College of Materials and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China) (2.Institute of Materials,Shanghai University,Shanghai 200072,China)

Nanocrystalline In2O3was synthesized through a controllable solvothermal process in one-step at 210℃for 24 h. Gas sensing properties were tested by mixing gas in air in static state.At 268.5℃,the nanocrystal showed high sensitivity to LPG but lower sensitivity to H2and CO.In order to enhance the sensitivities to H2and CO,0.5 mass % Au and Pd were doped by an impregnation process.The sensitivities to H2and CO were increased under different working temperature.Au-doped In2O3was superior to Pd-doped In2O3whatever to H2or CO;the sensitivity was increased with the increase of working temperature;gas sensing properties to H2overmatched to CO.

关键词： solvothermal process indium oxide noble metal H2 sensor

Gasoline Sensor Based on Rare Earth-Doped Indium Oxide with Low Power Consumption

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Journal of Rare Earths 2006年第3期24卷 319-319页

作者： Xu Jiaqiang Wang Xiaohua Wang Huanxin shen jianian College of Materials and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou 450002. China Institute of Materials Shanghai University Shanghai 200072 China

Nanocrystalline indium oxide powders were prepared by microemulsion and then Y2O3 and Nd2O3 doped In2O3 were synthesized separately by impregnation and chemical co-deposition. The structure and morphology were characterized by XRD and TEM, respectively. Gas sensing properties were tested at static state. The results show that homogeneous indium oxide nanopowder with main grain size of 20 nm can be obtained from microemulsion after sintered at 600 ℃ for 1 h. Pure indium oxide gas sensor has higher sensitivity to gasoline than that to ethanol, HCHO, C6H6, NH3, C4H10, but the selectivity is not as well as sensitivity.

关键词： nanosized In2O3 micromulsion gas sensor yttrium oxide neodymium oxide rare earths

两种不锈钢在模拟消声器环境中的电偶腐蚀行为

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中国腐蚀与防护学报 2015年第3期35卷 233-238页

作者：魏强李谋成沈嘉年上海大学材料研究所上海200072

采用氧化/冷凝液浸泡循环实验方法模拟汽车消声器内部环境,研究了409和304两种不锈钢在冷凝液中的电偶腐蚀行为。结果表明,无氧化作用时两种不锈钢间电偶腐蚀效应较弱,304钢对409钢的加速腐蚀作用很小。循环实验过程中,偶合电位较低时... 详细信息

采用氧化/冷凝液浸泡循环实验方法模拟汽车消声器内部环境,研究了409和304两种不锈钢在冷凝液中的电偶腐蚀行为。结果表明,无氧化作用时两种不锈钢间电偶腐蚀效应较弱,304钢对409钢的加速腐蚀作用很小。循环实验过程中,偶合电位较低时偶合电流密度往往较大。热氧化将明显增大两种不锈钢发生电偶腐蚀的倾向性,但氧化温度为250℃时稳定偶合电流密度较小、电偶腐蚀效应不显著,而氧化温度为400℃时409钢在循环过程中将发生局部腐蚀,呈现出较大的偶合电流密度,电偶腐蚀效应较强。

关键词：汽车排气系统消声器不锈钢电偶腐蚀冷凝液腐蚀

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重力流沉积岩相划分及其发育规律

中国石油大学学报（自然科学版） 2015年第1期39卷 17-24页

作者：张雷李振海张学娟刘敏申家年东北石油大学地球科学学院黑龙江大庆163318 德克萨斯农机大学地质与地球物理系美国德克萨斯州大学城77840 湖南省地质科学研究院湖南长沙410007

在Tailling等分类的基础上建立基于沉积过程中的流变学特征和沉积物支撑机制的滑塌流-浊流-碎屑流三分(滑塌岩相、碎屑流岩相和浊积岩相)14个序列的重力流岩相划分体系;结合鄂尔多斯盆地合水地区长7段大量的岩心资料,并借助于测井曲线... 详细信息

在Tailling等分类的基础上建立基于沉积过程中的流变学特征和沉积物支撑机制的滑塌流-浊流-碎屑流三分(滑塌岩相、碎屑流岩相和浊积岩相)14个序列的重力流岩相划分体系;结合鄂尔多斯盆地合水地区长7段大量的岩心资料,并借助于测井曲线和录井数据,对合水地区长7段重力流沉积的岩相及岩相组合进行识别。结果表明:合水地区主要发育5类重力流沉积岩相组合类型,即低密度浊流组合、高密度浊流组合、黏滞性碎屑流组合、弱黏滞性碎屑流组合以及滑塌岩组合;对比合水地区重力流沉积空间发现,滑塌岩相发育范围相对局限,主要发育于三角洲前缘失稳区,碎屑流沉积主要发育于斜坡带-坡折带处,浊流沉积的分布范围最广;'浅水凸形'坡折带位于三角洲前缘或三角洲平原附近,是重力流重要的触发区,主要控制正常牵引流三角洲前缘中松散的水下分流河道砂体沉积;'深水凹形'坡折带位于前三角洲深水区,是深水重力流砂体主要的卸载沉积区。

关键词：鄂尔多斯盆地长7段重力流沉积岩相岩相组合