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Synthesis,characterization and gas-sensing properties of Pd-doped SnO_2 nano particles 认领 引用 被引量：6
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作者 谭瑞琴 郭艳群 +3 位作者 赵俊华 李月 徐铁峰 宋伟杰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第7期1568-1573,共6页
SnO2 nano particles with various Pd-doping concentrations were prepared using a template-free hydrothermal method.The effects of Pd doping on the crystal structure,morphology,microstructure,thermal stability and surfa... SnO2 nano particles with various Pd-doping concentrations were prepared using a template-free hydrothermal method.The effects of Pd doping on the crystal structure,morphology,microstructure,thermal stability and surface chemistry of these nano particles were characterized by transmission electron microscope,X-ray diffractometer and X-ray photoelectron spectroscope respectively.It was observed that Pd-doping had little effect on the grain sizes of the obtained SnO2 nano particles during the hydrothermal route.During thermal annealing,Pd-doping could restrain the growth of grain sizes below 500℃ while the grain growth was promoted when the temperature increased to above 700℃.XPS results revealed that Pd existed in three chemical states in the as-synthesized sample as Pd^0,Pd^2＋ and Pd^4＋,respectively.Pd^4＋ was the main state which was responsible for improving the gas-sensing property.The optimal Pd-doping concentration for better gas-sensing property and thermal stability was 2.0%-2.5% （mole fraction）. 展开更多
关键词 SnO2 nano particles Pd-doping hydrothermal synthesis gas sensing property X-ray photoelectron spectroscopy
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热解法制备纳米SnO_2及其气敏性能研究 认领 引用 被引量：11
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作者 石娟 吴世华 +2 位作者 张守民 黄唯平 王淑荣 《高等学校化学学报》 SCIE EI CAS 北大核心 2004年第4期607-609,共3页
Nanosized SnO 2 powders were synthesized by using the direct pyrolysis means from SnC 2O 4 .The specimens were characterized by TEM, XRD, TG-DTA, FTIR and BET. TEM and XRD showed that the SnO 2 crystallines were less ... Nanosized SnO 2 powders were synthesized by using the direct pyrolysis means from SnC 2O 4 .The specimens were characterized by TEM, XRD, TG-DTA, FTIR and BET. TEM and XRD showed that the SnO 2 crystallines were less than 8 nm in diameter together with a narrow particle size distribution. BET showed that the surface area of SnO 2 was 115.2 m 2/g. FTIR spectra revealed that the absorptions of Sn—O and —OH bonds in SnO 2 ultrafine powders were red-shifted and broadened. According to the curve of TG-DTA, SnC 2O 4 transformed into SnO 2 completely after being calcined at 250 ℃. Further gas sensing experiments testified that the response and recovery times to C 2H 5OH were shorter than those obtained by the conventional precipitation method. 展开更多
关键词 纳米氧化锡 制备 热解法 气敏性能 电阻式气敏传感器
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SnO2/石墨分级纳米异质结构的合成及其电化学性能研究 认领 引用
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作者 栾照金 闫共芹 谈尚华 《人工晶体学报》 CAS 北大核心 2021年第8期1503-1510,共8页
以石墨为基底,五水合四氯化锡为锡源,氢氧化钠为沉淀剂,采用一步水热法合成了SnO2/石墨分级纳米异质结构。利用FESEM、XRD、EDS、Raman等对SnO2/石墨分级纳米异质结构进行了形貌、结构和成分表征。研究发现,结晶良好的SnO2纳... 以石墨为基底,五水合四氯化锡为锡源,氢氧化钠为沉淀剂,采用一步水热法合成了SnO2/石墨分级纳米异质结构。利用FESEM、XRD、EDS、Raman等对SnO2/石墨分级纳米异质结构进行了形貌、结构和成分表征。研究发现,结晶良好的SnO2纳米线首先组装成SnO2纳米棒,纳米棒进一步组装成直径约450 nm的花状结构,并均匀生长在石墨片上,呈现分级结构。用循环伏安法、恒流充放电循环法测试了分级纳米异质结构的电化学性能,结果表明:在50 mA/g的充放电电流密度下首次放电比容量和充电比容量分别为1567.2 mAh/g、825.9 mAh/g,同时多次循环的循环伏安曲线几乎一致,表明SnO2/石墨分级纳米异质结构具有较高的储电容量和改善的循环稳定性。 展开更多
关键词 水热合成 SnO2/石墨 分级纳米异质结构 电化学性能 循环稳定性
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CHARACTERIZATION OF LOW TEMPERATURE INTERNAL FRICTION AND MODULUS IN NANO SnO_2 SOLIDS 认领 引用
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作者 谢存毅 张立德 +3 位作者 朱震刚 胡源 陈祖耀 王秀梅 《Chinese Science Bulletin》 1992年第21期1790-1793,共4页
Ⅰ. INTRODUCTION As nanosolid is compacted from ultrafine particles, a large volume fraction of the material is constituted by grain boundaries or interfaces. Because of the small size and boundary effects, the proper... Ⅰ. INTRODUCTION As nanosolid is compacted from ultrafine particles, a large volume fraction of the material is constituted by grain boundaries or interfaces. Because of the small size and boundary effects, the properties of nanosolids are superior to those of the traditional materials with the same compositions. The gas sensing properties of"nano SnO2 solids are high sensitivity and rapid respgnding speed, which increase with the decrease of crystal grain size. 展开更多
关键词 Nano SnO2 solids internal friction modulus
气敏传感器的研究现状与发展趋势 认领 引用 被引量：17
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作者 贾良菊 应鹏展 +2 位作者 许林敏 倪自丰 王雅晴 《煤矿机械》 北大核心 2005年第4期3-5,共3页
传感器技术是现代检测和自动化技术的重要基础之一 ,它已深入到人类生活的各个领域。随着微电脑和微电子技术的日益普及和应用 ,对传感器的性能、数量及用途提出了新的需求 ,这就使人们更加重视对新型传感器的开发。
关键词 气敏传感器 SnO2 MEMS 纳米科技
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