采用溶胶-凝胶法结合微波化学法制备了Ag-LaFeO3气敏材料。利用热分析（TG-DSC）、X射线衍射（XRD）以及傅里叶变换红外光谱法（FT-IR）对其进行了分析和表征。结果显示所制备的样品为正交钙钛矿结构,含有Ag和LaFeO3两种物相。气敏测试结果表明,当AgNO3与La（NO3）3的摩尔比为1：9时所制备的Ag-LaFeO3元件对1.0×10-6甲醛气体的灵敏度和选择性均优于其它摩尔比的元件,响应恢复时间均约为180s。
Formaldehyde gas-sensing properties of Ag-LaFeO3 prepared by sol-gel method combined with microwave chemical method were studied in this paper.The specimen powders were characterized by thermo-gravimetry-differential scanning calorimetry（TG-DSC）,X-ray diffraction（XRD） and Fourier transform infrared spectroscopy（FT-IR）.The results show that the phase of Ag-LaFeO3 powders including Ag and LaFeO3 are perovskite.The sensor of Ag-LaFeO3 synthesized from the AgNO3 and La（NO3）3 precursors with the molar ratio of 1∶9 shows the best sensitivity for 1.0×10-6 formaldehyde than the others.In addition,the response and recovery time are both about 180s.
参考文献
| [1] | 李艳莉,尹诗,黄宝妍.室内甲醛污染来源及其对人体的危害[J].佛山科学技术学院学报(自然科学版),2003(01):49-52,74. |
| [2] | 夏元洵.化学物质毒性全书[M].上海:上海科学技术文献出版社,1991 |
| [3] | GB50325-2001.民用建筑工程室内环境污染控制规范[S].,2002-1. |
| [4] | Li Shaofang;Li Fengping;Rao Zhiming .[J].Sensors and Actuators B:Chemical,2010,145(01):78-83. |
| [5] | Kudo, H.;Suzuki, Y.;Gessei, T.;Takahashi, D.;Arakawa, T.;Mitsubayashi, K. .Biochemical gas sensor (bio-sniffer) for ultrahigh-sensitive gaseous formaldehyde monitoring[J].Biosensors & Bioelectronics: The International Journal for the Professional Involved with Research, Technology and Applications of Biosensers and Related Devices,2010(2):854-858. |
| [6] | Hammerle, M;Hilgert, K;Achmann, S;Moos, R .Direct monitoring of organic vapours with amperometric enzyme gas sensors[J].Biosensors & Bioelectronics: The International Journal for the Professional Involved with Research, Technology and Applications of Biosensers and Related Devices,2010(6):1521-1525. |
| [7] | Zeng Wen;Liu Tianmo .[J].Physica B -Condensed Mat- ter,2010,405(05):1345-1348. |
| [8] | Li Benxia;Wang Yanfen .[J].Superlattiees and Micro- structures,2011,49(04):433-440. |
| [9] | 王育华,王为,余鸿燕,卢星河.柠檬酸配比对合成钙钛矿型LaNiO3催化剂结构的影响[J].现代化工,2006(z2):207-211,213. |
| [10] | 徐涛,范维涛,林毓韬,赵鹤云,朱忠其,张瑾,柳清菊.钙钛矿结构LaFe1-xMgxO3纳米粉体的甲醛气敏特性研究[J].功能材料,2010(08):1299-1301,1305. |
| [11] | Karlsson M;Matic A;Berastegui P;Borjesson L .Vibrational properties of proton conducting double perovskites[J].Solid state ionics,2005(39/40):2971-2974. |
| [12] | 余林;徐奕德;蔡晟 等.[J].催化学报,1996,17(01):22-27. |
| [13] | 程晓晶,梁柯丽,刘罡,宋娜.羧基氧桥连La（Ⅲ）四核配合物[C48H60La4O35]的合成和晶体结构[J].化学通报（印刷版）,2007(11):861-864. |
| [14] | 林生岭,印厚飞,陈传祥,朱炜锋,吴家建.聚苯胺/牛血清白蛋白/钙钛矿纳米复合材料的制备及表征[J].江苏科技大学学报（自然科学版）,2008(04):28-32. |
| [15] | 李熙 .钙钛矿型复合氧化物纳米晶固体材料的合成与性能的研究[D].吉林大学,1992. |
| [16] | 娄向东;沈荷生;沈瑜生.[J].传感器技术,1991(03):1-5. |
| [17] | Ling Chen;Shik Chi Tsang .Ag doped WO_3-based powder sensor for the detection of NO gas in air[J].Sensors and Actuators, B. Chemical,2003(1/2):68-75. |
| [18] | Davies R L;Etris S F .[J].Catalysis Today,1997,36(01):107-114. |
| [19] | 徐涛,范维涛,林毓韬,朱忠其,赵鹤云,柳清菊.Sr掺杂LaFeO3的微波化学制备及气敏性能的研究[J].功能材料,2010(09):1631-1634. |
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