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Abstract£ºThe acetone£®sensing properties of the undoped and Pd doped perovskite-type oxides NdFeO£¬were investigated from room tem- perature to 400¡£C£®The perovskite-type NdFe01 was synthesized by a s01£®gel method£®and the dopants Pd with the content from lwt£¥to 5wt£¥were implanted into NdFe01 nanoparticles by thermal diffusion£®X£®ray diffraction(XgD)and scanning electron microscopy(SEM) techniques show that NdFe01 is an orthorhombic structure with the average particle size ofabout 40 nnl£®A giant acetone¡ªsensing response of 675£®7 is observed when the Pd content in NdFe01 powders is about 3wt£¥£®The response and recovery time ofthe sensor to the 5x101 ace£® tone gas are 16 and 1 s£¬respectively£®At the same time£¬it performs a good selectivity to acetone gas and may be a new promising material candidate for the acetone¡ªSensor development£® |
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phu_grassman: ½ð±Ò+5, thanks for your time. 2013-02-27 13:45:55
sltmac: ½ð±Ò+25, ·ÒëEPI+1, »¶Ó³£À´ 2013-03-25 08:47:00
phu_grassman: ½ð±Ò+5, thanks for your time. 2013-02-27 13:45:55
sltmac: ½ð±Ò+25, ·ÒëEPI+1, »¶Ó³£À´ 2013-03-25 08:47:00
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Abstract: The acetone-sensing properties of the undoped and Pd doped perovskite-type oxides NdFeO3 were investigated from room temperature to 400¡ãC. ·Ò룺 ÕªÒª£º ÎÒÃÇÑо¿ÁËδ²ÎÔÓºÍîÙ²ÎÔӵĸÆîÑ¿óÐÍÑõ»¯Îï NdFeO3 ´ÓÊÒÎÂÉýε½400¡æÏµĵıûÍªÆøÃôÌØÐÔ¡£ The perovskite-type NdFeO3 was synthesized by a sol-gel method, and the dopants Pd with the content from 1wt% to 5wt% were implanted into NdFeO3 nanoparticles by ·Ò룺ʹÓÃÈܽº - Äý½º·¨ºÏ³ÉÁ˸ÆîÑ¿óÐÍNdFeO3£¬²¢Í¨¹ýÈÈÀ©É¢ÏòNdFeO3ÄÉÃ×΢Á£ÖÐÖ²ÈëÁËÌí¼ÓÁ¿ÔÚ1wt% µ½5wt%µÄ²ôÔÓ¼ÁîÙµ½¡£ X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques show that NdFeO3 is an orthorhombic structure with the average particle size of about 40 nm. ·Ò룺ͨ¹ýX-ÉäÏßÑÜÉ䣨XRD£© ºÍɨÃèµç×ÓÏÔ΢¾µ£¨SEM £©¼¼ÊõµÄ¼ì²â½á¹û±íÃ÷NdFeO3ÊÇб·½¾§½á¹¹µÄ£¬Æ½¾ùÁ£¾¶Ô¼40nm ¡£ A giant acetone-sensing response of 675.7 is observed when the Pd content in NdFeO3 powders is about 3wt%. ·Ò룺µ±NdFeO3 ·ÛÄ©ÀïµÄîÙÌí¼ÓÁ¿ÔÚ3wt%µÄʱºò£¬¹Û²âµ½ÁËÒ»¸ö¾Þ´óµÄ±ûÍªÆøÃôÏìÓ¦ÖµÔÚ675.7¡£ The response and recovery time of the sensor to the 5¡Á10¨C4 acetone gas are 16 and 1 s, respectively. ·Ò룺´«¸ÐÆ÷¶ÔŨ¶ÈΪ5¡Á10¨C4µÄ±ûÍªÆøÌåµÄÏìÓ¦ºÍ»Ö¸´Ê±¼ä·Ö±ðÊÇ16sºÍ1s¡£ At the same time, it performs a good selectivity to acetone gas and may be a new promising material candidate for the acetone-sensor development. ·Ò룺ͬʱ£¬Ëü±íÏÖ³ö¶Ô±ûÍªÆøÌåµÄÁ¼ºÃµÄÑ¡ÔñÐÔ£¬²¢ÇÒÓÐÍû×÷Ϊһ¸öеIJÄÁÏÓÃÓÚ±ûÍªÆøÌå¼ì²âÔª¼þµÄ¿ª·¢¡£ »¶ÓÌá³öÐ޸Ľ¨Òé: ![]() ²Î¿¼ÎÄÏ×£ºhttps://wenku.baidu.com/view/9b4983d684254b35eefd344a.html |
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