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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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Abstract: The acetone-sensing properties of the undoped and Pd doped perovskite-type oxides NdFeO3

were investigated from room temperature
to 400¡ãC.
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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.
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