火焰喷涂法制备用于气体传感应用的未掺杂氧化锌薄膜。

Flame-spray-made undoped zinc oxide films for gas sensing applications.

机构信息

Nanoscience Research Laboratory, Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.

出版信息

Sensors (Basel). 2010;10(8):7863-73. doi: 10.3390/s100807863. Epub 2010 Aug 23.

DOI:10.3390/s100807863

PMID:22163630

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3231166/

Abstract

Using zinc naphthenate dissolved in xylene as a precursor undoped ZnO nanopowders were synthesized by the flame spray pyrolysis technique. The average diameter and length of ZnO spherical and hexagonal particles were in the range of 5 to 20 nm, while ZnO nanorods were found to be 5-20 nm wide and 20-40 nm long, under 5/5 (precursor/oxygen) flame conditions. The gas sensitivity of the undoped ZnO nanopowders towards 50 ppm of NO(2), C(2)H(5)OH and SO(2) were found to be 33, 7 and 3, respectively. The sensors showed a great selectivity towards NO(2) at high working temperature (at 300 °C), while small resistance variations were observed for C(2)H(5)OH and SO(2), respectively.

摘要

采用溶解于二甲苯中的环烷酸锌作为前驱体，通过火焰喷雾热解法合成了未掺杂 ZnO 纳米粉末。在 5/5（前驱体/氧气）火焰条件下，得到的 ZnO 球形和六方颗粒的平均直径和长度在 5-20nm 之间，而 ZnO 纳米棒的宽度为 5-20nm，长度为 20-40nm。未掺杂 ZnO 纳米粉末对 50ppm 的 NO(2)、C(2)H(5)OH 和 SO(2)的气体灵敏度分别为 33、7 和 3。传感器在高温（300°C）下对 NO(2)表现出很强的选择性，而对 C(2)H(5)OH 和 SO(2)的电阻变化很小。