TIO2 ANATASE THIN-FILMS AS GAS SENSORS
TIO2 ANATASE THIN-FILMS AS GAS SENSORS
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DOI：
10.1016/0925-4005(94)01559-z
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发表时间：
1995-05-01
影响因子：
8.4
通讯作者：
LEVY, F
中科院分区：
文献类型：
--
作者：
TANG, H;PRASAD, K;LEVY, F
锐钛矿改性的TiO2表现出与广泛研究和使用的金红石相截然不同的性能。我们研究了钛矿型TiO2薄膜在300 ~ 400℃的氧化性和还原性气体（O-2、H-2和乙醇）下的耐化学性能。未掺杂的钛矿型薄膜对乙醇和氢气都有明显的快速反应。高电子迁移率和低密度的俘获中心或补偿中心被认为是这种良好响应的原因。在锐钛矿薄膜中掺入Sr、Ce、Y和Tb使其对氢不敏感，但对乙醇仍然敏感。测量并分析了掺杂剂对灵敏度及其动力学的影响。
The anatase modification of TiO2 shows properties quite different from those of the extensively studied and used rutile phase. We have investigated the chemi-resistive behavior of anatase TiO2 thin films exposed to oxidizing and reducing gases (O-2, H-2 and ethanol) in the temperature range between 300 and 400 degrees C. The undoped anatase films demonstrate significant and rapid response to ethanol as well as an appreciable response to hydrogen. The high electron mobility and the low density of trapping or compensating centers are considered to have contributed to this good response. Doping the anatase thin films with Sr, Ce, Y and Tb makes them insensitive to hydrogen, but still sensitive to ethanol. The modification of the sensitivity and its dynamics by dopants have been measured and analyzed.