초음파 및 수열처리법에 의한 ZnO/SnO2 센서의 저농도 VOC 감응특성

초록

The important factors in sensors are sensitivity, selectivity, and response time. Oxide semiconductors are high sensitivity, fast response and the advantage of miniaturization. Zn-doped SnO2 materials have been synthesized in order to improve the selectivity of the sensor. ZnO/ SnO2 crystals were prepared by a simple hydrothermal process and ultrasound pretreated hydrothermal process. ZnO/ SnO2 urchins were fabricated in the precursor solution with [Zn2+]:[Sn4+] ratio of 1:5 and rod structures were fabricated ratio of 1:1 and 1:3. Surface area ratio was increased by increasing the ratio of [Sn4+]. The sensitivity of sensors were highest at the [Zn2+]:[Sn4+] ratio of 1:5 in ethanol, acetaldehyde, toluene, and nitric oxide .

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