| abstract |
The present invention provides a kind of based on novel ZnO nano column/SnO 2 Thin film detector and preparation method, the detector successively include substrate layer, SnO from bottom to up 2 Film layer, insertion SnO 2 The ZnO nano column of film layer, and it is coated on SnO 2 Pt quantum dot in film layer, ZnO nano column and the electrode that both ends are arranged in, the response time of the detector are 5-10s, can be detected simultaneously to ethyl alcohol, CO, NO gas, detection limit 5-10ppm.The present invention is applied widely, and ZnO nano column/SnO can be prepared on a variety of substrates 2 Thin film detector, detector prepared by the present invention contain ZnO and SnO simultaneously 2 Two kinds effectively detect material system, with the detection of two waveband selective light or simultaneously to two kinds of special gases progress selective enumeration methods；The detector includes simultaneously ZnO nanopillar array and SnO 2 Porous membrane is conducive to the sensitivity for improving detection. |