Preparation of macroporous SnO2 films using PMMA microspheres and their sensing properties to NOx and H2
نویسندگان
چکیده
Macroporous SnO2 (mp-SnO2(P-n); P means polymethylmethacrylate (PMMA) and n = diameter of PMMA microsphere) thick film gas sensors were fabricated by a modified sol-gel method by employing PMMA microspheres (n = 800, 400, 250 and 150 nm) as a template and SnCl2 as a tin source. Morphology of mp-SnO2 films was markedly dependent on the SnCl2 concentration and the diameter of PMMA microspheres. Especially, the ratio of the thickness of the SnO2 wall to the diameter of the hollow SnO2 microsphere seems to increase with decreasing the diameter of PMMA microspheres used.
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