The preparation and gas sensitivity study of polypyrrole/zinc oxide |
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| Affiliation: | 1. Department of Chemistry, Hebei Normal University, Shijiazhuang 050016, People''s Republic of China;2. Department of Chemistry, Nankai University, Tianjin 300071, People''s Republic of China;1. Institute of Physics, National Academy of Sciences of Ukraine, 46, pr. Nauki, 03028 Kyiv, Ukraine;2. F. Skorina Gomel State University, Sovetskaya 104, Gomel 246019, Belarus;3. JSC “INTEGRAL”, Kazintsa 121A, Minsk 220108, Belarus;4. Institute for Problems of Materials Science, NAS of Ukraine, Krjijanovskogo 3, 03142 Kyiv, Ukraine;1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China;2. Guangxi Collaborative Innovation Center of Structure and Property for New Energy Materials, Guilin 541004, PR China;3. Guangxi Experiment Center of Information Science, Guilin University of Electronic Technology, Guilin 541004, PR China;1. Solid State Physics Department, University of Mazandaran, Babolsar, Iran;2. Basic Sciences Department, Mazandaran University of Science and Technology, Babol, Iran;1. Functional Materials Research Laboratory, School of Physical Sciences, Solapur University, Solapur 413255, MS, India;2. Department of Materials Science and Engineering, Chonnam National University, Gwangju, Republic of Korea;3. Department of Physics, Shivaji University Kolhapur, Kolhapur, India;1. School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China;2. Institute of Environment and Health, Jianghan University, Wuhan, 430056, China;3. College of Information Science and Engineering, Ningbo University, Ningbo, 315211, China;4. Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, 315201, China;1. Department of Photonics, National Cheng Kung University, Tainan, 701, Taiwan, ROC;2. MS Degree Program on Nano-Integrated Circuit Engineering, Department of Electrical Engineering, National Cheng Kung University, Tainan, 701, Taiwan, ROC;3. Department of Electrical Engineering, Yuan Ze University, Taoyaun, 320, Taiwan, ROC |
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| Abstract: | Polypyrrole (PPy) was prepared by chemical oxidation polymerization, analyzed by FT-IR, elemental analysis and HRTEM, and studied for gas sensitivity. It suggested that PPy had sensitivity to NH3, H2S and NOx, and showed irreversibility to NOx gas. The organic–inorganic hybrid materials PPy/ZnO with different PPy weight percents were prepared by mechanical mixing, and the sensitivity study of the materials to toxic gases NH3, H2S, NOx was carried out at different operating temperatures 30, 60, and 90 °C. It was found that PPy/ZnO materials (PPy(1%)/ZnO, PPy(3%)/ZnO, PPy(5%)/ZnO, PPy(10%)/ZnO, PPy(20%)/ZnO) had better selectivity and reversibility to NOx than pure PPy, and much lower working temperature than the reported working temperature of ZnO (about 350–450 °C). Their sensitivity increased with the increasing concentration of NOx at particular working temperature, and among them PPy(10%)/ZnO had the maximum sensitivity to NOx in the same condition. They showed no response to 1000, 1500, 2000 ppm NH3 or H2S. The response mechanism of PPy/ZnO materials to NOx was discussed. |
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