Study of the synthesis and Cl2 gas-sensing properties of nanometer HNO3-doped SnO2 |
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| Authors: | Xiao-bing WangNan Qin Tian-jun LouXiang-dong Lou |
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| Institution: | a College of Chemistry and Environmental Science, Henan Key Lab. for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, China
b College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan 453003, China |
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| Abstract: | We focused on the effects of the inorganic acid HNO3 on the gas-sensing properties of nanometer SnO2 and prepared the powders via a dissolution-pyrolysis method. Furthermore, the powders were characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM), field emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectra (EDS). Several aspects were surveyed, including the calcining temperature, concentration of nitric acid and the working temperature. The results showed that the gas response of 3 wt% HNO3-doped SnO2 powders (calcined at 500 °C) to 10 ppm Cl2 reached 316.5, at the working temperature 175 °C. Compared with pure SnO2, appropriate HNO3 could increase the gas sensitivity to Cl2 gas more significantly. |
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| Keywords: | HNO3-doped Dissolution-pyrolysis SnO2 Gas-sensing property |
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