Cu掺杂WO_3纳米棒的制备及其对正丁醇的气敏响应

Synthesis of Cu-doped WO_3 Nanorods and Its Response of n-Butanol Gas Sensing Performance

通过水热法简易的制备出Cu掺杂WO_3纳米棒材料,并运用XRD、SEM、BET等手段对其物相、形貌和比表面积等进行了表征,并研究了其对正丁醇的气敏性能。气敏测试结果表明,所制备的Cu掺杂WO_3纳米棒材料对正丁醇具有良好气敏性能。当工作温度为400℃时,Cu掺杂WO_3材料对100ppm的正丁醇的响应达到了29,约为纯WO_3的3倍。同时,Cu掺杂WO_3材料对正丁醇的检测限可低至0.1ppm,并且对正丁醇还具有良好的选择性。最后对所制备的Cu掺杂WO_3材料进行了气敏机理解释。

Pure and Cu-doped WO3 nanorods were synthesized simply by the hydrothermal method. The structure,morphology and specific surface area of the as-prepared producst were characterized by XRD,SEM and BET. The performance of the Cu-doped WO3 nanorods sensor to n-butanol was investigated. At the operating temperature of 400 ℃,the response of Cu-doped WO3 nanorods to 100 ppm n-butanol is 29,which is almost 3 times higher than that of pure WO3 nanorods. Meanwhile,the practical detection limit attained to n-butanol as low as 0. 1 ppm. Besides,the Cu-doped WO3 sensor exhibited good selectivity to n-butanol and excellent long-term stability. The mechanism of the Cu-doped WO3 nanorods gas sensing is also proposed.