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以钨酸为前驱体,利用水热合成法制备出纳米三氧化钨粉体,通过透射电子显微镜(TEM)对合成产物进行了结构表征,前驱体钨酸的制备温度对纳米三氧化钨的形貌有较大影响,钨酸的制备温度为60℃时合成出具有纳米尺寸的菱形结构。比较不同条件下制备的纳米三氧化钨的气敏性能,随着乙醇和丙酮浓度的升高,它们的输出电压均呈现出上升的趋势,80℃下制备的钨酸水热合成的纳米三氧化钨不具有稳定的电压,具有菱形结构的纳米三氧化钨材料具备优异的气敏性能。
Tungstate was used as precursor to prepare nano-tungsten trioxide powder by hydrothermal synthesis method. The synthesized product was characterized by transmission electron microscopy (TEM). The preparation temperature of tungstic acid precursor was Appearance has a greater impact, the preparation of tungstic acid temperature of 60 ℃ when synthesized with nano-size diamond-shaped structure. Comparing the gas sensitivities of nano-tungsten trioxide prepared under different conditions, the output voltage of the nano-tungstic oxide shows a rising trend with the increase of the concentration of ethanol and acetone. The tungstic acid hydrothermally synthesized nano-trioxide Tungsten does not have a stable voltage, and the diamond-like nano-tungsten trioxide material has excellent gas-sensing properties.