摘要：结合泡沫吸收塔除尘原理和雾滴湍流冲击原理等多种粉尘捕集原理,自制一种新型纳米粉尘湿法捕集装置,可对空气中纳米粉尘进行有效采集。对装置的采集原理及各部件进行了深入分析和详细介绍。根据绘制的纳米TiO₂吸光度与浓度的工作曲线,应用分光光度法测定捕集液中纳米TiO₂粉尘的浓度,进而准确掌握被采集区域空气中纳米TiO₂粉尘的浓度。分别用纳米粒度仪和电子显微镜对装置采集到的纳米TiO₂粉尘与实际生产纳米TiO₂产品进行表征,结果发现两者在粒度分布和形貌等方面均表现出很好的一致性。

关键词：纳米粉尘；捕集装置；湿法

Abstract：The foam capture theory of dust tower and onflow fogdrop im-paction principle were employed and combined to develop a sampling de-vice for nanometer aerosols.The nano-aerosols could be sampled effective-ly with the self-made device.The sampling mechanism and functions of its parts were introduced in detail.Based on the working curve of absorbency and concentration of nanometer TiO₂,the concentration of TiO₂ of sam-pling liquid in the sampling device could be tested with spectrophotometer at 410 nm wavelength.According to the result,the concentration of TiO₂ nano-aerosol in the air was calculated precisely.The nanometer sizer and TEM were employed to test the diameter distributions and microstructure profiles of TiO₂ of sampling and producing,respectively.The results pre-sented good consistency with each other.

Keywords：nano-aerosol;sampling device;wet method