ZnO-WO_3纳米材料催化化学发光法测定呼吸气中的丙酮

Study of an Acetone Sensor Based on Cataluminescence of ZnO- WO_3 Nanometerials

研究发现丙酮可在Zn O/WO3复合纳米材料表面产生强烈的化学发光现象。在考察波长、温度、流速等因素对该发光反应影响的基础上,设计了一种可测定糖尿病人呼吸气中丙酮的传感器。该传感器测定丙酮浓度的线性范围为0.025 9~5.18 mg/L,检出限为0.013 mg/L。呼吸气中其余气体如二氧化碳、氨气和水蒸气等不干扰测定。经连续60 h通过1.30 mg/L丙酮蒸气,26次测定结果的相对标准偏差（RSD）为3.6%,表明该传感器具有较好的使用寿命。

It was found that acetone has a cataluminescence （CL） phenomenon on the surface of ZnO/WO3 nanometerials. The luminescence characteristics and effect of different parameters, such as wavelength, temperature and flow rate were discussed by a prepared CL detection system. Based on this, a sensor was designed to detect acetone in human breath of diabetes. Under the optimized conditions, the linear range of CL intensity versus concentration of acetone vapor was 0. 025 9 - 5.18 rag/L, with a limit of detection of 0. 013 mg/L. The carbon dioxide, ammonia and water vapor in the breath had no obvious interference to the detection except for the ethanol. This sensor was evalua- ted continuously for 60 h with 1.30 mg/L gaseous acetone, and the relative standard deviation was 3.6% for 26 determinations. The sensor showed a better life.