作者：蔡苹杨, 黄承韫, 安金玲

作者单位：四川省地矿局成都水文队, 四川 成都 610072

关键词：纳米氧化铟; 催化发光; 二硫化碳; 气体传感器

摘要：

基于氧化铟(In2O3)纳米材料催化二硫化碳的氧化反应产生化学发光的现象,建立一种检测环境空气中痕量二硫化碳的催化发光气体传感器。研究结果表明:在检测波长460 nm、反应温度371℃、载气流速600 mL/min的最优条件下,考察二硫化碳浓度在0.42~21 g/mL(r=0.999 3,n=6)间的响应情况,检出限为0.04 g/mL(3),对21 g/mL的二硫化碳连续平行测7次,其相对标准偏差为1.8%。此外,考察相同浓度的常见挥发性有机物的干扰情况,其结果表明该传感器具有很好的选择性。连续80h通过8.4 g/mL的二硫化碳,发光强度无明显降低,相对标准偏差小于5%,表明此传感器使用寿命长。

Research of gas sensor based on cataluminescence emission on the surface of nano-In₂O₃

CAI Ping-yang, HUANG Cheng-yun, AN Jin-ling

Chengdu Hydrology Team, Sichuan Provincial Bureau of Geology, Chengdu 610072, China

Abstract: On the basis of cataluminescence(CTL) emission on the surface of Nano-In₂O₃, a novel and sensitive sensor for determing carbon disulfide was developed.The CTL's characteristics and the optimal conditions, air flow rate of 600 mL/min, working temperature at 371℃ and wavelength at 460 nm were investigated.Under the optimized conditions, the linear range of CTL intensity versus concentration of ammonium sulfide was 0.42-21 μg/mL(r=0.999 3, n=6) with a detection limit of 0.04 μg/mL (3σ).The relative standard deviation (RSD) for 21 μg/mL carbon disulfide was 1.8%(n=7).Interference experiments showed that there was no response from common foreign substances, and the present sensor can be used for the coutinuously determing 8.4 μg/mL carbon disulfide more than 80 h over two weeks with a RSD less than 5%.

Keywords: nano indium oxide; cataluminescence; carbon disulfide; gas sensor

2013, 39(5): 42-45  收稿日期: 2013-4-3;收到修改稿日期: 2013-6-9

基金项目: 

作者简介: 蔡苹杨(1987-),男,重庆市人,助理工程师,博士研究生,主要从事光谱分析研究工作。

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