Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (4): 581-584.doi: 10.1007/s40242-015-5017-2

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Preparation of Sulfur-doped PANI/TiO2 Nanowires and Its Sensing Properties to Mercury

WANG Dong1, LIU Xiaomeng1, FANG Zhenxing2, LI Jian3, SUN Mojie1   

  1. 1. Department of Chemical Engineering, Northeast Dianli University, Jilin 132012, P. R. China;
    2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China;
    3. State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300192, P. R. China
  • Received:2015-01-12 Revised:2015-04-20 Online:2015-08-01 Published:2015-06-16
  • Contact: SUN Mojie E-mail:smoj@mail.nedu.edu.cn
  • Supported by:

    Supported by the Jilin City Science and Technology Project of Jilin Province, China(No.2013625011) and the State Key Laboratory of Precision Measuring Technology and Instruments Foundation, Tianjin University, China.

Abstract:

TiO2 nanowires were successfully prepared via a simple hydrothermal method and a layer of sulfurized polyaniline(PANI) was loaded onto their surface to prepare a sensor of elemental mercury at room temperature. The sulfurized PANI/TiO2 composite sensor has a high sensitivity to mercury in a range of density from 5.57 mg/m3 to 126.18 mg/m3 at room temperature. The response time and recovery time are relatively short. We also investigated the sensitivity and response time to other interfering gases, such as NO2, SO2 and NH3. And the sulfurized PANI/TiO2 composite material shows a good selectivity for element mercury. The microscopic structure of the sensor was investigated via X-ray diffraction(XRD), scanning electron microscopy(SEM) and energy dispersive X-ray analysis (EDAX). The sulfurized PANI/TiO2 composite material shows a high sensitive response, and good selectivity to element mercury, which is promising for the application in the detection of element mercury.

Key words: Hg sensor, PANI/TiO2, Hg pollution, Mercury emissions monitoring