| Title: | Tungsten Disulfide Nanotube-Modified Conductive Paper-Based Chemiresistive Sensor for the Application in Volatile Organic Compounds' Detection |
| Author(s): | Huang SJ; Immanuel PN; Yen YK; Yen CL; Tseng CE; Lin GT; Lin CK; Huang ZX; |
| Address: | "Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan. Department of Mechanical Engineering, National Taipei University of Technology, Taipei 106, Taiwan" |
| ISSN/ISBN: | 1424-8220 (Electronic) 1424-8220 (Linking) |
| Abstract: | "Toxic and nontoxic volatile organic compound (VOC) gases are emitted into the atmosphere from certain solids and liquids as a consequence of wastage and some common daily activities. Inhalation of toxic VOCs has an adverse effect on human health, so it is necessary to monitor their concentration in the atmosphere. In this work, we report on the fabrication of inorganic nanotube (INT)-tungsten disulfide, paper-based graphene-PEDOT:PSS sheet and WS(2) nanotube-modified conductive paper-based chemiresistors for VOC gas sensing. The WS(2) nanotubes were fabricated by a two-step reaction, that is oxide reduction and sulfurization, carried out at 900 degrees C. The synthesized nanotubes were characterized by FE-SEM, EDS, XRD, Raman spectroscopy, and TEM. The synthesized nanotubes were 206-267 nm in diameter. The FE-SEM results show the length of the nanotubes to be 4.5-8 microm. The graphene-PEDOT:PSS hybrid conductive paper sheet was fabricated by a continuous coating process. Then, WS(2) nanotubes were drop-cast onto conductive paper for fabrication of the chemiresistors. The feasibility and sensitivity of the WS(2) nanotube-modified paper-based chemiresistor were tested in four VOC gases at different concentrations at room temperature (RT). Experimental results show the proposed sensor to be more sensitive to butanol gas when the concentration ranges from 50 to 1000 ppm. The limit of detection (LOD) of this chemiresistor for butanol gas was 44.92 ppm. The WS(2) nanotube-modified paper-based chemiresistor exhibits good potential as a VOC sensor with the advantages of flexibility, easy fabrication, and low fabrication cost" |
| Keywords: | Disulfides Humans Limit of Detection *Nanotubes Tungsten *Volatile Organic Compounds Int-ws2 VOC gas chemiresistor graphene response time; |
| Notes: | "MedlineHuang, Song-Jeng Immanuel, Philip Nathaniel Yen, Yi-Kuang Yen, Ching-Lung Tseng, Chi-En Lin, Guan-Ting Lin, Che-Kuan Huang, Zhong-Xuan eng Switzerland 2021/09/29 Sensors (Basel). 2021 Sep 12; 21(18):6121. doi: 10.3390/s21186121" |
