Journal
NANOMATERIALS
Volume 11, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/nano11113026
Keywords
black phosphorus/PANI nanocomposite; thin film; gas sensor; ammonia
Categories
Funding
- Sichuan Science and Technology Program [2020ZDZX0005]
- National Natural Science Foundation of China [62003278, 11872069]
- Innovation Capability Support Program of Shaanxi [2021KJXX-66]
- Talent Introduction of Xihua University [Z202063]
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In this study, BP/PANI nanocomposite was synthesized as a novel sensing material for NH3 detection through in situ chemical oxidative polymerization. The experimental results show that the BP/PANI sensor exhibits higher sensitivity and a larger detection range compared to PANI.
Recently, as a two-dimensional (2D) material, black phosphorous (BP) has attracted more and more attention. However, few efforts have been made to investigate the BP/polyaniline (PANI) nanocomposite for ammonia (NH3) gas sensors. In this work, the BP/PANI nanocomposite as a novel sensing material for NH3 detection, has been synthesized via in situ chemical oxidative polymerization, which is then fabricated onto the interdigitated transducer (IDTs). The electrical properties of the BP/PANI thin film are studied in a large detection range from 1 to 4000 ppm, such as conduction mechanism, response, reproducibility, and selectivity. The experimental result indicates that the BP/PANI sensor shows higher sensitivity and larger detection range than that of PANI. The BP added into PANI, that may enlarge the specific surface area, obtain the special trough structure for gas channels, and form the p-pi conjugation system and p-p isotype heterojunctions, which are beneficial to increase the response of BP/PANI to NH3 sensing. Meanwhile, in order to support the discussion result, the structure and morphology of the BP/PANI are respectively measured by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-vis), transmission electron microscopy (TEM), and field emissions scanning electron microscopy (SEM). Moreover, the sensor shows good reproducibility, and fast response and recovery behavior, on NH3 sensing. In addition, this route may offer the advantages of an NH3 sensor, which are of simple structure, low cost, easy to assemble, and operate at room temperature.
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