Sensors and Actuators B: Chemical ( IF 8.0 ) Pub Date : 2022-03-15 , DOI: 10.1016/j.snb.2022.131715
Xin-Yu Huang 1 , Zong-Tao Chi 1 , Woochul Yang 2 , Yonghui Deng 3 , Wan-Feng Xie 1, 2
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The ability to detect a volatile organic compound in real-time, such as isopropanol (IPA) gas, is critical for human health and safety protection, especially since the sensor can operate at low temperatures and behave outstanding sensing performances. Herein, the Bi2O2CO3/In(OH)3·xH2O nanocomposites are synthesized using a two-step hydrothermal process, particularly the surfaces of Bi2O2CO3 (BCO) nanosheets were embellished with In(OH)3·xH2O nanoparticles. It is found that the BCO/In(OH)3·xH2O sensors exhibit an excellent response of 20.39, wide concentration detection range from 1 to 1000 ppm, the working temperature as low as 100 ºC, and the rapid response/recovery times of 5 s and 4 s towards 100 ppm IPA. On the other hand, the selectivity of the BCO/In(OH)3·xH2O sensor towards IPA is eye-catching. In particular, the enhanced IPA sensing performances might be attributed to the large specific area (52.46 m2/g). The increased conductivity of BCO/In(OH)3·xH2O nanocomposites due to incorporation of the In(OH)3·xH2O, which can significantly promote the surface-catalyzed reaction between oxygen species such as O- and IPA molecules.
中文翻译:
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具有优异低温性能的异丙醇传感器Bi2O2CO3/In(OH)3·xH2O纳米复合材料的合成
实时检测挥发性有机化合物(例如异丙醇 (IPA) 气体)的能力对于保护人类健康和安全至关重要,特别是因为传感器可以在低温下工作并表现出出色的传感性能。本文采用两步水热法合成Bi 2 O 2 CO 3 /In(OH) 3 ·xH 2 O纳米复合材料,特别是Bi 2 O 2 CO 3 (BCO)纳米片的表面用In(OH)修饰。 ) 3 ·xH 2 O 纳米粒子。发现 BCO/In(OH) 3 ·xH 2O 传感器具有 20.39 的出色响应、1 至 1000 ppm 的宽浓度检测范围、低至 100 ºC 的工作温度,以及 5 秒和 4 秒的快速响应/恢复时间(针对 100 ppm IPA)。另一方面,BCO/In(OH) 3 ·xH 2 O 传感器对IPA 的选择性引人注目。特别是,增强的 IPA 传感性能可能归因于大的比面积(52.46 m 2 /g)。BCO/In(OH) 3 ·xH 2 O 纳米复合材料的电导率由于 In(OH) 3 ·xH 2 O 的加入而增加,这可以显着促进氧物质之间的表面催化反应,例如 O -和 IPA 分子。