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One-Step Synthesis of Co-Doped In2O3 Nanorods for High Response of Formaldehyde Sensor at Low Temperature
ACS Sensors ( IF 8.9 ) Pub Date : 2018-01-30 00:00:00 , DOI: 10.1021/acssensors.7b00896
Zhihua Wang 1 , Changliang Hou 1 , Qinma De 1 , Fubo Gu 1 , Dongmei Han 1
Affiliation  

Uniform and monodisperse Co-doped In2O3 nanorods were fabricated by a facile and environmentally friendly hydrothermal strategy that combined the subsequent annealing process, and their morphology, structure, and formaldehyde (HCHO) gas sensing performance were investigated systematically. Both pure and Co-doped In2O3 nanorods had a high specific surface area, which could offer abundant reaction sites to gas molecular diffusion and improve the response of the gas sensor. Results revealed that the In2O3/1%Co nanorods exhibited a higher response of 23.2 for 10 ppm of HCHO than that of the pure In2O3 nanorods by 4.5 times at 130 °C. More importantly, the In2O3/1%Co nanorods also presented outstanding selectivity and long-term stability. The superior gas sensing properties were mainly attributed to the incorporation of Co, which suggested the important role of the amount of oxygen vacancies and adsorbed oxygen in enhancing HCHO sensing performance of In2O3 sensors.

中文翻译:

一步合成Co掺杂的2 O 3纳米棒在低温下对甲醛传感器的高响应

通过一种简便且环保的水热策略,结合随后的退火工艺,制备出均匀且单分散的共掺杂In 2 O 3纳米棒,并对其形貌,结构和甲醛(HCHO)气体传感性能进行了系统研究。纯和Co掺杂的In 2 O 3纳米棒均具有较高的比表面积,可为气体分子扩散提供丰富的反应部位,并改善气体传感器的响应。结果表明,In 2 O 3 /1%Co纳米棒对10 ppm HCHO的响应比纯In 2 O 3的响应高23.2。纳米棒在130°C下加热4.5倍。更重要的是,In 2 O 3 /1%Co纳米棒还具有出色的选择性和长期稳定性。优异的气体感测性能主要归因于Co的掺入,这表明氧空位和吸附氧的量在增强In 2 O 3传感器的HCHO感测性能中起着重要作用。
更新日期:2018-01-30
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