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Construction of flower-like hierarchical Ni-doped SnO2 nanosheets and their gas sensing properties for ethanol
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2023-07-21 , DOI: 10.1039/d3nj01694c Wei Xiao 1, 2 , Zhao Jin 1 , Wei Yang 1 , Shantang Liu 1
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2023-07-21 , DOI: 10.1039/d3nj01694c Wei Xiao 1, 2 , Zhao Jin 1 , Wei Yang 1 , Shantang Liu 1
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Detecting ethanol is desirable in alcohol testing for safe driving. Therefore, developing an ethanol sensor with an obvious response and fast detection speed is urgent. In this work, a series of Ni-doped SnO2 nanosheets with flower-like hierarchical morphologies have been constructed and utilized for detecting ethanol vapor. The results indicate that the sensor response (Ra/Rg) of 3 mol% Ni-doped SnO2 is as high as 43.22 towards 100 ppm ethanol at 275 °C, about 6 times higher than that of pure SnO2. In addition, a short response/recovery time (11 s/14 s for 100 ppm ethanol), and excellent selectivity are also determined. This improved ethanol-sensing response is ascribed to two aspects: (1) a unique open structure assembled by ultrathin nanosheets (20–25 nm), favorable for gas-diffusion and gas–solid interactions and (2) a higher number of oxygen vacancies and chemisorbed oxygen in SnO2 after Ni-doping, contributing to the gas-sensing response. This work presents an efficient strategy combining morphology design and doped engineering for exploiting high-performance gas sensors.
中文翻译：
花状分级Ni掺杂SnO2纳米片的构建及其乙醇气敏性能
在酒精测试中检测乙醇对于安全驾驶是可取的。因此，开发一种响应明显、检测速度快的乙醇传感器刻不容缓。在这项工作中，构建了一系列具有花状分层形貌的Ni掺杂SnO 2纳米片，并将其用于检测乙醇蒸气。结果表明，3 mol% Ni掺杂SnO 2在275 °C下对100 ppm乙醇的传感器响应（ R a / R g ）高达43.22，比纯SnO 2高约6倍。此外，还具有较短的响应/恢复时间（100 ppm 乙醇为 11 秒/14 秒）和出色的选择性。这种改进的乙醇传感响应归因于两个方面：（1）由超薄纳米片（20-25 nm）组装的独特开放结构，有利于气体扩散和气固相互作用；（2）更多的氧空位Ni掺杂后SnO 2中化学吸附的氧有助于气敏响应。这项工作提出了一种结合形态设计和掺杂工程的有效策略，用于开发高性能气体传感器。
更新日期：2023-07-21
中文翻译：
花状分级Ni掺杂SnO2纳米片的构建及其乙醇气敏性能
在酒精测试中检测乙醇对于安全驾驶是可取的。因此，开发一种响应明显、检测速度快的乙醇传感器刻不容缓。在这项工作中，构建了一系列具有花状分层形貌的Ni掺杂SnO 2纳米片，并将其用于检测乙醇蒸气。结果表明，3 mol% Ni掺杂SnO 2在275 °C下对100 ppm乙醇的传感器响应（ R a / R g ）高达43.22，比纯SnO 2高约6倍。此外，还具有较短的响应/恢复时间（100 ppm 乙醇为 11 秒/14 秒）和出色的选择性。这种改进的乙醇传感响应归因于两个方面：（1）由超薄纳米片（20-25 nm）组装的独特开放结构，有利于气体扩散和气固相互作用；（2）更多的氧空位Ni掺杂后SnO 2中化学吸附的氧有助于气敏响应。这项工作提出了一种结合形态设计和掺杂工程的有效策略，用于开发高性能气体传感器。
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