Shaddock peels as bio-templates synthesis of Cd-doped SnO2 nanofibers: A high performance formaldehyde sensing material
Shaddock peels as bio-templates synthesis of Cd-doped SnO2 nanofibers: A high performance formaldehyde sensing material
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DOI：
10.1016/j.jallcom.2019.152170
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发表时间：
2020-01
影响因子：
6.2
通讯作者：
Rongjun Zhao;Xu Zhang;Sijia Peng;Ping Hong;Tong Zou;Zidong Wang;Xinxin Xing;Yue Yang;
中科院分区：
文献类型：
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作者：
Rongjun Zhao;Xu Zhang;Sijia Peng;Ping Hong;Tong Zou;Zidong Wang;Xinxin Xing;Yue Yang;
以柚子皮为生物模板，采用水热法制备了一维结构的Cd掺杂SnO 2。采用XRD、FESEM、TEM、XPS和N2吸附-脱附等技术对材料进行了表征。有趣的是，观察到独特的一维纤维状结构，由许多小纳米颗粒组成。结果表明，Cd掺杂量为5mol%的SnO 2纳米纤维具有较大的比表面积，达到38.850 m2/g。同时，还研究了基于所制备的SnO 2纳米纤维的气敏特性。基于5 mol% Cd掺杂SnO 2纳米纤维的传感器在160 °C的较低操作温度下对甲醛显示出最高的响应。该传感器对甲醛具有良好的气敏性能，这可能与其独特的一维纤维状结构、较大的比表面积以及Cd的添加有关，Cd的添加为传感材料表面吸附的氧离子与甲醛分子的反应提供了更多的活性位。此外，基于上述实验结果，详细讨论了传感器对甲醛可能的传感机理。
One-dimensional (1D) structural Cd-doped SnO2are prepared using shaddock peels as bio-templates via a facile hydrothermal method. The as-synthesized materials are characterized by different techniques, including XRD, FESEM, TEM, XPS and N2adsorption-desorption. Interestingly, unique 1D fiber-like structures are observed and composed of numerous small nanoparticles. Moreover, the result shows that 5 mol% Cd-doped SnO2nanofibers possesses a larger specific surface area of 38.850 m2/g. At the same time, the gas-sensing properties of sensors based on as-prepared SnO2nanofibers are also investigated. The 5 mol% Cd-doped SnO2nanofibers based sensor shows the highest response towards formaldehyde at a lower operating temperature of 160 °C. The excellent gas-sensing properties of sensor towards formaldehyde may attribute to the unique 1D fiber-like structure, large specific surface area and the additive of Cd, which can provide more active sites for the reaction between adsorbed oxygen ions and formaldehyde molecules on the surface of sensing materials. In addition, based on the above experimental results, the possible sensing mechanism of sensor towards formaldehyde is discussed in detail.