0D/2D CdS/ZnO composite with n-n heterojunction for efficient detection of triethylamine.
0D/2D CdS/ZnO composite with n-n heterojunction for efficient detection of triethylamine.
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DOI：
10.1016/j.jcis.2021.05.082
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发表时间：
2021-05
影响因子：
9.9
通讯作者：
Jingjing Liu;Bicheng Zhu;L. Zhang;Jiajie Fan;Jiaguo Yu
中科院分区：
文献类型：
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作者：
Jingjing Liu;Bicheng Zhu;L. Zhang;Jiajie Fan;Jiaguo Yu
为了人类的健康，寻找对三乙胺具有显著气敏性能的新型材料势在必行。本文通过在超薄的氧化锌纳米薄片上原位生长硫化镉量子点，成功地制备了一种基于0D/2D结构的硫化镉/氧化锌复合材料的三乙胺传感器。调整两种成分之间的比例，并对其效果进行评估。最优样品的最低工作温度为200℃，最高响应值为~20，最快响应时间为2×S。此外，它还具有稳定性好、选择性好、抗干扰能力强等优点。通过X射线光电子能谱、开尔文探针和密度泛函理论(DFT)模拟研究了上述有趣性能背后的机理。结果表明，这种增强的气敏特性源于良好的0-D/2D结构、n-n异质结和大的比表面积。此外，本研究还为设计具有0D/2D结构的传感器开辟了一条新的途径。
It is imperative to seek for novel materials with pronounced gas sensing performance towards triethylamine for the sake of human health. Herein, we successfully fabricate an outstanding triethylamine sensor based on CdS/ZnO composite with 0D/2D structure, which are prepared by in-situ growth of CdS quantum dots on ultra-thin ZnO nanosheets. The ratios between the two ingredients are adjusted and their effect is evaluated. The optimal sample exhibits the lowest operating temperature of 200 °C, the highest response value of ~20 and the fastest response time of 2 s. Besides, it also has the virtues of durable stability, excellent selectivity and superior anti-interference ability. The mechanism behind the aforementioned intriguing performance is investigated by X-ray photoelectron spectroscopy, Kelvin probe and density function theory (DFT) simulation. All the results verify that the enhanced gas sensing properties are derived from splendid 0D/2D structure,n-nheterojunction and large specific surface area. Additionally, this study opens an avenue for designing sensors with 0D/2D structure.