Ultrasensitive methyl salicylate gas sensing determined by Pd-doped SnO2

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Frontiers of Materials Science Pub Date : 2022-12-23 DOI:10.1007/s11706-022-0625-5

Chaoqi Zhu, Xiang Li, Xiaoxia Wang, Huiyu Su, Chaofan Ma, Xiang Guo, Changsheng Xie, Dawen Zeng

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Abstract

Efficient chemical warfare agents (CWAs) detection is required to protect people from the CWAs in war and terrorism. In this work, a Pd-doped SnO₂ nanoparticles-based gas sensor was developed to detect a nerve agent simulant named methyl salicylate. The sensing measurements of methyl salicylate under different Pd doping amounts found that the 0.5 at.% Pd-doped SnO₂ exhibited a significant improvement in the detection of methyl salicylate at the ppb (1 ppb = 10⁻⁹) level, and the response value to 160 ppb methyl salicylate is 0.72 at 250 °C. Compared with the pure SnO₂, the response value is increased by 4.5 times, which could be attributed to the influence of the noble metal Pd on the oxygen state and its catalytic effect. In addition, the 0.5 at.% Pd-doped SnO₂ sensor still has an obvious response to 16 ppb methyl salicylate with a response value of 0.13, indicating the lower detection limit of the sensor.

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pd掺杂SnO2测定水杨酸甲酯超灵敏气敏

在战争和恐怖主义中，需要有效的化学战剂检测来保护人们免受化学战剂的伤害。在这项工作中，开发了一种基于pd掺杂SnO2纳米颗粒的气体传感器来检测一种名为水杨酸甲酯的神经毒剂模拟物。对水杨酸甲酯在不同Pd掺杂量下的传感测量发现，0.5 at。% pd掺杂SnO2在ppb (1 ppb = 10−9)水平上对水杨酸甲酯的检测有显著改善，在250°C下对160 ppb水杨酸甲酯的响应值为0.72。与纯SnO2相比，响应值提高了4.5倍，这可归因于贵金属Pd对氧态的影响及其催化作用。此外，0.5 at。% pd掺杂SnO2传感器对16 ppb水杨酸甲酯仍有明显响应，响应值为0.13，表明该传感器的检测限较低。

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来源期刊

Frontiers of Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.20

自引率

3.70%

发文量

515

期刊介绍： Frontiers of Materials Science is a peer-reviewed international journal that publishes high quality reviews/mini-reviews, full-length research papers, and short Communications recording the latest pioneering studies on all aspects of materials science. It aims at providing a forum to promote communication and exchange between scientists in the worldwide materials science community. The subjects are seen from international and interdisciplinary perspectives covering areas including (but not limited to): Biomaterials including biomimetics and biomineralization; Nano materials; Polymers and composites; New metallic materials; Advanced ceramics; Materials modeling and computation; Frontier materials synthesis and characterization; Novel methods for materials manufacturing; Materials performance; Materials applications in energy, information and biotechnology.