Enhancement of NH3 gas sensing with Ag-Pt co-catalyst on SnO2 nanofilm towards medical diagnosis

被引：19

作者：

Duy, Nguyen Van ^{[1
]}

Trang, Duong Thi Thuy ^{[1
]}

Le, Dang Thi Thanh ^{[1
]}

Hung, Chu Manh ^{[1
]}

Tonezzer, Matteo ^{[2
,3
]}

Nguyen, Hugo ^{[4
]}

Hoa, Nguyen Duc ^{[1
]}

机构：

[1] Hanoi Univ Sci & Technol HUST, ITIMS, Hanoi, Vietnam

[2] Univ Trento, Fdn Edmund Mach, Ctr Agr Food Environm, Via E Mach 1, I-38010 San Michele All Adige, Italy

[3] IMEM CNR, Via Cascata 56 C, I-38123 Trento, Italy

[4] Uppsala Univ, Dept Engn Sci, Lagerhyddsvagen 1, S-75121 Uppsala, Sweden

来源：

THIN SOLID FILMS | 2023年 / 767卷

关键词：

Ammonia; Gas sensor; Tin dioxide; Nanofilm; Silver-platinum alloy; Breath diagnosis; THIN-FILM; BREATH AMMONIA; ALLOY; NANOWIRES; NANORODS; SENSORS;

D O I：

10.1016/j.tsf.2023.139682

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Exhaled breath analysis is a noninvasive diagnostic method for fatal disease monitoring and screening, which is recently gained extensive interest of researchers worldwide emphasizing on the development of effective chemiresistive gas sensor for practical application. Here, the Ag-Pt bimetallic nanoparticles were used to deco-rate nanofilms of SnO2 making different gas sensors with high performance. We found that the bimetal alloy improved the sensor performance significantly with super sensitivity as compared with the separate Ag and Pt catalyst. The right ratio of the bimetal made the sensor very sensitive to NH3, so that it was able to quickly (12 s) detect 1 parts-per-million of NH3 with a response of 4.31 at a temperature of 250 degrees C. The sensor limit of detection for NH3 was less than 10 parts-per-billion. The response of the sensor was negligibly affected by humidity and interfering gases. The results showed that the tiny, robust, and inexpensive sensor developed in this work can be used in breath analysis for early diagnosis via NH3 monitoring.

引用

页数：10

共 32 条

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