Construction of LaF3 QD-modified SnS2 nanorod composites for ultrasensitive detection of H2S

被引：74

作者：

Tang, Mingcong ^{[1
]}

Wang, Zijian ^{[1
]}

Wang, Dongyue ^{[1
]}

Mao, Ruiyuan ^{[1
]}

Zhang, Hao ^{[1
]}

Xu, Wei ^{[2
]}

Yang, Zhe ^{[2
]}

Zhang, Dongzhi ^{[1
]}

机构：

[1] China Univ Petr East China, Coll Control Sci & Engn, Qingdao 266580, Peoples R China

[2] SINOPEC Res Inst Safety Engn Co Ltd, State Key Lab Safety & Control Chem, Qingdao 266071, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2023年 / 11卷 / 18期

基金：

中国国家自然科学基金;

关键词：

DECOMPOSITION PRODUCTS; SF6; MONOLAYER; GAS;

D O I：

10.1039/d2ta08496a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The rapid detection of low-concentration H2S gas is of great significance to ensure the normal operation of SF6 electrical insulation equipment. Here, a sensitive material made of LaF3 QD modified SnS2 nanorods was prepared for the detection of H2S gas. The sensor has an optimal operating temperature of 150 degrees C and exhibits excellent stability, moisture resistance, selectivity, and long-term stability. The response value of the sensor to 30 ppm was 85.2%, and the response and recovery times were 4 s and 93 s, respectively. First-principles calculations showed that LaF3 QDs enhance the adsorption of H2S by SnS2, and further described the interaction mechanism between LaF3-SnS2 and H2S. The greatly improved performance of 15% LaF3-SnS2 can be attributed to the sensitization synergistic effect and heterojunction effect of QDs. A H2S detection circuit based on a 15% LaF3-SnS2 sensor was constructed, and the real-time display and alarm functions of the concentration were realized. The H2S sensor prepared with 15% LaF3-SnS2 is expected to be a sensing device for detecting SF6 electrical insulation equipment.

引用

页码：9942 / 9954

页数：13

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