| Autor: |
Tingting Chen, Jianhai Sun, Ning Xue, Wen Wang, Zongchang Luo, Qinqin Liang, Tianye Zhou, Hao Quan, Haoyuan Cai, Kangsong Tang, Kaisheng Jiang |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Microsystems & Nanoengineering, Vol 9, Iss 1, Pp 1-11 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2055-7434 |
| DOI: |
10.1038/s41378-023-00517-z |
| Popis: |
Abstract Hydrogen sulfide (H2S) detection remains a significant concern and the sensitivity, selectivity, and detection limit must be balanced at low temperatures. Herein, we utilized a facile solvothermal method to prepare Cu-doped SnO2/rGO nanocomposites that have emerged as promising candidate materials for H2S sensors. Characterization of the Cu-SnO2/rGO was carried out to determine its surface morphology, chemical composition, and crystal defects. The optimal sensor response for 10 ppm H2S was ~1415.7 at 120 °C, which was over 320 times higher than that seen for pristine SnO2 CQDs (R a/R g = 4.4) at 280 °C. Moreover, the sensor material exhibited excellent selectivity, a superior linear working range (R 2 = 0.991, 1–150 ppm), a fast response time (31 s to 2 ppm), and ppb-level H2S detection (R a/R g = 1.26 to 50 ppb) at 120 °C. In addition, the sensor maintained a high performance even at extremely high humidity (90%) and showed outstanding long-term stability. These superb H2S sensing properties were attributed to catalytic sensitization by the Cu dopant and a synergistic effect of the Cu-SnO2 and rGO, which offered abundant active sites for O2 and H2S absorption and accelerated the transfer of electrons/holes. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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