Thông tin tài liệu
Nhan đề : |
Dip-coating decoration of Ag2O nanoparticles on SnO2 nanowires for high-performance H2S gas sensors |
Tác giả : |
Tran, Thi Ngoc Hoa |
Người hướng dẫn: |
Nguyen, Van Duy Chu, Manh Hung Nguyen, Van Hieu Ho, Huu Hau Nguyen, Duc Hoa |
Năm xuất bản : |
2021 |
Nhà xuất bản : |
RSC Advances |
Tóm tắt : |
SnO2 nanowires (NWs) are used in gas sensors, but their response to highly toxic gas H2S is low. Thus, their performance toward the effective detection of low-level H2S in air should be improved for environmental-pollution control and monitoring. Herein, Ag2O nanoparticle decorated SnO2 NWs were prepared by a simple on-chip growth and subsequent dip-coating method. The amount of decorated Ag2O nanoparticles on the surface of SnO2 NWs was modified by changing the concentration of AgNO3 solution and/or dipping times. Gas-sensing measurements were conducted at various working temperatures (200–400 °C) toward different H2S concentrations ranging within 0.1–1 ppm. The selectivity of Ag2O-decorated SnO2 NW sensors for ammonia and hydrogen gases was tested. Results confirmed that the Ag2O-decorated SnO2 NW sensors had excellent response, selectivity, and reproducibility. The gas-sensing mechanism was interpreted under the light of energy-band bending by sulfurization, which converted the p–n junction into n–n, thereby significantly enhancing the sensing performance. |
Mô tả: |
Q1 |
URI: |
https://pubs.rsc.org/en/content/articlelanding/2020/RA/D0RA02266G#!divAbstract https://dlib.phenikaa-uni.edu.vn/handle/PNK/1928 |
Bộ sưu tập |
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