Ag-Modified SnS<sub>2</sub>/SnO<sub>2</sub> Nanoheterojunctions for Low-Temperature NO<sub>2</sub> Sensing
Realizing low-temperature detection of NO2 is crucial to protecting the environment and human health. In this study, SnS2/SnO2 hexagonal nanosheets with an average size of 630 nm were synthesized by a two-step process. Subsequently, Ag nanoparticles were modified on the surface of SnS2/SnO2 to form Ag-modified SnS2/SnO2 nanoheterojunctions. Compared to SnS2 and SnS2/SnO2 sensors, Ag/SnS2/SnO2-based sensors have better gas-sensing performance at the optimum operating temperature of 100 °C, including higher response, better stability, and excellent selectivity to NO2. The response value of the Ag/SnS2/SnO2 sensor to 7 ppm of NO2 at 100 °C is 56.4, which is four times higher than that of the SnS2 sensor. The outstanding NO2 sensing properties of the Ag/SnS2/SnO2 can be due to the combination of Ag modification and the formation of the SnS2–SnO2 heterojunction.
Authors
- Na Luo (ORCID: https://orcid.org/0000-0001-7336-2393)
- Bo Zhang (ORCID: https://orcid.org/0000-0001-5860-6206)
- Hari Bala (ORCID: https://orcid.org/0000-0002-9383-4308)
- Saisai Zhang (ORCID: https://orcid.org/0000-0002-0603-8873)
- Bowen Zhang (ORCID: https://orcid.org/0000-0002-6324-3988)
- Yan Wang (ORCID: https://orcid.org/0000-0001-6671-4661)
- Chongyang Wang (ORCID: https://orcid.org/0000-0003-0515-3922)
- Zhenyang Zhang (ORCID: https://orcid.org/0009-0000-2821-7736)
Institutions
- Office of Science (US)
- Henan Polytechnic University (CN)
Publication Details
- Journal
- ACS Applied Nano Materials
- Published
- 2024-12-12
- DOI
- https://doi.org/10.1021/acsanm.4c05580
- Citations
- 17
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 3.55
Funders
- National Natural Science Foundation of China
- Key Scientific Research Project of Colleges and Universities in Henan Province