Fabrication of Effective Room Temperature Chemiresistive Gas Sensor by Utilizing p-type CuO @ n-type g-C3N4 Heterojunction Nanocomposite
ChemNanoMat, cilt.12, sa.9, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 12 Sayı: 9
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/cnma.70342
- Dergi Adı: ChemNanoMat
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Chemical Abstracts Core, Compendex
- Anahtar Kelimeler: CO2, CuO, g-C3N4, gas sensor, H2, heterojunction, room temperature (RT)
- Erciyes Üniversitesi Adresli: Evet
Özet
A low-cost and sensitive chemiresistive gas sensor based on a p-type CuO and n-type g-C3N4 (copper oxide and graphitic carbon nitride) nanocomposite is described. A simple hydrothermal process was used to create the CuO@g-C3N4 heterostructure, which was then applied as a sensing layer on interdigitated electrodes. CuO nanoparticles successfully formed a porous p–n heterojunction on g-C3N4 sheets, as demonstrated by structural, morphological, and compositional investigations. At room temperature (RT), both reducing (H2) and oxidizing (CO2) gases were tested by the newly fabricated sensor with outstanding performance. With response times of 10 s for H2 and 8 s for CO2, as well as recovery times of 10 and 7 s, respectively, the device showed quick response and recovery characteristics. High sensitivity was also demonstrated by the sensor's low limit of detection (LOD), which was 44.98 sccm for H2 and 13.23 sccm for CO2. Increased surface area, the creation of an efficient p–n heterojunction, and the synergistic effect of CuO and g-C3N4 are all responsible for the improved sensing behavior.