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Preparation of a high-performance H2S gas sensor based on CuO/Co3O4 composite derived from bimetallic MOF.
- Source :
- Nanotechnology; 5/6/2024, Vol. 35 Issue 19, p1-10, 10p
- Publication Year :
- 2024
-
Abstract
- The bimetallic metal–organic frameworks (MOFs), Cu/Co-MOF, was synthesized through a solvothermal method and calcined to obtain CuO/Co<subscript>3</subscript>O<subscript>4</subscript> composites. By adjusting the molar ratio between Cu and Co ions, a composite material of CuO/Co<subscript>3</subscript>O<subscript>4</subscript> (Cu:Co = 1:1) was developed and showed excellent sensing capabilities, and the response reached as high as 196.3 for 10 ppm H<subscript>2</subscript>S detection. Furthermore, the optimal operating temperature as low as 40 °C was found. In comparison with the sensors prepared by pristine CuO and pristine Co<subscript>3</subscript>O<subscript>4</subscript>, the sensor based on CuO/Co<subscript>3</subscript>O<subscript>4</subscript> composite exhibited a significant response. Additionally, the sensor can detect H<subscript>2</subscript>S gas down to 300 ppb. The gas sensing mechanism is discussed in depth from the perspective of p–p heterojunction formation between the p-type CuO and p-type Co<subscript>3</subscript>O<subscript>4</subscript>. The as-prepared CuO/Co<subscript>3</subscript>O<subscript>4</subscript> composite-based sensor is expected to find practical application in the low-power monitoring of H<subscript>2</subscript>S. [ABSTRACT FROM AUTHOR]
- Subjects :
- GAS detectors
COPPER
METAL-organic frameworks
LOW temperatures
COPPER oxide
Subjects
Details
- Language :
- English
- ISSN :
- 09574484
- Volume :
- 35
- Issue :
- 19
- Database :
- Complementary Index
- Journal :
- Nanotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 175542767
- Full Text :
- https://doi.org/10.1088/1361-6528/ad2481