Oxygen-Vacancy-Enriched Porous α-MoO3 Nanosheets for Trimethylamine Sensing
Source abstract
Abstract
Two-dimensional ultrathin porous α-MoO3 nanosheets with oxygen vacancies were synthesized by a simple solvothermal method. The thickness of the precursor reaches 14 nm and is accumulated by sheets of 2–6 nm. The pore size is 2–10 nm on the surface. A gas sensor was assembled with the α-MoO3 nanosheets annealed at 400 °C (α-MoO3-400). The sensor based on α-MoO3-400 achieves the fastest response to trimethylamine (TMA) gas at relatively low operating temperature (133 °C). The response of the sensor is 198–50 ppm TMA and the detection limit is 20 ppb. In addition, the sensing mechanism is verified by experiment that the gas molecules adsorb on the surface of MoO3 and participate in the electron transfer of the semiconductor. DFT calculations suggest that MoO3 containing oxygen vacancy can increase charge transfer after TMA adsorbed.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Transition Metal Oxide Nanomaterials · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People’s Republic of China, Heilongjiang University, Harbin 150080, P.R. China
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P.R. China
Funding
National Natural Science Foundation of China · Department of S and T for Social Development · Heilongjiang University Postgraduate Innovation Research Project · Heilongjiang Touyan Innovation Team Program
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