Au/α-Fe2O3/Ti3C2Tx MXene Nanosheet Heterojunctions for High-Performance NH3 Gas Detection at Room Temperature
Source abstract
Abstract
The exploitation of RT sensors with ultra-great sensitivity and unique ammonia (NH 3 ) gas selectivity is still a major scientific task in the field of gas sensing. In the article, a pristine α-Fe 2 O 3 spindle was fabricated by applying the Fe-MIL(88) as the precursor and the sample was smoothly immobilized on the appearance of Ti 3 C 2 T x MXene nanosheets through a simple solvothermal reaction, and subsequent gold nanoparticles (Au NPs) were decorated on the α-Fe 2 O 3 /Ti 3 C 2 T x MXene hybrid material through the in situ reduction process. Gas-sensing measurements presented that the sensor based on the Au/α-Fe 2 O 3 /Ti 3 C 2 T x MXene nanocomposite exhibited a brilliant NH 3 sensing behavior, and the response value of the sensor to NH 3 (1 ppm) reached 16.9% at RT under a relative humidity of 25.7%. Moreover, the designed sensor indicated a response/recovery time as low as 3/2 s and good stability. The potential gas sensing mechanism on account of the hybrid structure was discussed combined with the semiconductor depletion layer model and the synergistic effect of the Au/α-Fe 2 O 3 /Ti 3 C 2 T x MXene ternary heterojunction and Schottky contact theory. Meanwhile, the adsorption effect of NH 3 gas was verified by density functional theory calculation. This research is supposed to offer a reliable tactic for large-scale manufacturing of cost-effective, portable, and highly sensitive RT gas sensors.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: MXene and MAX Phase Materials · Gas Sensing Nanomaterials and Sensors · Advanced Memory and Neural Computing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Material Science and Engineering, University of Jinan, Jinan 250022, China
School of Transportation Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Shandong Province · Young Talent of Lifting engineering for Science and Technology in Shandong · Shandong Provincial Institution of Higher Education
References (65)
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