Fe2O3-loaded NiO nanosheets for fast response/recovery and high response gas sensor
| Autor: | Wenhu Tan, Jianfeng Tan, Lvrong Fan, Jing Qian, Xintang Huang, Zetai Yu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Scanning electron microscope Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences Nanomaterials chemistry.chemical_compound Materials Chemistry Electrical and Electronic Engineering Porosity Instrumentation Detection limit Non-blocking I/O Thermal decomposition Metals and Alloys Heterojunction 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Chemical engineering Methanol 0210 nano-technology |
| Zdroj: | Sensors and Actuators B: Chemical. 256:282-293 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2017.09.187 |
| Popis: | Porous Fe 2 O 3 -loaded NiO nanosheets were obtained by the thermal decomposition nanosheets of iron element-loaded Ni(OH) 2 synthesized via microwave-assisted liquid-phase synthesis under atmospheric condition. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopic (TEM) and Brunauer Emmett Teller (BET) N 2 adsorption–desorption analysis were used to characterize the as-prepared products. Gas sensing measurement indicated that the sensor based on the 1.5% Fe 2 O 3 -loaded NiO nanosheets exhibits untrafast response speed as well as short recovery time and high responses to ethanol and methanol (the response/recovery time of the gas sensor are 0.5/14.6 s and 0.1/11.4 s with the responses of 170.7 and 107.9–100 ppm ethanol and methanol, respectively). In addition, the 1.5% Fe 2 O 3 -loaded NiO nanosheets-based sensor can detect ethanol and methanol at a detection limit of well below 200 ppb (the responses are 6.88 and 6.82–200 ppb ethanol and methanol, respectively). The enhanced sensing behaviors can be attributed to the nanosheet-like structure and n-type Fe 2 O 3 /p-type NiO heterojunction. The time-saving method developed by us is easy to control to produce the nano-particulate composites without high experimental requirement and make it possible in commercial applications. Our work may explore a possibility to synthesize nanomaterial with ultrafast responding and fast recovering behaviors for real-time monitoring gas sensor. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect