Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 127, Issue 3, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-021-04327-w
Keywords
Al3+-doped ZnO; Micro-nanospheres; CO sensor; Response; Recovery
Funding
- International Science and Technology Innovation Cooperation between Governments Project of National Key Research and Development Program [2018YFE0199200]
- government of China [CB02-19]
- government of Belarus [CB02-19]
- National R&D Program of China [2017YFA0207400]
- Natural Science Basic Research Plan in Shaanxi Province of China [2017JM5022]
- Open Fund of Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test [ZSKJ201706]
- Key Industry Innovation Chain Project of Shaanxi Provincial Science and the Technology Department [2018ZDCXL-GY-08-02-01]
- Xi'an Key Laboratory of Intelligent Detection and Perception [201805061ZD12CG45]
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The study showed that Al3+ doping can enhance the gas sensitivity of zinc oxide micro-nanospheres and reduce particle size distribution. Sensors based on Al3+-doped micro-nanospheres exhibited the best response for detecting carbon monoxide, with faster response compared to Al3+-doped nanoparticles.
Al3+-doped ZnO micro-nanospheres (AZO MNSs) were obtained in the method of collochemistry at a low cost, and the effects of the concentration of Al3+ on morphology, structural and gas-sensitive properties of the AZO MNSs were investigated. It was found that Al3+ doping reduced the particle size distribution of the MNSs and, in addition, also significantly enhanced the gas sensitivity of sensors which are based on ZnO MNSs. Sensor based on A1ZO MNSs showed the best response property for detection of carbon monoxide. Meanwhile, the response/recovery property of A1ZO MNSs and A1ZO nanoparticles (NPs) sensors was also compared and discussed. The sensor based on A1ZO MNSs exhibited a rapider response than A1ZO NPs ones did due to its less grain boundaries.
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