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- W4312223485 endingPage "263" @default.
- W4312223485 startingPage "263" @default.
- W4312223485 abstract "Metal oxide semiconductor gas sensors are widely used to detect toxic and inflammable gases in industrial production and daily life. The main research hotspot in this field is the synthesis of gas sensing materials. Previous studies have shown that incorporating two or more metal oxides to form a heterojunction interface can exhibit superior gas sensing performance in response and selectivity compared with single phase. This review focuses on mainly the synthesis methods and gas sensing mechanisms of metal oxide heterostructures. A significant number of heterostructures with different morphologies and shapes have been fabricated, which exhibit specific sensing performance toward a specific target gas. Among these synthesis methods, the hydrothermal method is noteworthy due to the fabrication of diverse structures, such as nanorod-like, nanoflower-like, and hollow sphere structures with enhanced sensing properties. In addition, it should be noted that the combination of different synthesis methods is also an efficient way to obtain metal oxide heterostructures with novel morphologies. Despite advanced methods in the metal oxide semiconductors and nanotechnology field, there are still some new issues which deserve further investigation, such as long-term chemical stability of sensing materials, reproducibility of the fabrication process, and selectivity toward homogeneous gases. Moreover, the gas sensing mechanism of metal oxide heterostructures is controversial. It should be clarified so as to further integrate laboratory theory research with practical exploitation." @default.
- W4312223485 created "2023-01-04" @default.
- W4312223485 creator A5012683859 @default.
- W4312223485 creator A5021875874 @default.
- W4312223485 creator A5053451138 @default.
- W4312223485 date "2022-12-27" @default.
- W4312223485 modified "2023-09-30" @default.
- W4312223485 title "Metal Oxide Heterostructures for Improving Gas Sensing Properties: A Review" @default.
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