Abstract
Gas sensors have received extensive attention because of the gas pollution caused by rapid construction of urbanization and industrialization. Gas sensors based on semiconductor metal oxide (SMO) have the advantages of high response, excellent repeatability, stability, and cost-effectiveness, and have become extremely important components in the gas sensor field. Materials with regular structures and controllable morphology exhibit more consistent and repeatable performance. However, during the process of material synthesis, because of the uncontrollability of the microcosm, nanomaterials often show irregularities, unevenness, and other shortcomings. Thus, the synthesis of gas sensors with well-aligned one-dimensional (1D) structures, two-dimensional (2D) layered structures, and three-dimensional (3D) hierarchical structures has received extensive attention. To obtain regular structured nanomaterials with desired morphologies and dimensions, a template-assisted synthesis method with low cost and controllable process seems a very efficient strategy. In this review, we introduce the morphology and performance of SMO sensors with 1D, 2D, and 3D structures, discuss the impact of a variety of morphologies on gas sensor performance (response and stability), and shed new light on the synthesis of gas sensing materials with stable structure and excellent performance.
摘要
由于城市化和工业化的快速建设所带来的气体污染, 气体传感器受到广泛关注. 基于半导体金属氧化物(SMO)的气体传感器具有响应高、 重复性好、 稳定性好、 性价比高等优点, 已成为气体传感器领域极其重要的元器件. 通常, 具有规则结构和可控形态的材料表现出更稳定且可重复的性能. 然而, 由于微观世界的不可控性, 在材料合成过程中纳米材料往往表现出不规则、 不均匀等缺点. 因此, 具有规整结构的一维(1D)结构、 二维(2D)结构和三维(3D)结构的气敏材料的合成受到广泛关注. 为了定向获得具有理想形貌和尺寸的结构规整的纳米材料, 低成本且操作简洁可控的模板辅助合成法是一种非常有效的策略. 本文介绍了一维、 二维和三维结构的SMO传感器的形貌和性能, 讨论了各种形貌对气体传感器性能(响应和稳定性)的影响, 为结构稳定、 性能优异的气敏材料的合成提供了新的思路.
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Yuanyang XUN summarized the review. Feiyu ZHANG and Yan HONG drafted the paper. Ke XU and Ligang CHEN helped organize the paper. Siqi LI, Song LIU, and Bin LI revised and finalized the paper.
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Yuanyang XUN, Siqi LI, Feiyu ZHANG, Yan HONG, Ke XU, Ligang CHEN, Song LIU, and Bin LI declare that they have no conflict of interest.
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Project supported by the National Natural Science Foundation of China (No. 62001097), the Natural Science Foundation of Heilongjiang Province (No. LH2020F001), the Young Elite Scientists Sponsorship Program by China Association for Science and Technology (CAST) (No. YESS20210262), the China Postdoctoral Science Foundation-Funded Project (No. 2021M690571), the Heilongjiang Postdoctoral Fund, China (No. LBH-Z21096), and the Fundamental Research Funds for the Central Universities, China (No. 2572020BU04)
List of supplementary materials
1 Fundamentals of semiconductor metal oxide (SMO) gas sensors
2 Some main points in template-assisted synthesis
3 3D materials prepared using plant polyphenols as a template
Table S1 Summary of nanomaterials for gas sensing using plant polyphenols as a template
Fig. S1 Sensing mechanism
Fig. S2 Sample characterization
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Xun, Y., Li, S., Zhang, F. et al. Rational design of semiconductor metal oxide nanomaterials for gas sensing by template-assisted synthesis: a survey. Front Inform Technol Electron Eng 24, 945–963 (2023). https://doi.org/10.1631/FITEE.2200552
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DOI: https://doi.org/10.1631/FITEE.2200552