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用于高性能 CeO 纳米粒子/SnO 纳米片杂化气体传感器的 CeO 纳米粒子的面控制合成。

Facet-Controlled Synthesis of CeO Nanoparticles for High-Performance CeO Nanoparticle/SnO Nanosheet Hybrid Gas Sensors.

机构信息

Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.

National Institute of Advanced Industrial Science and Technology (AIST), 4-205 Sakurazaka, Moriyama, Nagoya 463-8560, Japan.

出版信息

ACS Appl Mater Interfaces. 2022 Dec 28;14(51):56998-57007. doi: 10.1021/acsami.2c17444. Epub 2022 Dec 15.

DOI:10.1021/acsami.2c17444
PMID:36521877
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9802217/
Abstract

CeO nanocubes with metastable {100} facets and CeO nanooctahedrons with the most stable {111} facets are herein fabricated by controlling the morphology and facets of CeO nanoparticles. SnO nanosheet-based assembled films coated with these CeO nanocubes or CeO nanooctahedrons yield {100} CeO nanocubes/SnO nanosheets and {111} CeO nanooctahedron/SnO nanosheet hybrid gas sensors, respectively. The hybrid sensors with CeO nanoparticles exhibited enhanced sensing responses to numerous chemical species relative to a pristine SnO nanosheet gas sensor, including acetone, hydrogen, ethanol, ammonia, acetaldehyde, and allyl mercaptan. In particular, the responses of {100} CeO nanocubes/SnO nanosheets and {111} CeO nanooctahedron/SnO nanosheet gas sensors to acetone or allyl mercaptan were 6.8 and 10.3 times higher, respectively, than that of the pristine SnO nanosheet gas sensor. Furthermore, the sensor response to ammonia was 2.5 times higher than that of a commercial volatile organic compound (VOC) gas sensor (TGS2602, Figaro Engineering Inc.). The CeO nanocube-based sensor with exposed metastable {100} facets promotes the adsorption and oxidation of VOCs owing to the higher surface energy of the metastable {100} facets and therefore exhibits a higher sensing performance than the CeO nanooctahedron-based sensor with an exposed {111} facet. The developed sensors show excellent potential for the detection of gas markers in human breath and perspiration for disease diagnosis.

摘要

CeO 纳米立方体形貌具有亚稳 {100} 面，CeO 纳米八面体形貌具有最稳定 {111} 面，通过控制 CeO 纳米颗粒的形态和晶面来制备。SnO 纳米片组装薄膜涂覆有这些 CeO 纳米立方体形貌或 CeO 纳米八面体形貌，分别得到 {100} CeO 纳米立方体形貌/SnO 纳米片和 {111} CeO 纳米八面体形貌/SnO 纳米片混合气体传感器。与原始 SnO 纳米片气体传感器相比，具有 CeO 纳米颗粒的混合传感器对多种化学物质表现出增强的传感响应，包括丙酮、氢气、乙醇、氨、乙醛和烯丙基硫醇。特别是，{100} CeO 纳米立方体形貌/SnO 纳米片和 {111} CeO 纳米八面体形貌/SnO 纳米片气体传感器对丙酮或烯丙基硫醇的响应分别比原始 SnO 纳米片气体传感器高 6.8 和 10.3 倍。此外，对氨气的传感器响应比商用挥发性有机化合物 (VOC) 气体传感器 (TGS2602，Figaro Engineering Inc.) 高 2.5 倍。CeO 纳米立方体形貌具有暴露的亚稳 {100} 面，由于亚稳 {100} 面的表面能较高，促进了 VOCs 的吸附和氧化，因此表现出比具有暴露 {111} 面的 CeO 纳米八面体形貌更高的传感性能。开发的传感器在用于疾病诊断的人体呼吸和汗液中的气体标志物检测方面显示出巨大的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb4/9802217/fded8bd2457e/am2c17444_0012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb4/9802217/fded8bd2457e/am2c17444_0012.jpg

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