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具有n-p导电转变的碳化硅纳米片的高温气敏性能

High temperature gas sensing performances of silicon carbide nanosheets with an n-p conductivity transition.

作者信息

Sun Lian, Han Cheng, Wu Nan, Wang Bing, Wang Yingde

机构信息

Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology Changsha 410073 China

出版信息

RSC Adv. 2018 Apr 12;8(25):13697-13707. doi: 10.1039/c8ra02164c. eCollection 2018 Apr 11.

DOI:10.1039/c8ra02164c
PMID:35539358
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9079785/
Abstract

Fast and effective detecting of flammable and explosive gases in harsh environments (high temperature, corrosion atmosphere) is crucial for preventing severe accidents for the chemical industry, fuel cell applications and engine tests. Silicon carbide material is reported to be a good candidate for gas sensing devices applied in extreme conditions. Herein, high-temperature available silicon carbide nanosheets (SiC NSs) were synthesized from graphene oxide (GO) a catalyst-free carbothermal method. The structure and composition of SiC NSs under different reaction conditions are carefully characterized. The received SiC NSs were firstly utilized as gas sensing materials for hazardous gases (acetone, ethanol, methanol and ammonia) at a high temperature (500 °C). Importantly, the SiC NSs sensors exhibited a fast response (8-39 s) and recovery (12-69 s) towards detecting gases. Besides, an n-p conductivity transition phenomenon is found and studied. This paper firstly proves that such SiC NSs has the potential to be used in gas sensing fields.

摘要

在恶劣环境（高温、腐蚀气氛）中快速有效地检测易燃、易爆气体对于预防化工、燃料电池应用和发动机测试中的严重事故至关重要。据报道，碳化硅材料是适用于极端条件下气体传感装置的良好候选材料。在此，通过无催化剂的碳热法由氧化石墨烯（GO）合成了可在高温下使用的碳化硅纳米片（SiC NSs）。仔细表征了不同反应条件下SiC NSs的结构和组成。所制备的SiC NSs首先被用作高温（500℃）下检测有害气体（丙酮、乙醇、甲醇和氨气）的气敏材料。重要的是，SiC NSs传感器对检测气体表现出快速响应（8 - 39秒）和恢复（12 - 69秒）。此外，发现并研究了n - p导电转变现象。本文首次证明了这种SiC NSs在气体传感领域具有应用潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/8a69e6f2fc71/c8ra02164c-f12.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/e25d7228d81a/c8ra02164c-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/88886275e002/c8ra02164c-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/9b719365f043/c8ra02164c-f9.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/8a69e6f2fc71/c8ra02164c-f12.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/71d1d4910db6/c8ra02164c-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/32d90b16d67d/c8ra02164c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/5afbc9b6b1ef/c8ra02164c-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/7e0a9508ddb7/c8ra02164c-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/8234ea9a0d0a/c8ra02164c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/fea127836a25/c8ra02164c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/7eb244f0c2b7/c8ra02164c-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/e25d7228d81a/c8ra02164c-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/88886275e002/c8ra02164c-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/9b719365f043/c8ra02164c-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/f8801dd475d7/c8ra02164c-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/1556605d540a/c8ra02164c-f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/873d/9079785/8a69e6f2fc71/c8ra02164c-f12.jpg

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