基于碳纳米片/氧化锡复合材料的氨气气体传感器。

Gas sensors based on carbon nanoflake/tin oxide composites for ammonia detection.

机构信息

Nano & Bio Research Division, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 711-873, Republic of Korea.

Department of Advanced Materials Chemistry, College of Science and Technology, Dongguk University-Gyeongju, Gyeongju, Gyeongbuk 780-714, Republic of Korea.

出版信息

J Hazard Mater. 2014 Mar 15;268:110-4. doi: 10.1016/j.jhazmat.2013.12.049. Epub 2014 Jan 3.

DOI:10.1016/j.jhazmat.2013.12.049

PMID:24473403

Abstract

Carbon nanoflake (CNFL) was obtained from graphite pencil by using the electrochemical method and the CNFL/SnO2 composite material assessed its potential as an ammonia gas sensor. A thin film resistive gas sensor using the composite material was manufactured by the drop casting method, and the sensor was evaluated to test in various ammonia concentrations and operating temperatures. Physical and chemical characteristics of the composite material were assessed using SEM, TEM, SAED, EDS and Raman spectroscopy. The composite material having 10% of SnO2 showed 3 times higher sensor response and better repeatability than the gas sensor using pristine SnO2 nano-particle at the optimal temperature of 350°C.

摘要

碳纳米薄片（CNFL）是通过电化学方法从石墨铅笔中获得的，并且评估了 CNFL/SnO2 复合材料作为氨气传感器的潜力。使用复合材料通过滴铸法制造了薄膜电阻式气体传感器，并评估了该传感器在各种氨浓度和工作温度下的性能。使用 SEM、TEM、SAED、EDS 和拉曼光谱评估了复合材料的物理和化学特性。在 350°C 的最佳温度下，与使用原始 SnO2 纳米粒子的气体传感器相比，含有 10%SnO2 的复合材料的传感器响应提高了 3 倍，重复性更好。