石墨烯
氧化物
碳纤维
检出限
热解
燃烧
材料科学
纳米技术
化学工程
二氧化碳
碳酸钠
化学
复合数
钠
复合材料
有机化学
色谱法
工程类
作者
Qichao Dong,Zengyong Chu,Xiaofeng Gong,Min Xiao,Guochen Li,Zhenkai Zhao,Ye Zhang,Jiayu Dai,Tianjiao Hu,Zhenhua Jiang
出处
期刊:Carbon
[Elsevier]
日期:2022-05-01
卷期号:191: 164-174
被引量:2
标识
DOI:10.1016/j.carbon.2022.01.054
摘要
3D graphene is a promising candidate in high-performance gas sensing due to its unique porous structures. However, proper construction and finely regulation of the architecture for trace and fast detection of various gases is still challenging. Here, we propose a novel combustion approach to the construction of 3D reduced graphene oxide (RGO), which is incorporated in a sucrose-derived carbon framework, stretched out and spatially scaffolded by the skeleton. The composite foam was quickly bubbled from the mixture of sucrose, graphene oxide (GO) and sodium carbonate within a flame of ethanol. Sodium carbonate acts as a catalyst accelerating pyrolysis. The thickness of the RGO-based walls can be down to mono-layers. Toward detecting nitrogen dioxide (NO2), the limit of detection (LOD) of the rinsed foam is 17.8 ppb, which can be down to 0.7 ppb after a heat-treatment at 600 °C. The response time is also decreased to 100 s when measured toward 5 ppm NO2. This work not only demonstrates a simple and fast method to the building of 3D graphene, but also presents a promising candidate for the trace and fast detection of NO2 with high sensitivity and good selectivity.
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