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论文类型：期刊论文

发表时间：2016-01-01

发表刊物：RSC ADVANCES

收录刊物：SCIE、EI

卷号：6

期号：57

页面范围：52339-52346

ISSN号：2046-2069

摘要：Three methods were used to prepare reduced graphene oxide (rGO) with various ratios of oxygen functional groups, such as -OOH, -OH and C=O, to study their effects on the NO2 sensing properties at room temperature. It was found that the percentages of oxygen-containing species such as -OH in the rGO nanosheet, significantly affected the sensitivity of rGO to NO2 at room temperature. The -OH species can promote the sensitivity and also the recovery ability with respect to NO2. This may be because -OH has a greater attraction to NO2 and obtains electrons from it, whereas the separation of NO2 from -OH is also slightly easier, enabling a better recovery compared to other oxygen functional groups such as -OOH and C=O.