Defect Functionalization of MoS2 nanostructures as toxic gas sensors: A review

2nd International Conference on Advanced Materials

Ramanathan, A.A.^1

Department of Physics, University of Jordan, Amman

11942, Jordan^1

关键词: Defect engineering;    Doping strategies;    Functionalizations;    Layered Structures;    Molybdenum disulphide;    MSNs;    Sensor applications;    Toxic air pollutants;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/305/1/012001/pdf
DOI  :  10.1088/1757-899X/305/1/012001

来源: IOP

【 摘 要 】

Toxic gas sensing plays an important role in many parts of our life from environmental protection, human health, agriculture to biomedicine. The importance of detecting toxic gases in the environment cannot be minimised in today's highly polluted world and the reality of global warming. Carbon monoxide and NO gas are highly toxic air pollutants and can cause serious health problems. Therefore, materials able to detect these toxic gases are urgently needed. Doping and defect substitution is a versatile and new tool for changing the chemical and electronic properties of 2D layered materials and boosting the applications of these materials. Molybdenum disulphide (MoS2) as a 2D layered material has unique properties and applications due its semiconducting nature, bandgap and layered structure. In the past decade, although, extensive research of Graphene as a gas sensor was conducted, the zero bandgap limited its potential and applicability. This is overcome in MoS2 nanostructures (MSNs) and the current focus is defect engineering of MSNs. The large surface to volume ratio, bandgap and cheapness makes MSNs very attractive for gas sensor applications. The idea is fuelled by the recent finding of Ding et al [16] of successful doping strategies on monolayer MoS2for enhanced NO detection. Moreover, the work of Luo et al [17] shows that substitutional doping is the new way of boosting and engineering the properties of ML MoS2. A short and focused report in this exciting field is presented in this review.