Journal
APPLIED SURFACE SCIENCE
Volume 425, Issue -, Pages 340-350Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2017.06.229
Keywords
Phosgene; Transition metal doped graphene; Adsorption; Optical and electrical properties; Sensor; DFT
Categories
Funding
- National Natural Science Foundation of China [21647007, 51203016]
- Science and Technology Development Planning of Jilin Province [20140520087JH]
- Science and Technology Research Program of Education Department of Jilin Province [[2014]B044]
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The adsorption of the phosgene molecule on pristine graphene and transition metal doped (TM = Zr, Mo, Ti, Mn, Fe, Co) graphene is investigated using the first principles method based on density functional theory. The nature of interaction between the phosgene molecule and pristine graphene or transition metal doped graphene (TM-doped graphene) is discovered by geometries, adsorption energies, Mulliken charge distribution, density of states analysis and UV spectrum. Computational results show that the interaction between the phosgene molecule and pristine graphene is a weak physisorption. But doping with transition metals results in stronger chemical adsorption. This is due to the formation of a chemical bond between the metal atom and oxygen atom of phosgene, which makes TM-doped graphene really promising material for phosgene removal. TM-doped graphene also exhibits different electronic properties after adsorbing phosgene, compared with pristine graphene. Furthermore, the calculations reveal that UV spectrum of the TM-doped graphene is modified by the phosgene adsorption. Thus, the significant variations in electronic and optical properties of the TM-doped graphene sheet as interacting with the phosgene can be utilized to detect the phosgene. (C) 2017 Elsevier B.V. All rights reserved.
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