DFT investigation of O2 and PH3 adsorptions on group 8B metal˗doped boron nitride nanotubes

Banchob Wanno, Ployvadee Sripadung, Nadtanet Nunthaboot

Abstract


The adsorptions of O2 and PH3 molecules on boron nitride nanotube (BNNT) with and without the doping of group 8B metals (TM) i.e. Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, and Pt were investigated using a density functional theory calculation at the B3LYP/LanL2DZ theoretical level. The structural and electronic properties and adsorption abilities for the most stable configuration of gas adsorption on pristine and TM–BNNTs were calculated. The results indicate that the O2 and PH3 molecules show much stronger adsorption on the TM–BNNTs than that on the pristine BNNT. These observations clearly imply that pristine BNNT is not suitable for gas sensing, while the OsB–BNNT displays the highest interaction for O2 adsorption and the PtB–BNNT displays the highest interaction for PH3 adsorption. The electronic properties such as the energy gaps, partial change transfer, and density of states of TM–BNNTs are significantly modified after adsorptions. In conclusion, the TM–BNNTs can be used as O2 and PH3 gas storage and sensing in manufacturing raw materials.

Keywords


Adsorption, Boron nitride nanotube, DFT, Transition metal

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SCIENCE  AND  TECHNOLOGY  RMUTT  JOURNAL
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