BTEX adsorption on TiO2 anatase and rutile surfaces: DFT functionals

  • Marcos dos Reis Vargas
  • Elton A. S. de Castro
  • José R. dos S. Politi
  • Ricardo Gargano
  • João B. L. MartinsEmail author
Original Paper
Part of the following topical collections:
  1. VII Symposium on Electronic Structure and Molecular Dynamics – VII SeedMol


Benzene, toluene, ethylbenzene, and xylenes are volatile hydrocarbons known as BTEX, which present concerns about environmental problems. Density functional theory (DFT) functionals were used for the BTEX gas phase adsorption on TiO2 (110) of rutile and (101) of anatase surfaces. Dispersion terms have shown the importance to treat weak interactions and were used to study these adsorptions using plane wave DFT calculations. All BTEX molecules have the same trend for the adsorption on rutile and anatase surfaces. The inclusion of dispersion terms has a significant contribution for the interaction energy. Density of states results suggest the hybridization between the d state of pentacoordinated titanium atoms (Ti5C) and carbon p states of benzene. The adsorption energy values indicate an effective interaction between the BTEX and surfaces, mainly due to the aromatic π interaction, which is present in all adsorbates. However, for p-xylene the methyl hydrogen directs the second major influence.

Graphical abstract

Charge difference showing the system with the smallest interaction and the one with the largest interaction


Adsorption Plane wave BTEX 



The authors are indebted to the financial support of FAPDF, CNPq, and CAPES and the computational support of CENAPAD/SP and UnB/FINEP Institute of Chemistry Computational Centre.

Supplementary material

894_2019_4027_MOESM1_ESM.docx (13 kb)
ESM 1 (DOCX 13 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute of ChemistryUniversity of BrasiliaBrasíliaBrazil
  2. 2.Federal Institute of GoiásGoiâniaBrazil
  3. 3.State University of GoiásFormosaBrazil
  4. 4.Institute of PhysicsUniversity of BrasiliaBrasíliaBrazil
  5. 5.Instituto de QuímicaUniversidade de BrasíliaBrasíliaBrazil

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