Electronic signatures of a model pollutant-particle system: chemisorbed phenol on TiO₂(110)

Langmuir : the ACS Journal of Surfaces and Colloids
Matthew C PattersonPhillip T Sprunger

Abstract

Environmentally persistent free radicals (EPFRs) are a class of composite organic/metal oxide pollutants that have recently been discovered to form from a wide variety of substituted benzenes chemisorbed to commonly encountered oxides. Although a qualitative understanding of EPFR formation on particulate metal oxides has been achieved, a detailed understanding of the charge transfer mechanism that must accompany the creation of an unpaired radical electron is lacking. In this study, we perform photoelectron spectroscopy and electron energy loss spectroscopy on a well-defined model system-phenol chemisorbed on TiO2(110) to directly observe changes in the electronic structure of the oxide and chemisorbed phenol as a function of adsorption temperature. We show strong evidence that, upon exposure at high temperature, empty states in the TiO2 are filled and the phenol HOMO is depopulated, as has been proposed in a conceptual model of EPFR formation. This experimental evidence of charge transfer provides a deeper understanding of the EPFR formation mechanism to guide future experimental and computational studies as well as potential environmental remediation strategies.

References

Dec 13, 2006·Physical Review Letters·Cristiana Di ValentinAnnabella Selloni
Jul 22, 2008·Chemosphere·Slawomir LomnickiBarry Dellinger
Aug 6, 2008·Environmental Science & Technology·Slawo LomnickiBarry Dellinger
Jan 7, 2009·Journal of the American Chemical Society·Shao-Chun LiUlrike Diebold
Feb 26, 2009·Environmental Science & Technology·Shadrack NganaiBarry Dellinger
Apr 21, 2009·Particle and Fibre Toxicology·Shrilatha BalakrishnaStephania A Cormier
Dec 17, 2009·Journal of the American Chemical Society·Shao-Chun Li, Ulrike Diebold
Apr 7, 2010·Environmental Toxicology and Pharmacology·Baher FahmyStephania A Cormier
Nov 27, 2010·Physical Chemistry Chemical Physics : PCCP·R Sánchez-de-ArmasJ F Sanz
Dec 23, 2010·Environmental Science & Technology·Shadrack NganaiBarry Dellinger
May 6, 2011·Journal of the American Chemical Society·Li-Min LiuAnnabella Selloni
Jun 22, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Shao-Chun LiUlrike Diebold
Jul 8, 2011·Environmental Science & Technology·Albert Leo N dela CruzBarry Dellinger
Aug 10, 2011·Environmental Science & Technology·Lavrent KhachatryanBarry Dellinger
Sep 29, 2011·Environmental Science & Technology·Lavrent Khachatryan, Barry Dellinger
Mar 5, 2013·Physical Chemistry Chemical Physics : PCCP·Stephen C JensenCynthia M Friend
Jan 21, 2014·Chemical Physics·Matthew C PattersonPhillip T Sprunger
May 16, 2014·Chemistry : a European Journal·Peter M ClawinKatharina Al-Shamery
Aug 26, 2014·The Journal of Chemical Physics·D B JonesM J Brunger

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Citations

Sep 10, 2016·Environmental Science & Technology·Niveen W AssafBogdan Z Dlugogorski
Feb 26, 2021·The Science of the Total Environment·Ziyu ZhaoBaoshan Xing
Dec 4, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Nadra I SakrPhillip T Sprunger

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