title: Titania Composites with 2 D Transition Metal Carbides as Photocatalysts for Hydrogen Production under Visible-Light Irradiation.
abstract: MXenes, a family of two-dimensional transition-metal carbides, were successfully demonstrated as co-catalysts with rutile TiO2 for visible-light-induced solar hydrogen production from water splitting. The physicochemical properties of Ti3 C2 Tx MXene coupled with TiO2 were investigated by a variety of characterization techniques. The effect of the Ti3 C2 Tx loading on the photocatalytic performance of the TiO2 /Ti3 C2 Tx composites was elucidated. With an optimized Ti3 C2 Tx content of 5 wt %, the TiO2 /Ti3 C2 Tx composite shows a 400 % enhancement in the photocatalytic hydrogen evolution reaction compared with that of pure rutile TiO2 . We also expanded our exploration to other MXenes (Nb2 CTx and Ti2 CTx ) as co-catalysts coupled with TiO2 , and these materials also exhibited enhanced hydrogen production. These results manifest the generality of MXenes as effective co-catalysts for solar hydrogen production.
authors.affiliation: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA. wangh1@ornl.gov.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.affiliation: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
authors.forename: Rui
authors.initials: R
authors.lastname: Peng
authors.affiliation: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.|School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
authors.forename: Zachary D
authors.initials: ZD
authors.lastname: Hood
authors.affiliation: Materials Science Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Naguib
authors.affiliation: Department of Chemistry, Wake Forest University, Winston-Salem, NC, 27109, USA.
authors.forename: Shiba P
authors.initials: SP
authors.lastname: Adhikari
authors.affiliation: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA. wuz1@ornl.gov.
authors.forename: Zili
authors.identifier: 0000-0002-4468-3240
authors.initials: Z
authors.lastname: Wu
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D006859:Hydrogen / Q000737:chemistry*; D008027:Light; D009556:Niobium / Q000737:chemistry*; D055668:Photochemical Processes; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D009556:Niobium; D014867:Water; C009495:titanium dioxide; D002244:Carbon; D006859:Hydrogen; D014025:Titanium
keywords: carbides; hydrogen; photochemistry; titanium; water splitting