TiO2 surface structure

Onishi, H., Fukui, K. and Iwasawa, Y. (1995) Atomic-scale surface structures of TiO2(110) determined by scanning tunneling microscopy A new surface-limited phase of titanium oxide. Bull. Chem. Soc. Jpn., 68, 2447—2458. 

In order to circumvent the addition of a hazardous air pollutant like TCE or PCE to generate enhanced removal of branched aromatics, d Hennezel and Ollis explored a catalyst pretreatment intended to introduce chlorine atoms into the surface structure of TiO2 photocatalysts. 

Bowker M, Stone P, Morrall P, et al. Model catalyst studies of the strong metal-support interaction surface structure identified by STM on Pd nanoparticles on TiO2(110). J Catal. 2005 234 172-81. 

In Fig. 15a, O atoms would move to the right and Ti atoms to the left. The net effect of these displacement is to increase the effective coordination of the 5-fold coordinated Ti atoms [109]. To my knowledge, no experimental data on relaxations of the TiO2(100)(lxl) surface exist. X-ray photoelectron and Auger electron diffraction were performed but are insensitive to the details of the surface structure [111]. 

Bennett RA, Pang CL, Perkins N, Smith RD, Morrall P, Kvon RI, Bowker M (2002) Surface structures in the SMSI state Pd on (1x2) reconstructed TiO2(110). J Phys Chem B 106 4688... 

Recently ALISS experiments and simple classical theory have been used to directly get the surface structure of TiO2(110) [41]. Figure 20 shows an unrelaxed stoichiometric Ti02 surface with bridging oxygen rows. 

Figure 18.1 Surface structure ofTi02(l 10) characterized by STM and non-contact atomic force microscope (NC-AFM). (a) An empty state STM image (7.3 x 7.3 nm2, Vs = 1.2 V, It = 0.15 nA) of a TiO2(110) surface at RT. (b) A structure model of a clean Ti02(l 10) surface. The fivefold coordinated Ti atoms are visualized, (c) A perspective view of a TiO2(110) surface with oxygen defect.

Fig. 5.1 Surface structure of various semiconductors a) Ge b) TiO2 c) ZnO d) layered dichalcogenides (MX2)...

Liang Y, Gan S, Chambers SA, Eltman El (2001) Surface structure of anatase TiO2(001) reconstruction, atomic steps, and domains. Phys Rev B 63 303-306... 

Materials. The titanium dioxide powders were rutile in structure (obtained from the Titanium Division, National Lead Co., Amboy, N. J.), with nominal specific surface areas of 10 and of 100 sq. meters per gram. Chemical analysis by the supplier showed negligible impurities except for 0.8% sodium oxide in the Ti02-100 and traces of iron in both the TiO2-10 and the TiO2-100. The presence of iron was confirmed by the nature of the decay of the neutron irradiation—induced radioactivities. 

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