TY - JOUR
T1 - Photoelectrochemical properties of sol-gel synthesized titanium dioxide nano-particles using different acids
T2 - X-ray photoelectron spectroscopy reveals the induced effect of hydrolysis precursor
AU - Manzo-Robledo, A.
AU - Cruz-López, Arquímedes
AU - Caballero, A. A.Flores
AU - Zaldívar-Cadena, Antonio A.
AU - López, Máximo
AU - Vázquez-Cuchillo, O.
N1 - Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.
PY - 2015/3/1
Y1 - 2015/3/1
N2 - Properties such as crystalline structure (X-ray diffraction - XRD), surface chemistry-electronic states (X-ray photoelectron spectroscopy - XPS), morphology and particle size-distribution (Transmission Electron Microscopy - TEM), electronic structure-band-gap (UV-vis spectroscopy) and surface area (BET-nitrogen physisorption) were analyzed for titanium dioxide (TiO2)-semiconductor-surfaces synthesized by sol-gel route using nitric, acetic and phosphoric acids as hydrolysis precursors. According to XRD analysis, it was established that anatase phase has been obtained with a particle size linked to the acid of hydrolysis employed (i.e. dissociation constant), as also demonstrated by TEM and area BET. On the other hand, using XPS, a shift toward lower binding energies was observed from TiO2obtained using HNO3promoting some structural modification and the reduction in the band-gap, inducing a better faradic current-performance by decreasing charge-transfer resistance during polarization and at induced-generated photocurrent using UV-light.
AB - Properties such as crystalline structure (X-ray diffraction - XRD), surface chemistry-electronic states (X-ray photoelectron spectroscopy - XPS), morphology and particle size-distribution (Transmission Electron Microscopy - TEM), electronic structure-band-gap (UV-vis spectroscopy) and surface area (BET-nitrogen physisorption) were analyzed for titanium dioxide (TiO2)-semiconductor-surfaces synthesized by sol-gel route using nitric, acetic and phosphoric acids as hydrolysis precursors. According to XRD analysis, it was established that anatase phase has been obtained with a particle size linked to the acid of hydrolysis employed (i.e. dissociation constant), as also demonstrated by TEM and area BET. On the other hand, using XPS, a shift toward lower binding energies was observed from TiO2obtained using HNO3promoting some structural modification and the reduction in the band-gap, inducing a better faradic current-performance by decreasing charge-transfer resistance during polarization and at induced-generated photocurrent using UV-light.
KW - Dissociation constant
KW - Electronic states
KW - Nano-particles
KW - Photo-electrochemistry
KW - Semiconductors
KW - Titanium dioxide
UR - http://www.scopus.com/inward/record.url?scp=84978105231&partnerID=8YFLogxK
U2 - 10.1016/j.mssp.2014.11.020
DO - 10.1016/j.mssp.2014.11.020
M3 - Artículo
SN - 1369-8001
VL - 31
SP - 94
EP - 99
JO - Materials Science in Semiconductor Processing
JF - Materials Science in Semiconductor Processing
ER -