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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of TiO2 surface modification in Rhodamine B photodegradation

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Author(s):
Libanori, Rafael [1] ; Giraldi, Tania R. [2] ; Longo, Elson [3] ; Leite, Edson R. [1] ; Ribeiro, Caue [2]
Total Authors: 5
Affiliation:
[1] CMDMC LIEC UFSCar, BR-13565905 Sao Carlos, SP - Brazil
[2] Embrapa Instrumentacao Agropecuaria, BR-13560970 Sao Carlos, SP - Brazil
[3] UNESP, LIEC, CMDMC, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Sol-Gel Science and Technology; v. 49, n. 1, p. 95-100, JAN 2009.
Web of Science Citations: 50
Abstract

Commercial TiO(2) nanoparticles were superficially modified through polymeric resins obtained from polymerization of citrate complexes of Y(3+) and Al(3+) with ethylenglycol. The materials were treated at 450 A degrees C for 4 h to obtain modified nanoparticles, which were characterized by HR-TEM, Zeta potential and surface area through N(2) fisisorption. Rhodamine B photodegradation by visible light irradiation and in presence of those modified nanoparticles was compared with the same process in presence of unmodified commercial TiO(2) nanoparticles. It was observed, by UV-visible spectroscopy, that the catalytic photoactivity in presence of modified nanoparticles was smaller than that observed with commercial TiO(2) nanoparticles. However, the surface modifier played an important role in the photodegradation kinetic process, showing a non-linear relation between modifier amount and photodegradation rate, presenting a maximum value at 0.8% (w/w). (AU)