Please use this identifier to cite or link to this item:
Title: Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light
Author: Ovodok, Evgeni
Maltanava, Hanna
Poznyak, Sergey
Ivanovskaya, Maria
Kudlash, Alexander
Scharnagl, Nico
Tedim, João
Keywords: Titanium dioxide
Mesoporous materials
Issue Date: 2018
Publisher: Elsevier
Abstract: Mesoporous TiO2 powders with an anatase framework were synthesized through surfactant-assisted template method. The concentrated titania sol (7-8 wt.%) prepared from TiCl4 as a precursor was used in this synthesis. The soluble triblock copolymer Pluronic F127 was employed as a structure-directing agent and a carbon precursor to fabricate the carbon-doped mesoporous titania. The synthesized powders were characterized by XRD, HRTEM, Raman spectroscopy, UV-Vis reflectance spectroscopy, N2 adsorption/desorption and TG/DSC methods. The mesoporous titania annealed at 350° C was shown to have a high specific surface area up to 192 m2/g and a narrow pore size distribution. After annealing, carbon species in graphitic form were detected in the template-prepared TiO2 samples using Raman spectroscopy measurements. The photocatalytic performance of the samples was characterized in the process of Rhodamine B decomposition under visible light irradiation. The enhanced visible light photocatalytic efficiency of the template-prepared TiO2 powders as compared with that of Degussa P25 can be attributed to the associated effects of high specific surface area, pure anatase crystalline structure and carbon doping.
Peer review: yes
DOI: 10.1016/j.matpr.2018.06.044
Appears in Collections:CICECO - Artigos

Files in This Item:
File Description SizeFormat 
manuscript ID4- 2017Materials Today Proceedings.pdf695.54 kBAdobe PDFView/Open

Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.