Enhanced photocatalytic activity of TiO2 films by modification with polyethylene glycol

Quimica nova

Ramírez-Santos, Álvaro A.¹  Acevedo-Peña, Próspero¹  Córdoba, Elcy M.¹ 

[1] Universidad Industrial de Santander, Santander, Colombia

关键词: polyethylene glycol (PEG);    photocatalysis;    TiO2 films. ;     ;    INTRODUCTION;   

DOI  :  10.1590/S0100-40422012001000008

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Titanium dioxideporous thin films on the Anatase phase were deposited onto glass slides by thesol-gel method assisted with polyethylene glycol (PEG). The dip-coated filmswere characterized using scanning electron microscopy (SEM), thermogravimetricanalysis (TGA and DTG), UV-visible spectroscopy and X-ray diffraction (XRD).The photocatalytic activity of the films was determined by means of methyl-orangeoxidation tests. The resultant PEG-modified films were crack-free and developeda porous structure after calcination at 500 °C. Photo-oxidation testsshowed the dependency of catalytic activity of the films on the number of layers(thickness) and porosity, i.e. of the interfacial area.

【 授权许可】

CC BY