2024-03-28T11:09:09Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1630682018-04-04T00:56:38Zcom_10261_101com_10261_5col_10261_354
DIGITAL.CSIC
author
Cámara, R. M.
author
Crespo, E.
author
Portela, Raquel
author
Suárez Gil, Silvia
author
Bautista, L.
author
Gutiérrez-Martín, F.
author
Sánchez, Benigno
funder
Ministerio de Economía y Competitividad (España)
2018-04-03T09:37:33Z
2018-04-03T09:37:33Z
2014-07
Catalysis Today 230: 145-151 (2014)
0920-5861
http://hdl.handle.net/10261/163068
10.1016/j.cattod.2013.10.049
http://dx.doi.org/10.13039/501100003329
Organic polymers are excellent substrates for photocatalytic applications of TiO2 thin films, which can be easily prepared by sol–gel synthesis followed by dip coating. However, the wettability of the hydrophobic surface of polymers should be improved. In this work, commercial poly(vinyl chloride) (PVC), poly(methyl methacrylate) (PMMA) and polystyrene (PS) were selected according to their high transmittance in the TiO2 activation range for the immobilization of the semiconductor. Low pressure (LPP) and atmospheric pressure (APP) plasma were used to modify the surface properties of the organic polymers to improve the affinity for TiO2 aqueous sols and solutions. The characterization of the materials was performed by atomic force microscopy (AFM), UV–Vis spectroscopy, and contact angle and surface tension measurements, employed to evaluate wettability of the samples. The effect of the power of discharge and treatment time on the induced surface properties was analyzed. LPP at 300 W during 600 s was found as adequate treatment to promote the hydrophilicity of all samples without damage to the bulk. The adhesion of TiO2 thin films on the polymers was improved with the plasma pre-treatment due to the generation of roughness and specific polar functional groups. Accordingly, the photocatalytic performance increased with respect to the non-treated substrates, reaching similar conversion values than the reference photocatalyst where glass, a hydrophilyc substrate, was used as support.
eng
closedAccess
Plasma
TiO2
Polymer
Photocatalysis
Trichloroethylene
Enhanced photocatalytic activity of TiO2 thin films on plasma-pretreated organic polymers
artículo
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URL
https://digital.csic.es/bitstream/10261/163068/1/accesoRestringido.pdf
File
MD5
42637ae8545636bc41605c1740a9a84e
15753
application/pdf
accesoRestringido.pdf