000140560 001__ 140560
000140560 005__ 20180913055405.0
000140560 0247_ $$2doi$$a10.1016/j.apcatb.2009.06.017
000140560 02470 $$2ISI$$a000269374400058
000140560 037__ $$aARTICLE
000140560 245__ $$aSelf-cleaning modified TiO2-cotton pretreated by UVC-light (185 nm) and RF-plasma in vacuum and also under atmospheric pressure
000140560 269__ $$a2009
000140560 260__ $$c2009
000140560 336__ $$aJournal Articles
000140560 520__ $$aTwo new innovative findings presented in this study are: (a) TiO2-cotton fabrics obtained by pretreatment with UVC-light (185nm) at atmospheric pressure introduced functionalities into the cotton surface enabling the chelation/binding of TiO2. This was possible since the molar absorption coefficient of O-2 and N-2 is very low at 185 nm and (b) the radiofrequency (RF-plasma) pretreatment of cotton surface lead to the formation active binding sites on the cotton at atmospheric pressure. This unexpected RF effect was due to the drastic localized heating of the cotton leading to intermolecular H-bond breaking between the cellulose surface-OH groups of adjacent molecules with the formation of functionalized groups in the cellulose fibers. The discoloration kinetics of the wine stain on the TiO2-cotton pretreated by RF at atmospheric pressure for 10 min was the most favorable. The red wine stains discoloration under Suntest simulated light was monitored by diffuse reflectance spectroscopy (DRS) and by the CO2 evolution during the stain mineralization. By X-ray photoelectron spectroscopy (XPS) it was possible to monitor the decrease of the C, N, S-species on the textile topmost layers during the discoloration process. The XPS Ti 2p(3/2) peak shifts indicating Ti4+/Ti3+ oxido-reduction taking place during the photocatalysis. X-ray diffraction showed the formation of the anatase phase on the cotton. By X-ray fluorescence the loading of TiO2 before and after the discoloration process was found to be similar to 0.8%. High-resolution electron microscopy (HRTEM) shows transparent TiO2 anatase 8-18 nm coating the cotton with layers similar to 31 nm (+/- 10%). These 3-4 TiO2 layers on the cotton did not affect the touch or handling properties of the cotton enabling the potential commercial use of the TiO2-cotton fabrics. (C) 2009 Elsevier B.V. All rights reserved.
000140560 6531_ $$aRF-plasma
000140560 6531_ $$aUVC-light
000140560 6531_ $$aPhotocatalysis
000140560 6531_ $$aSelf-cleaning
000140560 6531_ $$aWine stains
000140560 6531_ $$aCotton fabrics
000140560 6531_ $$aTiO2
000140560 6531_ $$aModified Cotton Textiles
000140560 6531_ $$aEscherichia-Coli
000140560 6531_ $$aPhotocatalytic Degradation
000140560 6531_ $$aTitanium-Dioxide
000140560 6531_ $$aDaylight Irradiation
000140560 6531_ $$aIndoor Ammonia
000140560 6531_ $$aVisible-Light
000140560 6531_ $$aTio2 Powders
000140560 6531_ $$aThin-Films
000140560 6531_ $$aAzo-Dye
000140560 700__ $$aMejía, M.I.
000140560 700__ $$aMarín, J.M.
000140560 700__ $$aRestrepo, G.
000140560 700__ $$0240005$$aPulgarin, C.$$g106159
000140560 700__ $$aMielczarski, E.
000140560 700__ $$aMielczarski, J.
000140560 700__ $$aArroyo, Y.
000140560 700__ $$aLavanchy, J.C.
000140560 700__ $$0240006$$aKiwi, J.$$g105552
000140560 773__ $$j91$$k1-2$$q481-488$$tApplied Catalysis B, Environmental
000140560 909C0 $$0252422$$pGPAO$$xU12575
000140560 909CO $$ooai:infoscience.tind.io:140560$$pSB$$particle
000140560 937__ $$aGGEC-ARTICLE-2009-028
000140560 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000140560 980__ $$aARTICLE