title: Novel durable bio-photocatalyst purifiers, a non-heterogeneous mechanism: accelerated entrapped dye degradation into structural polysiloxane-shield nano-reactors.
abstract: This research has designed innovative Ag/TiO(2) polysiloxane-shield nano-reactors on the PET fabric to develop novel durable bio-photocatalyst purifiers. To create these very fine nano-reactors, oppositely surface charged multiple size nanoparticles have been applied accompanied with a crosslinkable amino-functionalized polysiloxane (XPs) emulsion. Investigation of photocatalytic dye decolorization efficiency revealed a non-heterogeneous mechanism including an accelerated degradation of entrapped dye molecules into the structural polysiloxane-shield nano-reactors. In fact, dye molecules can be adsorbed by both Ag and XPs due to their electrostatic interactions and/or even via forming a complex with them especially with silver NPs. The absorbed dye and active oxygen species generated by TiO(2) were entrapped by polysiloxane shelter and the presence of silver nanoparticles further attract the negative oxygen species closer to the adsorbed dye molecules. In this way, the dye molecules are in close contact with concentrated active oxygen species into the created nano-reactors. This provides an accelerated degradation of dye molecules. This non-heterogeneous mechanism has been detected on the sample containing all of the three components. Increasing the concentration of Ag and XPs accelerated the second step beginning with an enhanced rate. Further, the treated samples also showed an excellent antibacterial activity.
authors.affiliation: Textile Engineering Department, Yazd University, Yazd, Iran. nanobiotex.dastjerdi@yazduni.ac.ir
authors.forename: Roya
authors.initials: R
authors.lastname: Dastjerdi
authors.forename: Majid
authors.initials: M
authors.lastname: Montazer
authors.forename: Shadi
authors.initials: S
authors.lastname: Shahsavan
authors.forename: Horst
authors.initials: H
authors.lastname: Böttcher
authors.forename: M B
authors.initials: MB
authors.lastname: Moghadam
authors.forename: Jamal
authors.initials: J
authors.lastname: Sarsour
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry* / Q000302:isolation & purification; D003432:Cross-Linking Reagents; D006861:Hydrogen Peroxide / Q000737:chemistry; D007700:Kinetics; D008826:Microbial Sensitivity Tests; D053758:Nanoparticles; D036103:Nanotechnology; D016877:Oxidants / Q000737:chemistry; D010316:Particle Size; D010777:Photochemistry; D012833:Siloxanes / Q000737:chemistry*; D012834:Silver / Q000737:chemistry; D014025:Titanium / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D004396:Coloring Agents; D003432:Cross-Linking Reagents; D016877:Oxidants; D012833:Siloxanes; C009495:titanium dioxide; D012834:Silver; D006861:Hydrogen Peroxide; D014025:Titanium