Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid

A versatile layer-by-layer (LbL) procedure for the preparation of highly dispersed, adherent and porous multilayer films of TiO 2 nanoparticles (NPs) and phosphotungstic acid (HPW) on a variety of substrates at room temperature was developed based on the use of cellulose phosphate (CP) as an efficie...

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Autor principal:	Aldabe Bilmes, Sara Alfonsina Dora
Publicado:	2013
Materias:	Cellulose phosphate Layer-by-Layer Photocatalysis Photochromism Titania Phosphotungstic acid Absorption spectroscopy Aromatic compounds Boron carbide Cellulose Cellulose films Crystal atomic structure Crystalline materials Dyes Film preparation Fourier transform infrared spectroscopy Interfaces (materials) Irradiation Nanocomposite films Oxide minerals Polyelectrolytes Titanium dioxide X ray photoelectron spectroscopy Adsorption ability Bacterial cellulose Environmentally safe Interfacial electron transfer Layer by layer Phosphotungstic acid TiO2 nano-particles Multilayer films Aromatic Compounds Boron Compounds Catalysts Cellulose Derivatives Fourier Analysis Interfaces Oxides Titanium Dioxide
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01694332_v277_n_p111_Ullah http://hdl.handle.net/20.500.12110/paper_01694332_v277_n_p111_Ullah
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	paper:paper_01694332_v277_n_p111_Ullah2023-06-08T15:18:21Z Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid Aldabe Bilmes, Sara Alfonsina Dora Cellulose phosphate Layer-by-Layer Photocatalysis Photochromism Titania Phosphotungstic acid Absorption spectroscopy Aromatic compounds Boron carbide Cellulose Cellulose films Crystal atomic structure Crystalline materials Dyes Film preparation Fourier transform infrared spectroscopy Interfaces (materials) Irradiation Nanocomposite films Oxide minerals Photocatalysis Photochromism Polyelectrolytes Titanium dioxide X ray photoelectron spectroscopy Adsorption ability Bacterial cellulose Cellulose phosphate Environmentally safe Interfacial electron transfer Layer by layer Phosphotungstic acid TiO2 nano-particles Multilayer films Aromatic Compounds Boron Compounds Catalysts Cellulose Derivatives Fourier Analysis Interfaces Oxides Titanium Dioxide A versatile layer-by-layer (LbL) procedure for the preparation of highly dispersed, adherent and porous multilayer films of TiO 2 nanoparticles (NPs) and phosphotungstic acid (HPW) on a variety of substrates at room temperature was developed based on the use of cellulose phosphate (CP) as an efficient and non-conventional polyelectrolyte. UV/vis absorption spectroscopy confirmed the linear and regular growth of the films with the number of immersion cycles and a strong adsorption ability of CP towards TiO 2 NPs. FTIR spectroscopy showed that HPW binds to the surface of TiO 2 through the oxygen atom at the corner of the Keggin structure. XPS results showed that the interaction between TiO 2 and CP is through Ti-O-P linkage. A model is proposed for the TiO 2 -HPW interaction based on XPS and FTIR results. FEG/SEM study of the surface morphology revealed a porous film structure with a homogenous distribution of the TiO 2 NPs induced by CP. HRTEM studies showed that the resulting composite films consist of crystalline anatase and rutile phases and poly-nano-crystalline HPW with a semi-crystalline TiO 2 -HPW interface. These CP/TiO 2 and CP/TiO 2 /HPW LbL films showed good photoactivity against both saturated and unsaturated species, for instance, stearic acid (SA), crystal violet (CV) and methylene blue (MB) under UV irradiation. The CP/HPW films formed on bacterial cellulose (BC) showed good photochromic response which is enhanced in presence of TiO 2 due to an interfacial electron transfer from TiO 2 to HPW. This simple and environmentally safe method can be used to form coatings on a variety of surfaces with photoactive TiO 2 and TiO 2 /HPW films. © 2013 Elsevier B.V. All rights reserved. Fil:Bilmes, S.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01694332_v277_n_p111_Ullah http://hdl.handle.net/20.500.12110/paper_01694332_v277_n_p111_Ullah
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cellulose phosphate Layer-by-Layer Photocatalysis Photochromism Titania Phosphotungstic acid Absorption spectroscopy Aromatic compounds Boron carbide Cellulose Cellulose films Crystal atomic structure Crystalline materials Dyes Film preparation Fourier transform infrared spectroscopy Interfaces (materials) Irradiation Nanocomposite films Oxide minerals Photocatalysis Photochromism Polyelectrolytes Titanium dioxide X ray photoelectron spectroscopy Adsorption ability Bacterial cellulose Cellulose phosphate Environmentally safe Interfacial electron transfer Layer by layer Phosphotungstic acid TiO2 nano-particles Multilayer films Aromatic Compounds Boron Compounds Catalysts Cellulose Derivatives Fourier Analysis Interfaces Oxides Titanium Dioxide
spellingShingle	Cellulose phosphate Layer-by-Layer Photocatalysis Photochromism Titania Phosphotungstic acid Absorption spectroscopy Aromatic compounds Boron carbide Cellulose Cellulose films Crystal atomic structure Crystalline materials Dyes Film preparation Fourier transform infrared spectroscopy Interfaces (materials) Irradiation Nanocomposite films Oxide minerals Photocatalysis Photochromism Polyelectrolytes Titanium dioxide X ray photoelectron spectroscopy Adsorption ability Bacterial cellulose Cellulose phosphate Environmentally safe Interfacial electron transfer Layer by layer Phosphotungstic acid TiO2 nano-particles Multilayer films Aromatic Compounds Boron Compounds Catalysts Cellulose Derivatives Fourier Analysis Interfaces Oxides Titanium Dioxide Aldabe Bilmes, Sara Alfonsina Dora Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
topic_facet	Cellulose phosphate Layer-by-Layer Photocatalysis Photochromism Titania Phosphotungstic acid Absorption spectroscopy Aromatic compounds Boron carbide Cellulose Cellulose films Crystal atomic structure Crystalline materials Dyes Film preparation Fourier transform infrared spectroscopy Interfaces (materials) Irradiation Nanocomposite films Oxide minerals Photocatalysis Photochromism Polyelectrolytes Titanium dioxide X ray photoelectron spectroscopy Adsorption ability Bacterial cellulose Cellulose phosphate Environmentally safe Interfacial electron transfer Layer by layer Phosphotungstic acid TiO2 nano-particles Multilayer films Aromatic Compounds Boron Compounds Catalysts Cellulose Derivatives Fourier Analysis Interfaces Oxides Titanium Dioxide
description	A versatile layer-by-layer (LbL) procedure for the preparation of highly dispersed, adherent and porous multilayer films of TiO 2 nanoparticles (NPs) and phosphotungstic acid (HPW) on a variety of substrates at room temperature was developed based on the use of cellulose phosphate (CP) as an efficient and non-conventional polyelectrolyte. UV/vis absorption spectroscopy confirmed the linear and regular growth of the films with the number of immersion cycles and a strong adsorption ability of CP towards TiO 2 NPs. FTIR spectroscopy showed that HPW binds to the surface of TiO 2 through the oxygen atom at the corner of the Keggin structure. XPS results showed that the interaction between TiO 2 and CP is through Ti-O-P linkage. A model is proposed for the TiO 2 -HPW interaction based on XPS and FTIR results. FEG/SEM study of the surface morphology revealed a porous film structure with a homogenous distribution of the TiO 2 NPs induced by CP. HRTEM studies showed that the resulting composite films consist of crystalline anatase and rutile phases and poly-nano-crystalline HPW with a semi-crystalline TiO 2 -HPW interface. These CP/TiO 2 and CP/TiO 2 /HPW LbL films showed good photoactivity against both saturated and unsaturated species, for instance, stearic acid (SA), crystal violet (CV) and methylene blue (MB) under UV irradiation. The CP/HPW films formed on bacterial cellulose (BC) showed good photochromic response which is enhanced in presence of TiO 2 due to an interfacial electron transfer from TiO 2 to HPW. This simple and environmentally safe method can be used to form coatings on a variety of surfaces with photoactive TiO 2 and TiO 2 /HPW films. © 2013 Elsevier B.V. All rights reserved.
author	Aldabe Bilmes, Sara Alfonsina Dora
author_facet	Aldabe Bilmes, Sara Alfonsina Dora
author_sort	Aldabe Bilmes, Sara Alfonsina Dora
title	Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
title_short	Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
title_full	Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
title_fullStr	Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
title_full_unstemmed	Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
title_sort	photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01694332_v277_n_p111_Ullah http://hdl.handle.net/20.500.12110/paper_01694332_v277_n_p111_Ullah
work_keys_str_mv	AT aldabebilmessaraalfonsinadora photoactivelayerbylayerfilmsofcellulosephosphateandtitaniumdioxidecontainingphosphotungsticacid
_version_	1768545461911683072

Photoactive layer-by-layer films of cellulose phosphate and titanium dioxide containing phosphotungstic acid

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