Abstract
A facile and easily up-scalable method for the preparation of catalytically active TiO2doped cellulose membranes has been developed.
Highlights
Cellulose is one of the most widely available natural polymers and together with its derivatives has already many established areas of applicability such as in paper manufacturing,[1] arti cial bers and textiles,[2,3] membranes for water puri cation[4,5] and/or biomedical analyses and therapies.[6,7] Cellulose-based materials with new functionalities have continuously attracted the interest of chemistry researchers, following the current trends to utilize renewable and environmentally friendly, One of the materials with a huge role in nanoscience and nanotechnology is TiO2
In one of our previous works we reported on two alternative routes which facilitate the preparation of catalytically active cellulose membranes using commercial TiO2 nanoparticles as active functional material: one starting with cellulose solutions in ionic liquids and the second starting with cellulose acetate solutions in conventional solvents.[39]
The potential offered by the two step and the one step preparation methods of TiO2 doped porous cellulose nanocomposites, starting with nanoparticle dispersions in cellulose acetate solutions in organic solvents, had been 88076 | RSC Adv., 2015, 5, 88070–88078
Summary
Cellulose is one of the most widely available natural polymers and together with its derivatives has already many established areas of applicability such as in paper manufacturing,[1] arti cial bers and textiles,[2,3] membranes for water puri cation[4,5] and/or biomedical analyses and therapies.[6,7] Cellulose-based materials with new functionalities have continuously attracted the interest of chemistry researchers, following the current trends to utilize renewable and environmentally friendly, One of the materials with a huge role in nanoscience and nanotechnology is TiO2. Among its main areas of applications worth mentioning are catalysis,[16] solar cells,[17] pigments,[18] corrosion protection[19] or optical coatings.[20] TiO2 is one of the mostly used photocatalysts for the decomposition of organic and inorganic contaminants like Cr(VI) in wastewater due to its superior properties: high chemical stability, low toxicity and low 88070 | RSC Adv., 2015, 5, 88070–88078. Paper cost.[21,22] Widespread are three polymorphic forms of TiO2: anatase, rutile and brookite, and some commercial powders usually consist of mixtures of anatase and rutile. The bandgap of rutile is $3.0 eV and that of anatase is $3.2 eV.[23] Generally it is considered that in pure form anatase exhibits superior photocatalytic activity.[24] In depth studies have demonstrated that phase mixtures of different TiO2 polymorphs have increased photocatalytic activity when compared with pure phases.[25]
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