Photocatalytic self-cleaning properties of cellulosic fibers modified by nano-sized zinc oxide

Moafi, Hadi Fallah; Shojaie, Abdollah Fallah; Zanjanchi, Mohammad Ali

doi:10.1016/j.tsf.2011.01.347

Cited by 67 publications

(34 citation statements)

References 49 publications

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“…Several works indicated that the thermal stability of carbohydrate (i.e., starch, cellulose) did not change after incorporation of ZnO [66,67].…”

Section: (B)mentioning

confidence: 99%

“…The photocatalytic activity of pure ZnO (rod-like), TOCgel/ZnO (FL) and native cellulose/ZnO (aggregated nanoparticles) in the degradation of MB was performed in air at room temperature and under the exposure of the ultraviolet lamp for 2 h. The MB was chosen in this work due to their strong adsorption characteristics on many surfaces, good resistance to light degradation and a well, defined optical absorption band in the visible region [67].…”

Section: Photocatalytic Degradationmentioning

confidence: 99%

See 1 more Smart Citation

Contribution of TEMPO-Oxidized Cellulose Gel in the Formation of Flower-Like Zinc Oxide Superstructures: Characterization of the TOCgel/ZnO Composite Films

Jradi¹,

Maury²,

Daneault³

2015

Applied Sciences

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Abstract:In the present paper, we report on a simple and new approach for the synthesis of hierarchical flower-like zinc oxide superstructures ZnO (FL) in the presence of the TEMPO-oxidized cellulose gel (TOCgel) through a room temperature sol-gel process in aqueous medium. Resulting composite films based on TOCgel and ZnO were investigated by several techniques including scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA) and mechanical tests. SEM images demonstrated the formation of well-shaped flower-like ZnO superstructures within the fibrous structure of the TOCgel with a uniform diameter (~5 μm). FTIR and XPS results clearly confirmed the formation of such ZnO structures. We suggested that the carboxylate groups of TOCgel fibers act as capping agents and promote the construction of such flower-like ZnO via a nucleation-growth process. A proposed mechanism based on the oriented attachment-driven growth was discussed in order to explain the formation of ZnO (FL). The photocatalytic activity of the TOCgel/ZnO composite in the degradation of methylene blue (MB) under UV irradiation was clearly confirmed. Finally, mechanical tests demonstrated that the former TOCgel/ZnO film maintained a good flexibility (bent up to ~120°) without losing its photocatalytic activity.

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“…Several works indicated that the thermal stability of carbohydrate (i.e., starch, cellulose) did not change after incorporation of ZnO [66,67].…”

Section: (B)mentioning

confidence: 99%

Section: Photocatalytic Degradationmentioning

confidence: 99%

Contribution of TEMPO-Oxidized Cellulose Gel in the Formation of Flower-Like Zinc Oxide Superstructures: Characterization of the TOCgel/ZnO Composite Films

Jradi¹,

Maury²,

Daneault³

2015

Applied Sciences

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“…Loaded cotton fabric with ZnO nanoparticles led to reduce the intensity of these bands which confirm replacement of the O-H groups of the cellulose by the ZnO nanoparticles 24 (Fig. Cotton fibers as same as a semi crystalline polymer structure presented some large and wide reflections due to its internal structure and can be assigned according to the literature 25,26 . The X-ray diffraction spectra of cotton fabrics are presented in Fig.…”

Section: Resultsmentioning

confidence: 65%

Surface activation of cotton fiber by seeding silver nanoparticles and in situ synthesizing ZnO nanoparticles

Barani

2014

New J. Chem.

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The paper describes the study of photocatalytic oxidation and antibacterial properties of cotton fabric treated with zinc oxide/silver (ZnO/Ag) nanocomposites. The ZnO nanoparticles were synthesized by an in situ approach on the surface of activated cotton fibers with seeded Ag nanoparticles. The effect of Ag nanoparticles seeding and synthesis temperature on the morphological, thermal, photocatalytic and antibacterial properties of ZnO/Ag nanocomposites treated cotton fibers were characterized using scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffractometer, thermo gravimetric analysis, Attenuated Total Reflection-Fourier Transform Infrared spectrometer. Synthesizing ZnO nanoparticles on the surface of un-activated cotton fibers lead to the formation of agglomerated nanoparticles while the Ag nanoparticles seeded cotton fibers prevented forming the same. The results indicated the presence of ZnO/Ag nanocomposites on the coated cotton fabrics, and all loaded samples presented an inhibition zone against S. aureus and E. coli bacteria.

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“…Most of pyrolysis products are produced in this stage. L-Glucose is one of the major products, together with all kinds of combustible gases [39,40]. And at 330°C, the weight loss rate reaches its maximum combined with the following DTG curve (Fig.…”

Section: Resultsmentioning

confidence: 99%

Study of synergistic effect of cellulose on the enhancement of photocatalytic activity of ZnO

Wang

et al. 2017

J Mater Sci

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Semiconductor photocatalysts play a major role in photocatalytic process. Zinc oxide (ZnO) is supposed to be a preferred photocatalyst due to its high photosensitivity, mechanical-thermal stability, tunable morphology and non-toxicity. To enhance the photocatalytic activity of ZnO, cellulose/ZnO composite films (CZ films) with snowflake-like ZnO micro/nanoparticles immobilized in cellulose matrix were prepared by a simple dissolution and regeneration of cellulose and subsequently one-step hydrothermal synthesis of ZnO. The immobilization of ZnO was conducive to overcoming the shortcomings of aggregation easily and reclamation difficulty of scattered nanopowders. The obtained CZ films exhibited excellent photocatalytic efficiency (85.3%) to degrade methylene blue with minor amount of ZnO photocatalyst (\6 mg). The experimental results show that a photocatalytic process involving absorptiondegradation-desorption was proposed. Notably, the synergistic effects between cellulose film and the supported ZnO via absorption and desorption processes were important to enhance the photocatalytic efficiency. This work provided an effective method to support ZnO photocatalyst and improve the photocatalytic efficiency via a functional substrate.Mengya Xu and He Wang have contributed equally.

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Photocatalytic self-cleaning properties of cellulosic fibers modified by nano-sized zinc oxide

Cited by 67 publications

References 49 publications

Contribution of TEMPO-Oxidized Cellulose Gel in the Formation of Flower-Like Zinc Oxide Superstructures: Characterization of the TOCgel/ZnO Composite Films

Contribution of TEMPO-Oxidized Cellulose Gel in the Formation of Flower-Like Zinc Oxide Superstructures: Characterization of the TOCgel/ZnO Composite Films

Surface activation of cotton fiber by seeding silver nanoparticles and in situ synthesizing ZnO nanoparticles

Study of synergistic effect of cellulose on the enhancement of photocatalytic activity of ZnO

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