The comparison of photocatalytic activity of synthesized TiO2 and ZrO2 nanosize onto wool fibers

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

doi:10.1016/j.apsusc.2010.02.022

Cited by 53 publications

(22 citation statements)

References 33 publications

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“…Anatase TiO 2 is considered one of the best photocatalysts with high activity and non-toxic properties 5 , furthermore, it exhibits high chemical reactivity and stability under UV illumination 2 , which leads to greater possibilities for practical application as antibacterial agents [2][3][4][5] , self-cleaning surfaces 7 , organic photo degradation 8,6 , and hydrogen generation by the splitting of water, termed solar-hydrogen 6,9,10 . In addition, depending of phase and preparation conditions, anatase TiO 2 has high durability, high refractive index (n = 2.3), high resistivity and dielectric constant 11 k, with values from 30 to 100, so it is suitable for applications in optical wave-guides 12 , antireflection coatings 13 , photochemical solar cells 14,15 and gas sensors 11,12 . Photons with energy equal or higher than the energy band gap (~3.2eV) are able to generate electron/hole pairs 7 and have energy high enough to initiate redox and oxidation reactions 16 .…”

Section: Introductionmentioning

confidence: 99%

“…Photons with energy equal or higher than the energy band gap (~3.2eV) are able to generate electron/hole pairs 7 and have energy high enough to initiate redox and oxidation reactions 16 . For example, excited electrons can reduce oxygen to superoxide radicals, whilst the holes oxidize water molecules into hydroxyl radicals 5,13 . These intermediate species induce the decomposition of various molecules such as those which are organic or microbes, which leads to the self-cleaning ability and anti-microbial applications of a TiO 2 surface 17 .…”

Section: Introductionmentioning

confidence: 99%

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Deposition of TiO2 Film on Duplex Stainless Steel Substrate Using the Cathodic Cage Plasma Technique

et al. 2016

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This research used the "cathodic cage (CC)" technique for TiO 2 film deposition on duplex stainless steel substrate. This technique uses a multiple hollow cathode effect. Duplex stainless steel substrates were treated at temperatures of 300 o C, 350 o C and 400 o C, giving a temperature value ratio (T s /T m ) of 0.27 to 0.31 (Ts being the substrate temperature and Tm the melting temperature of the deposited material). Treatment times of 1, 2 and 4 hours were administered and polycrystalline TiO 2 films were obtained. The films were analyzed by optical microscopy (OM), X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM). During analysis, the formation of uniform films and the possibility of controlling the TiO 2 phase were observed. It was also shown that with longer treatment times and higher temperatures the rutile phase predominates. For treatment times of 4 hours at all temperatures, the rutile structure was present. With treatment times of less than 4 hours, anatase was present. In addition, results showed that this simple, low cost technique can be an alternative method for depositions of TiO 2 films, with the advantage of high levels of control over porosity, thickness and phase composition (anatase and rutile).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deposition of TiO2 Film on Duplex Stainless Steel Substrate Using the Cathodic Cage Plasma Technique

et al. 2016

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“…[14][15][16][17][18] Moreover, there are many studies on the construction of ZnO nanoparticles onto cotton fibers. [19][20][21][22][23][24] Although some properties such as UV protec-tion, [19][20][21] antibacterial properties 22 and superhydrophobicity 23,24 have been explored, solid phase self-cleaning inspection has not been carried out.…”

Section: 13mentioning

confidence: 99%

“…Details have been described in our previous work. 14,18 The photocatalytic decomposition was determined from the following equation.…”

Section: Photocatalytic Testmentioning

confidence: 99%

Synthesis and Characterization of Nano-sized Zinc Oxide Coating on Cellulosic Fibers: Photoactivity and Flame-retardancy Study

Fallah

Zanjanchi

2011

Chin. J. Chem.

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We have investigated the effect of zinc oxide as a photocatalyst and durable flame-retardant on cellulosic fibers. Zinc oxide nanocrystals were successfully synthesized and deposited onto cellulosic fibers using sol-gel process at low temperature. The samples were characterized by means of several techniques such as scanning electron microscopy, transmission electron microscopy, diffuse reflectance spectroscopy, X-ray diffraction and thermogravimetric analysis. The photocatalytic activity was tested by measuring the photodegradation of methylene blue under UV-Vis illumination. Moreover, flame-retardancy was tested by vertical flame spread test. The optimum add-on value for donating flame-retardancy onto cellulosic fabric was obtained to be in the range of 15.24 to 23.20 g of the ZnO per 100 g of fabric. Thermogravimetric analysis of pure and flame-retarded samples were accomplished and discussed. The results obtained are in agreement with Wall effect theory and Coating theory. The originality of this work on introducing photoactive flame-retarded fibers is highly valuable for industrial implementation.

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“…Water absorption in wool is significantly affected by the presence of nano TiO 2 on it and photocatalytic decomposition of methylene blue is pronounced due to the TiO 2 embedded in the wool. Other systems include TiO 2 /SiO 2 composite film over cotton fabrics, silicon modified TiO 2 coated wool fibers, aluminum oxide on non-woven and woven fabrics and low temperature processed ZnO nanorod arrays [50][51][52][53][54][55][56][57][58]. Apart from TiO 2 , there is work reported on the use of other oxides such as Al 2 O 3 , ZnO and some nanocomposites [59][60][61][62][63][64].…”

Section: Self-cleaning Action Of Metal Oxide Coated or Embedded Textilesmentioning

confidence: 99%

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

Krishna

Madhurima

Purkayastha

2013

Eur. Phys. J. Appl. Phys.

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Abstract. Surfaces that exhibit reversible wettability toward water are extremely important for a variety of technological applications. In this context, the development of superhydrophobic and superhydrophilic surfaces for self-cleaning applications has been receiving a great deal of attention in the last few years. In this review, an overview of the current state-of-science and technology of self-cleaning surfaces is presented. The current understanding of physics of wetting leading to surfaces with predictive, controllable and reversible wettability is first presented. The review then focuses on materials, mainly metal oxides and their composites, employed for self-cleaning applications. It is shown that, although conventionally oxides and polymers are considered for self-cleaning applications, recent developments point toward the use of artificially engineered surfaces with hierarchical roughness. Applications of self-cleaning films in nonconventional areas such as protection of fabrics, solar cells and structures related to cultural heritage are discussed. The review ends with an outlook for the future in terms of science and technology of self-cleaning surfaces.

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The comparison of photocatalytic activity of synthesized TiO2 and ZrO2 nanosize onto wool fibers

Cited by 53 publications

References 33 publications

Deposition of TiO2 Film on Duplex Stainless Steel Substrate Using the Cathodic Cage Plasma Technique

Deposition of TiO2 Film on Duplex Stainless Steel Substrate Using the Cathodic Cage Plasma Technique

Synthesis and Characterization of Nano-sized Zinc Oxide Coating on Cellulosic Fibers: Photoactivity and Flame-retardancy Study

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

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