Low-temperature preparation and microwave photocatalytic activity study of TiO2-mounted activated carbon

Liu, Yazi; Yang, Shaogui; Jiang, Hong; Sun, Cheng

doi:10.1016/j.jhazmat.2006.08.020

Cited by 93 publications

(54 citation statements)

References 30 publications

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“…Such treatment limits the ability to create films on textile substrates with low thermal resistance, such as cotton, viscose, wool, polypropylene, polyamide, polyester fibers, etc. (Liu et al 2007). The microwave treatment is one of the methods in which TiO 2 in anatase form can be enhanced at lower temperature (below 200°C).…”

Section: Introductionmentioning

confidence: 99%

“…The application of microwave treatment may be useful for the modification of low-thermal-resistance textile materials. Some approaches using microwave treatment to obtain crystalline TiO 2 have been reported (Liu et al 2007;Wilson et al 2002;Vigil et al 2001). Liuxue et al (2007) obtained TiO 2 anatase on cotton fibers prepared via a microwaveassisted liquid-phase process with hexafluorotitanate as precursor.…”

Section: Introductionmentioning

confidence: 99%

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Microwave-assisted TiO2: anatase formation on cotton and viscose fabric surfaces

et al. 2016

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The method of TiO 2 -anatase film preparation on cotton and viscose fabric surfaces using the sol-gel process and microwave treatment is presented. Microwave treatment was used to change the amorphous TiO 2 form to anatase directly on the fabrics. The influence of microwave treatment conditions on the obtainable polymorphic form of TiO 2 was examined. Fabrics were pretreated with low-temperature air plasma (30 min). The root mean square height in the selected area increased from 44 to 166 nm (cotton) and from 9 to 112 nm (viscose). Infrared analysis showed the new band at 1748 and 1732 cm -1 corresponding to C=O stretching for plasma-treated cotton and viscose textiles, respectively. The plasma pretreatment also improved the wetting properties by TiO 2 sol and increased the surface free energy of fabrics. TiO 2 film thickness was 180 nm (12 %wg. Ti) and 140 nm (3 %wg. Ti) for cotton and viscose, respectively. TiO 2 -modified cotton reduced the nicotine concentration three times more and TiO 2 -modified viscose was two times higher under sunlight compared to raw fabrics. No changes in strength were observed for TiO 2 -modified cotton, while the strength of TiO 2 -modified viscose decreased about 45 %. No effect of UV irradiation on cotton and a slight reduction of the strength of raw viscose (7 %) and TiO 2 -modified viscose (16 %) were observed. The Ti contents after washing decreased from 12 to 11 % (cotton) and from 3 to 2.6 % (viscose). The presented method allows obtaining TiO 2 film-anatase on the cotton and viscose fabrics, but its total effectiveness is better for cotton fabrics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microwave-assisted TiO2: anatase formation on cotton and viscose fabric surfaces

et al. 2016

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“…Furthermore, adding TiO 2 to AC could induce some beneficial effect because of the highly adsorptive characteristic of AC with respect to organic molecules and also resolve the problem of achieving optimum adsorption strength of the adsorbed molecules on the adsorbent to improve TiO 2 photocatalytic activity [20]. In fact, some authors have also reported a synergistic effect for AC-supported TiO 2 systems of some organic pollutants in the photocatalytic process [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Parameter effect on photocatalytic degradation of phenol using TiO2-P25/activated carbon (AC)

Lam

Sin

Mohamed

2010

Korean J. Chem. Eng.

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P25 powder embedded and TiO 2 immobilized on activated carbon (TiO 2 -P25/AC) was prepared by P25 powder modified sol-gel and dip-coated method. The photocatalysts were characterized by XRD, BET, SEM and their photocatalytic activities were evaluated through phenol degradation in a fluidized bed photoreactor. The addition of P25 in the photocatalysts could significantly enhance the photocatalytic activity, and the optimum loading of P25 was 3 g L −1 . The operating parameter results indicated that the optimum pH for phenol degradation was 5.2; the effect of air flow rate gave an optimal value of 2 L min −1 ; the increasing of UV light intensity led to an increase of degradation efficiency due to more photons absorbed on the surface of the photocatalyst. The kinetics of the phenol degradation fitted well with the Langmuir-Hinshelwood kinetics model. Finally, the photocatalytic ability of TiO 2 -P25/AC was reduced only 10% after five cycles for phenol degradation.

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“…To tackle this problem, loading TiO 2 nanoparticles on some supporting materials has been proposed 40 . Among the various supporting materials, activated carbon is an attractive candidate, due to its porous structure, significant adsorption capability, hydrophobic and hydrophilic properties, eco-friendly nature, structural stability, mechanical resistance, high surface area, and cost-effectiveness 41 . This was the first time that Mn, Mo, La/TiO 2 nanoparticles supported on activated carbon were used for degradation of Reactive Red 198 (RR 198) under visible light irradiation, and also the first time that the decolorization and degradation performance was evaluated for real textile wastewater; moreover, the intermediate compounds that had formed during the photocatalytic process were identified.…”

Section: Introductionmentioning

confidence: 99%

Visible Light Photocatalytic Degradation of Azo Dye and a Real Textile Wastewater Using Mn, Mo, La/TiO2 /AC Nanocomposite

Jorfi¹

2018

Chem.Biochem.Eng.Q.

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Mn, Mo, La/TiO 2 /activated carbon (AC) photocatalysts were synthesized by sol-gel method. The prepared samples were characterized by XRD, FT-IR, BET, DRS, and FE-SEM techniques. The findings revealed that the synthesized catalysts were anatase type and nano-sized particles. The catalysts exhibited high adsorption ability in the visible light region with a red shift in the adsorption edge. The formation of Mn, Mo, La/TiO 2 / AC crystallites in the activated carbon was confirmed by FE-SEM. The effects of initial dye concentration, catalyst dosage, reaction time, and solution pH were investigated for removal of Reactive Red 198. According to the obtained results, the maximum removal efficiency of 91 % was obtained at initial dye concentration of 20 mg L -1 , pH of 3, and catalyst concentration of 2 g L -1 . Synthesized nano-photocatalyst showed reasonable photo degradation efficiency of 84 % for initial COD concentration of 4700 mg L -1 in treatment of a real textile wastewater sample. GC/MS analysis of raw and treated wastewater confirmed degradation and producing of simple intermediates during the photocatalytic process.

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Low-temperature preparation and microwave photocatalytic activity study of TiO2-mounted activated carbon

Cited by 93 publications

References 30 publications

Microwave-assisted TiO2: anatase formation on cotton and viscose fabric surfaces

Microwave-assisted TiO2: anatase formation on cotton and viscose fabric surfaces

Parameter effect on photocatalytic degradation of phenol using TiO2-P25/activated carbon (AC)

Visible Light Photocatalytic Degradation of Azo Dye and a Real Textile Wastewater Using Mn, Mo, La/TiO2 /AC Nanocomposite

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