Low temperature preparation of anatase TiO2-coated activated carbon

Ao, Yanhui; Xu, Jun; Fu, Degang; Shen, Xiangqian; Chen, Yuan

doi:10.1016/j.colsurfa.2007.06.039

Cited by 111 publications

(65 citation statements)

References 24 publications

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“…The results revealed that the photocatalytic activity of TiO 2 -P25/ AC photocatalyst has repeatability. Similar results were obtained in TiO 2 immobilized AC system [54]. The reduction in the degradation efficiency among the cycles can be explained by the loss of photocatalyst because of the difficulty to avoid any loss of catalyst materials during the experiments.…”

Section: Repeatability Of Photocatalystsupporting

confidence: 84%

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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Section: Repeatability Of Photocatalystsupporting

confidence: 84%

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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“…Another distinct diffraction is found at nearly 13.1 • and assigned as (1 0 0) diffraction plane, revealing the interplanar structural packing [26]. All diffraction peaks of bare TiO 2 are attributed to anatase phase, instead of rutile phase, which is in good accordance with the reference [27]. Diffraction patterns of CNs-TiO 2 hybrids resemble that of bare anatase TiO 2 and no characteristic peaks of CNs are observable, attributing to the low content and relatively low diffraction intensity of CNs [20].…”

Section: Xrd Patternssupporting

confidence: 76%

Fabrication, characterization, and photocatalytic performance of exfoliated g-C3N4–TiO2 hybrids

Chang

Zhang

Xie

et al. 2014

Applied Surface Science

188

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a b s t r a c tA series of TiO 2 hybrids composited with exfoliated g-C 3 N 4 nanosheets (CNs) were successfully synthesized through a facile sol-gel method and fully characterized by X-ray diffraction patterns (XRD), Fourier transform-infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and UV-vis diffuse reflectance spectra (UV-vis DRS). The CNs-TiO 2 hybrids were exposed to visible light irradiation and showed much higher catalytic capability toward degrading dye rhodamine B (RhB) comparing with bare TiO 2 and N-TiO 2 . The sample CNs-TiO 2 -0.05 exhibited the largest apparent reaction rate constant among all CNs-TiO 2 hybrids, which was 2.4 times and 7.0 times as high as bare TiO 2 and N-TiO 2 , respectively. The enhanced catalytic efficiency could be mainly attributed to the well-matched band gap structure with heterojunction interface, suitable specific surface area, and favorable optical property. In addition, active species trapping experiments were conducted, revealing that photoinduced holes (h + ) had a severe influence on catalytic outcome, through which a possible catalytic mechanism was finally realized and proposed.

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“…A low temperature impregnation method using ultrasonication was developed for applying TiO 2 to the ACs [43,44]. Six grams of Aquasorb 2000 and a mass of P25 between 0.03 and 0.6 g were added to a 200 mL solution of deionised water and sonicated for 1 h in an ultrasonic bath.…”

Section: Preparation Of Ipcasmentioning

confidence: 99%

Photodegradation of Famotidine by Integrated Photocatalytic Adsorbent (IPCA) and Kinetic Study

et al. 2010

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Integrated photocatalytic adsorbents (IPCAs) comprised of nanocrystalline titanium dioxide (TiO 2 ) and activated carbon (AC) were prepared using an ultrasonic impregnation technique. The IPCAs were characterised by scanning electron microscopy (SEM) and Fourier-transform infrared (FT-IR) spectroscopy and were employed as catalysts for the photodegradation of famotidine-an active pharmaceutical ingredient-in aqueous solutions using illumination from a 125 W medium pressure mercury lamp. The degradation kinetics were found to follow a pseudofirst-order rate law and varying TiO 2 loadings induced different increases in the apparent first-order rate constant of the process. The kinetic behaviour can be described in terms of a modified Langmuir-Hinshelwood (LH) model. The IPCA prepared using a 10% TiO 2 to AC loading exhibited the highest rate constant with a K C and k r of 0.0172 L/mg and 0.237 mg/L/min, respectively. The LH model fits the experimental data and elucidates the effect of the TiO 2 content of the IPCA on the degradation rate. The use of calcination (heat treatment) in IPCA preparation and its effect on photocatalytic and adsorption performance were also investigated. The present work demonstrates that the combination of TiO 2 and AC results in a promising material for application in the degradation of organic pollutants.

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Low temperature preparation of anatase TiO2-coated activated carbon

Cited by 111 publications

References 24 publications

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

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

Fabrication, characterization, and photocatalytic performance of exfoliated g-C3N4–TiO2 hybrids

Photodegradation of Famotidine by Integrated Photocatalytic Adsorbent (IPCA) and Kinetic Study

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