A study on removal efficiency of phenol and humic acid using spherical activated carbon doped by TiO2

Jung, Hye-Ju; Hong, Ji-Sook; Suh, Jeong-Kwon

doi:10.1007/s11814-011-0067-8

Cited by 7 publications

(4 citation statements)

References 29 publications

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“…Further increase or decrease, the amount of catalysts will reduce the photodegradation. The results are in agreement with the data published by other researchers [37,38]. When the amount of the charged catalyst is too high, turbidity will hinder the light penetration and enhance the light scattering [39]; thus, the photocatalytic activity of the catalyst will be reduced due to the decreased light intensity.…”

Section: Resultssupporting

confidence: 91%

“…Generally, phenol is firstly oxidized to aromatic intermediates such as hydroquinone, catechol, benzoquinone, and 4, 4dihydroxybiphenyl, and then phenyl rings of theses aromatic intermediates break up to form aliphatic acid which is further oxidized to short-chain organic acid such as oxalic acid, acetic acid, and formic acid. Finally, they are decomposed to carbon dioxide and water completely [11,37]. The aromatic intermediates always have colors.…”

Section: Resultsmentioning

confidence: 99%

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Nanocrystalline N-DopedTiO2Powders: Mild Hydrothermal Synthesis and Photocatalytic Degradation of Phenol under Visible Light Irradiation

Wang

Liu

et al. 2013

International Journal of Photoenergy

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Nitrogen-doped TiO2powders have been prepared using technical guanidine hydrochloride, titanyl sulfate, and urea as precursors via a mild hydrothermal method under initial pressure of 3MPa,150∘Cholding for 2h without any postheat treatment for crystallization. The nanocrystalline N-doped TiO2powders were composed of anatase TiO2by XRD. The grain size was estimated as about 10 nm, and the BET specific surface area of the powder was measured as 154.7 m2/g. The UV-visible absorption spectra indicated that the absorption edge of the N-doped TiO2powders had been red shifted into the visible light region. The photocatalytic performance of the synthesized powders was evaluated by degradation of phenol under visible light irradiation. And the effects of the catalyst load and the initial pH value on the photodegradation were also investigated.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Nanocrystalline N-DopedTiO2Powders: Mild Hydrothermal Synthesis and Photocatalytic Degradation of Phenol under Visible Light Irradiation

Wang

Liu

et al. 2013

International Journal of Photoenergy

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“…The TiO 2 photocatalysts was prepared via a previously described ion exchange method and heat-treatment process [13,14]. Titanium trichloride, distilled water and ionexchange resin were mixed in a weight ratio of TiCl 3 :H 2 O:SK1BH = 1:30:12 and then stirred at 150 rpm for 1 hr at ambient temperature.…”

Section: B Preparation Of Tio2 Photocatalystmentioning

confidence: 99%

Evaluation of TiO2 derived mesoporous spherical photocalysts for the oxidation of industrial waste water treatment process

Ko¹,

Ko²,

Lee³

et al. 2016

Fourth International Conference on Advances in Applied Science and Environmental Technology- ASET 2016

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This paper mainly discussed the performance of photocatalysts which are prepared cation exchange resin and TiCl 3 precursor via heat treatment process to enhance their photocatalytic potentials. The morphology and size of TiO 2 photocatalyst was well ordered spherical shape and average diameter of 0.30 ~0.45 mm with well dispersed by TiO 2 on the surface of spherical activated carbon. TiO 2 supported on spherical activated carbon contains two different phases; anatase (83%) and rutile (17%). The TiO 2 photocatalyst had high specific surface area of 1,649 m 2 /g and high total pore volume of 1.61 cm 3 /g. Adsorption characteristics and photocatalytic activity of TiO 2 photocatalyst were evaluated by the removal of humic acid from waste water model aqueous solution. Catalyst dosage, initial humic acid concentration, and coexisting ions have influences on the photocatalytic degradation of humic acid. The degradation of humic acid by meso-TiO2/SAC was dependent on catalyst dosage, initial its concentration. TiO 2 photocatalyst has potentials for application as adsorbent and also as a photocatalyst in the removal of humic acid from groundwater and surface water.

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“…Owing to the excellent photocatalytic activity and superior oxidation ability, TiO 2 photocatalyst has been applied to the fields of water purification/sterilization 8 , wastewater treatment 9,10 and environmental detection 11 , since Fujishima and Honda discovered the photocatalytic splitting of water on TiO 2 electrodes 12 . A main attraction of such photocatalyst is due to the superior oxidative power of photogenerated holes, high activity radicals and other active oxygen species that can readily degrade a wide spectrum of organic compounds [13][14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical Properties and Its Application of Nano-TiO2/ Boron-doped Diamond Heterojunction Electrode Material

Han¹,

Ruan²,

Chen³

et al. 2013

Asian J. Chem.

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Like titanium dioxide (TiO2), boron-doped diamond (BDD) is one of the most popular functional materials in recent years. In this work, TiO2/BDD heterojunction electrodes were prepared by dip-coating TiO2 nanoparticles onto BDD electrodes. XRD patterns of these electrodes suggest that the mixed-phase TiO2/BDD heterojunction electrode with anatase and rutile can be obtained at 700 ºC, named as mixed-phase TiO2/BDD electrode. However, the TiO2/BDD heterojunction electrode prepared at 450 ºC has only anatase phase TiO2, named as pure-anatase TiO2/BDD electrode. SEM images indicate that TiO2 nanoparticles with ca. 20 nm were both immobilized continuously and uniformly onto the BDD electrode whether at 700 ºC or 450 ºC. The photoelectrocatalytic activity of mixed-phase TiO2/BDD electrode is 3-fold of that obtained at pure-anatase TiO2/BDD electrode, indicating that mixed-phase TiO2/BDD electrode is more effective to use to degrade and/or detect the organic compounds. Comparing with the TiO2/ITO electrode, the TiO2/BDD electrode presents an excellent chemical stability. The detection of glucose and KHP in the solution indicates that the steady-state net photocurrent in the range of concentration monitored presents superiorly linear relationship to the concentration of glucose and KHP. Therefore, the mixed-phase TiO2/BDD electrode may be used as a high effective sensing material for the detection of organic compounds.

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A study on removal efficiency of phenol and humic acid using spherical activated carbon doped by TiO2

Cited by 7 publications

References 29 publications

Nanocrystalline N-DopedTiO2Powders: Mild Hydrothermal Synthesis and Photocatalytic Degradation of Phenol under Visible Light Irradiation

Nanocrystalline N-DopedTiO2Powders: Mild Hydrothermal Synthesis and Photocatalytic Degradation of Phenol under Visible Light Irradiation

Evaluation of TiO2 derived mesoporous spherical photocalysts for the oxidation of industrial waste water treatment process

Photoelectrochemical Properties and Its Application of Nano-TiO2/ Boron-doped Diamond Heterojunction Electrode Material

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