Characterization, adsorption and photocatalytic activity of vanadium-doped TiO2 and sulfated TiO2 (rutile) catalysts: Degradation of methylene blue dye

Mohamed, Mohamed Mokhtar; Al-Esaimi, M. M.

doi:10.1016/j.molcata.2006.03.071

Cited by 106 publications

(36 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The OH stretching of the TiO 2 gives a peak at 3396 cm -1 . The peaks at 624 cm -1 and 471 cm -1 are attributed to Ti-O stretching mode [31], [32]; the main absorption bands at 578 cm -1 and 453 cm -1 belong to the metal-oxygen stretching vibrations of NiFe 2 O 4 nano structures [33]. The C-O stretching vibration of the carboxylic group gives a peak at 1676 cm -1.…”

Section: Resultsmentioning

confidence: 99%

Efficient Catalytic Activity of Ionic Liquid-Supported NiFe2O4 Magnetic Nanoparticle Doped Titanium Dioxide Nano-Composite

Arumugam¹,

Redhi²,

Gengan³

2016

IJCEA

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Efficient Catalytic Activity of Ionic Liquid-Supported NiFe2O4 Magnetic Nanoparticle Doped Titanium Dioxide Nano-Composite

Arumugam¹,

Redhi²,

Gengan³

2016

IJCEA

View full text Add to dashboard Cite

“…In other words, the adsorption of anionic dye on oxide surface is favored, leading to an increase of the dye concentration on the surface and the facilitation of photocatalytic degradation of the dye being investigated [16,17]. The presence of transition metal cations such as cerium doped on the mesoporous materials, such as MCM-41 and MCM-48, may prevent the recombination between the photogenerated holes and electrons or elongate the time of charge separation because it acts as an electron acceptor center [18,19]. One can assumed that the hydroxyl groups on the surface of prepared catalysts act as an electron donor for photogenerated H + , forming active hydroxyl radicals (OH˙+) which attack the CR.…”

Section: Photocatalytic Degradation Of Congo Redmentioning

confidence: 99%

Synthesis, characterization, and photocatalytic activity of MCM-41 and MCM-48 impregnated with CeO2 nanoparticles

Pouretedal

Mina

2012

Int Nano Lett

View full text Add to dashboard Cite

MCM-41/CeO 2 and MCM-48/CeO 2 were synthesized by direct and indirect methods in solvent media and by grinding method in a solvent-free media. The materials prepared by grinding method are characterized by X-ray diffraction, infrared spectrum analysis, and N 2 adsorption and desorption. Surface areas and pore size of MCM-48 /CeO 2 were obtained with values of 680.9 m 2 Ág −1 and 1.64 nm, respectively, by BET method. The results showed that CeO 2 nanoparticles were introduced into MCM-41 and MCM-48, and there was formation of CeO 2 crystallites as secondary phase in the extra framework of MCM-41 and MCM-48. MCM-41/CeO 2 and MCM-48/CeO 2 materials are used as photocatalysts in degradation of Congo red as a dye pollutant. The MCM-41/CeO 2 and MCM-48/CeO 2 prepared by grinding method showed the higher photoreactivity with 97.6 % and 93.1 %, respectively, of degradation of Congo red. The higher photoreactivity is due to the complete incorporation of cerium ions in mesoporous material of MCMs in a solvent-free media.

show abstract

“…During the irradiation period, MB-photodegradation data were analysed using the Langmuir-Hinshelwood kinetic model [13,40]:…”

Section: Photocatalytic Activitymentioning

confidence: 99%

“…On the one hand, Mohamed et al [13] obtained a good activity in the photocatalytic degradation of methylene blue (MB) dye under visible light irradiation with rutile-TiO 2 after chemical treatment with NH 4 VO 3 and (NH 4 ) 2 SO 4 . They emphasized that MB degradation may be achieved due to basic sites detected on the modified surface.…”

Section: Introductionmentioning

confidence: 99%

Improvement in the methylene blue adsorption capacity and photocatalytic activity of H2-reduced rutile-TiO2 caused by Ni(II)porphyrin preadsorption

Páez

Lambert

Poelman

et al. 2011

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

H 2 -reduced rutile-TiO 2 xerogel (Ti-700), obtained via the sol-gel process, was found to strongly adsorb the Ni(II)-5,10,15,20-tetrakis(4-carboxyphenyl)-porphyrin (NiTCPP) from a methanolic solution, despite its very low specific surface area (S BET  2 m 2 g -1 ).UV/vis spectroscopy analysis showed that after calcination at 700 °C and reduction under H 2 flow at 400 °C, the TiO 2 -xerogel increased its NiTCPP-adsorption capacity by surface area unit by up to 120 times. The effect of the porphyrin presence in the catalytic performances of TiO 2 -xerogels was studied through three kinetics models: (i) the pseudo-first-order kinetic model; (ii) the pseudo-second-order kinetic model, which are used both to describe the adsorption rate based on the adsorption capacity of the catalysts; and (iii) the Langmuir-Hinshelwood kinetic model which is used to describe the photocatalytic degradation rate of methylene blue (MB). A significant improvement in the efficiency of Ti-700 was observed after the porphyrin-adsorption process (NiTCPP/Ti-700): MB-adsorption capacity at equilibrium and the apparent MBphotoconversion constant, k app , of NiTCPP/Ti-700 were both up to 2 times higher than those observed for the Ti-700.

show abstract

Characterization, adsorption and photocatalytic activity of vanadium-doped TiO2 and sulfated TiO2 (rutile) catalysts: Degradation of methylene blue dye

Cited by 106 publications

References 43 publications

Efficient Catalytic Activity of Ionic Liquid-Supported NiFe2O4 Magnetic Nanoparticle Doped Titanium Dioxide Nano-Composite

Efficient Catalytic Activity of Ionic Liquid-Supported NiFe2O4 Magnetic Nanoparticle Doped Titanium Dioxide Nano-Composite

Synthesis, characterization, and photocatalytic activity of MCM-41 and MCM-48 impregnated with CeO2 nanoparticles

Improvement in the methylene blue adsorption capacity and photocatalytic activity of H2-reduced rutile-TiO2 caused by Ni(II)porphyrin preadsorption

Contact Info

Product

Resources

About