Novel adsorption and photocatalytic oxidation for removal of gaseous toluene by V-doped TiO2/PU under visible light

The photocatalysis process over N-doped TiO2 under visible light is examined for Pb(II) removal. The doping TiO2 with N element was conducted by simple hydrothermal technique and using urea as the N source. The doped photocatalysts were characterized by DRUVS, XRD, FTIR and SEM-EDX instruments. Photocatalysis of Pb(II) through a batch experiment was performed for evaluation of the doped TiO2 activity under visible light, with applying various fractions of N-doped, photocatalyst mass, irradiation time, and solution pH. The research results attributed that N doping has been successfully performed, which shifted TiO2 absorption into visible region, allowing it to be active under visible irradiation. The photocatalytic removal of Pb(II) proceeded through photo-oxidation to form PbO2. Doping N into TiO2 noticeably enhanced the photo-catalytic oxidation of Pb(II) under visible light irradiation. The highest photocatalytic oxidation of 15 mg/L Pb(II) in 25 mL of the solution could be reached by employing TiO2 doped with 10%w of N content 15 mg, 30 min of time and at pH 8. The doped-photocatalyst that was three times repeatedly used demonstrated significant activity. The most effective process of Pb(II) photo-oxidation under beneficial condition, producing less toxic and handleable PbO2 and good repeatable photocatalyst, suggest a feasible method for Pb(II) remediation on an industrial scale.

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Electrochemically Assisted Photocatalytic Oxidation of Nitrite over Cr-Doped TiO2 under Visible Light

Chemical Engineering & Technology ◽

10.1002/ceat.200500236 ◽

2006 ◽

Vol 29 (1) ◽

pp. 146-154 ◽

Cited By ~ 31

Author(s):

J. Y. Shi ◽

W. H. Leng ◽

W. C. Zhu ◽

J. Q. Zhang ◽

C. N. Cao

Keyword(s):

Visible Light ◽

Photocatalytic Oxidation ◽

Doped Tio2

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Enhanced visible-light photocatalytic oxidation capability of carbon-doped TiO2 via coupling with fly ash

Chinese Journal of Catalysis ◽

10.1016/s1872-2067(18)63152-3 ◽

2018 ◽

Vol 39 (12) ◽

pp. 1890-1900 ◽

Cited By ~ 12

Author(s):

Ning An ◽

Yuwei Ma ◽

Juming Liu ◽

Huiyan Ma ◽

Jucai Yang ◽

...

Keyword(s):

Fly Ash ◽

Visible Light ◽

Photocatalytic Oxidation ◽

Doped Tio2 ◽

Carbon Doped ◽

Visible Light Photocatalytic

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Facile preparation of multi-doped TiO2/rGO cross-linked 3D aerogel (GaNF@TGA) nancomposite as an efficient visible-light activated catalyst for photocatalytic oxidation and detoxification of atrazine

Solar Energy ◽

10.1016/j.solener.2018.08.034 ◽

2018 ◽

Vol 173 ◽

pp. 848-860 ◽

Cited By ~ 12

Author(s):

Amir Hossein Cheshme Khavar ◽

Gholamreza Moussavi ◽

Ali Reza Mahjoub ◽

Mohammad Satari

Keyword(s):

Visible Light ◽

Photocatalytic Oxidation ◽

Doped Tio2 ◽

Facile Preparation

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Enhanced Photocatalytic Activity of N/Li2MoO4 Co-doped TiO2 Nanoparticles under Visible Light

Applied Science and Engineering Progress ◽

10.14416/j.asep.2021.10.007 ◽

2021 ◽

Author(s):

Jutarat Kwakkaew ◽

Matthana Khangkhamano ◽

Rungrote Kokoo ◽

Weerachai Sangchay

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Tio2 Nanoparticles ◽

Photocatalytic Oxidation ◽

Uv Light ◽

Visible Region ◽

Strong Light ◽

Doped Tio2 ◽

Vis Spectroscopy ◽

Wide Range

TiO2-based nanomaterials have been extensively synthesized and used in a wide range of photocatalytic applications. The photocatalytic oxidation process, however, is only activated by irradiation with ultraviolet (UV) light which limits its indoor applications. Herein, to improve such limitations, N/Li2MoO4-doped TiO2 nanoparticles were prepared via sol-gel method. Li2MoO4 concentration was varied. The catalysts were characterized by XRD, XPS, FE-SEM, and UV-Vis spectroscopy. As-synthesized N/Li2MoO4-doped TiO2 catalysts exhibited their crystal sizes of as fine as 20 nm in diameter whereas that of the pure TiO2 was about 35 nm. The absorption ranges of the N/ Li2MoO4-doped catalysts were relocated from UV region toward visible light region. The catalyst with 1 mol% Li2MoO4 offered the highest degradation rate of methylene blue (MB) solution upon visible light irradiation. Its fine crystal size, narrow band gap energy (2.82 eV), high defect concentration, and strong light absorption in visible region are responsible for the enhanced photocatalytic activity of the 1 mol% Li2MoO4.

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