Visible-light-induced photocatalytic oxidation of carboxylic acids and aldehydes over N-doped TiO2 loaded with Fe, Cu or Pt

2008 ◽  
Vol 83 (1-2) ◽  
pp. 56-62 ◽  
Author(s):  
Takeshi Morikawa ◽  
Takeshi Ohwaki ◽  
Ken-ichi Suzuki ◽  
Shinya Moribe ◽  
Shozo Tero-Kubota
Keyword(s):  
Visible Light ◽  
Carboxylic Acids ◽  
Photocatalytic Oxidation ◽  
Doped Tio2

scholarly journals Photocatalysis over N-Doped TiO2 Driven by Visible Light for Pb(II) Removal from Aqueous Media

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 945
Author(s):  
Endang Tri Wahyuni ◽  
Titi Rahmaniati ◽  
Aulia Rizky Hafidzah ◽  
Suherman Suherman ◽  
Adhitasari Suratman
Keyword(s):  
Visible Light ◽  
Photocatalytic Oxidation ◽  
Irradiation Time ◽  
Aqueous Media ◽  
Visible Region ◽  
Significant Activity ◽  
Solution Ph ◽  
Doped Tio2 ◽  
Photo Oxidation ◽  
N Doping

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.

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

2006 ◽  
Vol 29 (1) ◽  
pp. 146-154 ◽  
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

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

2018 ◽  
Vol 39 (12) ◽  
pp. 1890-1900 ◽  
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

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

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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