Effect of single-cation doping and codoping with Mn and Fe on the photocatalytic performance of TiO 2 thin films

Lin, Minggui; Chen, Huisu; Chen, W.F.; Nakaruk, Auppatham; Koshy, Pramod; Sorrell, Charles C.

doi:10.1016/j.ijhydene.2014.02.013

Cited by 48 publications

(19 citation statements)

References 36 publications

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“…Another way to improve the properties of TiO 2 thin film was doping nonmetal or metal ions. Nonmetal (such as N(9),C(10) ) and metal (such as Fe(5),Nb (3,11,12),Sm(13),Hg (14),Mn (15) …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Nd-doped TiO₂thin films by sol-gel dip-coating method

et al. 2016

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TiO 2 thin films doped with neodymium(Nd) in the range from 0 at.% to 10at. % were prepared on glass substrates by sol-gel dip-coating method. Water contact angle on the Nd-doped TiO 2 films were measured by contact angle analyzer. The water contact angle measurement result showed that the hydrophily of the films improved when the Nd 3+ concentration increased to 5 at.%. The photocatalytic activity of the undoped and Nd-doped TiO 2 thin films were investigated by the degradation of methylene blue under high-voltage mercury lamp. The results showed that 5 at.% Nd-doped TiO 2 thin film exhibited the highest photocatalytic efficiency.

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“…Another way to improve the properties of TiO 2 thin film was doping nonmetal or metal ions. Nonmetal (such as N(9),C(10) ) and metal (such as Fe(5),Nb (3,11,12),Sm(13),Hg (14),Mn (15) …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Nd-doped TiO₂thin films by sol-gel dip-coating method

et al. 2016

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“…Actually, lattice distortion will be caused inevitably in Fe 2 O 3 by the substitution, which possibly destroys the stability of the crystalline phases and thus reduces the crystal contents of a-Fe 2 O 3 and c-Fe 2 O 3 phases. 19 Figure 1B-D. It indicates that the BaFe 12 O 19 phase is probably also formed by BaCO 3 and Fe 2 O 3 phases following Equations 1 and 2 in the Nb 5+ ions doped samples.…”

Section: Resultsmentioning

confidence: 82%

“…Figure 3 illustrates the XRD patterns of the BFNO sintered at 1100°C-1300°C for 3 hours. It is found that only BaFe 12 19 is still not achieved in the sample with x=0.6 sintered at 1300°C for 3 hours, the peak intensities of the impurity phases decrease significantly from 1100°C to 1300°C. Compared with the samples without holding time in Figure 1, the peak intensity ratio of BaFe 12 O 19 to the impurity phases increases distinctly and the formation temperature of single-phased BaFe 12 O 19 decreases in the samples sintered for 3 hours.…”

Section: Resultsmentioning

confidence: 96%

“…It implies that part of Nb 5+ ions probably enter into crystal lattice of Fe 2 O 3 and substitute for Fe 3+ ions gradually with temperature increasing, forming the Nb 5+ ‐doped Fe 2 O 3 . Actually, lattice distortion will be caused inevitably in Fe 2 O 3 by the substitution, which possibly destroys the stability of the crystalline phases and thus reduces the crystal contents of α‐Fe 2 O 3 and γ‐Fe 2 O 3 phases . Moreover, the decreased iron source and more complex chemical composition with x increasing according to chemical formula of BaFe 12− x Nb x O 19 might aggravate the decline in crystal contents of α‐Fe 2 O 3 and γ‐Fe 2 O 3 phases.…”

Section: Resultsmentioning

confidence: 99%

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Formation of BaFe_12−xNb_xO₁₉ and its high electromagnetic wave absorption properties in millimeter wave frequency range

et al. 2017

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BaFe12−xNbxO19 (BFNO, x=0‐0.6) powders with Nb5+ substituting for Fe3+ were prepared by sol‐gel method. The formation process and electromagnetic (EM) wave absorption properties of the BFNO are investigated in detail. With Nb5+ content increasing from x=0 to x=0.6, the formation temperature of barium ferrite phase without heat time increases from ~700°C to ~900°C, while the appearance temperature of typical plate grains decreases from ~1300°C to ~1100°C, and the crystallization ability decreases at 600°C‐900°C, while the grain size increases gradually at 1100°C‐1300°C. Increasing sintering temperature and time promote the formation of barium ferrite phase and grain growth in all the samples. The ε′ and ε″ of the sample with x=0.6 sintered at 1300°C for 3 hours reach highest of ~7.9 and ~0.95 over 26.5‐40 GHz. Multiresonance peaks in permeability decrease from 40+ GHz to ~30 GHz with x rising from 0 to 0.6. Ultimately, small RLmin of ~−42 dB, thin dm of ~0.76 mm, and broad bandwidth of >12 GHz can be exhibited simultaneously around millimeter wave atmospheric window of 35 GHz.

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“…Usually, titanium dioxide can exist as three crystalline polymorphs, namely, anatase (tetragonal), brookite (orthorhombic), and rutile (tetragonal) 17,18,19 . However, they have shown various photocatalytic activities, due to variations in their physical and crystallographic properties 20,21 . Anatase is the most photoactive phase of TiO 2 , due to its particular crystallographic structure, which increases electron-hole recombination times 22,23 .…”

Section: Introductionmentioning

confidence: 99%

Visible Light Photocatalytic Degradation of Azo Dye and a Real Textile Wastewater Using Mn, Mo, La/TiO2 /AC Nanocomposite

Jorfi¹

2018

Chem.Biochem.Eng.Q.

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Mn, Mo, La/TiO 2 /activated carbon (AC) photocatalysts were synthesized by sol-gel method. The prepared samples were characterized by XRD, FT-IR, BET, DRS, and FE-SEM techniques. The findings revealed that the synthesized catalysts were anatase type and nano-sized particles. The catalysts exhibited high adsorption ability in the visible light region with a red shift in the adsorption edge. The formation of Mn, Mo, La/TiO 2 / AC crystallites in the activated carbon was confirmed by FE-SEM. The effects of initial dye concentration, catalyst dosage, reaction time, and solution pH were investigated for removal of Reactive Red 198. According to the obtained results, the maximum removal efficiency of 91 % was obtained at initial dye concentration of 20 mg L -1 , pH of 3, and catalyst concentration of 2 g L -1 . Synthesized nano-photocatalyst showed reasonable photo degradation efficiency of 84 % for initial COD concentration of 4700 mg L -1 in treatment of a real textile wastewater sample. GC/MS analysis of raw and treated wastewater confirmed degradation and producing of simple intermediates during the photocatalytic process.

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Effect of single-cation doping and codoping with Mn and Fe on the photocatalytic performance of TiO 2 thin films

Cited by 48 publications

References 36 publications

Synthesis and Properties of Nd-doped TiO₂thin films by sol-gel dip-coating method

Synthesis and Properties of Nd-doped TiO₂thin films by sol-gel dip-coating method

Formation of BaFe_12−xNb_xO₁₉ and its high electromagnetic wave absorption properties in millimeter wave frequency range

Visible Light Photocatalytic Degradation of Azo Dye and a Real Textile Wastewater Using Mn, Mo, La/TiO2 /AC Nanocomposite

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Effect of single-cation doping and codoping with Mn and Fe on the photocatalytic performance of TiO 2 thin films

Cited by 48 publications

References 36 publications

Synthesis and Properties of Nd-doped TiO2thin films by sol-gel dip-coating method

Synthesis and Properties of Nd-doped TiO2thin films by sol-gel dip-coating method

Formation of BaFe12−xNbxO19 and its high electromagnetic wave absorption properties in millimeter wave frequency range

Visible Light Photocatalytic Degradation of Azo Dye and a Real Textile Wastewater Using Mn, Mo, La/TiO2 /AC Nanocomposite

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Product

Resources

About

Synthesis and Properties of Nd-doped TiO₂thin films by sol-gel dip-coating method

Synthesis and Properties of Nd-doped TiO₂thin films by sol-gel dip-coating method

Formation of BaFe_12−xNb_xO₁₉ and its high electromagnetic wave absorption properties in millimeter wave frequency range