Environmentally effective photocatalyst CoO–TiO 2 synthesized by thermal precipitation of Co in amorphous TiO 2

Savio, A.K.P.D.; Fletcher, J.C.Q.; Smith, Kassiopeia; Iyer, Rupa; Bao, Jiming; Hernández, Francisco C. Robles

doi:10.1016/j.apcatb.2015.09.047

Cited by 64 publications

(26 citation statements)

References 41 publications

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“…Due to its strong oxidizing powder, cost-effective, and long-term stability against photo and chemical corrosion, TiO 2 has been used widely in water purification technology [1][2][3][4] However, the practical applications of TiO 2 are limited by its large band gap (3.2 eV), which can only active under the UV light irradiation [5][6][7] . Therefore, several strategies have been developed to shift the optical sensitivity of TiO 2 from UV to the visible-light region for the efficient use of solar energy, such as element doping, metal deposition, surface sensitization, and coupling of composite semiconductors [8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

Effect of calcination temperature on structural properties and photocatalytic activity of Mn-C-codoped TiO2

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Effect of calcination temperature on structural properties and photocatalytic activity of Mn-C-codoped TiO2

et al. 2016

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“…Element doping could reduce the band gap of the materials to extend its responding area to the visible region of the spectrum, and improved the light quantum efficiency to some extent [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ]. Another direction is the preparation of composite oxides and complex compounds, such as rGO/C-MoO 3 , Co x Zn 1− x Fe 2 O 4 -rGO, Fe 3 O 4 @C/Cu, Fe 3 O 4 @CuO, WO 3 /ZnO, Pt/Au/WO 3 , Ti/ZnO-Cr 2 O 3 , ZnO/CdS/TiO 2 , CoO-TiO 2 , CuO/SnO 2 /TiO 2 , BiPO 4 /TiO 2 /g-C 3 N 4 , AgInS 2 , ZnS-AgInS 2 , Ag 2 Mo 4 O 13 , K 6 Nb 10.8 O 30 , Y 2 Sn 2 O 7 , Ca 2 Nb- 2 O 7 , Bi 2 GaTaO 7 , ZnO-T, and ZnO nano- and microneedles [ 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ] which showed photocatalytic activity under visible light irradiation. These metal oxides as photocatalysts have relatively high photocatalytic activity because of their unique arrangement of electronic structure, charge transport characteristics and light absorption properties, which could generate photoexcited charge carriers and show remarkable stability under varying conditions [ 51 ].…”

Section: Introductionmentioning

confidence: 99%

Property Characterization and Photocatalytic Activity Evaluation of BiGdO3 Nanoparticles under Visible Light Irradiation

Luan

Shen

Zhang

et al. 2016

IJMS

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BiGdO3 nanoparticles were prepared by a solid-state reaction method and applied in photocatalytic degradation of dyes in this study. BiGdO3 was characterized by X-ray powder diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller, UV-Vis diffuse reflectance spectroscopy and transmission electron microscopy. The results showed that BiGdO3 crystallized well with the fluorite-type structure, a face-centered cubic crystal system and a space group Fm3m 225. The lattice parameter of BiGdO3 was 5.465 angstrom. The band gap of BiGdO3 was estimated to be 2.25 eV. BiGdO3 showed a strong optical absorption during the visible light region. Moreover, the photocatalytic activity of BiGdO3 was evaluated by photocatalytic degradation of direct dyes in aqueous solution under visible light irradiation. BiGdO3 demonstrated excellent photocatalytic activity in degrading Direct Orange 26 (DO-26) or Direct Red 23 (DR-23) under visible light irradiation. The photocatalytic degradation of DO-26 or DR-23 followed the first-order reaction kinetics, and the first-order rate constant was 0.0046 or 0.0023 min−1 with BiGdO3 as catalyst. The degradation intermediates of DO-26 were observed and the possible photocatalytic degradation pathway of DO-26 under visible light irradiation was provided. The effect of various operational parameters on the photocatalytic activity and the stability of BiGdO3 particles were also discussed in detail. BiGdO3/(visible light) photocatalysis system was confirmed to be suitable for textile industry wastewater treatment.

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“…Titanium dioxide (TiO 2 ) as a semiconductor material utilizes light to drive photocatalytic reactions for practical applications including organic contaminant degradation in air or water 1 2 3 . TiO 2 photocatalysts have attracted much attention over many years due to their strong optical absorptivity, chemical stability, low cost and high reactivity 4 5 6 7 8 .…”

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confidence: 99%

Advanced nanoporous TiO2 photocatalysts by hydrogen plasma for efficient solar-light photocatalytic application

Park

Kim

et al. 2016

Sci Rep

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We report an effect involving hydrogen (H2)-plasma-treated nanoporous TiO2(H-TiO2) photocatalysts that improve photocatalytic performance under solar-light illumination. H-TiO2 photocatalysts were prepared by application of hydrogen plasma of assynthesized TiO2(a-TiO2) without annealing process. Compared with the a-TiO2, the H-TiO2 exhibited high anatase/brookite bicrystallinity and a porous structure. Our study demonstrated that H2 plasma is a simple strategy to fabricate H-TiO2 covering a large surface area that offers many active sites for the extension of the adsorption spectra from ultraviolet (UV) to visible range. Notably, the H-TiO2 showed strong ·OH free-radical generation on the TiO2 surface under both UV- and visible-light irradiation with a large responsive surface area, which enhanced photocatalytic efficiency. Under solar-light irradiation, the optimized H-TiO2 120(H2-plasma treatment time: 120 min) photocatalysts showed unprecedentedly excellent removal capability for phenol (Ph), reactive black 5(RB 5), rhodamine B (Rho B) and methylene blue (MB) — approximately four-times higher than those of the other photocatalysts (a-TiO2 and P25) — resulting in complete purification of the water. Such well-purified water (>90%) can utilize culturing of cervical cancer cells (HeLa), breast cancer cells (MCF-7), and keratinocyte cells (HaCaT) while showing minimal cytotoxicity. Significantly, H-TiO2 photocatalysts can be mass-produced and easily processed at room temperature. We believe this novel method can find important environmental and biomedical applications.

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Environmentally effective photocatalyst CoO–TiO 2 synthesized by thermal precipitation of Co in amorphous TiO 2

Cited by 64 publications

References 41 publications

Effect of calcination temperature on structural properties and photocatalytic activity of Mn-C-codoped TiO2

Effect of calcination temperature on structural properties and photocatalytic activity of Mn-C-codoped TiO2

Property Characterization and Photocatalytic Activity Evaluation of BiGdO3 Nanoparticles under Visible Light Irradiation

Advanced nanoporous TiO2 photocatalysts by hydrogen plasma for efficient solar-light photocatalytic application

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