Carbon dots and Bi4O5Br2 adhered on TiO2 nanoparticles: Impressively boosted photocatalytic efficiency for removal of pollutants under visible light

Shafafi, Sara; Habibi‐Yangjeh, Aziz; Feizpoor, Solmaz; Ghosh, Srabanti; Maiyalagan, T.

doi:10.1016/j.seppur.2020.117179

Cited by 53 publications

(20 citation statements)

References 51 publications

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“…[1,2] Numerous contaminants such as organic dyes, pesticides, and heavy metal ions are being released into the groundwater. [3][4][5] As a vital part of water pollution, the removal of organic dyes is particularly significant. Conventional treatment methods including flocculation, adsorption, and biological technology do not work efficiently of these hazardous substances owing to their resistance.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] By comparison, photocatalytic degradation technology is considered to be one of the most efficient approaches in the field of pollutant removal. [3] Some semiconductor materials such as TiO 2 , SnO 2 , CuO, ZnO, WO 3 , ZrO 2 , and g-C 3 N 4 have been studied by researchers to degrade organic contaminants. [9][10][11][12][13][14][15][16][17][18][19][20] Among them, TiO 2 is a potential candidate due to its advantages of chemical stability, low cost, high reaction rate, no secondary pollution, nontoxicity, strong oxidation ability, and so forth.…”

Section: Introductionmentioning

confidence: 99%

“…[ 6–8 ] By comparison, photocatalytic degradation technology is considered to be one of the most efficient approaches in the field of pollutant removal. [ 3 ]…”

Section: Introductionmentioning

confidence: 99%

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Novel axial substituted subphthalocyanine sensitized titanium dioxide H₁₂SubPcB‐OPh₂OH/TiO₂ photocatalyst: Synthesis, density functional theory calculation, and photocatalytic properties

Yang

Zhang

et al. 2021

Applied Organom Chemis

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Utilizing subphthalocyanine (SubPc) and 4,4 0 -dihydroxybiphenyl (C 12 H 10 O 2 ) as the raw materials, an innovative axial substituted SubPc H 12 SubPcB-OPh 2 OH was synthesized by solvothermal method. The density functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations were employed to further study the properties and structures of H 12 SubPcB-OPh 2 OH. To expand photocatalytic activities for organic dyes degradation, H 12 SubPcB-OPh 2 OH was decorated onto surface of TiO 2 nanoparticles to fabricate high-efficiency H 12 SubPcB-OPh 2 OH/TiO 2 photosensitive catalysts. The degradation experiments indicated that the H 12 SubPcB-OPh 2 OH/TiO 2 catalyst with the mass ratio of 1:25 had the greatest performance in the elimination of methyl orange (MO), bromophenol blue (BB), methylene blue (MB), and acid fuchsin (AF). The 29.4%, 72.5%, 27.6%, and 64.8% of MO, BB, MB, and AF was removed by pure TiO 2 in 180-min, respectively. Under the same conditions, the photocatalytic rate of H 12 SubPcB-OPh 2 OH/TiO 2 can reach 96.3%, 99.5%, 97.5%, and 99.5%, separately. The efficiency of the as-synthesized composite was 3.3, 1.4, 3.5, and 1.5 times higher than that over bare TiO 2 for MO, BB, MB, and AF degradation under visiblelight irradiation, respectively. Besides, after five cycles of experiments, the degradation rate of H 12 SubPcB-OPh 2 OH/TiO 2 photocatalyst to BB can still reach 90.2%, which demonstrated that the obtained photocatalysts possessed remarkable stability and is much higher than 15.6% of pure TiO 2 . This study provides a new idea to the construction of photosensitive catalysts based on TiO 2 for water purification.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel axial substituted subphthalocyanine sensitized titanium dioxide H₁₂SubPcB‐OPh₂OH/TiO₂ photocatalyst: Synthesis, density functional theory calculation, and photocatalytic properties

Yang

Zhang

et al. 2021

Applied Organom Chemis

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“…[1][2][3][4][5] As a member of Bi x O y X z (X = Cl, Br and I), Bi 4 O 5 Br 2 photocatalyst with layered structure has a built-in electric field that can accelerate the migration of carrier. [6][7][8] Whatʼs more, Bi 4 O 5 Br 2 has a relatively narrow bandgap (2.36 eV), which could get a higher visible light absorption capacity. 9 Meanwhile, its photogenerated carriers are easy to recombine, reducing the photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

PVP‐assisted synthesis of P‐Bi₄O₅Br₂/AgI heterojunction with enhanced photocatalytic activity for degradation of rhodamine B

Luo

Xiao

Wang

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: The commonly used RhB dye is a carcinogen that is widely found in environmental matrices and poses a threat to aquatic biota and human health. However, conventional wastewater treatment processes do not effectively remove low concentrations of these pollutants. Herein, the P-Bi 4 O 5 Br 2 /AgI (PBA) heterojunction was synthesized via a polyvinylpyrrolidone (PVP)-assisted solvothermal and precipitation method in this work. RESULTS:The photocatalytic efficiency of the PBA heterojunction was evaluated by degrading rhodamine B (RhB) with the irradiation of simulated sunlight. P-Bi 4 O 5 Br 2 /AgI-50 (PBA-50, the mass fraction of AgI in the composite was 50%) composite could degrade 98% RhB under 90 min irradiation of 500 W Xenon lamp, and its pseudo first-order reaction rate constant was 0.04265 min −1 , which was 17.1, 2.16, and 2.94 times higher than that of Bi 4 O 5 Br 2 , P-Bi 4 O 5 Br 2 , and AgI, respectively. Besides, the effects of the dosage of photocatalyst and the anion on the photocatalytic degradation of RhB over PBA-50 were analyzed. CONCLUSION:The enhanced photocatalytic activity of PBA was attributed to its better visible light capture ability, larger specific surface area, and faster photogenerated carrier separation efficiency, all of which were confirmed by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), UV-Vis diffues reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and photoelectrochemical analysis. In addition, the free radical trapping experiments confirmed that •O 2 − and h + were the main active species for degradation of RhB. Additionally, the smaller bandgap and the more negative conduction band position of Bi 4 O 5 Br 2 were reached after the introduction of PVP. Accordingly, a possible type-II heterojunction photocatalytic mechanism of P-Bi 4 O 5 Br 2 /AgI was proposed.

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“…10,11 Belonging to the semimetal group, the small overlap between the bottom of the conduction band and the top of the valence band provides interesting physicochemical and catalytic properties to bismuth. [12][13][14][15] For instance, bismuth-based composites gained a signification interest as active materials for the photo-/electrocatalytic synthesis of valuable chemicals (production of hydrogen peroxide, 16 ammonia 17 , formate 18,19 , hydrogen 15,20,21 ), the control of the catalytic selectivity, [22][23][24][25] the sensing, 26 and energy conversion [27][28][29][30] applications.…”

Section: Introductionmentioning

confidence: 99%

Tartaric acid regulated the advanced synthesis of bismuth-based materials with tunable performance towards the electrocatalytic production of hydrogen peroxide

et al. 2020

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Carbon dots and Bi4O5Br2 adhered on TiO2 nanoparticles: Impressively boosted photocatalytic efficiency for removal of pollutants under visible light

Cited by 53 publications

References 51 publications

Novel axial substituted subphthalocyanine sensitized titanium dioxide H₁₂SubPcB‐OPh₂OH/TiO₂ photocatalyst: Synthesis, density functional theory calculation, and photocatalytic properties

Novel axial substituted subphthalocyanine sensitized titanium dioxide H₁₂SubPcB‐OPh₂OH/TiO₂ photocatalyst: Synthesis, density functional theory calculation, and photocatalytic properties

PVP‐assisted synthesis of P‐Bi₄O₅Br₂/AgI heterojunction with enhanced photocatalytic activity for degradation of rhodamine B

Tartaric acid regulated the advanced synthesis of bismuth-based materials with tunable performance towards the electrocatalytic production of hydrogen peroxide

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Carbon dots and Bi4O5Br2 adhered on TiO2 nanoparticles: Impressively boosted photocatalytic efficiency for removal of pollutants under visible light

Cited by 53 publications

References 51 publications

Novel axial substituted subphthalocyanine sensitized titanium dioxide H12SubPcB‐OPh2OH/TiO2 photocatalyst: Synthesis, density functional theory calculation, and photocatalytic properties

Novel axial substituted subphthalocyanine sensitized titanium dioxide H12SubPcB‐OPh2OH/TiO2 photocatalyst: Synthesis, density functional theory calculation, and photocatalytic properties

PVP‐assisted synthesis of P‐Bi4O5Br2/AgI heterojunction with enhanced photocatalytic activity for degradation of rhodamine B

Tartaric acid regulated the advanced synthesis of bismuth-based materials with tunable performance towards the electrocatalytic production of hydrogen peroxide

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Novel axial substituted subphthalocyanine sensitized titanium dioxide H₁₂SubPcB‐OPh₂OH/TiO₂ photocatalyst: Synthesis, density functional theory calculation, and photocatalytic properties

Novel axial substituted subphthalocyanine sensitized titanium dioxide H₁₂SubPcB‐OPh₂OH/TiO₂ photocatalyst: Synthesis, density functional theory calculation, and photocatalytic properties

PVP‐assisted synthesis of P‐Bi₄O₅Br₂/AgI heterojunction with enhanced photocatalytic activity for degradation of rhodamine B