Preparation and characterization of novel CuBi2O4/SnO2 p–n heterojunction with enhanced photocatalytic performance under UVA light irradiation

Abdelkader, Elaziouti; Nadjia, Laouedj; Bekka, Ahmed

doi:10.1016/j.jksus.2014.06.002

Cited by 42 publications

(15 citation statements)

References 75 publications

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“…Based on this, the heterojunctions of Cu 2 O/TiO 2 , [17] Cu 2 O/ SnO 2 , [18] CuO/SnO 2 , [19] NiO/SnO 2 , [20] CuBi 2 O 4 /SnO 2 , [21] CaFe 3 O 4 / Ag 3 VO 4 , [22] SnO/SnO 2 [23,24,25] were fabricated to enhance the photocatalytic degradation of enviromentally-polluted organic dyes under ultraviolet-visible illumination. In addition, due to difference of work functions of metal oxide semiconductors, we can produce n-n or p-p junctions which present highly-efficient separation of photogenerated carriers.…”

Section: Introductionmentioning

confidence: 99%

Effect of SnO Composition in SnO/SnO₂ Nanocomposites on the Photocatalytic Degradation of Malachite Green under Visible Light

et al. 2021

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Three types of SnO/SnO2 nanocomposites with different component ratios were synthesized using a simple hydrothermal process. Three samples, S1, S2, and S3, were produced by optimizing the occupied volume inside the Teflon flask, and are referred to as SnO2 rich, intermediate level, and SnO rich, respectively. In terms of degradation of malachite green under visible light, the photocatalytic activity of the S2 sample outperforms the other two samples and pure SnO by 30 %. It is attributed to the fact that the S2 sample has the most heterojunction between p‐type SnO and n‐type SnO2 of the three samples because the formation of p‐type SnO and n‐type SnO2 heterojunction in S2 prevents photogenerated electron‐hole recombination. By comparing S1 and S3 samples, we figured out that Sn2+ doped into the SnO2 lattice acts as an electron trap, slowing the recombination process and increasing photocatalytic activity.

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Section: Introductionmentioning

confidence: 99%

Effect of SnO Composition in SnO/SnO₂ Nanocomposites on the Photocatalytic Degradation of Malachite Green under Visible Light

et al. 2021

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“…One way to suppress the carrier recombination is to form heterojunctions by combining two semiconductors. Lots of efforts have been paid to combine CuBi 2 O 4 with TiO 2 [19], NaTaO 3 [20], SnO 2 [21], CeO 2 [22], g-C 3 N 4 [5], Fe 2 O 3 [7], Bi 2 WO 6 [23], Bi 2 MoO 6 [24], and incorporate BiFeO 3 with Bi 2 WO 6 [25], CuS [26], Ag 3 PO 4 [27], BiOCl [11], CuO [28], ZnO [12], BiVO 4 [29], C 3 N 4 [30]. Such semiconductor combining has been proved to be an effective method to improve the charge separation and photoactivity of CuBi 2 O 4 and BiFeO 3 .…”

Section: Introductionmentioning

confidence: 99%

One Step Synthesis of Tetragonal-CuBi2O4/Amorphous-BiFeO3 Heterojunction with Improved Charge Separation and Enhanced Photocatalytic Properties

et al. 2020

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Tetragonal CuBi2O4/amorphous BiFeO3 (T-CBO/A-BFO) composites are prepared via a one-step solvothermal method at mild conditions. The T-CBO/A-BFO composites show expanded visible light absorption, suppressed charge recombination, and consequently improved photocatalytic activity than T-CBO or A-BFO alone. The T-CBO/A-BFO with an optimal T-CBO to A-BFO ratio of 1:1 demonstrates the lowest photoluminescence signal and highest photocatalytic activity. It shows a removal rate of 78.3% for the photodegradation of methylene orange under visible light irradiation for 1 h. XPS test after the cycle test revealed the reduction of Bi3+ during the photocatalytic reaction. Moreover, the as prepared T-CBO/A-BFO show fundamentally higher photocatalytic activity than their calcinated counterparts. The one-step synthesis is completed within 30 min and does not require post annealing process, which may be easily applied for the fast and cost-effective preparation of photoactive metal oxide heterojunctions.

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“…Photocatalysis appears to be quite promising as a cost‐effective alternative in environmental pollution remediation and solar‐energy conversion. Semiconductor‐based photocatalyst materials include metal oxides, sulfides, nitrides, and their mixed solid solutions . Photocatalysts are described by filled valence bands and empty conduction ones.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the kinetics and optimization of photocatalytic degradation of methylene blue

Farouq

2018

J Chinese Chemical Soc

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Studying and optimizing the photocatalytic degradation of methylene blue dye in a tubular reactor using different types of titanium dioxide are the main concerns of the present research. Subsequent experiments using a heterogeneous process (UV/H 2 O 2 /TiO 2 ) were conducted to investigate the effects of the changing amounts of catalyst dosing, pH values, time, and the initial dye concentration on the process performance. Response-surface methodology (RSM) experiment based on a mixture-analysis experiment was applied. The results show that an initial dye concentration of 20 ppm at pH = 2 with the addition of H 2 O 2 (0.2 mL) to the pollutant stream represents the best conditions of the photocatalytic process with 97.6% of dye degradation when using 1.5 g TiO 2 /L of the pollutant solution. All the experimental data showed good agreement with the predicted results obtained from statistical analysis. K E Y W O R D S kinetics, methylene blue (MB), mixture analysis, photocatalytic, RSM

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Preparation and characterization of novel CuBi2O4/SnO2 p–n heterojunction with enhanced photocatalytic performance under UVA light irradiation

Cited by 42 publications

References 75 publications

Effect of SnO Composition in SnO/SnO₂ Nanocomposites on the Photocatalytic Degradation of Malachite Green under Visible Light

Effect of SnO Composition in SnO/SnO₂ Nanocomposites on the Photocatalytic Degradation of Malachite Green under Visible Light

One Step Synthesis of Tetragonal-CuBi2O4/Amorphous-BiFeO3 Heterojunction with Improved Charge Separation and Enhanced Photocatalytic Properties

Investigation of the kinetics and optimization of photocatalytic degradation of methylene blue

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Preparation and characterization of novel CuBi2O4/SnO2 p–n heterojunction with enhanced photocatalytic performance under UVA light irradiation

Cited by 42 publications

References 75 publications

Effect of SnO Composition in SnO/SnO2 Nanocomposites on the Photocatalytic Degradation of Malachite Green under Visible Light

Effect of SnO Composition in SnO/SnO2 Nanocomposites on the Photocatalytic Degradation of Malachite Green under Visible Light

One Step Synthesis of Tetragonal-CuBi2O4/Amorphous-BiFeO3 Heterojunction with Improved Charge Separation and Enhanced Photocatalytic Properties

Investigation of the kinetics and optimization of photocatalytic degradation of methylene blue

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Effect of SnO Composition in SnO/SnO₂ Nanocomposites on the Photocatalytic Degradation of Malachite Green under Visible Light

Effect of SnO Composition in SnO/SnO₂ Nanocomposites on the Photocatalytic Degradation of Malachite Green under Visible Light