Fabrication of p-n CuBi2O4/MoS2 heterojunction with nanosheets-on-microrods structure for enhanced photocatalytic activity towards tetracycline degradation

Guo, Feng; Li, Mingyang; Ren, Hongji; Huang, Xiliu; Hou, Wenxiu; Wang, Chao; Shi, Weilong; Lu, Changyu

doi:10.1016/j.apsusc.2019.06.158

Cited by 210 publications

(35 citation statements)

References 45 publications

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“…Markedly, pure KNO has no degradation effect under visible light irradiation, since it can only be excited by UV light. At the same time, the pure CN exhibited the poor visible‐light photocatalytic performance with only 17% of TC can be degraded within 120 min due to rapid recombination of photogenerated electrons . It is worth noting that after introducing N defects into the molecular skeleton, CNx reduces the band gap and increases the visible‐light absorption, which significantly improves its photocatalytic performance and its degradation efficiency was raised to 40%.…”

Section: Resultsmentioning

confidence: 99%

“…At the same time, the pure CN exhibited the poor visiblelight photocatalytic performance with only 17% of TC can be degraded within 120 min due to rapid recombination of photogenerated electrons. 47 It is worth noting that after introducing N defects into the molecular skeleton, CNx reduces the band gap and increases the visible-light absorption, which significantly improves its photocatalytic performance and its degradation efficiency was raised to 40%. Furthermore, the KNO/CNx composites were formed by combining KNO with CNx, exhibiting enhanced photocatalytic activity in comparison with pure KNO and CNx.…”

Section: Resultsmentioning

confidence: 99%

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Enhancement of visible‐light photocatalytic degradation performance over nitrogen‐deficient g‐C₃N₄/KNbO₃ heterojunction photocatalyst

Shi

Shu

Huang

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND The formation of heterojunction is an effective mean for increasing the photocatalytic activity of single‐phase semiconductor photocatalyst. RESULTS In this report, KNbO3/N‐defected g‐C3N4 (KNO/CNx) composites were prepared by an impregnation heat method. The optimized photocatalyst 3% KNO/CNx possesses excellent photocatalytic activity (100 mL, 10 mg/L; 84% degradation within 120 min) in the degradation of tetracycline (TC) under visible light (λ > 420 nm), and it can reach about 125, 10.71 and 3.75 times the degradation kinetic constants, compared with KNO, CN, and CNx, respectively. Furthermore, 3% KNO/CNx possesses relatively high stability during the entire photoreaction process. CONCLUSION This enhanced photocatalytic activity of KNO/CNx is mainly ascribed to the synergistic effect between the heterojunction and defect engineering, which expand the visible‐light adsorption and accelerate the separation efficiency of photo‐induced electron–hole pairs. The research is expected to be used to improve the structure and properties of KNO‐based composites, which provides a possibility for practical application of environmental restoration. © 2020 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Enhancement of visible‐light photocatalytic degradation performance over nitrogen‐deficient g‐C₃N₄/KNbO₃ heterojunction photocatalyst

Shi

Shu

Huang

et al. 2020

J of Chemical Tech & Biotech

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“…During this process, the built‐in electric field is established, which can suppress the recombination of the electrons at ZnWO 4 side and holes at BiOI side. If they want to recombine, they need to overcome electric field force . As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Constructing 1D/2D BiOI/ZnWO₄p‐n heterojunction photocatalyst with enhanced photocatalytic removal of NO

Gong

Zhu

Bello

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: Photocatalysis technology based on green renewable solar energy has broad prospects in environmental protection and new energy utilization. The energy of the light can be utilized to convert the pollutants in the environment into non-toxic substances even available products. Due to its low cost and environmental protection, photocatalysis technology has been further developed in the fields of water splitting, sewage treatment and nitrogen oxides (NO x ) removal.RESULTS: In this study, zinc tungstate (ZnWO 4 ) nanorods loaded on bismuth oxyiodide (BiOI) nanosheets with exposed {001} facet forming a 1D/2D BiOI/ZnWO 4 p-n heterojunction photocatalysts were synthesized and their photocatalytic activities for nitric oxide (NO) removal were investigated. The 20% BOI/ZWO composite exhibited the most excellent photocatalytic NO removal performance, which were 32.32% and 48.24% under visible light and simulated sunlight irradiation, respectively. CONCLUSION: A novel 1D/2D BiOI/ZnWO 4 p-n heterojunction was successfully synthesized by a two-step procedure. Compared to the pure ZnWO 4 and BiOI, the 20% BOI/ZWO composite has a significant increase in photocatalytic activity which is attributed to the enhanced visible light absorption and the improved separation of charge carriers. Trapping experiments and electron spin resonance results indicate that the hole (h + ), super oxygen radical (·O 2 − ) and hydroxyl radical (·OH) play minor roles, while the electron (e − ) has a major contribution to the NO removal process. Therefore, the BiOI/ZnWO 4 p-n heterojunction is a promising material for NO removal.

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“…Therefore, 120 °C was selected as a suitable hydrothermal temperature in this study. Eventually, we successively prepared the CuBi 2 O 4 nanocolumn arrays via a facile hydrothermal method with much shorter reaction time at lower temperature compared to the traditional hydrothermal synthesis routes [4,7,14,25,30,32,33]. The time-dependent UV-vis absorption spectra of methylene blue (MB) under light irradiation for CBO-0.5 h at the hydrothermal temperature of 120 °C were presented in Figure 5d.…”

Section: Resultsmentioning

confidence: 99%

Short-Time Hydrothermal Synthesis of CuBi2O4 Nanocolumn Arrays for Efficient Visible-Light Photocatalysis

et al. 2019

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In this article, a short-time hydrothermal method is developed to prepare CuBi2O4 nanocolumn arrays. By using Bi(NO3)3·5H2O in acetic acid and Cu(NO3)2·3H2O in ethanol as precursor solutions, tetragonal CuBi2O4 with good visible light absorption can be fabricated within 0.5 h at 120 °C. Tetragonal structured CuBi2O4 can be formed after 15 min hydrothermal treatment, however it possesses poor visible light absorption and low photocatalytic activity. Extending the hydrothermal treatment duration to 0.5 h results in a significant improvement invisible light absorption of the tetragonal CuBi2O4. The CuBi2O4 obtained through 0.5 h hydrothermal synthesis shows a band gap of 1.75 eV and exhibits the highest photocatalytic performance among the CuBi2O4 prepared with various hydrothermal time. The removal rate of methylene blue by the 0.5 h CuBi2O4 reaches 91% under visible light irradiation for 0.5 h. This study proposes a novel strategy to prepare photoactive CuBi2O4 nanocolumn arrays within 0.5 h at a moderate temperature of 120 °C. The hydrothermal method provides a facile strategy for the fast synthesis of metal-oxide-based photocatalysts at mild reaction conditions.

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Fabrication of p-n CuBi2O4/MoS2 heterojunction with nanosheets-on-microrods structure for enhanced photocatalytic activity towards tetracycline degradation

Cited by 210 publications

References 45 publications

Enhancement of visible‐light photocatalytic degradation performance over nitrogen‐deficient g‐C₃N₄/KNbO₃ heterojunction photocatalyst

Enhancement of visible‐light photocatalytic degradation performance over nitrogen‐deficient g‐C₃N₄/KNbO₃ heterojunction photocatalyst

Constructing 1D/2D BiOI/ZnWO₄p‐n heterojunction photocatalyst with enhanced photocatalytic removal of NO

Short-Time Hydrothermal Synthesis of CuBi2O4 Nanocolumn Arrays for Efficient Visible-Light Photocatalysis

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Fabrication of p-n CuBi2O4/MoS2 heterojunction with nanosheets-on-microrods structure for enhanced photocatalytic activity towards tetracycline degradation

Cited by 210 publications

References 45 publications

Enhancement of visible‐light photocatalytic degradation performance over nitrogen‐deficient g‐C3N4/KNbO3 heterojunction photocatalyst

Enhancement of visible‐light photocatalytic degradation performance over nitrogen‐deficient g‐C3N4/KNbO3 heterojunction photocatalyst

Constructing 1D/2D BiOI/ZnWO4p‐n heterojunction photocatalyst with enhanced photocatalytic removal of NO

Short-Time Hydrothermal Synthesis of CuBi2O4 Nanocolumn Arrays for Efficient Visible-Light Photocatalysis

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Enhancement of visible‐light photocatalytic degradation performance over nitrogen‐deficient g‐C₃N₄/KNbO₃ heterojunction photocatalyst

Enhancement of visible‐light photocatalytic degradation performance over nitrogen‐deficient g‐C₃N₄/KNbO₃ heterojunction photocatalyst

Constructing 1D/2D BiOI/ZnWO₄p‐n heterojunction photocatalyst with enhanced photocatalytic removal of NO