Construction of novel S-scheme LaFeO3/g-C3N4 composite with efficient photocatalytic capacity for dye degradation and Cr(VI) reduction

Hu, Chunyan; Yu, Benxian; Zhu, Zhaojie; Zheng, Jian; Wang, Wei; Liu, Baojiang

doi:10.1016/j.colsurfa.2023.131189

Cited by 27 publications

(4 citation statements)

References 42 publications

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“…To date, it is still a great challenge to develop suitable strategies to optimize the separation rate of carriers and maximize the photocatalytic activity of BiOBr. − It has been demonstrated that the size and shape of photocatalysts have an impact on photocatalytic performance. − For example, a 2D nanosheet structure with a large specific surface area provides more reaction sites and thus promotes photocatalytic reactions. − Among the various shapes of BiOBr, − the flower-shaped microsphere structure of BiOBr enriched with nanosheets maximizes its specific surface area while promoting the adsorption of pollutants . In addition, doping rare earth ions into BiOBr is an effective way to enhance the separation efficiency of electron–hole pairs. − However, the rapid recombination of photogenerated carriers and the high surface energy of microspheres result in severe aggregation, thus imposing limitations on photocatalytic activity. − Assembling microspheres on fibers provides a feasible way to prevent agglomeration and facilitates recycling. − …”

Section: Introductionmentioning

confidence: 99%

Swallowed Embedding of Nanopetal-Rich Microflowers in Flexible Photocatalytic and Thermoresponsive Functional Composite Fibers

Tao,

Luo,

Shen

et al. 2024

Langmuir

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Developing efficient catalysts to degrade pollutants in water is a very important way to alleviate water pollution. However, it is crucial but challenging to broaden the functions of conventional photocatalysts and improve their environmental adaptability. In this paper, Bi(Er 3+ /Yb 3+ )OBr/polyacrylonitrile (BOB-EY/PAN) composite fibers with a swallowed-embedded structure assembled with nanopetal-rich microflowers were designed and fabricated, integrating photocatalytic and temperature-monitoring functions simultaneously. Their unique structure brings a large specific surface area, and the doping of rare earth ions improves the separation efficiency of electron−hole pairs, which enhances the photocatalytic efficiency and endows the fibers with a temperature-monitoring function at the same time. Under simulated sunlight irradiation, the nanofibers show a maximum degradation efficiency of 99.2% for tetracycline hydrochloride (TC) with a degradation constant of K as high as 0.078 min −1 . Based on the fluorescence intensity ratio (FIR), the two thermally coupled levels of Er 3+ in the nanofibers, 2 H 11/2 and 4 S 3/2 , provide real-time temperature feedback, displaying a maximum relative sensitivity as high as 0.0215 K −1 at 303 K. Dual-functional BOB-EY/PAN composite nanofibers show great potential for industrial wastewater disposition, providing solutions for wastewater purification in special scenarios.

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Section: Introductionmentioning

confidence: 99%

Swallowed Embedding of Nanopetal-Rich Microflowers in Flexible Photocatalytic and Thermoresponsive Functional Composite Fibers

Tao,

Luo,

Shen

et al. 2024

Langmuir

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“…Hu et al successfully constructed LaFeO 3 /g‐C 3 N 4 composite by simple hydrothermal method, wherein the composite showed excellent photodegradation efficiency compared to pure LaFeO 3 and g‐C 3 N 4 , respectively. [ 18 ] The incorporation of Bi 2 WO 6 with g‐C 3 N 4 in PC typically enhances the overall performance of the composite material. Since g‐C 3 N 4 has excellent stability and electronic properties, and Bi 2 WO 6 has a narrow bandgap, combining them can exhibit synergistic effects in photocatalytic reactions.…”

Section: Introductionmentioning

confidence: 99%

Bi₂WO₆ Incorporation of g‐C₃N₄ to Enhance the Photocatalytic N₂ Reduction Reaction and Antibiotic Pollutants Removal

Dhanaraman,

Verma,

Chen

et al. 2024

Solar RRL

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Synthesis of ammonia from photocatalytic N2 reduction is challenging due to the fast recombination of electron‐hole pairs and the low selectivity of N2 on catalysts. This can be addressed by creating heterojunctions to separate the photogenerated carriers adequately. In this regard, we synthesized BW/g‐C3N4 and varied the weight percentage of g‐C3N4. The best photocatalytic activity for N2 reduction reaction (N2RR) was achieved with a ratio of BW/gC3N4 in 3.5:2 ratio, deemed to be the optimized heterojunction. N2‐temperature programmed desorption analysis showed outstanding chemisorption of N2 adsorbed on the BW/g‐C3N4 surface compared to pristine g‐C3N4 and BW. Additionally, forming a heterojunction enhanced the charge transfer process and well‐separated electron‐hole pairs, significantly boosting the water oxidation process on the catalytic surface. Photoelectrochemical analysis revealed that BW/g‐C3N4 exhibits the shortest hole relaxation lifetime and higher current density than its pristine counterparts. The robust contact between g‐C3N4 and BW reduced the work function of BW/g‐C3N4 based on ultraviolet photoelectron spectroscopy data. Ammonia production with the optimized BW/gC3N4 3.5:2 was 5.3 and 2.1 times higher than pure g‐C3N4 and Bi2WO6, respectively. Meanwhile, BW/g‐C3N4 demonstrates excellent photocatalytic activity towards antibiotic pollutant degradation as well. After 150 minutes of visible light irradiation, the removal of 94% ciprofloxacin (CIP) was observed. Finally, a possible mechanism is proposed for photocatalytic N2RR and CIP degradation.TOC: The distinctive feature of the Bi2WO6/g‐C3N4 hybrid is its innovative combination of Bi2WO6/g‐C3N4, creating a specialized interface that maximizes visible light absorption, enhances charge separation, and facilitates both N2 reduction reaction and pollutant degradation, and making a promising material for sustainable environmental application.This article is protected by copyright. All rights reserved.

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“…The concept suggests that the interfacial contact between components in heterojunction systems creates nanochannels, facilitating photogenerated charge migration . These systems have been widely used for photomediated processes for catalysis and pollutant remediation. − …”

Section: Introductionmentioning

confidence: 99%

CuO@Ag/NH₂-MIL-88B(Fe) Heterojunction Photocatalyst for the Photothermal Codriven Synthesis of Benzimidazoles and Biaryls

Mirzapour,

Jafarzadeh

2024

Ind. Eng. Chem. Res.

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A photocatalytic heterojunction system was designed by hybridizing silver-deposited CuO nanoparticles (NPs) with an iron-based metal−organic framework (MOF), NH 2 -MIL-88B. The resulting system, CuO@Ag/NH 2 -MIL-88B, was thoroughly characterized, and its photoactivity was evaluated by using diffuse reflectance and photoluminescence spectroscopies. The combination of NPs and the MOF led to a red shift of the photoabsorption edges of the MOF toward the visible region. The hybrid system exhibited an energy band gap of ∼1.86 eV, in contrast to the pristine MOF with a band gap of ∼2.05 eV. The creation of a heterojunction system, known as the Z-scheme, improved charge transport and minimized charge recombination. Furthermore, the CuO@Ag/NH 2 -MIL-88B system demonstrated synergistic photoactivity in the photothermal catalytic synthesis of benzimidazoles and biaryls under visible light irradiation (LED, 100 W), aided by surface plasmonic resonance. The study revealed a high product efficiency ranging from 78 to 95% for benzimidazoles and 70−80% for biaryls, achieved within a short reaction period of 2.5−3.5 h for benzimidazoles and 6−8 h for biaryls, showcasing the photo-and thermal stability of the photocatalyst. Additionally, the photocatalyst exhibited remarkable recyclability and reusability, highlighting its potential for practical applications.

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Construction of novel S-scheme LaFeO3/g-C3N4 composite with efficient photocatalytic capacity for dye degradation and Cr(VI) reduction

Cited by 27 publications

References 42 publications

Swallowed Embedding of Nanopetal-Rich Microflowers in Flexible Photocatalytic and Thermoresponsive Functional Composite Fibers

Swallowed Embedding of Nanopetal-Rich Microflowers in Flexible Photocatalytic and Thermoresponsive Functional Composite Fibers

Bi₂WO₆ Incorporation of g‐C₃N₄ to Enhance the Photocatalytic N₂ Reduction Reaction and Antibiotic Pollutants Removal

CuO@Ag/NH₂-MIL-88B(Fe) Heterojunction Photocatalyst for the Photothermal Codriven Synthesis of Benzimidazoles and Biaryls

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Construction of novel S-scheme LaFeO3/g-C3N4 composite with efficient photocatalytic capacity for dye degradation and Cr(VI) reduction

Cited by 27 publications

References 42 publications

Swallowed Embedding of Nanopetal-Rich Microflowers in Flexible Photocatalytic and Thermoresponsive Functional Composite Fibers

Swallowed Embedding of Nanopetal-Rich Microflowers in Flexible Photocatalytic and Thermoresponsive Functional Composite Fibers

Bi2WO6 Incorporation of g‐C3N4 to Enhance the Photocatalytic N2 Reduction Reaction and Antibiotic Pollutants Removal

CuO@Ag/NH2-MIL-88B(Fe) Heterojunction Photocatalyst for the Photothermal Codriven Synthesis of Benzimidazoles and Biaryls

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Product

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Bi₂WO₆ Incorporation of g‐C₃N₄ to Enhance the Photocatalytic N₂ Reduction Reaction and Antibiotic Pollutants Removal

CuO@Ag/NH₂-MIL-88B(Fe) Heterojunction Photocatalyst for the Photothermal Codriven Synthesis of Benzimidazoles and Biaryls