Visible-light photocatalytic activity enhancement of red phosphorus dispersed on the exfoliated kaolin for pollutant degradation and hydrogen evolution

Guo, Cangchen; Du, Hong; Ma, Yuhua; Qi, Kezhen; Zhu, Enquan; Su, Zhi; Huojiaaihemaiti, Miliban; Wang, Xin

doi:10.1016/j.jcis.2020.11.055

Cited by 34 publications

(13 citation statements)

References 47 publications

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“…EIS measurements (Figure a) could be used to characterize the rate of charge carrier migration. , The experiment was conducted in the CHI660E electrochemical workstation. A three-electrode system was used, where the calomel electrode, platinum electrode, and ITO-loaded photocatalyst were the reference electrode, counter electrode, and working electrode, respectively.…”

Section: Resultsmentioning

confidence: 99%

Broad Spectral Response Z-Scheme Three-Dimensional Ordered Macroporous Carbon Quantum Dots/TiO₂/g-C₃N₄ Composite for Boosting Photocatalysis

Liu

Wang

et al. 2022

Langmuir

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Photocatalytic degradation technology is one of the effective protocols to solve environmental problems. TiO 2 has always been favored for its photostability and low cost. However, the insufficient photocatalytic activity of TiO 2 limits its application due to the severe recombination of photogenerated electrons and holes and a narrow light response range. Therefore, 3DTCN, a TiO 2 /g-C 3 N 4 composite with a three-dimensional ordered macroporous structure was prepared by a colloidal crystal template technique to form a heterojunction for inhibiting the photogenerated electron−hole recombination. On 3DTCN, carbon quantum dots (CQDs) were loaded by impregnation to obtain x % CQDs/3DTCN with a broad spectral response to light. The physical and chemical properties of samples were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM), high-resolution-TEM, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, Brunauer−Emmett−Teller analysis, photoluminescence spectroscopy, and ultraviolet−visible diffuse reflectance spectroscopy. The photocatalytic activity was evaluated via degrading the rhodamine B (RhB) dye, and the degradation efficiency of 1% CQDs/3DTCN (98%) was found to be much higher than that of 3DTCN (42%) in 80 min under simulated sunlight irradiation. Furthermore, it also possessed excellent durability. Meanwhile, the sample also showed an outstanding photoelectric property. Finally, the proposed mechanism of the composites had been mainly analyzed by density functional theory calculations. This work thus provides an idea to form a 3D structure heterojunction and further improve the photocatalytic activity.

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Section: Resultsmentioning

confidence: 99%

Broad Spectral Response Z-Scheme Three-Dimensional Ordered Macroporous Carbon Quantum Dots/TiO₂/g-C₃N₄ Composite for Boosting Photocatalysis

Liu

Wang

et al. 2022

Langmuir

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“…SEM analysis was selected to study the morphology of the prepared samples and the heterojunction interface between BFO and HRP. As shown in Figure 2A and B, the HRP 19 surface had many microporous structures, leading to enlarged specific surface area and contributed to the adsorption of contaminated substrates during the catalytic process. The SEM images of BFO are illustrated in Figure 2C and D and showed the agglomeration of the pure BFO, consistent with the particle size analysis.…”

Section: Resultsmentioning

confidence: 99%

“…Red phosphorus (RP) is a novel non-metallic semiconductor photocatalyst with suitable energy band structure and bandgap width (E g =1.8 eV), therefore, RP-based photocatalysts are often used for photocatalytic water splitting to produce hydrogen, [15][16][17][18][19] photodegradation of organic pollutants, [20][21][22][23][24] and photoreduction of heavy metal ions. 21,25,26 Whereas, the photogenerated electrons and holes of RP are easily recombined in the bulk, limiting its photocatalytic performance and leaving it far from practical applications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Construction of Bi₂Fe₄O₉/red phosphorus heterojunction for rapid and efficient photo‐reduction of Cr(VI)

Zhu

Zhao

et al. 2021

J Am Ceram Soc

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Construction of heterojunctions with matching energy band structures between two semiconductors displays great potential in promoting the separation and transfer of photogenerated charge carriers and is one of the effective strategies for obtaining high active photocatalysts. In this study, a type-II heterojunction photocatalyst was designed and prepared using Bi 2 Fe 4 O 9 (BFO) nanoparticles and hydrothermaltreated red phosphorus (HRP). The photocatalytic performance test exhibited that the 3%BFO/HRP composite photocatalyst with 3% mass fraction of BFO rapidly and efficiently photoreduced Cr(VI), and the reduction was completed within 25 min, with a rate constant of 0.15 min −1 , which was 15 times higher than that of pure HRP. Further mechanistic investigation revealed that the photocatalytic activity was enhanced due to the tight heterojunction between BFO and HRP, thereby effectively promoting carrier transfer, destroying the carrier recombination, and reducing the charge-transfer resistance of composite catalyst. Mott-Schottky diagrams and UV-vis diffuse reflectance spectroscopy data indicated the theoretical feasibility of establishing a close contact between BFO and HRP. X-ray photoelectron spectroscopy provided evidence for the way in which interfacial charges were transferred. This work provides a new possibility to construct heterojunction photocatalysts for the rapid and efficient reduction of Cr(VI).

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“…To surmount the agglomeration and overgrowth of RP photocatalyst and minimize the distance for charge carrier transportation, kaolin with a 3D configuration was composited with hydrothermally treated RP to form a RP/kaolin hybrid photocatalytic system for improved H 2 generation reactions. 281 The seamless and intimate contact between RP and kaolin was first established according to the HRTEM analysis, which was advantageous for the creation of an effective route for the transfer of electron−hole pairs. The excellent adsorption and uniform dispersion of microporous RP photocatalyst on kaolin was subsequently verified by the field emission scanning electron microscope (FESEM) assessment whereby the immobilization of RP on kaolin conferred the construction of evenly dispersed NPs ascribed to the powerful interactive forces between kaolin and RP interfaces, which favorably impeded the agglomeration and overgrowth of RP photocatalyst.…”

Section: Applications Of Red Phosphorus In Photocatalysismentioning

confidence: 99%

Red Phosphorus: An Up-and-Coming Photocatalyst on the Horizon for Sustainable Energy Development and Environmental Remediation

Fung

Tan

et al. 2021

Chem. Rev.

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Photocatalysis is a perennial solution that promises to resolve deep-rooted challenges related to environmental pollution and energy deficit through harvesting the inexhaustible and renewable solar energy. To date, a cornucopia of photocatalytic materials has been investigated with the research wave presently steered by the development of novel, affordable, and effective metal-free semiconductors with fascinating physicochemical and semiconducting characteristics. Coincidentally, the recently emerged red phosphorus (RP) semiconductor finds itself fitting perfectly into this category ascribed to its earth abundant, low-cost, and metal-free nature. More notably, the renowned red allotrope of the phosphorus family is spectacularly bestowed with strengthened optical absorption features, propitious electronic band configuration, and ease of functionalization and modification as well as high stability. Comprehensively detailing RP’s roles and implications in photocatalysis, this review article will first include information on different RP allotropes and their chemical structures, followed by the meticulous scrutiny of their physicochemical and semiconducting properties such as electronic band structure, optical absorption features, and charge carrier dynamics. Besides that, state-of-the-art synthesis strategies for developing various RP allotropes and RP-based photocatalytic systems will also be outlined. In addition, modification or functionalization of RP with other semiconductors for promoting effective photocatalytic applications will be discussed to assess its versatility and feasibility as a high-performing photocatalytic system. Lastly, the challenges facing RP photocatalysts and future research directions will be included to propel the feasible development of RP-based systems with considerably augmented photocatalytic efficiency. This review article aspires to facilitate the rational development of multifunctional RP-based photocatalytic systems by widening the cognizance of rational engineering as well as to fine-tune the electronic, optical, and charge carrier properties of RP.

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Visible-light photocatalytic activity enhancement of red phosphorus dispersed on the exfoliated kaolin for pollutant degradation and hydrogen evolution

Cited by 34 publications

References 47 publications

Broad Spectral Response Z-Scheme Three-Dimensional Ordered Macroporous Carbon Quantum Dots/TiO₂/g-C₃N₄ Composite for Boosting Photocatalysis

Broad Spectral Response Z-Scheme Three-Dimensional Ordered Macroporous Carbon Quantum Dots/TiO₂/g-C₃N₄ Composite for Boosting Photocatalysis

Construction of Bi₂Fe₄O₉/red phosphorus heterojunction for rapid and efficient photo‐reduction of Cr(VI)

Red Phosphorus: An Up-and-Coming Photocatalyst on the Horizon for Sustainable Energy Development and Environmental Remediation

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Visible-light photocatalytic activity enhancement of red phosphorus dispersed on the exfoliated kaolin for pollutant degradation and hydrogen evolution

Cited by 34 publications

References 47 publications

Broad Spectral Response Z-Scheme Three-Dimensional Ordered Macroporous Carbon Quantum Dots/TiO2/g-C3N4 Composite for Boosting Photocatalysis

Broad Spectral Response Z-Scheme Three-Dimensional Ordered Macroporous Carbon Quantum Dots/TiO2/g-C3N4 Composite for Boosting Photocatalysis

Construction of Bi2Fe4O9/red phosphorus heterojunction for rapid and efficient photo‐reduction of Cr(VI)

Red Phosphorus: An Up-and-Coming Photocatalyst on the Horizon for Sustainable Energy Development and Environmental Remediation

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Broad Spectral Response Z-Scheme Three-Dimensional Ordered Macroporous Carbon Quantum Dots/TiO₂/g-C₃N₄ Composite for Boosting Photocatalysis

Broad Spectral Response Z-Scheme Three-Dimensional Ordered Macroporous Carbon Quantum Dots/TiO₂/g-C₃N₄ Composite for Boosting Photocatalysis

Construction of Bi₂Fe₄O₉/red phosphorus heterojunction for rapid and efficient photo‐reduction of Cr(VI)