Bi2O3 particles decorated on porous g-C3N4 sheets: Enhanced photocatalytic activity through a direct Z-scheme mechanism for degradation of Reactive Black 5 under UV–vis light

Shafawi, Anis Natasha; Mahmud, Rabiatul Aliah; Ali, Khozema Ahmed; Putri, Lutfi Kurnianditia; Rosli, Noor Izzati Md; Mohamed, Abdul Rahman

doi:10.1016/j.jphotochem.2019.112289

Cited by 67 publications

(12 citation statements)

References 83 publications

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“…In addition, H 2 O 2 can raise the photocatalytic activities by the hydroxyl radicals' productions from the degradation of a natural organic matter up to 71% for 5 h [455]. Shafawi et al prepared Bi 2 O 3 particles decorated on porous g-C 3 N 4 sheets by impregnation method [456]. 1 g/L of the composite containing g-C 3 N 4 with 9 wt % Bi 2 O 3 at 10 ppm reactive black 5 (RB 5) at pH = 5.7 demonstrated 84% degradation efficiency under UV-vis light for 120 min.…”

Section: Photodegradation Of Organic Pollutantsmentioning

confidence: 99%

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

2022

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g-C3N4 has drawn lots of attention due to its photocatalytic activity, low-cost and facile synthesis, and interesting layered structure. However, to improve some of the properties of g-C3N4, such as photochemical stability, electrical band structure, and to decrease charge recombination rate, and towards effective light-harvesting, g-C3N4–metal oxide-based heterojunctions have been introduced. In this review, we initially discussed the preparation, modification, and physical properties of the g-C3N4 and then, we discussed the combination of g-C3N4 with various metal oxides such as TiO2, ZnO, FeO, Fe2O3, Fe3O4, WO3, SnO, SnO2, etc. We summarized some of their characteristic properties of these heterojunctions, their optical features, photocatalytic performance, and electrical band edge positions. This review covers recent advances, including applications in water splitting, CO2 reduction, and photodegradation of organic pollutants, sensors, bacterial disinfection, and supercapacitors. We show that metal oxides can improve the efficiency of the bare g-C3N4 to make the composites suitable for a wide range of applications. Finally, this review provides some perspectives, limitations, and challenges in investigation of g-C3N4–metal-oxide-based heterojunctions.

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Section: Photodegradation Of Organic Pollutantsmentioning

confidence: 99%

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

2022

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“…When the pollutant and the catalyst surface carry the same charge, the two will create a repulsive force and the adsorption performance of the catalyst will be reduced, which is not conducive to the photocatalytic reaction, ultimately leading to a reduction in photocatalytic effect. 60,61 3.7.6 Cycle test. The stability and recyclability of the photocatalyst are related to the application of the photocatalyst.…”

Section: 74mentioning

confidence: 99%

Efficient photocatalytic degradation of tetracycline by Z-scheme CuSnO₃/g-C₃N₄ heterojunctions coupling with H₂O₂ under visible light irradiation

Wang

Xia

et al. 2022

New J. Chem.

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“…[53,54] Both embedded Ag 2 O and magnetite on the LDH can respond to the visible light by photogeneration of electron-hole pairs, despite the LDH having no electron transfer under visible light. [55][56][57] Meanwhile, some of the photogenerated electrons at the conduction band (CB) energy level of Ag 2 O (+0.2 eV) [58] could transfer to the CB of Hence, ZnAl-LDH as an n-type semiconductor indirectly responds to visible light and transfers the received electron to the dissolved oxygen to form •O 2 À radicals and •OH, respectively, by combining with water. Besides, extra •OH can be released by the reaction between the facial OH À groups on the LDH and produced holes.…”

Section: Investigation Of Photodegradation Mechanismmentioning

confidence: 99%

“…[53,54] Both embedded Ag 2 O and magnetite on the LDH can respond to the visible light by photogeneration of electron-hole pairs, despite the LDH having no electron transfer under visible light. [55][56][57] Meanwhile, some of the photogenerated electrons at the conduction band (CB) energy level of Ag 2 O (+0.2 eV) [58] could transfer to the CB of Fe Besides, extra •OH can be released by the reaction between the facial OH À groups on the LDH and produced holes. [59] Because the CB potential of Ag 2 O (+1.4 eV) [54] is higher than the standard redox potential of •OH/H 2 O (+2.68 eV), [60] the holes on the VB of Ag 2 O cannot produce •OH.…”

Section: Investigation Of Photodegradation Mechanismmentioning

confidence: 99%

Visible light photodegradation of 4‐nitrophenol by new high‐performance and easy recoverable Fe₃O₄/Ag₂O‐LDH hybrid photocatalysts

Dinari

Dadkhah

2021

Applied Organom Chemis

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Till now, water contaminant photodegradation has been the most influential method to remove low but dangerous concentrations of pollutants. Herein, a green method was employed to enhance the photocatalytic activity of ZnAl-LDH through depositing Ag and magnetite nanoparticles on the surface of layered double hydroxide (LDH) sheets. The structural and electrochemical characterization of as-prepared Zn 3 Al-CO 3 (ZA-LDH) and Fe 3 O 4 /Ag 2 O-LDH (M 10 A 5 -LDH) composite was determined by X-ray diffraction (XRD) analysis, Brunauer-Emmett-Teller (BET) theory, field emission scanning electron microscopy (FESEM) along with energy-dispersive X-ray spectroscopy (EDX) mapping, UV-vis diffuse reflectance spectra, photoluminescence spectra, and transient photocurrent response. All of the analyses confirmed the photoresponse enhancement of the M 10 A 5 -LDH compared with virgin LDH. The mineralization of p-nitrophenol (PNP) under visible light revealed that the photodegradation rate of composite (0.02 min À1 ) is fourfold more significant than that of the bare ZA-LDH (0.005 min À1 ). The active radical capturing tests exhibited that h + , •OH, and •O 2 À play substantial roles in PNP degradation, respectively. The potential photodegradation mechanism involves the charge transfer from Fe 3 O 4 and Ag 2 O to LDH, producing active radicals for the degradation process. K E Y W O R D S 4-nitrophenol, easy recoverable, Fe 3 O 4 /Ag 2 O-LDH, magnetic nanocomposite, photodegradation | INTRODUCTIONAs the most toxic mono-nitrophenol, 4-nitrophenol (4-NP) is a severe threat to ecological systems, and even 20 mg L À1 of it could raise the risk of cancer. [1] The most common sources of 4-NP in wastewaters are pesticides, medicines, dyes, explosives, leather coloring agents, and plastics. [2,3] It also can deposit in the soil as a hydrolysis product of organophosphorus insecticides like parathion and methyl parathion. [4] To minimize the amount of 4-NP in the environment, many different techniques with chemical, biological, and physical approaches were developed. Even though all the accomplishments have been made using these technologies, high-energy consumption, secondary contamination, and low proficiency are the weaknesses of these methods. Therefore, advanced oxidation processes (AOPs) are introduced as an alternative, which has no harmful product, has no expensive

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Bi2O3 particles decorated on porous g-C3N4 sheets: Enhanced photocatalytic activity through a direct Z-scheme mechanism for degradation of Reactive Black 5 under UV–vis light

Cited by 67 publications

References 83 publications

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

Efficient photocatalytic degradation of tetracycline by Z-scheme CuSnO₃/g-C₃N₄ heterojunctions coupling with H₂O₂ under visible light irradiation

Visible light photodegradation of 4‐nitrophenol by new high‐performance and easy recoverable Fe₃O₄/Ag₂O‐LDH hybrid photocatalysts

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Bi2O3 particles decorated on porous g-C3N4 sheets: Enhanced photocatalytic activity through a direct Z-scheme mechanism for degradation of Reactive Black 5 under UV–vis light

Cited by 67 publications

References 83 publications

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

Efficient photocatalytic degradation of tetracycline by Z-scheme CuSnO3/g-C3N4 heterojunctions coupling with H2O2 under visible light irradiation

Visible light photodegradation of 4‐nitrophenol by new high‐performance and easy recoverable Fe3O4/Ag2O‐LDH hybrid photocatalysts

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Efficient photocatalytic degradation of tetracycline by Z-scheme CuSnO₃/g-C₃N₄ heterojunctions coupling with H₂O₂ under visible light irradiation

Visible light photodegradation of 4‐nitrophenol by new high‐performance and easy recoverable Fe₃O₄/Ag₂O‐LDH hybrid photocatalysts