In situ fabrication of Bi2Se3/g-C3N4 S-scheme photocatalyst with improved photocatalytic activity

He, Ronghuan; Ou, Sijiao; Liu, Yexuan; Xu, Dongdong

doi:10.1016/s1872-2067(21)63911-6

Cited by 51 publications

(12 citation statements)

References 54 publications

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“…[38,39] Besides, the conversion from MCA to TCN is further confirmed in the FTIR spectrum, the characteristic peaks at 810, 1200-1600 and 3100-3500 cm −1 can be assigned to the vibrational absorption of triazine unit of g-C 3 N 4 , the typical stretching structure of the CN heterocycle, and the vibrational absorption of NH and OH, respectively (Figure S2d, Supporting Information), confirming that the MCA is converted into TCN successfully. [20,40]…”

Section: The Formation and Characterization Of Tcnmentioning

confidence: 99%

Double‐Shelled Porous g‐C₃N₄ Nanotubes Modified with Amorphous Cu‐Doped FeOOH Nanoclusters as 0D/3D Non‐Homogeneous Photo‐Fenton Catalysts for Effective Removal of Organic Dyes

Tang

Sui

et al. 2023

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Graphite phased carbon nitride (g‐C3N4) has attracted extensive attention attributed to its non‐toxic nature, remarkable physical–chemical stability, and visible light response properties. Nevertheless, the pristine g‐C3N4 suffers from the rapid photogenerated carrier recombination and unfavorable specific surface area, which greatly limit its catalytic performance. Herein, 0D/3D Cu‐FeOOH/TCN composites are constructed as photo‐Fenton catalysts by assembling amorphous Cu‐FeOOH clusters on 3D double‐shelled porous tubular g‐C3N4 (TCN) fabricated through one‐step calcination. Combined density functional theory (DFT) calculations, the synergistic effect between Cu and Fe species could facilitate the adsorption and activation of H2O2, and the separation and transfer of photogenerated charges effectively. Thus, Cu‐FeOOH/TCN composites acquire a high removal efficiency of 97.8%, the mineralization rate of 85.5% and a first‐order rate constant k = 0.0507 min−1 for methyl orange (MO) (40 mg L−1) in photo‐Fenton reaction system, which is nearly 10 times and 21 times higher than those of FeOOH/TCN (k = 0.0047 min−1) and TCN (k = 0.0024 min−1), respectively, indicating its universal applicability and desirable cyclic stability. Overall, this work furnishes a novel strategy for developing heterogeneous photo‐Fenton catalysts based on g‐C3N4 nanotubes for practical wastewater treatment.

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Section: The Formation and Characterization Of Tcnmentioning

confidence: 99%

Double‐Shelled Porous g‐C₃N₄ Nanotubes Modified with Amorphous Cu‐Doped FeOOH Nanoclusters as 0D/3D Non‐Homogeneous Photo‐Fenton Catalysts for Effective Removal of Organic Dyes

Tang

Sui

et al. 2023

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“…Up to now, the various S-scheme heterojunctions have been developed and utilized to convert solar energy into usable chemical fuels to decrease the use of fossil fuels, and the Sscheme heterojunctions can also be used to degrade the pollutants to reduce the harmful impact on environment associated with the consumption of fossil fuels (Fig. 2), including hydrogen evolution [31][32][33] , degradation pollutant [34][35][36] , reduction of CO2 [37][38][39] , H2O2 production 40,41 and so on.…”

Section: Introductionmentioning

confidence: 99%

Review of S-Scheme Heterojunction Photocatalyst for H<sub>2</sub>O<sub>2</sub> Production

Zhang¹,

Li²,

Yuan³

et al. 2023

Acta Physico Chimica Sinica

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Rapid industrialization throughout the 20th and 21st centuries has led to the excessive consumption of fossil fuels to satisfy global energy demands. The dominant use of these fuel sources is the main cause of the ever-increasing environmental issues that greatly threaten humanity. Therefore, the development of renewable energy sources is fundamental to solving environmental issues. Solar energy has received widespread attention over the past decades as a green and sustainable energy source. Solar radiation-induced photocatalytic processes on the surface of semiconductor materials are able to convert solar energy into other energy sources for storage and further applications. However, the preparation of highly efficient and stable photocatalysts remains challenging. Recently, a new step-scheme (S-scheme) carrier migration mechanism was reported that solves the drawbacks of carrier migration in conventional heterojunction photocatalysts. The S-scheme heterojunction not only effectively solves the carrier migration problem and achieves fast separation but also preserves the powerful redox abilities and improves the catalytic performance of the photocatalytic system. To date, various S-scheme heterojunctions have been developed and employed to convert solar energy into useful chemical fuels to decrease the reliance on fossil fuels. Furthermore, these systems can also be used to degrade pollutants and reduce the harmful impact on the environment associated with the consumption of fossil fuels, including H2 evolution, pollutant degradation, and the reduction of CO2. H2O2 has been used as an effective, multipurpose, and green oxidizing agent in many applications including pollutant purification, medical disinfection, and chemical synthesis. It has also been used as a high-density energy carrier for fuel cells, with only water and oxygen produced as by-products. Photocatalytic technology provides a low-cost, environmentally friendly, and safe way to produce H2O2, requiring only solar energy, H2O, and O2 gas as raw materials. This paper reviews new S-scheme heterojunction designs for photocatalytic H2O2 production, including g-C3N4-, sulfide-, TiO2-, and ZnO-based S-scheme heterojunctions. The main principles of photocatalytic H2O2 production and the formation mechanism of the S-scheme heterojunction are also discussed. In addition, effective advanced characterization methods for S-scheme heterojunctions have been analyzed. Finally, the challenges that need to be addressed and the direction of future research are identified to provide new methods for the development of high-performance photocatalysts for H2O2 production.

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“…Graphite-like carbon nitride (g-C3N4) has good thermodynamic stability due to its unique band structure and chemical structure, which can maintain good photocatalytic performance at high temperatures [1] . Additionally, g-C3N4 has many advantages, such as easy availability of raw materials, non-toxicity, low manufacturing cost, and environmental protection [2] . However, g-C3N4 has defects such as a small specific surface area, weak photo-generated carrier transport capacity, and narrow visible light response range [3] , which severely restricts its use in photocatalysis and other fields.…”

Section: Introductionmentioning

confidence: 99%

Study on the preparation of Bi2WO6/g-C3N4 heterostructure and its photocatalytic property

Han¹,

Liu²,

Zhang³

et al. 2023

International Conference on Optoelectronic Materials and Devices (ICOMD 2022)

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Graphite-like carbon nitride (g-C3N4) is an attractive photocatalyst, but its weak photo-generated carrier transport ability severely limits its application in photocatalysis. However, g-C3N4-based heterostructure photocatalysts have been widely investigated for their significantly enhanced photo generated electron-hole separation efficiency. In this paper, g-C3N4 was firstly prepared by thermal polycondensation with urea as raw material, and then the Bi2WO6/g-C3N4 heterostructure photocatalyst was prepared by hydrothermal method. The photocatalytic degradation of methyl orange by Bi2WO6 andg-C3N4 before and after composite under simulated solar radiation was studied. The results showed that the composite modification of g-C3N4 by Bi2WO6 was achieved by the hydrothermal method, and the photocatalytic performance of the heterogeneous structure photocatalyst was significantly improved compared with that of the non-composite monomer photocatalyst. The photocatalytic performance of the produced heterostructure photocatalyst is the greatest among them when the mass ratio of Bi2WO6 to g-C3N4 is 10:1, and the degree of methyl orange degradation reaches 90.37%after 4hof radiation.

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In situ fabrication of Bi2Se3/g-C3N4 S-scheme photocatalyst with improved photocatalytic activity

Cited by 51 publications

References 54 publications

Double‐Shelled Porous g‐C₃N₄ Nanotubes Modified with Amorphous Cu‐Doped FeOOH Nanoclusters as 0D/3D Non‐Homogeneous Photo‐Fenton Catalysts for Effective Removal of Organic Dyes

Double‐Shelled Porous g‐C₃N₄ Nanotubes Modified with Amorphous Cu‐Doped FeOOH Nanoclusters as 0D/3D Non‐Homogeneous Photo‐Fenton Catalysts for Effective Removal of Organic Dyes

Review of S-Scheme Heterojunction Photocatalyst for H<sub>2</sub>O<sub>2</sub> Production

Study on the preparation of Bi2WO6/g-C3N4 heterostructure and its photocatalytic property

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In situ fabrication of Bi2Se3/g-C3N4 S-scheme photocatalyst with improved photocatalytic activity

Cited by 51 publications

References 54 publications

Double‐Shelled Porous g‐C3N4 Nanotubes Modified with Amorphous Cu‐Doped FeOOH Nanoclusters as 0D/3D Non‐Homogeneous Photo‐Fenton Catalysts for Effective Removal of Organic Dyes

Double‐Shelled Porous g‐C3N4 Nanotubes Modified with Amorphous Cu‐Doped FeOOH Nanoclusters as 0D/3D Non‐Homogeneous Photo‐Fenton Catalysts for Effective Removal of Organic Dyes

Review of S-Scheme Heterojunction Photocatalyst for H<sub>2</sub>O<sub>2</sub> Production

Study on the preparation of Bi2WO6/g-C3N4 heterostructure and its photocatalytic property

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Double‐Shelled Porous g‐C₃N₄ Nanotubes Modified with Amorphous Cu‐Doped FeOOH Nanoclusters as 0D/3D Non‐Homogeneous Photo‐Fenton Catalysts for Effective Removal of Organic Dyes

Double‐Shelled Porous g‐C₃N₄ Nanotubes Modified with Amorphous Cu‐Doped FeOOH Nanoclusters as 0D/3D Non‐Homogeneous Photo‐Fenton Catalysts for Effective Removal of Organic Dyes