Enhanced photocatalytic degradation of bisphenol A over N,S-doped carbon quantum dot-modified MIL-101(Fe) heterostructure composites under visible light irradiation by persulfate

He, Jin; Zhong, Yongwang; Tian, Kaixun; Pang, Haoliang; Hao, Yaoyao

doi:10.1016/j.apsusc.2021.151902

Cited by 32 publications

(5 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The performance of H 2 -g-C 3 N 4 was further compared with those of the reported materials for persulfate activation. As shown in Figure d (Table S3), our defective crystalline carbon nitride exhibits a state-of-the-art photoactivity for persulfate activation, which is far more active than the reported ones based on TiO 2 , BiOI, Zn 2 SnO 4 , MOFs, etc. − …”

Section: Resultsmentioning

confidence: 75%

Hydrogen-Induced Defective Crystalline Carbon Nitride with Enhanced Bidirectional Charge Migration for Persulfate Photoactivation

et al. 2023

View full text Add to dashboard Cite

A feasible way to overcome the moderate photoactivity of carbon nitride is by decreasing the carrier diffusion distance and increasing the intralayer active sites by synthesizing defective crystalline carbon nitride. However, the additive-free synthesis of this type of structure remains a great challenge, due to the trade-off between crystallinity control and defect modulation. Herein, we demonstrate the hydrogen-assisted synthesis of ultrathin carbon nitride nanosheets with efficient exciton dissociation and fast electron transfer. Experimental and theoretical investigations indicate that hydrogen not only facilitates intermolecular cross-linking for crystallization but also generates abundant nitrogen vacancies among non-hydrogen-bonded tri-s-triazine units for charge transportation. The simultaneous modulation of interlayer and intralayer interactions contributes to the efficient bidirectional charge transfer during photocatalytic reactions. The synergy of defective crystalline carbon nitride and persulfate oxidants results in a striking performance for contaminant degradation, with 9.2-and 18.4-times higher activity than separate photocatalysis and persulfate photoactivated by bulk g-C 3 N 4 , respectively. This work not only provides a facile approach to synthesizing defective crystalline carbon nitride without employing any extrinsic additives but also opens up a new avenue to improve the efficiency of metal-free photocatalysts by bidirectional charge modulation.

show abstract

Section: Resultsmentioning

confidence: 75%

Hydrogen-Induced Defective Crystalline Carbon Nitride with Enhanced Bidirectional Charge Migration for Persulfate Photoactivation

et al. 2023

View full text Add to dashboard Cite

show abstract

“…This can be interpreted as the CQDs were anchored on the surface of MOFs by reacting with the free carboxyl (-COO-) of the organic linker in MIL-101(Fe), leading to a decrease in the number of carboxyl groups, and thus the intensity of the peak at 1599 cm À1 became weaker. 62 The new peak at 1540 cm À1 can be ascribed to the CQO bond and carboxyl on the surface of CQDs and its slight blue shift may be due to the formation of hydrogen bonds with the polar solvents during the synthesis of S-MIL-101(Fe)/CQDs.…”

Section: Resultsmentioning

confidence: 99%

Sulfur-modulated metal–organic framework MIL-101(Fe) with CQDs anchored as an efficient light-driven photocatalyst: photocatalytic performance and mechanism investigation

Huang

Wang

et al. 2023

New J. Chem.

View full text Add to dashboard Cite

show abstract

“…[37] Compared with MOF-derived Fe 2 O 3 /C (Figure S10, Supporting Information), a shift of typical peaks to the lower energy after CVD super-assembly was attributed to generation of Fe 3 O 4 nanocrystal and introduction of N species. [36,38] Among four organonitrogen guests, it is worth noting that the loading of thiourea resulted in an obvious shift (1.0 eV) to lower binding energy of Fe III O, which was mainly attributed to the introduction of electronegative N and S species. Figure 4e shows that C 1s spectra are resolved into 284.8 (CC), 286.5 (CN), and 288.7 eV (CO).…”

Section: Resultsmentioning

confidence: 99%

Transformation of Organonitrogen‐Encapsulated MOFs into N‐Doped Fe₃O₄@C Nanopolyhedron via CVD Super‐Assembly for Photochemical Oxidation

Yang

Mao

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

Development of nano-structured metal oxides/heteroatom composites with controlled components and structure for photochemical oxidation still remains a great challenge. Here, a new and versatile strategy is reported for transformation of organonitrogen-encapsulated metal-organic frameworks (MOFs) into N-doped Fe 3 O 4 @C nanopolyhedron by chemical vapor deposition-induced super-assembly method. Strong confined interaction between organonitrogen guests (urea, thiourea, melamine, and dimethylimidazole) and Fe nodes of MOFs realizes reconstruction of crystal structure and introduction of N species. With the novel approach, the uniform dispersion of guests and perfect metallic/heteroatom interfacial is obtained. Compared with MOFs-derived Fe 2 O 3 /C, the heteroatom/defect-to-metal cluster charge transfer excitations lead N-doped Fe 3 O 4 @C to exhibit more superior activity for photocatalytic oxidation (turn-over frequencies as high as 3.72 h −1 ). It demonstrates that the introduction of abundant pyrrole-N and oxygen vacancies on carbon interface boosts the advance of photo-generated carrier transfer. The study offers a simple and promising strategy for the design of novel metal oxides/heteroatom composite with adjustable structure and functions.

show abstract

Enhanced photocatalytic degradation of bisphenol A over N,S-doped carbon quantum dot-modified MIL-101(Fe) heterostructure composites under visible light irradiation by persulfate

Cited by 32 publications

References 48 publications

Hydrogen-Induced Defective Crystalline Carbon Nitride with Enhanced Bidirectional Charge Migration for Persulfate Photoactivation

Hydrogen-Induced Defective Crystalline Carbon Nitride with Enhanced Bidirectional Charge Migration for Persulfate Photoactivation

Sulfur-modulated metal–organic framework MIL-101(Fe) with CQDs anchored as an efficient light-driven photocatalyst: photocatalytic performance and mechanism investigation

Transformation of Organonitrogen‐Encapsulated MOFs into N‐Doped Fe₃O₄@C Nanopolyhedron via CVD Super‐Assembly for Photochemical Oxidation

Contact Info

Product

Resources

About

Enhanced photocatalytic degradation of bisphenol A over N,S-doped carbon quantum dot-modified MIL-101(Fe) heterostructure composites under visible light irradiation by persulfate

Cited by 32 publications

References 48 publications

Hydrogen-Induced Defective Crystalline Carbon Nitride with Enhanced Bidirectional Charge Migration for Persulfate Photoactivation

Hydrogen-Induced Defective Crystalline Carbon Nitride with Enhanced Bidirectional Charge Migration for Persulfate Photoactivation

Sulfur-modulated metal–organic framework MIL-101(Fe) with CQDs anchored as an efficient light-driven photocatalyst: photocatalytic performance and mechanism investigation

Transformation of Organonitrogen‐Encapsulated MOFs into N‐Doped Fe3O4@C Nanopolyhedron via CVD Super‐Assembly for Photochemical Oxidation

Contact Info

Product

Resources

About

Transformation of Organonitrogen‐Encapsulated MOFs into N‐Doped Fe₃O₄@C Nanopolyhedron via CVD Super‐Assembly for Photochemical Oxidation