A novel nitrogenous core-shell MIL-101(Fe)-based nanocomposite for enhanced adsorption and photo-degradation of organic pollutant under visible light

Song, Xiaoli; Zhu, Tong; Yu, Shangkui; Wang, Junlong; Liu, Junliang; Zhang, Shuwei

doi:10.1016/j.jallcom.2022.168479

Cited by 19 publications

(8 citation statements)

References 65 publications

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“…TC can transfer along the biological chain, accumulate in the body, generate drug-resistant bacteria, and pose a serious threat to human health and ecological safety. It is important to remove TC from the wastewater. − …”

Section: Introductionmentioning

confidence: 99%

Tuning Band Gap in Fe-Doped g-C₃N₄by Zn for Enhanced Fenton-Like Catalytic Performance

Jiang

Nan

2023

Inorg. Chem.

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Multiple oxidation states of first-row transition-metal cations were always doped in g-C3N4 to enhance the catalytic activity by the synergistic action between the cations in the Fenton-like reaction. It remains a challenge for the synergistic mechanism when the stable electronic centrifugation (3d 10) of Zn2+ was used. In this work, Zn2+ was facilely introduced in Fe-doped g-C3N4 (named xFe/yZn-CN). Compared with Fe-CN, the rate constant of the tetracycline hydrochloride (TC) degradation increased from 0.0505 to 0.0662 min–1 for 4Fe/1Zn-CN. The catalytic performance was more outstanding than those of similar catalysts reported. The catalytic mechanism was proposed. With the introduction of Zn2+ in 4Fe/1Zn-CN, the atomic percent of Fe (Fe2+ and Fe3+) and the molar ratio of Fe2+ to Fe3+ at the catalyst’s surface increased, where Fe2+ and Fe3+ were the active sites for adsorption and degradation. In addition, the band gap of 4Fe/1Zn-CN decreased, leading to enhanced electron transfer and conversion from Fe3+ to Fe2+. These changes resulted in the excellent catalytic performance of 4Fe/1Zn-CN. Radicals •OH, •O2 –, and 1O2 formed in the reaction and took different actions under various pH values. 4Fe/1Zn-CN exhibited excellent stability after five cycles under the same conditions. These results may give a strategy for synthesizing Fenton-like catalysts.

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Section: Introductionmentioning

confidence: 99%

Tuning Band Gap in Fe-Doped g-C₃N₄by Zn for Enhanced Fenton-Like Catalytic Performance

Jiang

Nan

2023

Inorg. Chem.

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“…The PL spectra of MIL-101(Fe) and M-MIL-101(Fe) are presented in Fig. 2 d. As shown, M-MIL-101(Fe) exhibits a lower PL peak intensity compared to MIL-101(Fe), indicating the stronger separation rate of the electron–hole pairs 38 .…”

Section: Resultsmentioning

confidence: 90%

“…They achieved a > 99% removal of RhB as a model pollutant within 15 min. Song et al 38 prepared a nitrogenous core–shell MIL-101(Fe)-based nanocomposite by using a poly-nitrogen conjugated molecule for photodegradation and adsorption of TC. They achieved the removal efficiency and maximum adsorption capacity of 95% and 576.13 mg g −1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Boosting the adsorptive and photocatalytic performance of MIL-101(Fe) against methylene blue dye through a thermal post-synthesis modification

Fattahi,

Niazi,

Esmaeili

et al. 2023

Sci Rep

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Photocatalytic degradation under ultra-low powered light is a viable advanced oxidation process technique against extensive emerging contaminants. As a new and remarkable class of nanoporous materials, metal-organic frameworks (MOFs), attract interest for the supreme adsorptive and photocatalytic functionalities. An outstanding MOF, MIL-101(Fe) chosen as a photocatalyst template for the synthesis of α-Fe2O3 by a simple thermal modification to improve the structural properties toward methylene blue (MB) eradication. Octahedron-like α-Fe2O3 photocatalyst (Modified MIL-101(Fe), M-MIL-101(Fe)) was superior in dispersion and separation properties in aqueous medium. Moreover, the adsorptive and catalytic performance was increased for modified form by ~ 7.3% and ~ 17.1% compared to pristine MIL-101(Fe), respectively. Synergistic improvement of MB removal achieved by simultaneous adsorption/degradation under 5-W LED irradiation. Parametric study indicated an 18.1% and 44.5% improvement in MB removal was observed by increasing pH from 4 to 10, and M-MIL-101(Fe) dose from 0.2 to 1 g L−1, respectively. MB removal followed the pseudo-second-order kinetics model and the process efficiency dropped by 38% as MB concentration increased from 5 to 20 mg L−1. Radical trapping tests revealed the significant role of $${\mathrm{OH}}^{.}$$ OH . and electron radicals as the major participants in dye degradation. A significant loss in the efficiency of M-MIL-101(Fe) was observed in the reusability tests that is good to study further. In conclusion, a simple thermal post-synthesis modification on MIL-101(Fe) improved its structural, catalytic, and adsorptive properties against MB.

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“…Owing to its persistence and bioaccumulation, TC can transfer along the biological chain and then produce drug-resistant bacteria, which seriously jeopardize human health and aquatic ecosystem. The removal of TC from wastewater is crucial. , …”

Section: Introductionmentioning

confidence: 99%

“…The removal of TC from wastewater is crucial. 24,25 In this work, the g-C 3 N 4 homojunction (HCCN) was generated through introducing the cyano groups, which was used to catalyze the Fenton-like reaction for the TC degradation. The catalytic activity of HCCN was significantly enhanced compared with those of g-C 3 N 4 (CN) and crystalline carbon nitride (HCN) under the same conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

Singlet Oxygen Formation Mechanism for the H₂O₂-Based Fenton-like Reaction Catalyzed by the Carbon Nitride Homojunction

Jiang,

Meng,

Nan

2024

Inorg. Chem.

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The singlet oxygen ( 1 O 2 ) oxidation process activated by metal-free catalysts has recently attracted considerable attention for organic pollutant degradation; however, the 1 O 2 formation remains controversial. Simultaneously, the catalytic activity of the metal-free catalyst limits the practical application. In this study, carbon nitride (HCCN) containing an intramolecular homojunction, a kind of metal-free catalyst, exhibits excellent activity compared to g-C 3 N 4 (CN) and crystalline carbon nitride (HCN) for tetracycline hydrochloride degradation through the H 2 O 2 -based Fenton-like reaction. The rate constant for HCCN increased about 16.1 and 8.9 times than that of CN and HCN, respectively. The activity of HCCN was enhanced, and the dominant reactive oxygen species (ROS) changed from hydroxyl radicals ( • OH) to 1 O 2 with an increase in pH from 4.5 to 11.5. A novel formation pathway of 1 O 2 was revealed. This result is different from the normal reference, in which • OH is always the primary ROS in the H 2 O 2 -based Fenton-like reaction. This study may provide a possible strategy for the investigation on the nonradical oxidation process in the Fenton-like reaction.

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A novel nitrogenous core-shell MIL-101(Fe)-based nanocomposite for enhanced adsorption and photo-degradation of organic pollutant under visible light

Cited by 19 publications

References 65 publications

Tuning Band Gap in Fe-Doped g-C₃N₄by Zn for Enhanced Fenton-Like Catalytic Performance

Tuning Band Gap in Fe-Doped g-C₃N₄by Zn for Enhanced Fenton-Like Catalytic Performance

Boosting the adsorptive and photocatalytic performance of MIL-101(Fe) against methylene blue dye through a thermal post-synthesis modification

Singlet Oxygen Formation Mechanism for the H₂O₂-Based Fenton-like Reaction Catalyzed by the Carbon Nitride Homojunction

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A novel nitrogenous core-shell MIL-101(Fe)-based nanocomposite for enhanced adsorption and photo-degradation of organic pollutant under visible light

Cited by 19 publications

References 65 publications

Tuning Band Gap in Fe-Doped g-C3N4by Zn for Enhanced Fenton-Like Catalytic Performance

Tuning Band Gap in Fe-Doped g-C3N4by Zn for Enhanced Fenton-Like Catalytic Performance

Boosting the adsorptive and photocatalytic performance of MIL-101(Fe) against methylene blue dye through a thermal post-synthesis modification

Singlet Oxygen Formation Mechanism for the H2O2-Based Fenton-like Reaction Catalyzed by the Carbon Nitride Homojunction

Contact Info

Product

Resources

About

Tuning Band Gap in Fe-Doped g-C₃N₄by Zn for Enhanced Fenton-Like Catalytic Performance

Tuning Band Gap in Fe-Doped g-C₃N₄by Zn for Enhanced Fenton-Like Catalytic Performance

Singlet Oxygen Formation Mechanism for the H₂O₂-Based Fenton-like Reaction Catalyzed by the Carbon Nitride Homojunction