High-efficiency pollutant degradation, disinfection and H2O2 production activities of magnetically separable Co-imbedded N-doped carbonaceous framework/supramolecular perylene diimide photocatalyst

Ning, Lufang; Chen, Xue; Wang, Zhouping; Xu, Jing

doi:10.1016/j.apcatb.2022.122282

Cited by 26 publications

(4 citation statements)

References 53 publications

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“…[18] Accordingly, the relative peak intensity ratio (I 1/2 ) can also reflect the degree of 𝜋-𝜋 interaction. [23] The I 1/2 of 8%PTCDA/PTA is 1.96, which is significantly higher than that of PTA (1.57), indicating that PTCDA promotes the degree of 𝜋-𝜋 stacking, [24] which is consistent with the tendency of FT-IR results.…”

Section: Structural Characterizations Of Photocatalystsupporting

confidence: 78%

Molecule Dipole and Steric Hindrance Engineering to Modulate Electronic Structure of PTCDA/PTA for Highly Efficient Photocatalytic Hydrogen Evolution and Antibiotics Degradation

Yu,

Fang,

Wang

et al. 2023

Adv Funct Materials

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Insufficient charge separation and slow exciton transport severely limit the utilization of perylene‐plane‐based organic photocatalysts. Herein, a novel PTCDA/PTA (perylene‐3,4,9,10‐tetracarboxylic dianhydride/perylenetetracarboxylic acid) is successfully prepared for the first time by the in situ crystallization of PTA on the surface of PTCDA through π–π interaction. The PTCDA/PTA loading with 8%PTCDA showed the optimum photocatalytic performance. The photocatalytic H2 evolution rate reached 45.06 mmol g−1 h−1, which is 1.93‐fold and 4506.00‐fold higher than that of pure PTA and PTCDA. Meanwhile, it also exhibited excellent antibiotics photodegradation activities, in which both the removal efficiency of tetracycline hydrochloride (TC‐HCl) and ofloxacin (OFL) are more over 90% within 30 min. By modulating the structures of perylene plane, the steric hindrance and internal dipole moments can be precisely tuned. These lead to the change of stacking mode, promoting the degree of π–π stacking and formation of strong internal electric field, while improved the photocatalytic activity. Excited state density functional theory (DFT) calculations unveil the redistribution of electron‐hole pairs, which obeys a type II mechanism. The proposed photocatalytic mechanism is determined by liquid chromatography‐mass spectrometry (LC‐MS). Besides, the toxicities of the degradation products are also evaluated. The work provides useful strategy for the design of high‐performance and multifunctional photocatalysts toward water remediation and energy production.

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Section: Structural Characterizations Of Photocatalystsupporting

confidence: 78%

Molecule Dipole and Steric Hindrance Engineering to Modulate Electronic Structure of PTCDA/PTA for Highly Efficient Photocatalytic Hydrogen Evolution and Antibiotics Degradation

Yu,

Fang,

Wang

et al. 2023

Adv Funct Materials

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“…[6] Reactive oxygen species (ROS), such as superoxide radical (O 2 *À ), hydroxyl radical ( * OH), and others, exhibit potent oxidizing capabilities during the photodegradation of pollu-tants, accelerating the breakdown of contaminating substances. [7] These ROS represent the most common free radicals generated through photolysis. The types of photogenerated radicals have evolved with the introduction of photocatalysis into organic chemistry, depending on the functional groups of organic molecules involved, including alkyl radicals ( * R), halogen radicals ( * X), and cyano radicals ( * CN).…”

Section: Introductionmentioning

confidence: 99%

Unravelling the Role of Free Radicals in Photocatalysis

Chen,

Xu,

Fang Wen

et al. 2024

Chemistry A European J

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Free radicals are increasingly recognized as active intermediate reactive species that can participate in various redox processes, significantly influencing the mechanistic pathways of reactions. Numerous researchers have investigated the generation of one or more distinct photogenerated radicals, proposing various hypotheses to explain the reaction mechanisms. Notably, recent research has demonstrated the emergence of photogenerated radicals in innovative processes, including organic chemical reactions and the photocatalytic dissolution of precious metals. To harness the potential of these free radicals more effectively, it is imperative to consolidate and analyze the processes and action modes of these photogenerated radicals. This conceptual paper delves into the latest advancements in understanding the mechanics of photogenerated radicals.

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“…The photocatalyst was used for the environmentally friendly removal of organic contaminants. Xu et al [17] developed a 3D/1D heterostructure using supramolecular perylene diimide as the 1D material. The photocatalyst performed well on disinfection, pollutant degradation, and H 2 O 2 production.…”

Section: Introductionmentioning

confidence: 99%

A High Crystalline Perylene-Based Hydrogen-Bonded Organic Framework for Enhanced Photocatalytic H2O2 Evolution

Hu,

Wu,

Feng

et al. 2023

Molecules

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Hydrogen-bonded organic frameworks (HOFs) are a kind of crystalline porous material that have shown great potential for photocatalysis on account of their mild synthesis conditions and high crystallinity. Perylene-based photocatalysts have great potential for photocatalytic H2O2 production due to their excellent photochemical stability and broad spectral absorption. In this work, we designed and synthesized a high crystalline perylene-based HOF (PTBA) and an amorphous analog sample PTPA for photocatalytic H2O2 evolution. Under visible light irradiation, PTBA shows a higher photocatalytic H2O2 production rate of 2699 μmol g−1 h−1 than PTPA (2176 μmol g−1 h−1) and an apparent quantum yield (AQY) of 2.96% at 500 nm. The enhanced photocatalytic performance of PTBA is attributed to the promotion of the separation and transfer of photocarriers due to its high crystallinity. This work provides a precedent for the application of HOFs in the field of photocatalytic H2O2 generation.

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High-efficiency pollutant degradation, disinfection and H2O2 production activities of magnetically separable Co-imbedded N-doped carbonaceous framework/supramolecular perylene diimide photocatalyst

Cited by 26 publications

References 53 publications

Molecule Dipole and Steric Hindrance Engineering to Modulate Electronic Structure of PTCDA/PTA for Highly Efficient Photocatalytic Hydrogen Evolution and Antibiotics Degradation

Molecule Dipole and Steric Hindrance Engineering to Modulate Electronic Structure of PTCDA/PTA for Highly Efficient Photocatalytic Hydrogen Evolution and Antibiotics Degradation

Unravelling the Role of Free Radicals in Photocatalysis

A High Crystalline Perylene-Based Hydrogen-Bonded Organic Framework for Enhanced Photocatalytic H2O2 Evolution

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