Facilitation of the visible light-induced Fenton-like excitation of H2O2 via heterojunction of g-C3N4/NH2-Iron terephthalate metal-organic framework for MB degradation

Li, Xiyi; Pi, Yunhong; Wu, Liqiong; Xia, Qibin; Wu, Junliang; Li, Zhong; Xiao, Jing

doi:10.1016/j.apcatb.2016.09.073

Cited by 338 publications

(82 citation statements)

References 65 publications

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“…The edge of BUC‐21 in the composites became rough after the introduction of g‐C 3 N 4 , which resulted from the interaction between g‐C 3 N 4 and BUC‐21. But the HRTEM image (Figure S2) was not attainable as g‐C 3 N 4 and BUC‐21 were solids with low crystalline quality, which was similar to g‐C 3 N 4 /MIL‐53(Fe), g‐C 3 N 4 /NH 2 ‐MIL‐88B(Fe) and g‐C 3 N 4 /UiO‐66 . And the nitrogen adsorption experiments demonstrated that the BET surface area increased from 1.06 m 2 g −1 for BUC‐21 to 11.65 m 2 g −1 for B100G100 as presented in Table , which further confirmed the successful combination between g‐C 3 N 4 and BUC‐21.…”

Section: Resultsmentioning

confidence: 99%

Facile fabrication of BUC‐21/g‐C₃N₄ composites and their enhanced photocatalytic Cr(VI) reduction performances under simulated sunlight

Wang

et al. 2018

Applied Organom Chemis

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A series of BUC-21/g-C 3 N 4 composites were facilely fabricated from twodimensional metal-organic framework BUC-21 and two-dimensional metal-free polymer semiconductor graphitic carbon nitride (g-C 3 N 4 ) through ball-milling, and characterized via powder X-ray diffraction, Fourier transform infrared spectrometry, thermogravimetric analysis, transmission electron microscopy, and UV-visible diffuse reflectance, X-ray photoelectron and photoluminescence emission spectrometry. The photocatalytic activities of B100G100 (weight ratio of BUC-21 to g-C 3 N 4 being 1:1) towards Cr(VI) reduction were investigated upon the irradiation of simulated sunlight and real sunlight, in which the influences of various organic compounds (tartaric acid, citric acid and oxalic acid) as hole scavengers, pH values (2, 3, 4, 5, 6, 7 and 8) and foreign ions (ions in tap water and real surface water) were also investigated. The results revealed that B100G100 exhibited more outstanding photocatalytic Cr(VI) reduction than individual BUC-21 and g-C 3 N 4 , resulting from enhanced separation of photogenerated electrons and holes, which were confirmed via both photoluminescence emission and electrochemical determination. The B100G100 composite exhibited good reusability and stability after several experimental runs. Also, the corresponding mechanism of photocatalytic reaction was proposed.

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Section: Resultsmentioning

confidence: 99%

Facile fabrication of BUC‐21/g‐C₃N₄ composites and their enhanced photocatalytic Cr(VI) reduction performances under simulated sunlight

Wang

et al. 2018

Applied Organom Chemis

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“…This hypothesis seems to be consistent with the assignment of the luminescence peak at 525 nm of CuTz‐1, which is attributed to a 3 MLCT excited state. Although a widely accepted viewpoint is that the organic linker is regarded as the VB and the metallic cluster plays the role of CB for MOF‐based semiconductors, for the present case the situation is probably reversed: Cu ions or Cu 5 tz 6 clusters possibly act as the VB, while triazole ligands act as the CB. For those already extensively studied MOF‐based semiconductors, the metal ions are either in their higher valence (e.g., Fe III in MIL‐53(Fe), Zr IV in UiO‐66) or in a very stable valence (e.g., Zn II in MOF‐5), and therefore it is very difficult for these metal ions to lose electrons.…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Photocatalytic Degradation of Dyes by a Copper–Triazolate Metal–Organic Framework

Liu

Zhang

Wang

et al. 2018

Chemistry A European J

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A copper(I) 3,5-diphenyltriazolate metal-organic framework (CuTz-1) was synthesized and extensively characterized by using a multi-technique approach. The combined results provided solid evidence that CuTz-1 features an unprecedented Cu tz cluster as the secondary building unit (SBU) with channels approximately 8.3 Å in diameter. This metal-organic framework (MOF) material, which is both thermally and chemically (basic and acidic) stable, exhibited semiconductivity and high photocatalytic activity towards the degradation of dyes in the presence of H O . Its catalytic performance was superior to that of reported MOFs and comparable to some composites, which has been attributed to its high efficiency in generating OH, the most active species for the degradation of dyes. It is suggested that the photogenerated holes are trapped by Cu , which yields Cu , the latter of which behaves as a catalyst for a Fenton-like reaction to produce an excess amount of OH in addition to that formed through the scavenging of photogenerated electrons by H O . Furthermore, it was shown that a dye mixture (methyl orange, methyl blue, methylene blue, and rhodamine B) could be totally decolorized by using CuTz-1 as a photocatalyst in the presence of H O under the irradiation of a Xe lamp or natural sunlight.

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“…As a class of clean and promising photocatalytic materials, graphitic carbon nitrogen (g‐C 3 N 4 ) stands out among the available semiconductors owing to its well‐known metal‐free nature, high stability, visible‐light absorption, easy preparation via cheap materials and so on ,. It has a broad range of potential applications in the fields of photocatalytic degradation of organic pollutants,, CO 2 reduction,, and energy conversion . Nevertheless, the pristine g‐C 3 N 4 suffers from main weakness of regarding of its low surface area, poor response to visible light and massive photoinduced charge carriers’ recombination, which depresses the photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Tubular g‐C₃N₄ with N‐Defects and Extended π‐Conjugated System for Promoted Photocatalytic Hydrogen Production

Shan

Zhao

2019

ChemCatChem

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Semiconductor photocatalytic hydrogen evolution from water splitting using solar energy is one of the most potential strategies for settling the energy crisis, but a bottleneck is occurred in developing a highly efficient photocatalyst. Herein, we successfully fabricated a tubular g-C 3 N 4 with nitrogen defects (including both nitrogen vacancies and cyano groups) and extended π-conjugated system, wherein the nitrogen defects and extended π-conjugated system were conveniently introduced during thermal polymerization of the pyridinium alkaline ionic liquid-modified hydrogen-bonding melaminecyanuric acid supramolecular (PHMCS) pre-aggregates towards carbon nitride with hexagonal cylinder morphology formed by the pyridinium alkaline ionic liquid-assisted hydrothermal process of low-cost melamine, in which the added trace pyridinium alkaline ionic liquid serves as an all-rounder with three roles including the promoting agent towards the transformation of melamine to cyanuric acid for constructing PHMCS, nitrogen defects making agent, and the electronictuning agent regarding of the as-formed carbon nitride. The tubular structure enhances the light scattering and improves the accessibility of active sites. Meanwhile, the high charge transfer efficiency, broad optical absorption region, and suitable energy band positions are related to both the introduction of nitrogen defects by alkali of ionic liquid and the extended πelectron delocalization in the conjunction carbon nitride networks. As a consequence, the resulted carbon nitride using optimized amount of pyridinium alkaline ionic liquid (AIL-2.0-CN) photocatalyst exhibited a high hydrogen evolution rate of 1284 μmol h À 1 g À 1 (λ > 420 nm) with an apparent quantum efficiency of 4.2 % at 420 nm, which is 13.6 times higher than that of bulk g-C 3 N 4 (BÀ CN), and even 3.5 folds much higher than the one (SHPYÀ CN) prepared by the similar process to that for AIL-2.0-CN except for the replacement of pyridinium alkaline ionic liquid by a mixture containing a corresponding amount of pyridine and sodium hydroxide, suggesting the promoting effect resulting from the unique characteristic of pyridinium alkaline ionic liquid. Based on the unique physicochemical properties and the molecules-adjustability, the developed alkaline ionic liquid assisted strategy can open an avenue for designing and preparing excellent g-C 3 N 4 based photocatalysts with tunable geometric and electronic structures for solar hydrogen production.[a] X.

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Facilitation of the visible light-induced Fenton-like excitation of H2O2 via heterojunction of g-C3N4/NH2-Iron terephthalate metal-organic framework for MB degradation

Cited by 338 publications

References 65 publications

Facile fabrication of BUC‐21/g‐C₃N₄ composites and their enhanced photocatalytic Cr(VI) reduction performances under simulated sunlight

Facile fabrication of BUC‐21/g‐C₃N₄ composites and their enhanced photocatalytic Cr(VI) reduction performances under simulated sunlight

Highly Efficient Photocatalytic Degradation of Dyes by a Copper–Triazolate Metal–Organic Framework

Fabrication of Tubular g‐C₃N₄ with N‐Defects and Extended π‐Conjugated System for Promoted Photocatalytic Hydrogen Production

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Facilitation of the visible light-induced Fenton-like excitation of H2O2 via heterojunction of g-C3N4/NH2-Iron terephthalate metal-organic framework for MB degradation

Cited by 338 publications

References 65 publications

Facile fabrication of BUC‐21/g‐C3N4 composites and their enhanced photocatalytic Cr(VI) reduction performances under simulated sunlight

Facile fabrication of BUC‐21/g‐C3N4 composites and their enhanced photocatalytic Cr(VI) reduction performances under simulated sunlight

Highly Efficient Photocatalytic Degradation of Dyes by a Copper–Triazolate Metal–Organic Framework

Fabrication of Tubular g‐C3N4 with N‐Defects and Extended π‐Conjugated System for Promoted Photocatalytic Hydrogen Production

Contact Info

Product

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Facile fabrication of BUC‐21/g‐C₃N₄ composites and their enhanced photocatalytic Cr(VI) reduction performances under simulated sunlight

Facile fabrication of BUC‐21/g‐C₃N₄ composites and their enhanced photocatalytic Cr(VI) reduction performances under simulated sunlight

Fabrication of Tubular g‐C₃N₄ with N‐Defects and Extended π‐Conjugated System for Promoted Photocatalytic Hydrogen Production