Mxene-modulated dual-heterojunction generation on a metal-organic framework (MOF) via surface constitution reconstruction for enhanced photocatalytic activity

Wu, You; Li, Xiaoming; Yang, Qi; Wang, Dongbo; Yao, Fubing; Cao, Jian; Chen, Zhuo; Huang, Xiaoding; Yang, Yang; Li, Xiaopei

doi:10.1016/j.cej.2020.124519

Cited by 147 publications

(42 citation statements)

References 55 publications

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“…In Figure 2f, functional groups in BC and MBC were shown below: The stretching vibration band of hydroxyl groups (-OH) in carboxylic and phenolic related to MBC at 2983 cm −1 [32]. The absorption peak at 1575 cm −1 could be ascribed to the combined effect of C=O and aromatic C=C bonds.…”

Section: Ftir Analysismentioning

confidence: 97%

Adsorption and Fenton-like Degradation of Ciprofloxacin Using Corncob Biochar-Based Magnetic Iron–Copper Bimetallic Nanomaterial in Aqueous Solutions

Liu

et al. 2022

Nanomaterials

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An economical corncob biochar-based magnetic iron–copper bimetallic nanomaterial (marked as MBC) was successfully synthesized and optimized through a co-precipitation and pyrolysis method. It was successfully used to activate H2O2 to remove ciprofloxacin (CIP) from aqueous solutions. This material had high catalytic activity and structural stability. Additionally, it had good magnetic properties, which can be easily separated from solutions. In MBC/H2O2, the removal efficiency of CIP was 93.6% within 360 min at optimal reaction conditions. The conversion of total organic carbon (TOC) reached 51.0% under the same situation. The desorption experiments concluded that adsorption and catalytic oxidation accounted for 34% and 66% on the removal efficiency of CIP, respectively. The influences of several reaction parameters were systematically evaluated on the catalytic activity of MBC. OH was proved to play a significant role in the removal of CIP through electron paramagnetic resonance (EPR) analysis and a free radical quenching experiment. Additionally, such outstanding removal efficiency can be attributed to the excellent electronic conductivity of MBC, as well as the redox cycle reaction between iron and copper ions, which achieved the continuous generation of hydroxyl radicals. Integrating HPLC-MS, ion chromatography and density functional theory (DFT) calculation results, and possible degradation of the pathways of the removal of CIP were also thoroughly discussed. These results provided a theoretical basis and technical support for the removal of CIP in water.

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Section: Ftir Analysismentioning

confidence: 97%

Adsorption and Fenton-like Degradation of Ciprofloxacin Using Corncob Biochar-Based Magnetic Iron–Copper Bimetallic Nanomaterial in Aqueous Solutions

Liu

et al. 2022

Nanomaterials

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“…The photocatalytic production of H 2 O 2 and degradation of tetracycline hydrochloride (TC-HCl) was achieved by Wu and co-workers by the fabrication of a series of NH 2 -MIL-125(Ti) MOF and Ti 3 C 2 MXene-based hybrids labeled as MT x (x = 0− 5). 164 Among all the fabricated hybrids, MT5 exhibited maximum efficiency (82.80% in 1 h for the degradation of TC-HCl). This was attributed to the formation of dual heterojunctions in MT5 that were also responsible for facilitating the charge separation with subsequent transfer.…”

Section: Applications Of Mxene@mof Materialsmentioning

confidence: 99%

“…(h) Photocatalytic H 2 O 2 formation yield by using different samples. (i) H 2 O 2 production yield of MT5 for verifying different pathways of reaction under different environments Reproduced with permission from ref . Copyright 2020 Elsevier.…”

Section: Applications Of Mxene@mof Materialsmentioning

confidence: 99%

Emerging MXene@Metal–Organic Framework Hybrids: Design Strategies toward Versatile Applications

et al. 2021

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“…In order to improve their activity, several approaches have been proposed: (i) optimization of preparation method; 19 (ii) depositing a noble metal co-catalyst; 20 (iii) modification of ligands with organic groups, such as -NH 2 , -OH, or -(SH) 2 ; 21 (iv) creation of heterojunctions. 22,23 It is believed that the concept of a heterojunction architecture is the most promising approach to increasing the efficiency and stability of various photocatalysts by facilitating an improved photogenerated charge separation and transfer. 24,25 Given the recent surge of activity in the field of MOF-based heterojunction photocatalysts for the degradation of organic pollutants, an updated review is urgently needed.…”

Section: Introductionmentioning

confidence: 99%

“…The main problem with using the pristine MOFs as photocatalysts is the rapid recombination of photogenerated electron–hole pairs, which leads to a relatively low photocatalytic activity. In order to improve their activity, several approaches have been proposed: (i) optimization of preparation method; 19 (ii) depositing a noble metal co‐catalyst; 20 (iii) modification of ligands with organic groups, such as –NH 2 , –OH, or –(SH) 2 ; 21 (iv) creation of heterojunctions 22,23 . It is believed that the concept of a heterojunction architecture is the most promising approach to increasing the efficiency and stability of various photocatalysts by facilitating an improved photogenerated charge separation and transfer 24,25 …”

Section: Introductionmentioning

confidence: 99%

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

Belousov

Fukina

Koryagin

2022

J of Chemical Tech & Biotech

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Heterogeneous photocatalysis has been considered one of the most attractive alternative routes to transforming naturally abundant, clean, and sustainable solar energy into chemical energy. Nowadays, the most popular heterogeneous photocatalyst, titanium dioxide, has already found applications for water splitting to produce hydrogen and oxygen, for the degradation of organic pollutants, for air purification, and for the creation of self‐cleaning coatings. However, TiO2 has a significant limitation: a large band gap (3.0–3.4 eV) that makes it impossible to use anything other than ultraviolet illumination to initiate photocatalytic processes. With a focus on efficient solar‐energy utilization, the development of new photocatalysts that are sensitive to visible light is an important direction in the theory and practice of heterogeneous photocatalysis. In this regard, the use of metal–organic frameworks (MOFs) is an attractive route; they have emerged as an interesting class of materials for applications in photoreactions due to their flexible tunability in composition, structure, and functional properties, along with their facilitated adsorption towards chemicals and their efficient light absorption. Moreover, they can be composed with other semiconductors to produce heterojunctions (e.g., type‐II, Z‐scheme, and S‐scheme), whose effectiveness in photogenerated charge separation has already been proven by many examples. The present critical review reports progress over the last 5 years in the preparation and activity of metal–organic framework‐based heterojunction photocatalysts for the degradation of organic pollutants. © 2022 Society of Chemical Industry (SCI).

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Mxene-modulated dual-heterojunction generation on a metal-organic framework (MOF) via surface constitution reconstruction for enhanced photocatalytic activity

Cited by 147 publications

References 55 publications

Adsorption and Fenton-like Degradation of Ciprofloxacin Using Corncob Biochar-Based Magnetic Iron–Copper Bimetallic Nanomaterial in Aqueous Solutions

Adsorption and Fenton-like Degradation of Ciprofloxacin Using Corncob Biochar-Based Magnetic Iron–Copper Bimetallic Nanomaterial in Aqueous Solutions

Emerging MXene@Metal–Organic Framework Hybrids: Design Strategies toward Versatile Applications

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

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