A novel UiO-66-NH2/Bi2WO6 composite with enhanced pollutant photodegradation through interface charge transfer

Tan, Yawen; Deng, Yuehong; Tang, Haiqin; Zou, Hao; Xu, Yifeng; Li, Jiaxin

doi:10.1016/j.colsurfa.2021.126699

Cited by 32 publications

(13 citation statements)

References 26 publications

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“…This result revealed that the introduction of Bi NPs to PCN-222 led to an increase in the electron density of Zr clusters, proving the charge transfer from Bi NPs to the MOF. 48,49 In the C 1s spectrum, the binding energies of O− C�O, C−O, C−N, and C−C functional groups were 288.8, 286.4, 285.2, and 284.4 eV, respectively (Figure S3A). 50 Figure S3B shows two peaks at binding energies of 399.8 and 397.6 eV in the XPS spectrum of N 1s.…”

Section: Resultsmentioning

confidence: 99%

Self-Driven Electron Transfer Biomimetic Enzymatic Catalysis of Bismuth-Doped PCN-222 MOF for Rapid Therapy of Bacteria-Infected Wounds

Luo

Wang

et al. 2023

ACS Nano

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In this work, a biomimetic nanozyme catalyst with rapid and efficient self-bacteria-killing and wound-healing performances was synthesized. Through an in situ reduction reaction, a PCN-222 metal organic framework (MOF) was doped with bismuth nanoparticles (Bi NPs) to form Bi-PCN-222, an interfacial Schottky heterojunction biomimetic nanozyme catalyst, which can kill 99.9% of Staphylococcus aureus (S. aureus). The underlying mechanism was that Bi NP doping can endow Bi-PCN-222 MOF with self-driven charge transfer through the Schottky interface and the capability of oxidaselike and peroxidase-like activity, because a large number of free electrons can be captured by surrounding oxygen species to produce radical oxygen species (ROS). Furthermore, once bacteria contact Bi-PCN-222 in a physiological environment, its appropriate redox potential can trigger electron transfer through the electron transport pathway in bacterial membranes and then the interior of the bacteria, which disturbs the bacterial respiration process and subsequent metabolism. Additionally, Bi-PCN-222 can also accelerate tissue regeneration by upregulating fibroblast proliferation and angiogenesis genes (bFGF, VEGF, and HIF-1α), thereby promoting wound healing. This biomimetic enzyme-catalyzed strategy will bring enlightenment to the design of self-bacterial agents for efficient disinfection and tissue reconstruction simultaneously.

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Section: Resultsmentioning

confidence: 99%

Self-Driven Electron Transfer Biomimetic Enzymatic Catalysis of Bismuth-Doped PCN-222 MOF for Rapid Therapy of Bacteria-Infected Wounds

Luo

Wang

et al. 2023

ACS Nano

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“…36,37 The valence band (VB) potentials of H-TiO 2 and Bi 2 WO 6 were calculated to be 2.22 and 1.76 V, respectively, by using the equation E VB = E CB + E g . 36,38 According to the test described above and calculation results, the energy band structure diagram of H-TiO 2 and Bi 2 WO 6 is shown in Figure 3e. Notably, the reduction potential of CO is −0.53 V, 13,39 indicating that the conversion of CO 2 into CO by H-TiO 2 and Bi 2 WO 6 is thermodynamically feasible.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

Hierarchical Hollow TiO₂@Bi₂WO₆ with Light-Driven Excited Bi^(3–x)+ Sites for Efficient Photothermal Catalytic CO₂ Reduction

Liu,

Yu,

Liu

et al. 2024

Inorg. Chem.

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Converting CO 2 into valuable chemicals via sustainable energy sources is indispensable for human development. Photothermal catalysis combines the high selectivity of photocatalysis and the high yield of thermal catalysis, which is promising for CO 2 reduction. However, the present photothermal catalysts suffer from low activity due to their poor light absorption ability and fast recombination of photogenerated electrons and holes. Here, a TiO 2 @Bi 2 WO 6 heterojunction photocatalyst featuring a hierarchical hollow structure was prepared by an in situ growth method. The visible light absorption and photothermal effect of the TiO 2 @Bi 2 WO 6 photocatalyst is promoted by a hierarchical hollow structure, while the recombination phenomenon is significantly mitigated due to the construction of the heterojunction interface and the existence of excited Bi (3−x)+ sites. Such a catalyst exhibits excellent photothermal performance with a CO yield of 43.7 μmol h −1 g −1 , which is 15 and 4.7 times higher than that of pure Bi 2 WO 6 and that of physically mixed TiO 2 /Bi 2 WO 6 , respectively. An in situ study shows that the pathway for the transformation of CO 2 into CO over our TiO 2 @Bi 2 WO 6 proceeds via two important intermediates, including COO − and COOH − . Our work provides a new idea of excited states for the design and synthesis of highly efficient photothermal catalysts for CO 2 conversion.

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“…The main disadvantages of g‐C 3 N 4 are the limited electron migration rate caused by poor conductivity and the fewer active sites owing to the low specific surface area and poor hydrophilicity; these drawbacks make it necessary to explore other materials to obtain MOF‐based type‐II heterojunctions, such as metal oxides, chalcogenides, and perovskites (TiO 2 , 53,145 CdS, 146 WO 3 , 147,148 Bi 2 WO 6 ) 54,149,150 . The photocatalytic activity of these heterojunctions is comparable to that of the MOF@g‐C 3 N 4 composites.…”

Section: Mof‐based Heterojunctions As Photocatalysts For the Degradat...mentioning

confidence: 99%

“…The difference in mechanism may be in the direction of charge transfer. For instance, recent studies have shown that type‐II heterojunctions NH 2 ‐UiO‐66/Bi 2 WO 6 , 149 BiVO 4 /MIL‐101(Cr), 154 and Bi 2 MoO 6 /MIL‐125(Ti) 155 are able to degrade RhB in an aqueous solution. However, the charge transfer mechanism (which is determined by the CB and VB energies of the components) in NH 2 ‐UiO‐66/Bi 2 WO 6 , BiVO 4 /MIL‐101(Cr), and Bi 2 MoO 6 /MIL‐125(Ti) composites is different from that observed for MIL‐88A(Fe)/Bi 2 WO 6 54 .…”

Section: Mof‐based Heterojunctions As Photocatalysts For the Degradat...mentioning

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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A novel UiO-66-NH2/Bi2WO6 composite with enhanced pollutant photodegradation through interface charge transfer

Cited by 32 publications

References 26 publications

Self-Driven Electron Transfer Biomimetic Enzymatic Catalysis of Bismuth-Doped PCN-222 MOF for Rapid Therapy of Bacteria-Infected Wounds

Self-Driven Electron Transfer Biomimetic Enzymatic Catalysis of Bismuth-Doped PCN-222 MOF for Rapid Therapy of Bacteria-Infected Wounds

Hierarchical Hollow TiO₂@Bi₂WO₆ with Light-Driven Excited Bi^(3–x)+ Sites for Efficient Photothermal Catalytic CO₂ Reduction

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

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A novel UiO-66-NH2/Bi2WO6 composite with enhanced pollutant photodegradation through interface charge transfer

Cited by 32 publications

References 26 publications

Self-Driven Electron Transfer Biomimetic Enzymatic Catalysis of Bismuth-Doped PCN-222 MOF for Rapid Therapy of Bacteria-Infected Wounds

Self-Driven Electron Transfer Biomimetic Enzymatic Catalysis of Bismuth-Doped PCN-222 MOF for Rapid Therapy of Bacteria-Infected Wounds

Hierarchical Hollow TiO2@Bi2WO6 with Light-Driven Excited Bi(3–x)+ Sites for Efficient Photothermal Catalytic CO2 Reduction

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

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Hierarchical Hollow TiO₂@Bi₂WO₆ with Light-Driven Excited Bi^(3–x)+ Sites for Efficient Photothermal Catalytic CO₂ Reduction