Photocatalytic uranium removal from basic effluent by porphyrin-Ni COF as the photocatalyst

Chen, Lang; Hang, Jiahui; Chen, Bin; Kang, Jinyang; Yan, Zijun; Wang, Zining; Zhang, Yun; Chen, Shanyong; Wang, Yuanhua; Jin, Yongdong; Xia, Chuanqin

doi:10.1016/j.cej.2022.140378

Cited by 41 publications

(8 citation statements)

References 41 publications

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“…Moreover, the final product of photocatalytic uranium extraction is mainly adsorbed on the surface of the catalyst, hence the type of product U species can be identified by various characterization methods, such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and X-ray absorption near edge structure (XANES) [ 29 ]. For instance, Chen et al [ 83 ] use TT-POR COF-Ni as a photocatalyst to remove uranium ( Figure 2 A). After photocatalytic reaction, the form of uranium was characterized by XPS, FT-IR, and PXRD.…”

Section: Mechanism Of Photocatalytic Uranium Reduction and Identifica...mentioning

confidence: 99%

Advanced Photocatalytic Uranium Extraction Strategies: Progress, Challenges, and Prospects

Zhu

Wang

et al. 2023

Nanomaterials

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Nuclear energy with low carbon emission and high-energy density is considered as one of the most promising future energy sources for human beings. However, the use of nuclear energy will inevitably lead to the discharge of nuclear waste and the consumption of uranium resources. Therefore, the development of simple, efficient, and economical uranium extraction methods is of great significance for the sustainable development of nuclear energy and the restoration of the ecological environment. Photocatalytic U(VI) extraction technology as a simple, highly efficient, and low-cost strategy, received increasing attention from researchers. In this review, the development background of photocatalytic U(VI) extraction and several photocatalytic U(VI) reduction mechanisms are briefly described and the identification methods of uranium species after photocatalytic reduction are addressed. Subsequently, the modification strategies of several catalysts used for U(VI) extraction are summarized and the advantages and disadvantages of photocatalytic U(VI) extraction are compared. Additionally, the research progress of photocatalytic technology for U(VI) extraction in actual uranium-containing wastewater and seawater are evaluated. Finally, the current challenges and the developments of photocatalytic U(VI) extraction technology in the future are prospected.

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Section: Mechanism Of Photocatalytic Uranium Reduction and Identifica...mentioning

confidence: 99%

Advanced Photocatalytic Uranium Extraction Strategies: Progress, Challenges, and Prospects

Zhu

Wang

et al. 2023

Nanomaterials

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“…Covalent organic frameworks (COFs), , as well-defined and predictable networks of building blocks linked by covalent bonds in a periodic arrangement, have drawn special attention from scientists, which have been widely employed in lots of cutting-edge fields including molecule separation, − heterogeneous catalysis, − energy storage, − and optoelectronics. − Although the immobilization of various metal catalysts on COFs for efficient catalysis under batch conditions has been reported, − there are few examples of effective heterogeneous catalysis using COF materials as catalyst supports in continuous flow processes. Due to the superiority of accurate control over the frame structures and the types of functional groups to support the catalysts, we believe that the COFs with large specific surfaces also possess the potential to be used as packed bed fillers for efficient continuous catalysis.…”

Section: Introductionmentioning

confidence: 99%

Accelerated Diffusion of a Copper(I)-Functionalized COF Packed Bed Reactor for Efficient Continuous Flow Catalysis

Wang,

Xia,

Chen

et al. 2024

ACS Appl. Mater. Interfaces

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Flow chemistry provides a neo-orientation for the research and development of chemical technology, in which heterogeneous continuous catalysis based on packed beds can realize rapid separation and recycling. However, options for heterogeneous catalysts are still limited. In this work, we gradually grow covalent organic frameworks (COFs, TpBpy) on the surface of a silica gel (SiO 2 )-supported substrate to obtain a stable copper(I)-chelated high-loading heterogeneous catalyst (SiO 2 @CuI-TpBpy). SiO 2 @CuI-TpBpy shows high catalytic activity in three-component Huisgen 1,3-dipolar cycloaddition, giving the corresponding triazoles with excellent yields and reposeful recyclability under batch conditions. The structures of the catalysts remain steady, and the copper contents are basically unchanged after five cycles. Then, the catalysts are successfully applied for threecomponent heterogeneous catalysis in a one-pot continuous flow to prepare rufinamide in 89% yield for 24 h stably and efficiently with mere traces of copper ions remaining. More importantly, the catalytic system reveals a minuscule effect of catalyst particle size on internal diffusion. This COF encapsulation strategy presents a new possibility for the design of industrial heterogeneous catalysts with high metal loading and low internal diffusion resistance.

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“…For example, porphyrin covalent organic framework materials were constructed via an aldimine reaction with meso -substituted amino porphyrins and double-terminated aldehyde bridging groups. 18 The other mode involves employing different carriers to load porphyrins to form highly hybrid composites. 19–22 For instance, porphyrin derivatives containing different specific functional groups were loaded on metal oxides, biomass materials, and graphene materials as new porphyrin composite materials (Fig.…”

Section: Introductionmentioning

confidence: 99%

Carbonyl functionalization strategy to overcome easy agglomeration in porphyrin

Li,

Qiang

2024

J. Mater. Chem. C

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Photocatalytic uranium removal from basic effluent by porphyrin-Ni COF as the photocatalyst

Cited by 41 publications

References 41 publications

Advanced Photocatalytic Uranium Extraction Strategies: Progress, Challenges, and Prospects

Advanced Photocatalytic Uranium Extraction Strategies: Progress, Challenges, and Prospects

Accelerated Diffusion of a Copper(I)-Functionalized COF Packed Bed Reactor for Efficient Continuous Flow Catalysis

Carbonyl functionalization strategy to overcome easy agglomeration in porphyrin

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