COF-Based Composites: Extraordinary Removal Performance for Heavy Metals and Radionuclides from Aqueous Solutions

He, Gu; Liu, Xiaolu; Wang, Suhua; Chen, Zhongshan; Yang, Hui; Hu, Baowei; Shen, Changwei; Wang, Xiangke

doi:10.1007/s44169-022-00018-6

Cited by 62 publications

(45 citation statements)

References 114 publications

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“…Radioactive wastewater from the development of nuclear energy contains large amounts of dissolved hexavalent uranium [U(VI)]. − The dissolved U(VI) is highly mobile and can easily enter the ecosystem through aqueous medium and pose a potential hazard. − Fortunately, the conversion of highly soluble U(VI) to tetravalent uranium [U(IV)] with relatively low solubility by coupling adsorption with photocatalysis is considered an effective strategy to achieve a sustainable development of nuclear energy and environmental protection. − However, the large number of photogenerated electrons and holes that recombine during the photoreduction of U(VI) can severely inhibit the catalytic activity of the photocatalyst, leading to the scarcity of reported photocatalysts that exhibit excellent catalytic activity for high concentrations of U(VI). − Therefore, the design of a photocatalyst with effective spatial separation of carriers is of great practical importance for the efficient removal of U(VI).…”

Section: Introductionmentioning

confidence: 99%

Dual Charge-Transfer Channels Harmonize Carrier Separation for Efficient U(VI) Photoreduction

Zhang

Xiao

et al. 2023

Inorg. Chem.

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The low efficient transfer of photogenerated electrons to an active catalytic site is a pivotal problem for the photoreduction of highly soluble hexavalent uranium [U(VI)] to low soluble tetravalent uranium [U(IV)]. Herein, we successfully synthesized a TiO2–x /1T-MoS2/reduced graphene oxide heterojunction (T2–x TMR) with dual charge-transfer channels by exploiting the difference in Fermi levels between the heterojunction interfaces, which induced multilevel separation of photogenerated carriers. Theoretical and experimental results demonstrate that the presence of the electron buffer layer promoted the efficient migration of photogenerated electrons between the dual charge-transfer channels, which achieved effective separation of photogenerated carriers in physical/spatial dimensions and significantly extended the lifetime of photogenerated electrons. The migration of photogenerated electrons to the active catalytic site after multilevel spatial separation enabled the T2–x TMR dual co-photocatalyst to remove 97.4% of the high concentration of U(VI) from the liquid-phase system within 80 min. This work provides a practical reference for utilizing multiple co-catalysts to accomplish directed spatial separation of photogenerated carriers.

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Section: Introductionmentioning

confidence: 99%

Dual Charge-Transfer Channels Harmonize Carrier Separation for Efficient U(VI) Photoreduction

Zhang

Xiao

et al. 2023

Inorg. Chem.

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“…Several applications for COFs have been explored, including molecular separations [ 2 ], removal of toxic compounds [ 3 ], gas capture [ 4 ], enzyme immobilization [ 5 ], optoelectronic applications [ 6 ], analytical chemistry [ 7 ], photocatalysis [ 8 , 9 ], electrocatalysis [ 10 ], electrochemical sensors [ 11 ], batteries [ 12 ], and solar fuel production [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Microwave-Assisted Synthesis of COFs: 2020–2022

et al. 2023

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Covalent organic frameworks (COFs) have emerged as a new type of crystalline porous polymers of great interest. However, their preparation requires long reaction times. Microwave-assisted synthesis (MAS) offers an interesting approach to increasing the reaction rate of chemical processes. Thus, microwaves can be a key tool for the fast and scalable synthesis of COFs. Since our previous review on the topic, the preparation of COFs with microwaves has been evolving. Herein, we present a compilation of COFs studies and experiments published in the last three years on the synthesis of COFs using microwave-assisted synthesis as a source of energy. The articles include imine, triazine, and other 2D COFs synthesized using MAS. The 3D COFs have also been compiled. The chemical structure of the monomers and the COFs and their main parameters of synthesis and application are summarized for each article.

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“…Recently, the development of novel materials with tunable characteristics has received substantial attention from researchers to improve the strategies for water treatment and water quality monitoring. − Nanomaterials have emerged as promising options in environmental sensing and remediation applications by virtue of their unique physicochemical characteristics. Such materials are not limited to but include semiconductor quantum dots, metal and polymeric nanoparticles, nanocomposites, carbon nanotubes, and metal–organic framework nanoparticles. − The synthesis of novel nanostructures and a broad range of prospective applications have been made feasible by the remarkable advancements made with covalent organic frameworks (COFs) and metal–organic frameworks (MOFs). − The incorporation of functionalized nanomaterials with tailored properties can facilitate the attainment of higher levels of sensitivity, selectivity, and performance …”

Section: Introductionmentioning

confidence: 99%

MXenes and MXene-Based Materials for Removal and Detection of Water Contaminants: A Review

Gopalram

Kapoor

Kumar³

et al. 2023

Ind. Eng. Chem. Res.

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The disposal of multifarious contaminants in water resources poses a grave threat to the environment and health. Effective methods of treating and detecting these contaminants are crucial for ensuring access to clean and safe water. MXenes and MXene-derived materials have emerged as promising candidates for the design and development of novel techniques for water purification and sensing applications, by virtue of their unique characteristics. These nanomaterials offer highly versatile features such as amenability for surface functionalization, tunability of interlayer spacing, good electrical conductivity, favorable ion transport properties, and large specific surface area. Considering their immense potential, research on MXene-based technologies for combating the water pollution problem is still in its early phase. This review provides a critical overview and evaluation of the recent advances in MXenes and MXene-based composites for the remediation and detection of water contaminants. The progress in the application of MXene-based materials in water treatment techniques such as membrane separations, photocatalysis, and adsorption is summarized. The developments in MXene-based sensors relying on electrochemical, fluorescent, colorimetric, electrochemiluminescence, and surface plasmon resonance approaches for the detection of water pollutants are discussed. The challenges and future prospects in MXene-derived water-related technologies are identified to facilitate their practical implementation.

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COF-Based Composites: Extraordinary Removal Performance for Heavy Metals and Radionuclides from Aqueous Solutions

Cited by 62 publications

References 114 publications

Dual Charge-Transfer Channels Harmonize Carrier Separation for Efficient U(VI) Photoreduction

Dual Charge-Transfer Channels Harmonize Carrier Separation for Efficient U(VI) Photoreduction

Novel Microwave-Assisted Synthesis of COFs: 2020–2022

MXenes and MXene-Based Materials for Removal and Detection of Water Contaminants: A Review

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