4.7 Review

Recent research progress in CDs@MOFs composites: fabrication, property modulation, and application

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Summary: This paper focuses on the chromogenic materials and sensing strategies for the colorimetric detection of heavy metal ions. The unique optical and chemical properties of each chromogenic material result in different colorimetric sensing mechanisms. The review categorizes the chromogenic materials into organic, inorganic, and other materials, and discusses their detailed sensing strategies, performance, and real sample applications. Current challenges and prospects related to the colorimetry of heavy metal ions are also explored.

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Metal-Organic Frameworks Encapsulating Carbon Dots Enable Fast Speciation of Mono- and Divalent Copper

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Summary: In this study, a dual-channel fluorescence nanoprobe was developed for the speciation of mono- and divalent copper. By conjugating carbon dots (CDs) with Eu-based metal-organic frameworks (Eu-MOFs), the obtained Eu-MOFs@CD nanoprobe enables fast and accurate detection of copper species in biological matrixes.

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Zeolitic Imidazolate Frameworks (ZIFs) for aqueous phase adsorption - A review

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Carboxylated carbon quantum dot-induced binary metal-organic framework nanosheet synthesis to boost the electrocatalytic performance

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Highly efficient As(III) removal through simultaneous oxidation and adsorption by N-CQDs modified MIL-53(Fe)

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Summary: This study presents the use of nitrogen doped carbon quantum dots (N-CQDs) modified oil vine-like structural MIL-53(Fe) for highly efficient removal of aqueous arsenites [As(III)]. The photocatalytic oxidation of As(III) and simultaneous adsorption of the generated arsenate [As(V)] were achieved, with N-CQDs3/MIL-53(Fe) exhibiting over 6 times higher As(III) oxidation ability and removal efficiency compared to pure MIL-53(Fe). The enhanced performance of N-CQDs3/MIL-53(Fe) is attributed to accelerated separation of photogenerated electron-hole by in situ embedded N-CQDs. Experimental analysis and density functional theory (DFT) calculations confirmed that the edge structure of C/O site significantly improves As(III) removal ability through the formation of bidentate C-O-As bonds and occupying coordinatively unsaturated atoms. Therefore, N-CQDs3/MIL-53(Fe) offers a new potential strategy for the development of high efficient MOF-based materials for As(III) removal.

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Imparting down/up-conversion dual channels fluorescence to luminescence metal-organic frameworks by carbon dots-induced for fluorescence sensing

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Photocatalytic reduction of CO2 to methanol using Zr(IV)-based MOF composite with g-C3N4 quantum dots under visible light irradiation

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Embedding carbon dots in Eu3+-doped metal-organic framework for label-free ratiometric fluorescence detection of Fe3+ions

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