Solvothermal synthesis of in situ nitrogen-doped Ti3C2 MXene fluorescent quantum dots for selective Cu2+ detection

Feng, Yefeng; Zhou, Furong; Deng, Qihuang; Peng, Cheng

doi:10.1016/j.ceramint.2019.12.063

Cited by 117 publications

(80 citation statements)

References 37 publications

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“…In addition to the aforementioned applications for energy storage and conversion, hetero‐MXenes can be employed in other fields such as sensors, [ 61,202,232,240 ] optoelectronic devices, [ 48 ] seawater desalination, [ 200 ] and catalysts. [ 113,239 ] Similar to pristine MXenes, hetero‐MXenes are suitable to detect small molecules and heavy metal ions due to their high specific surface areas.…”

Section: Applications Of Hetero‐mxenesmentioning

confidence: 99%

“…found that the N‐Ti 3 C 2 QDs exhibit distinguished fluorescence quenching response to various metal cations and that show a higher sensitivity for Cu 2+ ions than that of Fe 3+ ions ( Figure a). [ 202 ] In addition, alkaline intercalated Ti 3 C 2 was used as an electrode material to detect trace amounts of heavy metal ions, exhibiting high sensitivity for Cd 2+ , Pb 2+ , Cu 2+ , and Hg 2+ ions with detection limits of 0.098 × 10 −6 , 0.041 × 10 −6 , 0.032 × 10 −6 , and 0.13 × 10 −6 m , respectively (Figure 21b,c). [ 232 ] Moreover, mutual interference among various cations has been explored in the electrochemical detection, where Pb 2+ ions are preferred to deposit in the presence of other ions while the sensitivity for Hg 2+ ions can be enhanced in the presence of Cd 2+ .…”

Section: Applications Of Hetero‐mxenesmentioning

confidence: 99%

Section: Applications Of Hetero‐mxenesmentioning

confidence: 99%

“…Therefore, other organic amines with high boiling points have been applied to fabricate N‐doped MXenes. For instance, ethanediamine [ 61 ] and diethylenetriamine [ 202 ] were used to synthesize N‐Ti 3 C 2 QDs by hydrothermal and solvothermal methods, respectively. In order to acquire better nitrogen doping, diethanolamine is intercalated into Ti 3 C 2 flakes with the assistance of methanol solvent and N‐Ti 3 C 2 nanosheets can be achieved by a subsequent solvothermal reaction (Figure 11b).…”

Section: Hetero‐mxenesmentioning

confidence: 99%

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Hetero‐MXenes: Theory, Synthesis, and Emerging Applications

et al. 2021

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Since their discovery in 2011, MXenes (abbreviation for transition metal carbides, nitrides, and carbonitrides) have emerged as a rising star in the family of 2D materials owing to their unique properties. Although the primary research interest is still focused on pristine MXenes and their composites, much attention has in recent years been paid also to MXenes with diverse compositions. To this end, this work offers a comprehensive overview of the progress on compositional engineering of MXenes in terms of doping and substituting from theoretical predictions to experimental investigations. Synthesis and properties are briefly introduced for pristine MXenes and then reviewed for hetero‐MXenes. Theoretical calculations regarding the doping/substituting at M, X, and T sites in MXenes and the role of vacancies are summarized. After discussing the synthesis of hetero‐MXenes with metal/nonmetal (N, S, P) elements by in situ and ex situ strategies, the focus turns to their emerging applications in various fields such as energy storage, electrocatalysts, and sensors. Finally, challenges and prospects of hetero‐MXenes are addressed. It is anticipated that this review will be beneficial to bridge the gap between predictions and experiments as well as to guide the future design of hetero‐MXenes with high performance.

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Section: Applications Of Hetero‐mxenesmentioning

confidence: 99%

Section: Applications Of Hetero‐mxenesmentioning

confidence: 99%

Section: Applications Of Hetero‐mxenesmentioning

confidence: 99%

Section: Hetero‐mxenesmentioning

confidence: 99%

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Hetero‐MXenes: Theory, Synthesis, and Emerging Applications

et al. 2021

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“…As seen in Section 2 , MXenes possess not only electrical or electrochemical advantages such as high electrical conductivity, electrochemical activities, and large surface area, but also strong fluorescence efficiency [ 29 , 68 ]. In addition, MXenes show many useful characteristics suitable for fluorescent biosensors, including chemical stability, easy surface functionalization, fluorescent MQDs with high water solubility, dispersibility, and biocompatibility due to their high hydrophilicity; thus, development of fluorescent biosensors based on MXene nanosheets has gained momentum [ 41 , 69 , 70 ].…”

Section: Mxene-based Fluorescent/optical Biosensorsmentioning

confidence: 99%

Recent Advances in MXene Nanocomposite-Based Biosensors

et al. 2020

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The development of advanced biosensors with high sensitivity and selectivity is one of the most demanded concerns in the field of biosensors. To meet this requirement, up until now, numerous nanomaterials have been introduced to develop biosensors for achieving high sensitivity and selectivity. Among the latest nanomaterials attracting attention, MXene is one of the best materials for the development of biosensors because of its various superior properties. MXenes are two-dimensional inorganic compounds with few atomic layers that possess excellent characteristics including high conductivity and superior fluorescent, optical, and plasmonic properties. In this review, advanced biosensors developed on the basis of the MXene nanocomposite are discussed with the selective overview of recently reported studies. For this, introduction of the MXene including the definition, synthesis methods, and its properties are discussed. Next, MXene-based electrochemical biosensors and MXene-based fluorescent/optical biosensors are provided, which are developed on the basis of the exceptional properties of the MXene nanocomposite. This review will suggest the direction for use of the Mxene nanocomposite to develop advanced biosensors with high sensitivity and selectivity.

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