2D titanium carbide-based nanocomposites for photocatalytic bacteriostatic applications

A novel multimodal antibacterial platform is constructed by the in situ growth of a bioactive zinc-based metal-organic framework (Zn-MOF) using the natural antibacterial agent (curcumin) as ligand over the Ti 3 C 2 T x nanosheets (NSs) for highly effective bacteria-infected wound healing. As Zn nodes in Zn-MOF can be partially exchanged by Ti sites in Ti 3 C 2 T x NSs, a novel oxygen vacancy-rich Schottky junction is formed at the interface between Zn-MOF and Ti 3 C 2 T x NSs, which can remarkably improve the separation and electron transfer efficiency of photoinduced carriers under near-infrared light irradiation (808 nm). Consequently, it affords the Zn-MOF@Ti 3 C 2 T x Schottky junction abundant superoxide radicals (•O 2 À ) and hydroxyl radicals (•OH) by electron transfer via type I mechanism and singlet oxygen ( 1 O 2 ) by energy transfer via type II mechanism, accompanying the superior photothermal performance and controllable release of Zn 2þ ions and curcumin. The Zn-MOF@Ti 3 C 2 T x shows excellent biocompatibility and multimodal antibacterial ability toward Staphylococcus aureus and Escherichia coli. Based on the detailed investigations of the antibacterial mechanism, the Zn-MOF@Ti 3 C 2 T x Schottky junction remarkably demonstrates accelerated wound healing (wound closure ratio is >99%) infected by S. aureus.

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“…In addition, Ti 3 C 2 T x NSs were prepared by exfoliation from commercial Ti 3 C 2 T x MXene. [ 60 ]…”

Section: Methodsmentioning

confidence: 99%

Multimodal Antibacterial Platform Constructed by the Schottky Junction of Curcumin‐Based Bio Metal–Organic Frameworks and Ti₃C₂T_x MXene Nanosheets for Efficient Wound Healing

Guo

Cheng

Liang

et al. 2022

Advanced NanoBiomed Research

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“…In addition, different MXenes-based composites have also been fabricated through in situ growth of semiconductors on the 2D surface of MXenes, such as Ti 3 C 2 T x -CdS, [70,71] Ti 3 C 2 T x -ZnS, [72] [73] Ti 3 C 2 T x -ZnIn 2 S 4 , [74] Ti 3 C 2 T x -BiOBr, [75] Ti 3 C 2 T x -BiOCl, [76] [77] Nb 2 CT x -TiO 2 , [34] Nb 2 CT x -Bi 2 WO 6 , [78] Mo 2 CT x -CdS, [79] etc. [80][81][82][83][84][85][86] (detailed information can be found in Table 1). Notably, the surface of MXenes features with functional groups as well as high-portion exposed transition metal atoms.…”

Section: Growing Platformmentioning

confidence: 99%

Positioning MXenes in the Photocatalysis Landscape: Competitiveness, Challenges, and Future Perspectives

Xie

Zhang

2020

Adv Funct Materials

187

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MXenes are becoming a worthy contender for boosting the efficacy of semiconductor photocatalysts because of their rich surface and electronic properties, which is exemplified to be a dynamic yet open‐ended exploration of the materials space. Herein, the promise that MXenes hold for photocatalytic applications is elucidated by presenting the various roles of MXenes in the preparation of composite photocatalysts and enhancing their activity and stability. A specific focus is put on the key issues that should be taken into account when utilizing the specific function of MXenes and the strategies to deliver the great potential of MXenes into better play. The discussion is based on different aspects closely related to the flexible surface and electronic features of MXenes, including their morphology control, stability issue, and electronic structure mutability with the purpose to present an objective and comprehensive scenario of MXenes for photocatalysis. Finally, some noteworthy research directions for the future development of MXenes‐based photocatalytic systems are outlined and prospected. This review is expected to provide a useful scaffold for the rational design and synthesis of efficient and stable MXenes‐based photocatalysts by objectively understanding and taming the functional vitality of MXenes.

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“…Transition metal carbide materials, such as titanium carbide (Ti 3 C 2 T x )-based materials have the following characteristic properties: high melting point (up to 3260 °C), remarkable chemical and thermal stability, high rigidity, and high electrical conductivity [46][47][48]. Ti 2 CT x are the lightest transition metal carbides, nitrides, or carbonitrides (MXene) and supposed to have a larger surface capacity than Ti 3 C 2 T x for the larger surface area and more functional groups per unit mass [49,50].…”

Section: Titanium-based Nanocompositesmentioning

confidence: 99%

Supercapacitor performances of titanium–polymeric nanocomposites: a review study

2021

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This review article presents a research and technological investigation on supercapacitors and describes the recent advances of titanium-based materials in these areas. The introduction covers the properties of titanium materials, electrochemical performances of total stored charges, electric double layer capacitance (EDLC), and pseudocapacitance. The following two sections focus on the synthesis and capacitance results of titanium carbide (Ti 3 C 2 Tx) and titanium nitride (TiN), respectively. In the last section of this review, the role of titanium dioxide (TiO 2 ) is demonstrated in the supercapacitors of TiO 2 -based, carbon/TiO 2 -based, metal/TiO 2 -based, and conducting polymer/TiO 2 nanocomposites. Many factors affect the electrochemical performance of supercapacitor devices, such as doping process, conductivity, interaction between components of nanocomposite, electrolyte type, and structure type, etc. In the end, future perspectives and challenges are summarized and considered for future TiO 2 -based nanocomposite supercapacitors. A total of 182 references are cited to understand the effects of TiO 2 -based materials on supercapacitor device performances.

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2D titanium carbide-based nanocomposites for photocatalytic bacteriostatic applications

Cited by 106 publications

References 56 publications

Multimodal Antibacterial Platform Constructed by the Schottky Junction of Curcumin‐Based Bio Metal–Organic Frameworks and Ti₃C₂T_x MXene Nanosheets for Efficient Wound Healing

Multimodal Antibacterial Platform Constructed by the Schottky Junction of Curcumin‐Based Bio Metal–Organic Frameworks and Ti₃C₂T_x MXene Nanosheets for Efficient Wound Healing

Positioning MXenes in the Photocatalysis Landscape: Competitiveness, Challenges, and Future Perspectives

Supercapacitor performances of titanium–polymeric nanocomposites: a review study

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2D titanium carbide-based nanocomposites for photocatalytic bacteriostatic applications

Cited by 106 publications

References 56 publications

Multimodal Antibacterial Platform Constructed by the Schottky Junction of Curcumin‐Based Bio Metal–Organic Frameworks and Ti3C2Tx MXene Nanosheets for Efficient Wound Healing

Multimodal Antibacterial Platform Constructed by the Schottky Junction of Curcumin‐Based Bio Metal–Organic Frameworks and Ti3C2Tx MXene Nanosheets for Efficient Wound Healing

Positioning MXenes in the Photocatalysis Landscape: Competitiveness, Challenges, and Future Perspectives

Supercapacitor performances of titanium–polymeric nanocomposites: a review study

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Product

Resources

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Multimodal Antibacterial Platform Constructed by the Schottky Junction of Curcumin‐Based Bio Metal–Organic Frameworks and Ti₃C₂T_x MXene Nanosheets for Efficient Wound Healing

Multimodal Antibacterial Platform Constructed by the Schottky Junction of Curcumin‐Based Bio Metal–Organic Frameworks and Ti₃C₂T_x MXene Nanosheets for Efficient Wound Healing