MXenes induce epitaxial growth of size-controlled noble nanometals: A case study for surface enhanced Raman scattering (SERS)

Cheng, Renfei; Hu, Tao; Hu, Minmin; Li, Changji; Liang, Yan; Wang, Zuohua; Zhang, Hui; Li, Muchan; Wang, Hailong; Lu, Hongxia; Fu, Yuzhuo; Zhang, Hongwang; Yang, Quan‐Hong; Wang, Xiaohui

doi:10.1016/j.jmst.2019.09.013

Cited by 77 publications

(37 citation statements)

References 43 publications

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“…Cheng et al have demonstrated that MXenes with appropriate terminations are capable of reducing noble metal ions into zero-valent metals. 45 It has been reported that the O-containing function groups on CNTs can reduce Au(III) to Au(0). 54 Our results have shown that a pure CNT film containing functional groups is indeed able to reduce Au(III) to Au(0) (Figure 3d and Figure S14a); however, the number of observed Au particles is very limited (Figure 3d), indicating that the reducing ability of CNTs is much lower than that of Ti 3 C 2 T x .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The Ti 3 AlC 2 was synthesized by heating a blend of elemental powders of Ti, Al, and C at 1400 °C for 1.5 h. 44 Ti 3 C 2 T x MXene sheets were prepared using an etching method described in our previous paper. 45 Briefly, Ti 3 AlC 2 powder was first obtained by drilling the as-prepared porous Ti 3 AlC 2 monolith. Then, 1.0 g of LiF was dissolved in 20 mL of 9 M HCl solution by magnetic stirring.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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MXene-Carbon Nanotube Hybrid Membrane for Robust Recovery of Au from Trace-Level Solution

Wang

Cheng

Hou

et al. 2020

ACS Appl. Mater. Interfaces

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The use of precious metals in many areas, such as printed circuit boards, catalysts, and targeted drugs, is increasing due to their unique physical and chemical properties, but their recovery remains a great challenge. Here, we report a sandwiched Ti 3 C 2 T x MXene/carbon nanotube (CNT) hybrid membrane, where the CNT isolates and supports the MXene sheets, which act as a reducing agent. The hybrid membrane shows excellent ability to capture precious metal ions in solution with a high flux. The water permeability of the membrane reaches 437.6 L m −2 h −1 bar −1 (2.46 × 10 −18 m 2 ), about 202 times higher than that of a pure Ti 3 C 2 T x membrane, and captures 99.8% Au(III) from a solution with an extremely low concentration of 20 ppm. The desirable precious metal trapping capability of the Ti 3 C 2 T x −CNT film is due to the high redox activity of C−Ti−OH. This work provides an efficient way for the recovery of precious metal ions from wastewater.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

MXene-Carbon Nanotube Hybrid Membrane for Robust Recovery of Au from Trace-Level Solution

Wang

Cheng

Hou

et al. 2020

ACS Appl. Mater. Interfaces

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“…In the study of preparation of MXene, Cheng et al found that MXene containing precious metal nanoparticles can undergo redox reaction (Cheng et al, 2020 ). In the reaction, the rare metal cation can absorb the electrons provided by MXene, so that MXene can be used as the reaction reducing agent without adding exogenous reducing agent, which reduces the pollution caused by introducing an exogenous reducing agent during the experiment.…”

Section: Several Methods Of Exfoliating 2d Materialsmentioning

confidence: 99%

A Mini Review of the Preparation and Photocatalytic Properties of Two-Dimensional Materials

et al. 2020

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The successful preparation and application of graphene shows that it is feasible for the materials with a thickness of a single atom or few atomic layers to exist stably in nature. These materials can exhibit unusual physical and chemical properties due to their special dimension effects. At present, researchers have made great achievements in the preparation, characterization, modification, and theoretical research of 2D materials. Because the structure of 2D materials is often similar, it has a certain degree of qualitative versatility. Besides, 2D materials often carry good catalytic performance on account of their more active sites and adjustable harmonic electronic structure. In this review, taking 2D materials as examples [graphene, boron nitride (h-BN), transition metal sulfide and so on], we review the crystal structure and preparation methods of these materials in recent years, focus on their photocatalyst properties (carbon dioxide reduction and hydrogen production), and discuss their applications and development prospects in the future.

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“…Due to unsaturated M enabling spontaneous donation of electrons, precursor of metals, such as HAuCl 4 , H 2 PdCl 4 , AgNO 3 , and H 2 PtCl 6 , tailoring the morphologies of MXene sheets would be a fashionable strategy to control their functionality and properties. For instance, Cheng et al [147] have demonstrated that MXenes with appropriate terminations are capable of reducing noble metal ions into zero-valent metals, and the MXenes still remain their native morphologies at microsacle. There is no obvious change in the cross-section structure of MXene anchored by precious metal (Fig.…”

Section: Identification Of Mxene's Microstructure Under Temmentioning

confidence: 99%

From structural ceramics to 2D materials with multi-applications: A review on the development from MAX phases to MXenes

et al. 2021

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MAX phases (Ti3SiC2, Ti3AlC2, V2AlC, Ti4AlN3, etc.) are layered ternary carbides/nitrides, which are generally processed and researched as structure ceramics. Selectively removing A layer from MAX phases, MXenes (Ti3C2, V2C, Mo2C, etc.) with two-dimensional (2D) structure can be prepared. The MXenes are electrically conductive and hydrophilic, which are promising as functional materials in many areas. This article reviews the milestones and the latest progress in the research of MAX phases and MXenes, from the perspective of ceramic science. Especially, this article focuses on the conversion from MAX phases to MXenes. First, we summarize the microstructure, preparation, properties, and applications of MAX phases. Among the various properties, the crack healing properties of MAX phase are highlighted. Thereafter, the critical issues on MXene research, including the preparation process, microstructure, MXene composites, and application of MXenes, are reviewed. Among the various applications, this review focuses on two selected applications: energy storage and electromagnetic interference shielding. Moreover, new research directions and future trends on MAX phases and MXenes are also discussed.

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MXenes induce epitaxial growth of size-controlled noble nanometals: A case study for surface enhanced Raman scattering (SERS)

Cited by 77 publications

References 43 publications

MXene-Carbon Nanotube Hybrid Membrane for Robust Recovery of Au from Trace-Level Solution

MXene-Carbon Nanotube Hybrid Membrane for Robust Recovery of Au from Trace-Level Solution

A Mini Review of the Preparation and Photocatalytic Properties of Two-Dimensional Materials

From structural ceramics to 2D materials with multi-applications: A review on the development from MAX phases to MXenes

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