Exfoliation, delamination, and oxidation stability of molten salt etched Nb2CTz MXene nanosheets

Arole, Kailash; Blivin, Jackson W.; Bruce, Atiana M; Athavale, Swarnima; Echols, Ian; Cao, Huaixuan; Tan, Zeyi; Radović, Miladin; Lutkenhaus, Jodie L.; Green, Micah J.

doi:10.1039/d2cc02237k

Cited by 35 publications

(22 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This propensity to oxidize is affected by the structure of the MXene nanosheet itself. It has been demonstrated that MXenes with a higher value of n in their general formula M n +1 X n T z are more stable. ,, Sang et al reported that harsh etching conditions such as the use of concentrated HF results in defects on the surface of MXenes . These defects act as nucleation sites for degradation reactions.…”

Section: Challenge Of Degradationmentioning

confidence: 99%

“…19 However, Arole et al has successfully obtained colloidally stable Ti 3 C 2 T z nanosheet dispersions by adding −OH terminal groups via a potassium hydroxide (KOH) wash, which holds promise for scaling up this technique. 20,21 ■…”

Section: ■ Introductionmentioning

confidence: 99%

“…Usually, molten salt etching cannot produce stable colloidal dispersions due to a lack of −OH terminal groups . However, Arole et al has successfully obtained colloidally stable Ti 3 C 2 T z nanosheet dispersions by adding −OH terminal groups via a potassium hydroxide (KOH) wash, which holds promise for scaling up this technique. , …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Advances in the Chemical Stabilization of MXenes

et al. 2023

Self Cite

View full text Add to dashboard Cite

MXenes are 2D nanomaterials with a wide array of possible compositions; they feature a unique combination of properties such as high electrical conductivity, hydrophilicity, and colloidal stability which makes them attractive for a variety of applications. However, the shelf life and industrial utility of MXenes face challenges due to their tendency to oxidize and disintegrate, particularly in dispersions. Thus, it is crucial to find effective ways to ensure the degradation stability of MXenes. This feature article reviews the key factors affecting the degradation of MXenes such as pH, concentration of the dispersion, humidity, and storage temperature. In addition, we review our group’s progress in mitigating the degradation of MXenes such as low-temperature storage, the use of antioxidants, and thermal annealing, particularly for Ti3C2T z . These simple approaches may allow for applications of MXenes on a commercial scale.

show abstract

Section: Challenge Of Degradationmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Advances in the Chemical Stabilization of MXenes

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…Finally, the few-layered MXenes nanosheets can be obtained by ultrasonic and centrifugation processing [151,152]. Nevertheless, MXenes prepared by Lewis acidic etching method fail to be terminated by -OH functional group, which greatly decreases their hydrophilicity [153][154][155]. Therefore, it is difficult to uniformly disperse the obtained MXenes in water to form stable colloidal solution, which greatly reduces the delamination efficiency, thus exhibiting a low yield of few-layered and single-layered nanosheets.…”

Section: Delamination Of Multi-layered Mxenesmentioning

confidence: 99%

Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Huang

Han

2023

Nano-Micro Lett.

View full text Add to dashboard Cite

Since the discovery in 2011, MXenes have become the rising star in the field of two-dimensional materials. Benefiting from the metallic-level conductivity, large and adjustable gallery spacing, low ion diffusion barrier, rich surface chemistry, superior mechanical strength, MXenes exhibit great application prospects in energy storage and conversion, sensors, optoelectronics, electromagnetic interference shielding and biomedicine. Nevertheless, two issues seriously deteriorate the further development of MXenes. One is the high experimental risk of common preparation methods such as HF etching, and the other is the difficulty in obtaining MXenes with controllable surface groups. Recently, Lewis acidic etching, as a brand-new preparation strategy for MXenes, has attracted intensive attention due to its high safety and the ability to endow MXenes with uniform terminations. However, a comprehensive review of Lewis acidic etching method has not been reported yet. Herein, we first introduce the Lewis acidic etching from the following four aspects: etching mechanism, terminations regulation, in-situ formed metals and delamination of multi-layered MXenes. Further, the applications of MXenes and MXene-based hybrids obtained by Lewis acidic etching route in energy storage and conversion, sensors and microwave absorption are carefully summarized. Finally, some challenges and opportunities of Lewis acidic etching strategy are also presented.

show abstract

“…19 Thus, molten salt etching avoids the hazards associated with acid etching and allows for better control over the terminal group distribution of MXenes. [20][21][22] Despite the extraordinary potential of MXenes, degradation remains an issue which affects the shelf-life of MXenes. Many studies have investigated factors such as pH, temperature, and oxygen responsible for the degradation of MXenes.…”

Section: Introductionmentioning

confidence: 99%

Effect of terminal groups on the degradation stability of Ti₃C₂T_z MXenes

Athavale,

Micci-Barreca,

Arole

et al. 2023

Nanoscale

Self Cite

View full text Add to dashboard Cite

show abstract

Exfoliation, delamination, and oxidation stability of molten salt etched Nb₂CT_z MXene nanosheets

Abstract: Despite numerous prior reports of molten salt etching of MAX phases, few of these reports achieved water-dispersible MXene nanosheets, and none for Nb-based MXenes. Here we demonstrate the synthesis and...

Cited by 35 publications

References 31 publications

Advances in the Chemical Stabilization of MXenes

Advances in the Chemical Stabilization of MXenes

Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Effect of terminal groups on the degradation stability of Ti₃C₂T_z MXenes

Contact Info

Product

Resources

About

Exfoliation, delamination, and oxidation stability of molten salt etched Nb2CTz MXene nanosheets

Abstract: Despite numerous prior reports of molten salt etching of MAX phases, few of these reports achieved water-dispersible MXene nanosheets, and none for Nb-based MXenes. Here we demonstrate the synthesis and...

Cited by 35 publications

References 31 publications

Advances in the Chemical Stabilization of MXenes

Advances in the Chemical Stabilization of MXenes

Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Effect of terminal groups on the degradation stability of Ti3C2Tz MXenes

Contact Info

Product

Resources

About

Exfoliation, delamination, and oxidation stability of molten salt etched Nb₂CT_z MXene nanosheets

Effect of terminal groups on the degradation stability of Ti₃C₂T_z MXenes