Article
Chemistry, Multidisciplinary
Qingchao Shen, Chaoran Chen, Jiao Long, Saili Wang
Summary: In this study, a cost-effective and environmentally friendly method was proposed to obtain reproducible 2D Ti3C2Tx. The key role of hydrofluoric acid as an etchant was addressed, and the recycling of HF was achieved. Dimethyl sulfoxide was used to promote the exfoliation of multilayer Ti3C2Tx into nanosheets in an aqueous solution, leading to improved performance of perovskite solar devices.
Article
Nanoscience & Nanotechnology
Yanxiao Li, Shuohan Huang, Congjie Wei, Dong Zhou, Bo Li, Chenglin Wu, Vadym N. Mochalin
Summary: This study utilized atomic force microscopy (AFM) with SiO2 tip and Ti3C2Tx and Ti2CTx MXene-coated tips to measure the adhesion energies of graphene, MoSe2, Ti3C2Tx, and Ti2CTx MXene with other 2D materials. The measured adhesion energies showed that only interfaces involving graphene exhibited dependence on the number of material monolayers in a stack.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Shudan Wei, Xiaojun Lai, Girish M. Kale
Summary: The present study focuses on the synthesis of multilayered MBenesMoAl(1-x)B with different degrees of Al deintercalation using a mild, fluorine-free approach. The study explores the application and energy storage mechanism of MBenes in supercapacitors, marking the first investigation of its kind. The research demonstrates the potential of MBenes in supercapacitors and provides insights into their synthesis and performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
J. A. Ocadiz-Flores, A. E. Gheribi, J. Vlieland, D. de Haas, K. Dardenne, J. Rothe, R. J. M. Konings, A. L. Smith
Summary: The short-range structures of alkali actinide fluorides were investigated using in situ high temperature Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy. The data showed that the average coordination number decreases with increasing size of the alkali cation, and increases with the content of AnF(4). An average coordination number close to 6 was observed in melts of alkali actinide fluorides when CsF was used as solvent, which had not been detected before.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Ceramics
Gim Pao Lim, Chin Fhong Soon, Agnieszka Maria Jastrzebska, Nyuk Ling Ma, Anita Rozmyslowska Wojciechowska, Aleksandra Szuplewska, Wan Ibtisam Wan Omar, Marlia Morsin, Nafarizal Nayan, Kian Sek Tee
Summary: MXenes, a novel 2-D material, are extensively studied for applications in advanced biocomposites and water purification. This study investigated the cytotoxicity of Ti2CTx MXene against cervical cancer cell lines, suggesting that the toxicity may be due to direct contact with the cell membrane.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Baoji Miao, Yange Cao, Qingsong Zhu, Muhammad Asif Nawaz, Jose Antonio Ordiozola, Tomas Ramirez Reina, Zhiming Bai, Junna Ren, Fengchun Wei
Summary: The development of modern microwave communication technology requires the resolution of signal crosstalk and electromagnetic interference (EMI) problems for better working frequency and transmission power of electronic systems. New absorbing materials such as MoS2/TiO2/Ti2CTx and MoS2/Ti2CTx composites meet the criteria of thin, strong, lightweight, and wideband for excellent absorbing performance. The MoS2/Ti2CTx composite, with an extreme reflection loss (RLmin) of -54.70 dB at a frequency of 7.59 GHz and a thickness of 3.39 mm, achieves a maximum effective absorption bandwidth (EABmax) of 4 GHz.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
John Hennessy, April D. Jewell, John-Paul Jones, Garrison M. Crouch, Shouleh Nikzad
Summary: Utilizing alkali halide compounds during TMA etching can enhance the efficiency of Al2O3 etching, allowing for lower substrate temperatures and continuous etching. This approach also enables selective thin-film deposition at reduced temperatures, presenting potential for extending the method to other material systems.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
Yi Wei, Peng Zhang, Razium A. Soomro, Qizhen Zhu, Bin Xu
Summary: MXenes, versatile materials with adjustable structures and rich surface chemistry, have been recognized as potential 2D materials for various applications. Recent research has focused on synthetic routes, etching methods, and delamination strategies for large-scale preparation and stable storage. Antioxidation strategies for MXenes have also been summarized for future developments and practical applications.
ADVANCED MATERIALS
(2021)
Review
Engineering, Environmental
Fei Wang, Shujuan Wang, Feng Tian, Fuqian Wang, Xuewen Xia, Qi Zhang, Zhongya Pang, Xing Yu, Guangshi Li, Hsien-Yi Hsu, Shen Hu, Li Ji, Qian Xu, Yufeng Zhao, Xingli Zou, Xionggang Lu
Summary: Two-dimensional (2D) MXenes have attracted interdisciplinary interest due to their exceptional conductivity, adjustable layered structures, and controllable functional groups. This review comprehensively summarizes the latest progress on molten-salt-assisted approaches for synthesizing high-quality 2D MXenes and their synthesis mechanisms. The effects of these methods on the physical/chemical properties of MXenes are discussed, along with examples of MXenes with tunable surface termination, interlayer spacing, size, and morphology. The review also discusses the challenges and prospects of molten-salt-assisted approaches.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Jiana Hu, Caiyun Liang, Jiadong Li, Chuanwei Lin, Yongjiu Liang, Hui Wang, Xing Li, Qianglong Wang, Dewen Dong
Summary: In this study, double-layered MXene-Fe/CNT/SR composites were successfully synthesized via a green and facile method. The composites exhibited excellent microwave absorption properties due to appropriate impedance matching, strengthened internal reflection, polarization, magnetic loss, and conductive loss. The developed composites have great potential for high-performance microwave absorption applications.
Article
Chemistry, Applied
Viktoria Babic, Siddardha Koneti, Simona Moldovan, Nikolai Nesterenko, Jean-Pierre Gilson, Valentin Valtchev
Summary: NH4-SSZ-13 zeolite is etched using an aqueous solution of 40% NH4F under different time/temperature conditions to obtain hierarchical derivatives. The zeolites exhibit sensitivity to high temperature and high liquid-solid ratio treatments, which can lead to significant crystallinity losses. Careful tuning of these parameters is necessary to retain important characteristics in the hierarchical derivatives. The catalytic activity of the modified SSZ-13 is evaluated in n-propanol conversion.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Guangzhi Lu, Shijiao Sun, Meifen Wu, Xiangyu Zhao, Liqun Ma
Summary: In this study, a two-dimensional Ti2CTx with expanded interlayer was designed as an anode material for Na-ion batteries by intercalation of dimethyl sulfoxide. The interlayer-expanded Ti2CTx exhibited a higher initial discharge capacity of 486 mAh g(-1) and maintained a stable capacity of 176 mAh g(-1) after 250 cycles at 100 mA g(-1), compared to the pristine Ti2CTx.
Article
Electrochemistry
A. Kosov, O. L. Semerikova, S. V. Vakarin, O. Grishenkova, A. A. Trofimov, A. M. Leonova, N. M. Leonova, Y. P. Zaikov
Summary: The surface modification of Si wafers using polytungstate melts was studied, resulting in the formation of upright and inverted pyramids on the Si surface. The photocurrent density of these samples was significantly higher compared to untreated Si wafers or those treated with NaOH solution, demonstrating an improvement in solar cell performance. Additionally, unique eight-faceted pyramids were formed on the Si surface under different processing conditions, indicating the potential for further optimization in terms of surface texturing.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Cody B. Cockreham, Vitaliy G. Goncharov, Ellis Hammond-Pereira, Margaret E. Reece, Andrew C. Strzelecki, Wenqian Xu, Steven R. Saunders, Hongwu Xu, Xiaofeng Guo, Di Wu
Summary: This study investigates the effects of etching environments on the properties of MXene materials and reveals that different etching methods result in different distributions of interlayer distances, numbers of intercalated cations, and degrees of hydration. Moreover, the study elucidates the mechanisms of how intercalants and surface groups impact MXene materials through experimental data and computational results.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Suhee Choi, Andrew R. Strianese, Olivia Dale, Michael F. Simpson
Summary: This study introduces a method for ranking the rate of corrosion of metals in molten fluoride or chloride salts based on ZRA. The experiments showed that adding Li metal in fluoride salt significantly reduced the oxidation current of SS-316L, while consistency was observed between the ZRA response of different metal alloys and post-test analysis in chloride salt.
