JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2019
·Vol. 34
·期 2
·299-302
·
IF 0.605
Yan Ming,Yang Lei,Li Chao,Zou Yunqi
We prepared a two-dimensional transition metal carbide Ti 2 CT x by treatment of Ti2AlC in molten fluoride salt. Two fluorinated salt systems were used to etch Al from Ti 2 AlC powder precursor under the argon atmosphere, and then the resulting MXene was delaminated with TBAOH to produce few-layered nanosheets of Ti 2 CT x . The reaction was undergone at different temperatures to study the effect of temperature. The results show that the optimal reaction temperature is 600 °C in LiF-NaF-KF system, and 850 °C in NaFKF system. The molten salt treated products are delaminated and quasi-2D MXene sheets can be obtained. The thickness of the MXene sheets prepared from the binary molten salt system is smaller than that of the ternary molten salt system.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Ruiyang Yu,Hui Qiao,Zongyu Huang,Pinghua Tang,Xiang Qi
Ti2CTx is a typical 2D layered semiconductor material with a high carrier mobility and intriguing photodetector performance. In this work, a Ti2CTx/W18O49 heterostructure was fabricated via a simple one-pot hydrothermal method. The photoelectrochemical (PEC)-type photodetector was constructed by using the as-prepared composite as the electrode material. The Ti2CTx/W18O49 heterostructure clearly exhibited a significant increase in photoresponse compared to that of solitary Ti2CTx and W18O49, as shown by the results of the PEC tests. This demonstrates how the Ti2CTx and W18O49 interface effectively generates and transfers photocarriers, which can enhance the photoresponse performance. Additionally, the constructed Ti2CTx/W18O49 heterostructure-based photodetector’s photocurrent density can practically linearly increase as the irradiation power density rises. The photocurrent density and photoresponsivity can reach 1.42 μA/cm2 and 19.6 μA/W at 0.6 V, respectively. The prepared Ti2CTx/W18O49 heterostructure-based photodetector also shows excellent cycle stability; after more than 2500 s and 125 on/off cycles, the photocurrent shows no obvious attenuation. The superb PEC-type photodetector performance of a Ti2CTx/W18O49 heterostructure holds much promise for photodetection.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Ruiyang Yu,Hui Qiao,Gengcheng Liao,Zongyu Huang,Qiaoliang Bao,Xiang Qi
Here, a photoelectrochemical (PEC) photodetector with good flexibility and high photoresponsivity was successfully fabricated in a vertical structure, where the MXene (Ti2CTx) nanosheet and carbon black electrode were separated by adenosine triphosphate/nicotinamide adenine dinucleotide phosphate (ATP/NADPH)-incorporated solid-state electrolyte. The photocurrent and photoresponsivity can reach 1.84 μA/cm2 and 8.89 μA/W, respectively, under a light intensity of 90 mW/cm2 at a bias potential of 0.6 V, which are approximately 2.3 times those of Ti2CTx nanosheets. The addition of ATP and NADPH to the electrolyte also leads to a large decrease of the rise time from 0.76 to 0.26 s. Furthermore, the photodetector can continue to function and maintain stability under 45° bending and after 500 cycles of bending, indicating a robust device structure and great flexibility. The performance enhancement of the PEC photodetector can be attributed to the synergistic effect of electrolyte additives on Ti2CTx nanosheets, where ATP and NADPH greatly enhance the circulation and utilization of photogenerated carriers. This work suggests that the incorporation of chloroplast-inspired carrier circulation with two-dimensional nanosheets could achieve efficient light-current conversion, providing a new strategy to improve the performance of PEC-type photodetectors.
研究领域:
材料科学
·
光电器件
·
生物启发设计
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2019
·
IF 7.466
Xinliang Li,Xiaowei Yin,Shuang Liang,Minghang Li,Laifei Cheng,Litong Zhang
High electrical conductivity and the layered structure features are desired for high-performance electromagnetic interference (EMI) shielding materials. Although 2D graphene has proven to be a promising EMI shielding material, the complex preparation, including the necessary reduction process accompanied by the sacrifice of functional groups, and subsequent structural design inevitably limit its practical application. Herein, conductive 2D Ti 2 CT X MXene with native sandwich-like structure and abundant surface functional groups is synthesized via a simple chemical etching process. The Ti 2 CT X MXene exhibits excellent EMI shielding performance which exceeds 70 dB at only 0.8 mm in X-band, surpassing most of reported graphene-based EMI shielding composites. The multilayered structure obviously strengthens the internal EM attenuation and greatly improves the absorption effectiveness, while the high electrical conductivity ensures sufficient EM reflection on the surface. In addition, the high conductivity, unique structure, and abundant surface functional groups make Ti 2 CT X MXene a promising candidate in energy storage and multifunctional composites application beyond EMI shielding.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 30
·7621-7628
·
IF 5.256
Xinliang Li,Xiaowei Yin,Meikang Han,Changqing Song,Xinnan Sun,Hailong Xu,Laifei Cheng,Litong Zhang
Herein, Ti2CTx MXene and its derivatives with various heterogeneous structures were constructed via etching and a facile oxidation treatment. The effect of different oxidation conditions on their structural evolution and phase composition was studied in detail. Compared with that of pristine Ti2CTx MXene, the improvement in the electromagnetic wave absorption capability of the as-prepared Ti2CTx/TiO2 and C/TiO2 nanocomposites was attributed to their enhanced polarization loss and stronger conductivity loss. The enhanced polarization loss is caused by the generated heterogeneous interfaces and higher specific surface area, and the stronger conductivity loss is due to the completely exfoliated carbon layers. Additionally, the remaining multilayered structure after exfoliation of the carbon layers favors energy dissipation. The C/TiO2 nanocomposites attain a minimum reflection coefficient of −50.3 dB at 7.1 and 14.2 GHz, and an effective absorption bandwidth of 4.7 GHz (covering the whole X-band) with a matching thickness of 2.1 mm; this indicates their excellent electromagnetic wave absorption properties. We believe that these nanocomposites with a heterogeneous structure also hold great promise for application in the fields of photocatalysis, lithium batteries, water purification, etc.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2025
·
IF 6.9
Jinlin Fan,Yundan Liu,Zixuan Guo,Yuan Ji,Zongyu Huang,Zengjie Bo,Hui Qiao,Qiaoliang Bao,Xiang Qi
Hydrogels are excellent stretchable engineering materials composed of polymers, which are widely studied as flexible conductors in smart, flexible devices. However, hydrogels have only been studied for their electrical conductivity, which hinders their further application in optoelectronic devices. Herein, a hydrogel photoelectrochemical (PEC) photodetector by using polyvinyl alcohol (PVA) hydrogel as an electrolyte carrier and further embedding Ti 2 CT x nanosheets in the hydrogel is presented. Under a bias potential of 0.6 V and a light intensity of 60 mV cm −2 , the photodetector exhibited a photocurrent density of 0.178 μA cm −2 and a responsivity of 2.96 μA W −1 . Furthermore, due to the structure of the special nanosheets network of hydrogel photodetectors, the photodetector maintained stable properties even after 1500 cycles of stretching at 100% strain and 50 cycles of cutting-off the self-healing cycle, this indicates that the prepared hydrogel photodetector is a high-quality stretchable, self-healing device. This study provides a novel approach for hydrogel functionalization and widens the design horizons and potential applications of photodetectors.
研究领域:
材料科学
·
光学工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Muhammad Chhattal,Yu Kaihuan,Salamat Ali,Dario F. Zambrano,Andreas Rosenkranz,Philipp G. Grützmacher,Zhenbin Gong,Junyan Zhang
MXene research in tribology has predominantly focused on Ti 3 C 2 T x , overlooking the untapped potential of other promising MXenes with equally intriguing properties. Thus, to enhance tribological reliability in industrial applications, Ti 2 CT x coatings were applied to 316 stainless steel as a solid lubricant. Using a linear ball-on-disk tribometer under 460 MPa pressure, we found that Ti 2 CT x coatings reduced friction by 82% and wear rate by 70% compared to uncoated steel. Advanced characterizations showed that this improved tribology is linked to nanostructured carbon-rich protective tribofilms resulting from the contact pressure-induced graphitization of Ti 2 CT x MXenes sheets. Our research comprehensively elucidates the tribological effectiveness of multi-layer Ti 2 CT x , which is pivotal to design advanced lubricants for contemporary mechanical applications.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Guozhen Liu,Song Liu,Kang Ma,Haoyu Wang,Xiaoyue Wang,Gongping Liu,Wanqin Jin
Recently, owing to their excellent structural and transport properties, two-dimensional membranes have attracted tremendous interest for their potential application in molecular separation. In this work, a new type of functionalized Ti2CTx MXene membrane was proposed by introducing different kinds of polyelectrolytes to regulate the membrane physicochemical structure for pervaporation dehydration of isopropanol dehydration. The morphology, physical, and chemical properties of powders and MXene-based membranes were studied by SEM, AFM, FTIR, XPS, and contact angle test. Meanwhile, the effect of polyelectrolyte functionalization on the MXene membrane performance for isopropanol dehydration was also studied. The results showed that the poly(diallyldimethylammonium chloride) (PDDA) functionalized MXene membrane possesses the highest separation performance owing to the optimized electrostatic effect and hydrophilicity. Besides, other influencing factors including PDDA concentration, MXene loading, and operating conditions on the MXene membrane performance were also systematically investigated. The developed PDDA functionalized MXene membrane showed excellent separation performance for dehydration of 90 wt % isopropanol/water at 50 °C with a total flux of 1237 g/m2·h and separation factor of 1932, showing great potential in application of solvent dehydration.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 2
·1-15
·
IF 20.1
Miao Baoji,Cao Yange,Zhu Qingsong,Nawaz Muhammad Asif,Ordiozola Jose Antonio,Reina Tomas Ramirez,Bai Zhiming,Ren Junna,Wei Fengchun
The signal crosstalk and electromagnetic interference (EMI) problems direly need to be resolved in the rapid development of modern microwave communication technology for a better working frequency and transmission power of electronic systems. Where the new absorbing materials such as molybdenum disulfide (MoS 2 )/titania (TiO 2 )/Ti 2 CT x and MoS 2 /Ti 2 CT x composites could meet the requirement of “thin, strong, light weight, and wide band” for excellent absorbing performance. In this work, a lighter Ti 2 CT x material was selected as the matrix, and MoS 2 was in-situ grown on Ti 2 CT x matrix by traditional hydrothermal method and microwave solvothermal method. The fabricated composite exhibited synergic effect of two-dimensional heterostructural interface and double dielectric elements, where a small amount of TiO 2 and a certain proportion of MoS 2 jointly improve the impedance matching of the composite material. In here, the extreme reflection loss (RL min ) can reach − 54.70 dB (with a frequency of 7.59 GHz, 3.39 mm thickness), and the maximum effective absorption bandwidth (EAB max ) can reach 4 GHz. Polyethylene glycol 200 was used as the solvent instead of water to make Ti 2 CT x less oxidized during the composite process, where the microwave heating would attain fast speed, short time, high efficiency, and uniform product. Since, the MoS 2 /Ti 2 CT x composite without oxidizing possessed a wider effective absorption bandwidth (EAB) at a thinner thickness, thus resulting in the excellent microwave absorption performance and confirming the validity and rationality of new microwave absorption materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 19
·12095-12104
·
IF 10.733
Guozhen Liu,Jie Shen,Yufan Ji,Quan Liu,Gongping Liu,Jian Yang,Wanqin Jin
Two-dimensional (2D) material membranes have shown great potential for molecular separation. However, it remains challenging to controllably tune 2D material membrane structures with ordered nanochannels without non-selective defects. Herein, for the first time, 2D Ti2CTx MXene membranes were designed and fabricated for efficient solvent dehydration via a new strategy. Specifically, positively charged hyperbranched polyethylenimine was intercalated between negatively charged MXene nanosheets to assemble regular stacking structures via electrostatic interactions, followed by interfacial polymerization with trimesoyl chloride to seal possible non-selective defects. This strategy realized integrated Ti2CTx membranes as thin as ∼100 nm with highly ordered 2D nanochannels, thereby exhibiting outstanding separation performance: the water content was enriched to >99 wt% in permeate from 10 wt% water/isopropanol mixtures. Compared with commonly studied Ti3C2Tx MXene membranes prepared by the same approach, the Ti2CTx membranes showed higher selectivity with similarly high flux. The membrane fabrication approach developed herein offers a powerful platform for the rational design of 2D material thin films for precise molecular separation and other applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Soft Science
·
2025
·Vol. 5
·期 4
·N
·
IF 9
Hailong Xu,Chenyang Jing,Zhijian Xu,Haoyang Zhan,Fang Ye,Qiang Chen,Meng Zhu,Luo Kong,Xinliang Li,Xia Chai,Yuchang Qing,Xiaomeng Fan,Fa Luo
With the ever-deepening understanding of nano-electromagnetic interactions and the advancements of fabrication methodologies of nanomaterials, diverse electromagnetic platforms utilizing nanomaterials have been developed for next-generation electromagnetic safeguarding applications. This study presents the design and fabrication of bioinspired porous Ti2CTX/Si3N4 composites featuring an aligned lamellar structure, aimed at facilitating the effective absorption and dissipation of electromagnetic radiation. The layered configuration of Ti2CTX/Si3N4 composites facilitates the repeated reflection of electromagnetic waves between neighboring Ti2CTX layers, hence enhancing the energy dissipation of these waves. At a Ti2CTX concentration of merely 0.21 wt.%, the effective absorption bandwidth of Ti2CTX/Si3N4 composites encompasses the whole X-band (8.2-12.4 GHz), with a minimum reflection loss of -53 dB achievable at a sample thickness of 5 mm. Simultaneously, the fabricated Ti2CTX/Si3N4 composites demonstrate advantages in lightweight characteristics and robust mechanical properties, offering significant insights for the application of Ti2CTX in nano-electromagnetic engineering, particularly in the realm of electromagnetic pollution mitigation.
研究领域:
材料科学
·
纳米技术
·
电磁工程
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Bin Sun,Xusheng Dong,Huapeng Li,Yupeng Shang,Yuxin Zhang,Falu Hu,Shaonan Gu,Yue Wu,Tingting Gao,Guowei Zhou
Exploring versatile materials that efficiently adsorb pollutants from wastewater is of critical importance for environmental remediation. As an emerging 2D material, MXene features a hydrophilic surface with abundant oxygen-containing groups that render a negatively charged surface, implying its great potential for removing cationic pollutants from wastewater. Given its remarkable properties, a novel Ti 2 CT x MXene as an adsorbent is synthesized through selective etching of Al layer from Ti 2 AlC and then ultrasonic exfoliation. The adsorption studies indicate that Ti 2 CT x exhibits highly efficient methylene blue (MB, cationic dye) removal performance, the maximum adsorption capacity can reach as high as 2460.9 mg g −1 , which is considerably higher than the values of graphene (83.2 mg g −1 ) and anionic dye removal (methyl orange, 122.6 mg g −1 ). Furthermore, the adsorption behavior fits well with the pseudo-second-order kinetic and Langmuir isotherm models, and thermodynamic analysis indicates that the adsorption is spontaneous and endothermic. Based on scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transform infrared spectra analysis, the principal adsorption mechanism is related to the electrostatic interaction between Ti 2 CT x and MB molecules. Meanwhile, the result is also confirmed by adsorption experiments at different pH values and background ions. This work shows that the MXene family materials can be applied as high efficiency adsorbent for removing cationic dyes from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）