APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Fanfan Liu,Aiguo Zhou,Jinfeng Chen,Jin Jia,Weijia Zhou,Libo Wang,Qianku Hu
Here we reported the preparation of Ti 3 C 2 MXene and Ti 2 C MXene by etching Ti 3 AlC 2 and Ti 2 AlC with various fluoride salts in hydrochloric acid (HCl), including lithium fluoride (LiF), sodium fluoride (NaF), potassium fluoride (KF), and ammonium fluoride (NH 4 F). As-prepared Ti 2 C was further delaminated by urea, dimethylsulfoxide or ammonium hydroxide. Based on theoretical calculation and XPS results, the type of positive ions (Li + , Na + , K + , or NH 4 + ) in etchant solution affect the surface structure of prepared MXene, which, in turn, affects the methane adsorption properties of MXene. The highest methane adsorption capacity is 8.5 cm 3 /g for Ti 3 C 2 and 11.6 cm 3 /g for Ti 2 C. MXenes made from LiF and NH 4 F can absorb methane under high pressure and can keep methane under normal pressure, these MXenes may have important application on capturing methane or other hazardous gas molecules. MXenes made from NaF and KF can absorb methane under high pressure and release methane under low pressure. They can have important application in the adsorb storage of nature gas.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2023
·
IF 9.9
Hu Dejia,Jiang ShangZuo,Xia Tianhao,Xiao Danyang,Li Yan,Hou Yanbing,Zhang Jin Zhong,Pu Ying-Chih
Ti 2 C quantum dots (QDs) with rich surface functional groups have been synthesized using a hydrothermal method, and used to detect tetracycline (Tc) based on enhanced fluorescence. The interaction between the surface functional groups of Ti 2 C QDs and Tc enhanced the fluorescence of Tc at 514 nm, which is used to detect Tc quickly and accurately. Under optimal conditions, the fluorescence intensity was linear to the concentration of Tc in the range of 50.0–30.0 μM, with a detection limit of 21.6 nM. Furthermore, the Tc-Ti 2 C QDs detection system was evaluated for detection of Tc in milk and artificial urine. This study demonstrates a new and simple strategy for Tc detection, which is important for food safety and human health.
研究领域:
分析化学
·
环境科学
·
材料科学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 32
·16748-16756
·
IF 8.867
Mengmeng Shao,Yangfan Shao,Jianwei Chai,Yuanju Qu,Mingyang Yang,Zeli Wang,Ming Yang,Weng Fai Ip,Chi Tat Kwok,Xingqiang Shi,Zhouguang Lu,Shijie Wang,Xuesen Wang,Hui Pan
Photocatalytic water splitting is an environmentally friendly technique for hydrogen production. In this work, we report a novel photocatalyst consisting of two-dimensional (2D) titanium carbide (Ti2C) and graphitic carbon nitride (g-C3N4). We observe substantially enhanced water splitting activities due to the efficient synergistic interaction between Ti2C and g-C3N4. Optimal properties are achieved in the g-C3N4 with a loading of 0.4 wt% Ti2C with a hydrogen production rate of 47.5 μmol h−1, which is 14.4 times as much as that in the case using pure g-C3N4, and it even outperforms Pt-loaded g-C3N4. We further show that the Ti2C/g-C3N4 has high stability and good reproducibility. We expect that the Ti2C/g-C3N4 can be a photocatalyst for large scale applications because both Ti2C and g-C3N4 are low-cost, abundant, and nontoxic.
研究领域:
材料科学
·
化学工程
·
可再生能源
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 12
·6964-6974
·
IF 2.047
Geng Zhibin,Liu Hong,Xiong Wei
Polymer/conductor composites are used in energy storage capacitors; however, they exhibit high interface leakage currents, causing low breakdown strength. Here, a ternary-blend strategy was used to synthesize polyvinyl chloride (PVC)/titanium carbide transition-metal carbide two-dimensional nanolayered material (Ti 2 C MXene)/diamond composites using solution casting. The PVC matrix exhibited low polarity and high insulation, while the Ti 2 C MXene and diamond fillers exhibited high conductivities and ultrahigh insulation properties, respectively. Overall, the PVC/Ti 2 C/diamond ternary composites exhibited better electrical properties than the PVC/Ti 2 C binary composites. In the ternary composites, PVC/Ti 2 C interface polarization caused high dielectric constants, while low leakage currents induced by diamond caused low dielectric losses and high breakdown strength. The optimum-composition (12 wt.% Ti 2 C and 4 wt.% diamond) ternary composite exhibited a high dielectric constant (~153 at 100 Hz), low dielectric loss (~0.14 at 100 Hz), low conductivity (~1.4 × 10 −6 S m −1 at 100 Hz), and high breakdown strength (~312 MV m −1 under a direct current field). This study indicates a synergistic effect between Ti 2 C MXene and diamond in the composite dielectrics, and could guide the fabrication of dielectric films for capacitors. Graphical Abstract
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
Tungsten
·
2024
·
IF 5.6
Chen Hao,Wang Ya-Qin,Zhang Dong-Ting,Zhao Bei,Li Min-Peng,Li Chen-Yang,Xu Tian-Peng,Liu Mao-Cheng
MXenes obtained significant attention in the field of energy storage devices due to their characteristic layered structure, modifiable surface functional groups, large electrochemically active surface, and regulable interlayer spacing. Nonetheless, the self-restacking and sluggish ions diffusion kinetics performance of MXenes during the alkali metal ions insertion/extraction process severely impedes their cycle stability and rate capability. This paper proposes an aniline molecule welding strategy for welding p-phenylenediamine (PPDA) into the interlayers of Ti 2 C through a dehydration condensation reaction. The welded PPDA molecules can contribute pillar effect to the layered structure of Ti 2 C. The pillar effect effectively maintains the structural stability during the sodium ions insertion/extraction process and effectively expands the interlayer spacing of Ti 2 C from 1.16 to 1.38 nm, thereby enhancing ions diffusion kinetics performance and improving the long-term cycle stability. The Ti 2 C-PPDA demonstrates outstanding Na + storage capability, exhibiting a specific capacity of 100.2 mAh·g −1 at a current density of 0.1 A·g −1 over 960 cycles and delivering a remarkable rate capability 81.2 mAh·g −1 at a current density of 5 A·g −1 . The study demonstrates that expanding interlayer spacing is a promising strategy to enhance the Na + storage capacity and improve long-term cycling stability, which provides significant guidance for the design of two-dimensional Na + storage materials with high-rate capability and cycle stability.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Po Jin,Ya-nan Zhang,Zhong Li,Wanlu Zheng,Liangliang Cheng,Like Li,Xuegang Li,Yong Zhao
Background The concentration of cytochrome C is demonstrated to be an effective indicator of the microbial corrosion strength of metals. Traditional cytochrome C sensor can detect cytochrome C with a low detection limit, but their use is limited by their high cost, cumbersome operation, and susceptibility to malignant environments. In addition, studies on the monitoring of cytochrome C in the field of microbial corrosion has still not been carried out. Therefore, there is a need for a highly sensitive, selective, low-cost, anti-interference, and stable cytochrome C sensor with online monitoring and remote sensing capabilities for in-situ measurement of microbial corrosion strength. Results This paper proposed a highly sensitive label-free fiber-optic sensor based on Mach-Zehnder interferometer (MZI) for in-situ measurement of the microbial corrosion marker cytochrome C. Two-dimensional Ti 2 C-MXene material is uniformly immobilized onto the surface of the sensing area to improve the sensitivity, hydrophilicity , and specific surface area of the sensing area, as well as to facilitate the immobilization of specific sensitive materials. The cytochrome C antibody is modified on the surface of Ti 2 C-MXene to specifically recognize cytochrome C, whose concentration variation can be measured by monitoring the spectral shift of MZI sensor. Results demonstrate a measurement sensitivity of 1.428 nm/μM for cytochrome C concentrations ranging from 0 to 7.04 μM. The detection limit of the sensor is calculated to be 0.392 μM with remarkable performance, including selectivity , stability, and reliability. Besides, the measurement result of the proposed sensor in real microbial corrosive environment is consistent with that of the ideal environment. Significance and novelty This is the first instance of achieving in-situ and label-free measurement of cytochrome C by using a fiber-optic MZI sensor, which undoubtedly provides a feasible solution for the effective monitoring of microbial metal corrosion in the environment.
研究领域:
生物化学
·
材料科学
·
传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yuchen Liu,Qi Tang,Mao Xu,Jie Ren,Chan Guo,Cheng Chen,Wenjing Geng,Weiwei Lei,Xiaoli Zhao,Dan Liu
MXenes family has attracted intense interests owing to their unique physical and chemical features. However, current preparation approaches for MXenes holding complex procedures and strict conditions, time-consuming, as well as low production hinder their further potential applications. Here, we developed an efficient one-step mechanical exfoliation (ECO-ME) method for the rapid and high-yielding of Ti 3 C 2 , which offers a dramatic reduction in preparation time compared to conventional methods. The ECO-ME synthetic pathway was then demonstrated as a universal method for Ti 2 C. The ECO-ME MXenes formed stable colloids in aqueous and dispersed well in seven organic solvents for over 30 days, respectively. In addition, the prepared MXene showed the ability to load several nanoparticles at room temperature for 100% reduction of p -nitrophenol in around 10 min. This study, therefore, offers an efficient, energy conservation and universal method for the preparation of Ti-based MXenes, endowing MXenes with broad application prospects.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaolong Lu,Zhiwei Xu,Yi Shi,Qi Wang,Jialu Jia,Nan Sun,Bijun Fang,Ningyi Yuan,Jianning Ding
Structure engineering gives rise to tremendous opportunities for creating materials with marvelous morphologies and properties. Limited by the unique etching preparation method and vulnerable resistance to oxidation , structure engineering of MXenes, especially, mesoporous morphology construction, remains an obstacle. Here, we put forward a facile strategy to fabricate mesoporous MXene nanosheets by microexplosion process assisted uneven sheets exfoliation and quantum dots detaching, with left structure voids acting as mesopores. The universality of proposed strategy for different MXenes, including Ti 3 C 2 , Nb 2 C and Ti 2 C, was also testified. As a concept of proof, the distinct mesostructures provide abundant active sites and improve ion diffusion kinetics, thus boosting the energy storage performance of Ti 3 C 2 MXenes. This work not only sheds new light to the fabrication of mesoporous MXenes, but also demonstrates performance optimization through structure engineering.
研究领域:
材料科学
·
纳米技术
·
能源存储
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Xue-Feng Zhao,Cheng-Zhou Hang,Hong-Liang Lu,Ke Xu,Hao Zhang,Fan Yang,Ru-Guang Ma,Jia-Cheng Wang,David Wei Zhang
A flexible skin-like tactile sensor as one of the key components in the next generation for robots should have the ability to perform real-time feedback, continuous measurement, and quantization of weak target signals in the real applications (e.g. intelligent Braille recognition). Herein, inspired by human skin, a novel flexible piezoresistive tactile sensor with high sensitivity and linearity is designed and fabricated. It is composed of three main parts including the random Gaussian distribution (RGD) spinosum on polydimethylsiloxane as the top substrate, the multilayer Ti 2 C-MXene film as the intermediate conductive filler , and the commercial polyimide-based interdigital electrodes as the bottom substrate. The working mechanism of RGD spinosum and Ti 2 C-MXene films in the flexible tactile sensor are clarified by COMSOL Multiphysics simulations and density functional theory calculations, respectively. The assembled sensor demonstrates ultrahigh sensitivity, large linearity, excellent cycling stability, and fast response speed in the milliseconds. Moreover, the development of advanced neural network technology makes it possible to realize intelligent skin-like sensor. In this study, it is the first time to realize real-time Braille effective intelligent recognition by such a flexible skin-like tactile sensor with the random decision forests algorithm. This study is of great significance to solve the social and public issues of information exchange for the vision-impaired or even the blind that has been highly concerned in recent years.
研究领域:
材料科学
·
生物医学工程
·
人工智能
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yi Liu,Qiqi Jia,Yao Yan,Ningkai Yuan,Wei Luo,Xiaoyan Yuan,Lei Wang,Shouwu Guo
Ti 2 AlC can be used as a microwave absorbent due to its good electrical conductivity. However, Ti 2 AlC powders synthesized using conventional solid phase reaction show low reflection loss (RL) and narrow effective absorption width (EAB), which greatly limits its application in the field of microwave absorption. Herein, porous lamellar Ti 2 AlC powders were firstly synthesized in NaCl/KCl molten salt using Ti powders, Al powders, and starch as reaction precursors, and then they were selectively etched with Lewis acid molten salt (CuCl 2 ) to prepare Ti 2 AlC/Cu/Ti 2 C hybrids. The results indicated that when the mass fraction of porous lamellar Ti 2 AlC powder in paraffin was 40 %, the maximum RL and EAB were −44.15 dB and 2.68 GHz, respectively. After Lewis acid molten salt etching, the RL and EAB of Ti 2 AlC/Cu/Ti 2 C hybrids increased to −54.88 dB and 4.48 GHz, respectively. The improvement of microwave absorption property could be attributed to the enhancement of polarization and conductivity losses caused by the formation of Ti 2 C MXene and copper nanoparticles. This study provides a simple way to tune the microstructure and microwave absorption capability of Ti 2 AlC.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Danyang Xiao,Dejia Hu,Yifeng Shi,Bufeng Liang,Muhammad Usman,Yaqi Sang,Shiqi Mao,Yan Li
A high-performance Ti₂C QDs-TMB sensor was developed for sensitive, interference-resistant TAC detection. • The dual-crosslinked hydrogel patch demonstrates excellent wearability and biocompatibility. • A smartphone-integrated platform enables real-time, visual analysis of TAC in sweat. Monitoring total antioxidant capacity over time is crucial for understanding the progression of oxidative stress in chronic diseases. However, traditional single-point measurements provide only static information and fail to capture dynamic fluctuations and long-term trends. Existing TAC methods rely on specialized equipment and lack biointegration, severely limiting their widespread application in both clinical and home settings. Against this background, this study developed a novel, highly sensitive, and anti-interference TAC detection method, which was based on the catalytic oxidation properties of Ti 2 C MXene quantum dots (Ti 2 C QDs) as the core response mechanism. By employing a two-step cross-linking mechanism, the Ti₂C QDs-TMB colorimetric system was encapsulated within a sodium alginate hydrogel to fabricate a flexible, visual sensor patch (TQ-SA). Using a self-developed smartphone application to analyze patch color changes, the TAC (expressed as ascorbic acid equivalents) in artificial sweat was quantitatively measured in real time, with a detection limit of 2.745 μM. This work leverages the high catalytic activity of MXene quantum dots and the portability of mobile devices to provide a viable research strategy for dynamic antioxidant wearable sensor technology. Ti₂C MXene quantum dots are synergistically integrated into a dual-crosslinked sodium alginate hydrogel matrix, yielding a highly flexible and wearable sensing platform. By leveraging smartphone-based image acquisition and digital colorimetric analysis, the patch facilitates sensitive, real-time quantification of total antioxidant capacity (TAC). Download: Download high-res image (160KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Longkai Pan,Hui Mei,Hongxia Liu,Haixi Pan,Xing Zhao,Zhipeng Jin,Gangqiang Zhu
Loading co-catalyst is one of the essential ways to strengthen the performance of photocatalyst . Here, a novel non-precious metal co-catalyst Ti 2 C/TiO 2 was successfully synthesized and Zn 0.5 Cd 0.5 S nanoparticle grown on the surface of Ti 2 C/TiO 2 equably. In our work, 0.01 g photocatalysts were used in photocatalytic activity measurement. Zn 0.5 Cd 0.5 S/Ti 2 C/TiO 2 composite (2 wt% Ti 2 C/TiO 2 ) exhibited the highest photocatalytic activity and the H 2 yield is 32.57 mmol/g −1 /h −1 under visible light irradiation. The photoelectrochemical results reveal that Ti 2 C/TiO 2 could improve the separation of the photo-induced carriers in Zn 0.5 Cd 0.5 S/Ti 2 C/TiO 2 heterojunction . And DFT calculations demonstrate that the Gibbs free energy of oxygen-terminated Ti 2 C and TiO 2 are much lower than that of Zn 0.5 Cd 0.5 S. Therefore, the Ti 2 C/TiO 2 has an active impact on improving the H 2 production of Zn 0.5 Cd 0.5 S. This study provides a new way to explore the application of inexpensive co-catalysts on a large scale.
研究领域:
材料科学
·
化学
·
纳米技术
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）