JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Zhen Zhang,Jun Zhou,Wei Jiang,Kai Yang,Tong Wang,Changjian Hu,Limei Pan,Qian Li,Jian Yang
Recently, as a new breakthrough for lithium-ion storage anode materials , transition metal vanadates , such as Fe 2 VO 4 , have attracted much attention, which, however, still suffer from slow electrochemical kinetics and substantial volume expansion. Hybrid with high conductivity materials is an effective route to deal with these issues. Herein, in situ synthesis of Fe 2 VO 4 @Ti 3 C 2 T x composites with porous sandwich structure by co-precipitation-calcination process was reported. Ultrafine Fe 2 VO 4 nanoparticles (10–15 nm) in situ grew and was anchored on Ti 3 C 2 T x nanosheets , which effectively inhibits both the grain growth for Fe 2 VO 4 and stacking for Ti 3 C 2 T x , thus facilitating the electrochemical kinetics and alleviating the volume change of Fe 2 VO 4 to maintain the integrated structure during the cycling process. As a result, Fe 2 VO 4 @Ti 3 C 2 T x anode shows high Li + diffusion coefficient (2.72 × 10 −11 cm 2 s −1 ) and pseudocapacitive charge storage mechanism (capacitive charge storage contribution 70.85–84.80 % at 0.2–1.0 mV s −1 ), which guarantee rapid charging and discharging capability. Consequently, outstanding rate performance (1012–595 mAh g −1 at 0.2–3.0 A g −1 ) and superior cycling capability (663 and 416 mAh g −1 at 1.0 A g −1 for 200 cycles and 2.0 A g −1 for 500 cycles, with the average capacity attrition rate of 0.059 % and 0.053 %, respectively), were achieved, which render Fe 2 VO 4 @Ti 3 C 2 T x composites important potential for lithium-ion storage.
研究领域:
材料科学
·
电化学
·
纳米科技
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能源存储
·
无机非金属材料
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Zhihua Zhao,Yao Wang,Wei Chen,Guixin Jin,Qingsheng Shi,Baocang Zhou,Yafang Pan,Lan Wu,Zhigang Shao
Ammonia (NH 3 ) is one of the most detrimental environmental pollutants emanating from various industrial processes. Therefore, the preparation of ammonia sensors with excellent performance holds the utmost significance, ensuring environmental quality and human health. In this study, through the self-redox reaction between Ti 3 C 2 T x and Ag + , Ag nanoparticles (NPs) loaded Ti 3 C 2 T x MXene (Ag@MXene) were directly prepared. The as-synthesized materials were conducted a comprehensive investigation into their gas-sensing properties and were characterized utilizing analytical techniques such as XRD (X-ray Diffraction), XPS (X-ray Photoelectron Spectroscopy), SEM (Scanning Electron Microscope), and EDS (Energy-Dispersive X-ray Spectroscopy). According to the experimental findings, the Ag@MXene sensor responds to NH 3 remarkably well at room temperature, about 7 times more effectively than pure MXene performs under the same condition. Density functional theory (DFT) investigations were additionally carried out to further clarify the gas-sensing mechanisms. The technique for creating high-precision and room-temperature gas sensors is described in this paper as a workable strategy.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Yong Zhang,Haotian Xiong,Qingdong Chen,Mingcong Tang,Zijian Wang,Jingdu Bian,Dongzhi Zhang
In the automotive industry, improper handling and excessively high temperatures can lead to the failure of lithium-ion batteries. Early failure of lithium batteries can produce trace amounts of gases, such as carbon monoxide (CO) and carbon dioxide (CO2). In this study, hollow spherical nickel oxide (NiO) was prepared using a carbon sphere template method and then combined with Ti3C2Tx (MXene). Most of the NiO hollow spheres had a diameter of about 700 nm. By variation of the ratio of MXene, a carbon monoxide sensor was fabricated, enabling the detection of CO at room temperature. The surface morphology and elemental composition of the materials were analyzed. Experimental and characterization results show that the NiO/MXene composite exhibits faster response/recovery times, higher sensitivity, and better selectivity to CO. The response time of NiO/MXene to 400 ppm of CO is only 8 s, and the recovery time is 16 s. The sensor’s sensitization mechanism was explained through first-principles calculations. This sensor can be applied in lithium battery status monitoring and fault warning systems.
研究领域:
材料科学
·
传感器技术
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Lu Tang,Kechen Zhou,Huiyu Su,Jiahong Tang,Qirui Wu,Lingfei Luo,Xiang Guo,Dawen Zeng
Detecting nitrogen dioxide (NO2) at room temperature (RT) is crucial for advancing environmental monitoring technologies, enabling efficient and practical air quality assessment. Two-dimensional (2D) MXene nanomaterials, recognized for their large specific surface area (SSA), abundant functional groups, and tunable electrical properties, have attracted considerable attention as promising candidates for room temperature gas-sensing applications. However, despite their potential, challenges, such as low gas adsorption efficiency, limited sensitivity, and poor selectivity, hinder their broader application and development, highlighting the need for further research. Here, we introduce a zero-dimensional (0D)/2D heterojunction gas-sensitive structure by synthesizing SnS2 quantum dot (QD)-sensitized Ti3C2Tx MXene nanocomposites via a hydrothermal method. The carefully designed gas sensor exhibits a significantly enhanced response value (RV) of 5.83% for 10 ppm of NO2 and a low detection limit of 500 ppb at RT, achieving an RV that is 5.8 times higher than that of pure Ti3C2Tx. Additionally, the sensor demonstrates high sensitivity (0.76 ppm–1 in the 0.5–5 ppm range), excellent selectivity, and outstanding stability, with a performance degradation of only 3.2% over 4 weeks. The exceptional performance arises from the synergistic effects of the quantum confinement properties of SnS2 QDs and the superior conductivity of Ti3C2Tx, which together provide abundant active sites for gas adsorption and facilitate efficient charge transfer pathways. Furthermore, the formation of the heterojunction modulates the resistance, enhancing room temperature sensing capabilities. The synthesized nanomaterials offer significant potential for advancing the design of heterostructures that integrate 0D QDs with 2D nanomaterials, paving the way for highly efficient NO2 detection at RT. Moreover, maintaining an optimal operating temperature further enhances the accuracy and reliability of real-time NO2 monitoring systems.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Caiqin Wang,Tingting Zhou,Cheng Qian,Lili Chen,Liyuan Hao,Shumeng Fu,Bingguo Feng,Xiaofei Yang
Ti 3 C 2 T x MXene nanonets (MNNs) with 3D fibrous architecture were obtained from Ti 3 C 2 T x MXene nanoplates (MNPs) via surface modifying of alkalization in concentrated KOH solution, which was further combined with carbon nanotube and used as catalyst supports for Pt nanoparticles. By controlling the treatment time of alkalization, the lamellar surface of MNPs was getting into fibration in different extent. The catalytic performances toward hydrogen evolution reaction (HER) of a series of Pt-loaded MNNs catalysts were investigated, in which 1 %Pt-MNNs-9 composite catalyst presented the best hydrogen evolution performance. In detail, 1 %Pt-MNNs-9 with 1 wt.% of Pt loading exhibits an overpotential of 60 mV at 10 mA·cm −2 , which is much lower than 1 % Pt-MNPs (274 mV). It also keeps stable performance for long term stability. The enhanced catalytic activity is probably due to the fact that, Ti 3 C 2 T x MNNs with 3D architecture not only possesses abundant sites to anchor Pt nanoaprticles, but also facilitates the mass and charge transfer, which are significantly beneficial to catalytic reaction. The 3D architecture MXene fibers are expected to have widespread applications including but not limited to energy storage/conversion, and catalytic fields.
研究领域:
材料科学
·
催化化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Daoyuan Zu,Haoran Song,Changping Li,Yuwei Wang,Rong Du,Rui Zhou,Wei Zhang,Shiting Pan,Yang Cai,Yongming Shen,Zhifeng Yang
Self-catalyzed decomplexation of Cu-ethylene diamine tetraacetic acid complex (Cu-EDTA) and recovery of Cu without addition of extraneous transition metals were achieved in Ti 3 C 2 T x MXene/peroxymonosulfate (Ti 3 C 2 T x /PMS) process. Free radical quenching experiments and electron spin resonance (ESR) measurements demonstrated that both hydroxyl radical (HO • ) and sulfate radical (SO 4 •- ) contributed to the degradation of Cu-EDTA. Activation of PMS by Ti 3 C 2 T x initiated Cu-EDTA decomplexation and released free Cu ions . Then, the formation of Ti-O-Cu bonds between Cu ions and Ti 3 C 2 T x accelerated the electron transfer from Ti 3 C 2 T x to Cu(Ⅱ) and triggered Cu(Ⅱ)/Cu(Ⅰ) cycle, which further enhanced PMS activation and led to the self-catalyzed decomplexation of Cu-EDTA. Simultaneous recovery of Cu was achieved due to the excellent absorption performance of negative charged Ti 3 C 2 T x towards Cu ions. This study revealed the self-catalyzed decomplexation mechanism of Cu-EDTA in the Ti 3 C 2 T x /PMS process and provided a feasible strategy for heavy metal complexes treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Yujing Chi,Yuan Xu,Chenxiang Xu,Jiming Tian,Ying Li,Boxiang Gu,Haiyan Song,Han Zhang
Selective removal of 137Cs from nuclear wastewater is still a challenge due to the issues of efficient adsorbent exploitation and high concentrations of competitive ions. In this study, two-dimensional-layered Mxene Ti3C2Tx achieved the surface alkaline modification with KOH to be used as an efficient adsorbent for Cs+ removal from model wastewater. Hydroxyl-modified Ti3C2Tx obtained improved the delamination morphology and surface structure compared with the pristine Ti3C2Tx. In addition, the F species in Ti3C2Tx were efficiently removed and the hydroxyl groups were increased after modification. The adsorption efficiency of Cs+ over the hydroxyl-modified Ti3C2Tx was significantly enhanced, being attributed to the improvements in morphology, structure, and properties. 0.05 g of an optimal adsorbent achieved 90% removal of Cs+ with 5 mg·L–1 initial concentration in 50 mL of model wastewater within 5 min at ambient temperature and neutral conditions. Hydroxyl-modified Ti3C2Tx also exhibited high adsorption selectivity for Cs+ in the presence of competitive metal ions such as K+, Na+, Mg2+, and Ca2+. The mechanism study revealed that the ion exchange between [Ti–O]−H+/Cs+ mainly contributed to Cs+ adsorption, and the complexation between the oxygen-containing groups [Ti–O] in modified Ti3C2Tx and Cs was also involved. The hydroxyl-modified Ti3C2Tx was easy to regenerate and exhibited good recyclability for Cs+ adsorption.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jingyu Song,Yongqian Shen,Guibin Zhang,Mingxuan Sun,Mengyao Han,Xueyan Du
While two-dimensional lamellar materials, specifically Ti 3 C 2 T x MXenes, have shown great promise as wave-absorbing materials, the precise design of interlayer spacing poses a persistent challenge. In this study, Ti 3 C 2 T x MXene layers with adjustable interlayer spacings were crafted using a straightforward molecular welding technique. Through the incorporation of Ni nanoparticles onto the Ti 3 C 2 T x MXene layers using a combination of simple mechanical stirring and carbonation reactions, we successfully developed Ti 3 C 2 T x MXene/Ni/C composites featuring a distinct lamellar structure. A uniform dispersion of Ni nanoparticles on the surface of the Ti 3 C 2 T x MXene nanosheets was found with some of the nanoparticles intercalated into the layers. The Ti 3 C 2 T x MXene/Ni/C composites exhibited a maximum reflection loss (RL) value of −42.3 dB at 12.3 GHz, accompanied by an impressive effective absorption bandwidth (EAB) of 5.6 GHz. This outstanding absorption performance could be attributed to various factors, including the dielectric loss of the Ti 3 C 2 T x MXene lamellae, reflections and scattering of multiphase heterostructures, the magnetic loss of the Ni nanoparticles, and their synergistic attenuation. Furthermore, Ni nanoparticles with high electrical conductivity induced vortex currents under the alternating influence of electromagnetic waves (EMWs), resulting in a substantial depletion. This study introduces an innovative approach for synthesizing Ti 3 C 2 T x MXene/Ni/C composites with tunable interlayer spacing, showing their potential for applications in microwave absorption (MA).
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Guoshuang Hua,Meng Cai,Xiaoqiang Fan,Minhao Zhu
Polyimide (PI) demonstrates exceptional thermal stability but suffers from limited wear resistance, restricting its applications in friction environments. Herein, we repot a mechanically blended Ti 3 C 2 T x MXene-PI composite coating with optimized interfacial bonding. Leveraging the exceptional mechanical properties of Ti 3 C 2 T x , the composite coating achieves remarkable performance enhancements. The experimental results reveal that the Ti 3 C 2 T x MXene-PI coating shows outstanding mechanical properties, with hardness, tensile strength, and fracture stress values of 228.7 MPa, 64.46 MPa, and 40.55 MPa, respectively. Additionally, it exhibits superior thermal stability (T g = 347.8 °C). Compared to the PI coating, the wear rate of the Ti 3 C 2 T x MXene-PI coating under low and high loads is reduced by 47.34 % and 72.03 %, respectively, and the wear width decreases by 158 μm and 209 μm. Molecular dynamics (MD) simulation results show that Ti 3 C 2 T x has a higher binding energy with PI-precursor solution (−20.4 kcal/mol). This enhancement is attributed to the robust interface interactions between the abundant functional groups on the surface of Ti 3 C 2 T x and PI, ensuring uniform dispersion of Ti 3 C 2 T x within the PI matrix and achieving effective dispersion strength. This study reveals a significant correlation between the wear resistance of Ti 3 C 2 T x -enhanced polyimide coatings and key thermal/mechanical parameters, offering new insights for the design of high-performance wear-resistant materials.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Kai Song,Abdukeyum Abdurexit,Tursun Abdiryim,Ruxangul Jamal,Xuguang Wang,Hongtao Yang,Nana Fan,Yajun Liu
The tendency of Ti 3 C 2 T x nanosheets to be stacked makes it challenging to immobilize the active material, thus limiting the performance of the storage device. Integrating two-dimensional Ti 3 C 2 T x into three-dimensional (3D) structures is considered one of the important yet challenging approaches to realize ultra-high-performance supercapacitors. In this study, we report the preparation of Ti 3 C 2 T x into a 3D network interconnection structure using the sacrificial template method, with polydopamine (PDA) serving as a coating material for encapsulation. Subsequently, the Ti 3 C 2 T x /PDA composite is combined with NiS as an electrode material. The 3D Ti 3 C 2 T x structure effectively hinders the stacking of Ti 3 C 2 T x , while the –OH groups on the surface of PDA form non-covalent interactions with the functional groups of 3D Ti 3 C 2 T x , preventing its oxidation and accelerating electron transfer. The nitrogen atom in PDA can anchor Ni-S to avoid its detachment, which leads to better electrochemical properties of the prepared composites. Ni-S/3D Ti 3 C 2 T x @PDA as an electrode material had a high specific capacitance of 281.8 mAh/g (1 A/g). The asymmetric supercapacitor using Ni-S/3D Ti 3 C 2 T x @PDA as the anode material achieved a high energy density of 35.5 W kg −1 at 1600 W kg −1 power density, and excellent cycling stability, possessing 98.83 % cycle retention and 84.98 % capacity efficiency at 3 A/g for 10,000 cycles. In summary, it can be seen that Ni-S/3D Ti 3 C 2 T x @PDA materials have great potential for development in supercapacitors.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 3
·925
·
IF 3.748
Weihua Chen,Jiancheng Tang,Peidong Cheng,Yunlong Ai,Yi Xu,Nan Ye
2D layered MXene (Ti3C2Tx) with high conductivity and pseudo-capacitance properties presents great application potential with regard to electrode materials for supercapacitors. However, the self-restacking and agglomeration phenomenon between Ti3C2Txlayers retards ion transfer and limits electrochemical performance improvement. In this study, a 3D porous structure of Ti3C2Txwas obtained by adding alkali to a Ti3C2Txcolloid, which was followed by flocculation. Alkaline-induced flocculation is simple and effective, can be completed within minutes, and provides 3D porous networks. As 3D porous network structures present larger surface areas and more active sites, ions transfer accelerates, which is crucial with regard to the improvement of the superior capacitance and rate performance of electrodes. The sample processed with KOH (K-a-Ti3C2Tx) exhibited a high capacity of approximately 300.2 F g−1at the current density of 1 A g−1. The capacitance of the samples treated with NaOH and LiOH is low. In addition, annealing is essential to further improve the capacitive performance of Ti3C2Tx. After annealing at 400 °C for 2 h in a vacuum tube furnace, the sample treated with KOH (K-A-Ti3C2Tx) exhibited an excellent specific capacitance of approximately 400.7 F g−1at a current density of 1 A g−1, which is considerably higher than that of pristine Ti3C2Tx(228.2 F g−1). Furthermore, after 5000 charge–discharge cycles, the capacitance retention rate reached 89%. This result can be attributed to annealing, which can further remove unfavourable surface groups, such as –F or –Cl, and then improve conductivity capacitance and rate performance. This study can provide an effective approach to the preparation of high-performance supercapacitor electrode materials.Keywords:Ti3C2Tx;alkaline treatment;annealing treatment;3D porous structure;supercapacitors
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Carbohydrate Polymer Technologies and Applications
·
2022
·
IF 0
Kun Hou,Hu Zhou,Ke Zhu,Chunye Xie,Simin Liu,Yingxiang He,Xingyi Zhu,Ming Wu,Tiefan Huang
Oily wastewater seriously endangers human health. Ti 3 C 2 T x MXene has attracted extensive attention as a building block for separating membranes because of its unique two-dimensional structure and excellent hydrophilicity. In this study, we constructed a superwetting Ti 3 C 2 T x MXene membrane intercalated with sodium alginate. The hydrophilic sodium alginate not only enlarged the nanochannel of the MXene membrane but also decorated the membrane surface and endowed the membrane with excellent surface superwetting properties. The underwater oil contact angle (OCA) was about 151°, indicating an extremely low adhesion between oil and membrane surface. The membrane could also separate a series of oil-water emulsions with high separation efficiency and flux. Due to its excellent underwater superoleophobicity, the membrane demonstrated outstanding antifouling property. Excellent separation performance was maintained even after separation cycles. This work provides insights into the rational use of MXene-based membranes design and demonstrates its potential in the field of membrane separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）