JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Yi Sun,Ruowei Yi,Yinchao Zhao,Chenguang Liu,Yudan Yuan,Xianwei Geng,Weixuan Li,Zhichen Feng,Ivona Mitrovic,Li Yang,Cezhou Zhao
A facile strategy involving only liquid mixing, drying, and annealing processes has been designed to fabricate a new MXene-based material containing nitrogen-doped carbon nanotubes grown on the nitrogen-modified titanium carbides (NCMX). During the thermal treatment, the nitrogen doping is dually achieved in MXene nanosheets and carbon nanotubes while the in-situ growth of carbon nanotubes occurs. The NCMX electrode exhibits the well-designed structure with the promoted specific surface area and specific capacitance. More attractively, the resultant NCMX-4 material shows extraordinary improved electrochemical capacitances of 299.52 F g −1 at the scan rate of 2 mV s −1 in the 3 M H 2 SO 4 electrolyte, which is remarkably more superior than those of the pure un-doped one (74.98 F g −1 ). It delivers an excellent capacitance retention capability of 84.2% after 10,000 cycles. Our results highlight that the strategy of fabricating novel NCMX materials here can be readily applied to a large industrial scale for improving the pseudocapacitance of supercapacitors .
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Ying He,Xitong Zhou,Liya Zhou,Xiaoning Zhang,Li Ma,Yanjun Jiang,Jing Gao
Prussian blue (PB)–Ti3C2Tx hybrid composites (PB@Ti3C2Tx) with peroxidase-like activity were prepared via a mild and green approach, in which Ti3C2Tx acted as a reducing agent, and the multilayer 2D nanostructure could effectively keep the PB nanoparticles away from aggregation. We fabricated a facile colorimetric biosensor for H2O2 detection to demonstrate the peroxidase-like activity of PB@Ti3C2Tx, and the results indicated favorable linearity of H2O2. The KMapp value of PB@Ti3C2Tx for TMB and H2O2 was 0.0134 mM and 0.162 mM, respectively, which was better than that of horseradish peroxidase (HRP). Moreover, we also fabricated a biosensor by immobilizing acetylcholinesterase (AChE) on the PB@Ti3C2Tx-modified electrode. PB@Ti3C2Tx not only has good biocompatibility for AChE but also can obtain a detectable signal at lower applied potential (from 0.73 to 0.2 V). A good linearity of malathion was obtained in the range from 1.0 × 10–15 to 1.0 × 10–9 M with a detection limit of 1.3 × 10–16 M.
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Journal of Physical Chemistry C
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2020
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IF 4.189
Zilong Zhang,Yaoyi He,Yangyang Lv,Lei Zhang,Xiqiao Chen,Zhuang Wu,Yanhong Zou
In this paper, two-dimensional Ti3C2Tx-MXenes with abundant defects and functional groups as well as appropriate conductivity were successfully synthesized by acid treatment at room temperature. The relationship between the surface structure and its electromagnetic wave absorption ability was systematically studied by changing etching time and heat treatment. Benefiting from the conduction loss and strong polarization relaxation around the abundant interface areas in the two-dimensional layered structure, the Ti3C2Tx Mxene composite possesses excellent electromagnetic absorption performance. Remarkably, optimized Ti3C2Tx exhibits extremely strong absorption with a minimum reflection coefficient of −65 dB, and the qualified absorbing bandwidth is up to 5 GHz. Furthermore, the ultrathin matching thickness of the Ti3C2Tx Mxene composite is 1.4 mm. The prominent absorbing performance outperforms most recently reported two-dimensional carbon materials for microwave absorption.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Ningmin Duan,Zhenyu Shi,Jilai Wang,Chengpeng Zhang,Jianren Xi,Xiaotao Yang,Guilong Wang
The development of flexible electronics has placed higher demands on electromagnetic interference (EMI) shielding materials, especially in terms of mechanical properties. Herein, a novel composite with excellent mechanical and EMI shielding properties was developed. The electrohydrodynamic atomization deposition approach was used to deposit Ti 3 C 2 T x MXene and graphene oxide (GO) nanosheets on carbon fiber fabric (CFf) surface, then they were assembled layer by layer with thermoplastic polyurethane (TPU) and thermoformed at high temperature to obtain MG/f-CFf/TPU composite. When the MXene/GO content increases, the mechanical performance of the composite is improved, mainly owing to the formation of chemical bonds and the presence of mechanical interlocking and van der Waals forces . Specifically, the tensile strength and interlaminar shear strength of the composite reach 140.98 MPa and 54.67 MPa, increasing by 72.45 % and 52.92 %, respectively. Benefitting from the unique lamellar structure , the maximum EMI-SE of MG/f-CFf/TPU composite is 38.29 dB. Besides, the MG/f-CFf/TPU composite also displays outstanding EMI-SE stability after 3000 times folding cycles. The flexible MG/f-CFf/TPU composite may provide more guidelines for the design of next-generation flexible EMI shielding materials.
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NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 48
·期 6
·2496-2504
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IF 3.3
Jiao Wu,Bingbing Chen,Aihu Feng,Kun Liu,Yun Yu
Capacitive deionization is a promising solution for freshwater production with Ti3C2Tx emerging as a momentous electrode material. Here, highly porous 3D nitrogen-doped Ti3C2Tx (3D-N-Ti3C2Tx) is developed by using electropositive melamine to electrostatically induce electronegative Ti3C2Tx nanosheets to be reconstructed to alleviate the severe stacking problem of Ti3C2Tx layers. 3D-N-Ti3C2Tx has a large specific surface area (129.48 m2 g−1) and pore volume (0.372 cm3 g−1), exposing numerous ion adsorption sites. Also, 3D-N-Ti3C2Tx achieves nitrogen doping, which greatly improves the hydrophilicity and electrical conductivity. With the combined advantages of a three-dimensional structure and nitrogen doping, 3D-N-Ti3C2Tx achieves a specific capacitance of 101.9 F g−1 in 1 mol L−1 NaCl solution and demonstrates fantastic desalination performance with a high desalination capacity of 31.51 mg g−1, surpassing those of the majority of reported Ti3C2Tx electrodes, and outstanding desalination cycling stability in 500 mg L−1 NaCl solution at 1.2 V. This work significantly contributes to the advancement of Ti3C2Tx electrode material in CDI.
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CERAMICS INTERNATIONAL
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2023
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IF 5.2
Yaru Hou,Fanyong Yan,Xinyi Bai,Xin Wei,Liang Chen,Yang Fu
Ti 3 C 2 T x MXene has demonstrated well-established sensitivity in electrochemical sensing but is susceptible to oxidation . Nitrogen-sulfur doped carbon dots (N, S-CDs) were functionalized on Ti 3 C 2 T x MXene nanosheets via a surface modification strategy, leading to significant enhancement in the performance of Ti 3 C 2 T x MXene. The incorporation of N, S-CDs into Ti 3 C 2 T x MXene nanosheets effectively prevents the aggregation of Ti 3 C 2 T x MXene flakes, resulting in improvement of the interlayer spacing to 1.578 nm and a threefold expansion of the specific surface area. Furthermore, the N, S-CDs contribute to increase the effective active surface area of the Ti 3 C 2 T x MXene electrode, facilitating accelerated the electron transfer rates and providing additional active sites. On this basis, a galvanic sensor for dopamine (DA) detection was attained through loading N, S-CDs/Ti 3 C 2 T x on glassy carbon electrodes. The optimized sensor achieved a linear detection range of 1 μM–1000 μM for DA, with a detection limit of 0.91 μM (S/N = 3). This work presents a promising approach for the utilization of chemically stable Ti 3 C 2 T x MXene and MXene-based sensors, offering a new avenue for quantitative detection of DA that holds potential for application in real sample analysis.
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SURFACE & COATINGS TECHNOLOGY
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2023
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IF 5.4
Chuanpeng Li,Yu Liu,Qiangliang Yu,Shuang Sun,Siyu Liu,Chen Zhao,Xingwei Wang,Shuangshuang Yang,Bo Yu,Meirong Cai,Feng Zhou,Weimin Liu
In this study, two-dimensional transition metal carbides and carbon nitride (MXene) and mesoporous silica nanoparticles (SiO 2 ) loaded with corrosion inhibitor 1-(3-((N-n-butyl) aminecarboxamido) propyl)-3-hexadecyl imidazolidin bromide (M16) were used to prepare a M16@MXene-SiO 2 nanocomposite with good anti-corrosion and wear resistance. The structure and composition of the nanocomposites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). The synthesized M16@MXene-SiO 2 nanocomposite was then added to an epoxy coating on Q235 carbon steel. The uniform distribution of M16@MXene-SiO 2 in the coating was confirmed by SEM and atomic force microscopy (AFM). The electrochemical impedance spectroscopy (EIS) test showed that the corrosion resistance of epoxy coating was the best when the addition amount of M16@MXene-SiO 2 was 5 wt%, and its electrochemical impedance could reach 5.98 × 10 9 Ω∙cm 2 . After 144 h immersion, the coating resistance (R c ) of the epoxy coating decreased to 3.88 × 10 3 Ω∙cm 2 , and that of the epoxy coating with M16@MXene-SiO 2 increased to 1.01 × 10 4 Ω∙cm 2 . The corrosion inhibition efficiency of M16@MXene-SiO 2 was tested by potentiodynamic polarization. After immersion for 24 h, the corrosion current density (I corr ) of the epoxy coating was 2.23 × 10 −7 A∙cm −2 , which reduced to 4.38 × 10 −8 A∙cm −2 after adding M16@MXene-SiO 2 and the corrosion inhibition efficiency increased by 80.36 %. In addition, the wear resistance of the epoxy coating was tested by reciprocating friction experiment. The friction coefficient of the epoxy coating decreased from 0.44 to 0.12 after adding 5 wt% M16@MXene-SiO 2 . The results showed that the composite coating had excellent corrosion resistance, self-healing properties and wear resistance. The improvement in corrosion could be explained by the filling of coating defects with MXene-SiO 2 and the formation of corrosion inhibitor films. The improvement of friction performance was mainly attributed to the friction transfer film formed by MXene-SiO 2 and M16.
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ACS Applied Nano Materials
·
2023
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IF 5.9
Xinxin Li,Boxin Zhao,Wenjing Qin,Min Yang,Lei Feng,Changshun Gu,Zhenhao Tian,Hengchao Liu,Xiujie Guo,Yan Zhang,Shougen Yin
Developing multifunctional electronic fabrics with sensing capabilities, electromagnetic interference (EMI) shielding, and Joule heating performance holds great significance for health monitoring and medical protection. However, most fabrics struggle to combine multiple functions and optimize them simultaneously. For example, achieving both high sensitivity and a wide detection range in sensing devices remains a challenge. In this paper, we present a multidimensional composite structure comprising MXene Ti3C2Tx nano lamellar, self-assembled lotus leaf-like MXene/EGaIn and carbon nanotubes (CNTs) assembled on the surface of thermoplastic polyurethane to create a multifunctional MXene EGaIn/MXene CNT fabric (MEMC fabric). The multidimensional materials form a stable conductive network under tension. As a strain sensor, the MEMC fabric exhibits a large sensing range (0–360%) and ultra-high sensitivity (GF ∼ 114,700), making it suitable for artificial eardrum research. Additionally, MEMC demonstrates excellent EMI shielding effect (∼73 dB) and maintains good EMI shielding performance under tensile conditions. The fabric also showcases outstanding Joule heating performance (low voltage drive ∼2 V, fast heating time ∼13 s, and high heating stability ∼4000 s). This paper also demonstrates the multifunctional combination of MEMC fabrics, achieving simultaneous sensing, EMI shielding, and Joule heating functions under stretching. This work offers a forward-looking approach for constructing multifunctional composite fabrics, and the resulting MEMC composite materials hold potential applications in portable electronic devices and defense industries.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yuxiao Yang,Xiaolei Liu,Jianyun Zhao,Xin Jia,Zhiwei Li,Chunhui Xiao,Jiuhong Wang,Yinhuan Li,Jin Liang,Shujiang Ding,Wei Yu
Ti 3 C 2 T x can dissipate energy well due to its high conductivity, but at the expense of severe electromagnetic (EM) wave reflection, which is exacerbated by self-stacking. Despite various attempts to tackle this problem, the excessive isolation of Ti 3 C 2 T x and massive high-density inorganic components render these designs unfavorable for lightweight and broadband absorption. Meanwhile, improvements in absorption performance are related to active surface and polarization interface expansion, as well as conductive path reconstruction, but the main contributing factor remains unknown. In this work, the dual-shell structured Ti 3 C 2 T x @CNTs/Ni-HS (hollow sphere) composites are fabricated. This structure creates a confined dissipation cage, where the CNTs/Ni shell confines the electron transfer among spheres and prevents self-restacking and the tightly contacted Ti 3 C 2 T x shell forms an uninterrupted conductive path for effective dissipation. Therefore, Ti 3 C 2 T x @CNTs/Ni-HS-1 exhibits a broad effective absorption band of 6.1 GHz and a minimum reflection loss of −64.6 dB at a mass ratio of only 15 wt%. Importantly, when hollow structure cracks, although large active surface and polarizable interface remain, the absorption capacity of fragmented Ti 3 C 2 T x @CNTs/Ni-HS-1 deteriorates, indicating rational conductive path in confined dissipation cage is the main factor in achieving excellent performance. This work provides new insight for the rational design of high-performance absorbers.
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CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Xuemei Yao,Ziting Qi,Peizhi Yang,Jiabao Li,Wen Yang
Simultaneously manipulating the interfacial energetics to boost charge extraction and passivate defective nanostructure to suppress unwanted non-radiative recombination is of great importance to increase the power conversion efficiency and long-term stability of carbon-based perovskite solar cells (C-PSCs), which requires rational design of interfacial regulator. Herein, a novel two-dimensional (2D) Ti 3 C 2 T x MXene patched graphene oxide (GO) heterojunction is fabricated as perovskite film plaster to improve the overall photovoltaic performance of C-PSCs. Arising from the nucleophilic substitution and dehydration reaction between MXene (Ti-O - ) and GO (-C=OH + ), the negative-charge-centered GO induced by the oxygen-containing functional groups is healed. As a result, this heterojunction not only aligns the perovskite/carbon energy-level and provides a channel for carrier transport, but also effectively solidifies the soft perovskite lattice, universally promoting the efficiencies up to 11.07% for inorganic CsPbIBr 2 C-PSC and 15.04% for CsPbI 2 Br C-PSC with significantly improved stability.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Guandan Lu,Xuteng Xing,Jia Zhang,Xiaoyang Xu,Xiangjing Zhang,Haining Liu,Jiye Fan,Bingzhu Zhang
The cobalt ion chelated Ti 3 C 2 T x MXene (Co@Ti 3 C 2 T x MXene) composite is designed/prepared by alkalizing quasi-monolayer Ti 3 C 2 T x MXene supernatant into -OH rich sample, followed by cobalt ion chelation, to achieve the high loading amount of Co element. The optimized Co@Ti 3 C 2 T x MXene can display the high specific capacity of 48 mAh/g at the current density of 1 A/g, much higher than Ti 3 C 2 T x MXene, which is attributed to the highly dispersed quasi-monolayer structure, additional Faradaic redox reaction of Co (Ⅱ/Ш), and enhanced conductivity from Co element. In terms of practical application, the assembled Co@Ti 3 C 2 T x MXene//active carbon (AC) asymmetric supercapacitor device also exhibits the high energy density of 19 Wh/kg, and good cycle stability. The alkali modification/metal ion chelation is a simple and effective strategy to inhibit the stack and enhance electrochemical performances for Ti 3 C 2 T x MXene.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Zhihui Hu,Huanmin Liu,Ningxin Kang,Kangle Lv,Qin Li
Using solvothermal methods to in situ oxidize two-dimensional titanium carbide (Ti 3 C 2 T x ) MXene into TiO 2 nanocrystals offered an effective strategy to construct highly efficient TiO 2 /Ti 3 C 2 T x heterojunctions for photocatalytic applications. Nevertheless, the effect of the chosen solvent on the Ti 3 C 2 T x oxidation and the product's performance was often neglected. Herein, isopropanol (ISO), ethanol (EtOH), ethylene glycol (EG), dimethyl sulphoxide (DMSO) and deionized water (Water) were taken as the representative solvents to prepare TiO 2 /Ti 3 C 2 T x composites by one-step solvothermal method for photocatalytic NO emission. It was the large polarity, dielectric constant and surface tension of the solvents that offered Ti 3 C 2 T x with good dispersibility and high oxidation degree during the solvothermal process. More importantly, the solvothermal treatment of Ti 3 C 2 T x in DMSO could promote the formation of TiO 2 nanoparticles with obviously higher crystallinity and more surface oxygen vacancies than those in EG, EtOH and ISO. Therefore, the photocatalytic NO oxidation efficiency of the samples within 30-min irradiation showed a descending order of TT-DMSO (46.9%), TT-Water (42.2%), TT-EG (32.3%), TT-EtOH (26.7%), and TT-ISO (19.9%). This work highlighted the significance of oxidation environment for Ti 3 C 2 T x , which could bring about some new but necessary consideration on the processing technique of MXene families for their future practical applications.
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