Energy Storage Materials
·
2023
·
IF 20.4
Jingya Yu,Chunhong Chen,Fangyi Shi,Renjie Li,Feiyang Chen,JingJing Tang,Kang Cheung Chan,Zheng-Long Xu
Aqueous zinc ion batteries are regarded one of the most promising next generation battery technologies for safe and low-cost energy storage applications . However, the inevitable dendrites growth and detrimental side reactions for Zn metal anodes in aqueous electrolytes induce short cycle life, low coulombic efficiencies, and cell failure. Here we propose to construct a MXene-porous polydopamine (MPP) interfacial layer on the Zn metal surface. The abundant functional groups in MPP can effectively trap water molecules to suppress their corrosion to Zn metal, indicating the desolvation and anticorrosion functions. Combined experimental and simulation results show that MPP layers can also lower the nucleation overpotentials and homogenize the electric field distribution and Zn ion flux, which ensure the horizontal and dendrite-free Zn metal deposition . The MPP-Zn electrodes exhibit an exceptionally long cycle life of over 1000 h (10 times that of bare Zn) and excellent high-rate capabilities in (a)symmetric cells. When the optimal Zn anodes were coupled with NH 4 V 4 O 10 cathodes, the Zn metal full cells presented a remarkable capacity of 368 mAh g −1 and negligible capacity degradations after 300 cycles, which rivals the state-of-the-art performance in literature. The multifunction-in-one concept in this work would spur the development of practical Zn metal batteries.
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ACS Nano
·
2022
·
IF 18.027
Mingliang Cheng,Mengfan Ying,Rongzhi Zhao,Lianze Ji,Hongxia Li,Xianguo Liu,Jian Zhang,Yixing Li,Xinglong Dong,Xuefeng Zhang
Electromagnetic interference (EMI) shielding materials have attracted intensive attention with the increased electromagnetic pollution, which are required to possess high transparency and flexibility for applications in visualization windows, aerospace equipment, and wearable devices. However, it remains a challenge to achieve high-performance EMI shielding while maintaining excellent light transmittance. Herein, a sandwich composite is constructed by coating the core material of transparent wood (TW) with silver nanowire (AgNW)@MXene, exhibiting a maximum transmittance of 28.8% in the visible range and a longitudinal tensile strength of 47.8 MPa. The average EMI shielding effectiveness can reach up to 44.0 dB under X-band (8–12.4 GHz), ascribed to the increased absorption shielding induced by the multireflection of electromagnetic waves within microchannels of the TW layer and the interfacial polarization between AgNW and MXene. Simultaneously, large-scale EMI shielding films can be conveniently produced by our proposed method, which provides inspiration for the development of advanced EMI shielding materials for wide applications.
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Heliyon
·
2024
·
IF 3.4
Yan Zhang,Hua Wei,Pingguang Zhu,Xiaojuan Hao,Jing Chen,Haina Zhang
The adhesion of bacteria to the surface leads to formation of biofilms causing numerous infection problems in implanting medical devices or interventional therapy. Traditional treatment for such problems is generally to administrate patients with antibiotics or antifungal agent. Alternatively, devices are taken out of the body to mechanically destroy the biofilm and re-used by surgery. In this study, a straightforward method was developed to remove biofilms using a MXene-based photothermal hydrogel. The hydrogel consists of dynamic crosslinking network formed by Schiff-base reaction between aldehyde-containing xyloglucan (OXG) and amine-containing MXene (NH 2 -MXene), which showed efficient killing of both gram-positive Staphylococcus aureus ( S. aureus ) and gram-negative Escherichia coli ( E. coli ) bacteria upon near-infrared (NIR) laser irradiation. The NH 2 -MXene/OXG nanocomposite hydrogel showed a high photothermal antibacterial efficiency and stable photothermal conversion, demonstrated by efficient removal of biofilms ex vivo .
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ACS Applied Energy Materials
·
2024
·
IF 5.4
Shengxue Yan,Rui Huang,Hansai Liu,Shaohua Luo
Supercapacitors (SCs) are promising energy supply systems for various electronics. In this work, we detailed the in situ growth of FeCo2S4 on MXene for asymmetric SCs. Notably, the digital model was first built to explore the relationship between wt (FeCo2S4) and capacitance performance, realizing the maximum theoretical capacity (3635.7 F g–1) prediction. Furthermore, it was discovered that the synergistic effect of the FeCo2S4/MXene heterojunction could dramatically improve conductivity and structural stability, which accelerated charge transmission at the electrode/electrolyte interface, resulting in a significant enhancement in electrochemical performance. The FeCo2S4/MXene electrode exhibited a higher capacitance of 2415.3 F g–1 and a prominent long-term stability of about 90.5%. And the FeCo2S4/MXene//AC declared an impressive energy density of 68.7 Wh kg–1 at a power density of 800 W kg–1. The FeCo2S4/MXene composite systems have great potential for advanced SC systems due to their facile assembly and remarkable electrochemical performance.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tianle Liu,Shitian Zhao,Guokun Yang,Mingsheng Chen,Junhui Kou,Weijian Wang,Guosheng Jiang,Shaojun Zheng
Prominent thermal management, electromagnetic interference(EMI) shielding, and anti-ionizing radiation capabilities are essential trends in developing flexible materials. In this study, we developed a novel flexible MXene/polyvinyl alcohol/ microencapsulated phase change material (MPM) phase change composite film with a sandwich structure using an alternating vacuum filtration method. This film demonstrates good toughness, strength, stability, and durability. Incorporating microencapsulated phase change material(MEPCMs) enhances the enthalpy of the films (110.2J/g). Additionally, due to the incorporation of phase change microcapsules with a unique barium sulfate-based (BaSO 4 ) as the wall material, the films not only possess EMI shielding performance(39.7 dB), but also exhibits resistance to ionizing radiation(4.62 cm 2 g −1 ). Notably, the film can convert light and electrical energy into heat and store this heat as latent heat within the MEPCMs, enabling multi-source thermal management capability. The ease of preparation and exceptional performance of MPM make it highly suitable for a wide range of industrial and wearable applications.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhen Wan,Cheng Li,Ronghui Liu,Wei Zhou,Wenjing Fan,Chuanxue Huang,Yang Liu
Two-dimensional (2D) Ti3C2Tx MXene materials show great potential in electrochemical and flexible sensors due to their high electrical conductivity, good chemical stability, and special delaminated structure. However, their thermal properties were rarely studied, which remarkably affect the stability and safety of various devices. Here, we fabricated a suspended MXene drum resonator photothermally driven by a sinusoidally modulated laser, measured the thermal time constant by demodulating the thermomechanical motion, and then calculated the thermal conductivity and thermal diffusivity of the MXene film. Experiments show the thermal conductivity of the film increases from 3.10 to 3.58 W/m·K while the thermal diffusivity from 1.06 × 10–6 to 1.22 × 10–6 m2/s when temperature increases from 300 to 360 K. We also confirm the film thermal conductivity is mainly contributed by phonon transport rather than electron transport. Furthermore, the relationship between the mechanical and thermal properties of the MXene films was disclosed. The thermal conductivity decreases when film strain increases, caused by enhanced phonon scattering and softening of high-frequency phonons. The measurements provide a noninvasive method to analyze the thermal characteristics of suspended MXene films, which can be further extended to the thermal properties of other 2D materials.
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Energy & Environmental Materials
·
2024
·
IF 13
Hui Zhang,Xingwu Zhai,Xin Cao,Zhihao Liu,Xinfeng Tang,Zhihong Hu,Hang Wang,Zhandong Wang,Yang Xu,Wei He,Wei Zheng,Min Zhou,ZhengMing Sun
Since 2019, research into MXene derivatives has seen a dramatic rise; further progress requires a rational design for specific functionality. Herein, through a molecular design by selecting suitable functional groups in the MXene coating, we have implemented the dual N doping of the derivatives, nitrogen-doped TiO 2 @nitrogen-doped carbon nanosheets (N-TiO 2 @NC), to strike a balance between the active anatase TiO 2 at low temperatures, and carbon activation at high temperatures. The NH 3 reduction environment generated at 400 °C as evidenced by the in situ pyrolysis SVUV-PIMS process is crucial for concurrent phase engineering. With both electrical conductivity and surface Na + availability, the N-TiO 2 @NC achieves higher interface capacitive-like sodium storage with long-term stability. More than 100 mAh g −1 is achieved at 2 A g −1 after 5000 cycles. The proposed design may be extended to other MXenes and solidify the growing family of MXene derivatives for energy storage.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Lanlan Gao,Hong Wang,Yunlei Zhou,Zhipeng Tian,Huanshun Yin,Jun Wang
MXene-based Ti 3 C 2 T X composite aerogels (βCD-MXene-SA) were prepared using thin layers of MXene and sodium alginate (SA) as matrix materials, β-cyclodextrin (β-CD) as surface modifier, and epichlorohydrin as cross-linker. The βCD-MXene-SA was characterized by scanning electron microscopy, X-ray diffraction and Fourier transform infrared (FTIR) spectroscopy, and the results demonstrated that the βCD-MXene-SA had a larger specific surface area and a more developed pore structure. In addition, the maximum adsorption capacity of this βCD-MXene-SA for dibutyl phthalate (DBP) under the optimal adsorption conditions was 25 mg/g. The adsorption kinetics showed that the adsorption process was in good agreement with both kinetic models. The adsorption isotherms were consistent with the Langmuir and Freundlich adsorption isotherm models, suggesting that the adsorption of DBP by βCD-MXene-SA was the result of the combined effect of physisorption and chemisorption. The adsorption process may include monolayer adsorption on homogeneous surfaces and multilayer adsorption on multilayer surfaces. Outside, the ecotoxicological effects of DBP on crops were explored. The results showed that the treated wastewater could promote the growth of green beans, indicating that the toxicity of wastewater was significantly reduced after adsorption treatment.
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Nature Photonics
·
2023
·Vol. 17
·期 7
·622-628
·
IF 35
Zhao Tao,Xie Peiyao,Wan Hujie,Ding Tianpeng,Liu Mengqi,Xie Jinlin,Li Enen,Chen Xuequan,Wang Tianwu,Zhang Qing,Wei Yanyu,Gong Yubin,Wen Qiye,Hu Min,Qiu Cheng-Wei,Xiao Xu
Broadband and efficient terahertz absorbing films are crucial to high-performance terahertz detectors, which are in demand for next-generation wireless communications, astronomy, security screening, medical imaging and so on. Recent studies reported a series of two-dimensional materials for enhanced light absorption in terahertz waves, such as graphene, transition metal dichalcogenides and topological insulators, among others. However, it is still challenging to achieve the intrinsic thin-film absorption limit (50%) across the whole ultrabroad terahertz band. Here we demonstrate that ultrathin 10.2-nm-thick (~ λ /30,000) Ti 3 C 2 T x MXene assemblies can reach the intrinsic thin-film absorption limit across the entire 0.5–10 THz band. Such intriguing phenomena are attributed to the highly concentrated free electrons (~10 21 cm −3 ), short relaxation time (~10 fs) and unique intra- and interflake (hopping) electron transport properties in Ti 3 C 2 T x MXenes. Our results are validated by alternating current impedance theory using the Drude–Smith model, rather than classic direct current impedance matching. We believe that our findings will stimulate more studies of broadband terahertz technologies with MXenes and beyond, providing a route to developing compact, supercontinuum terahertz optoelectronic or photothermoelectric devices.
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MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 2
·1-9
·
IF 5.479
Zheng Jiushang,Wang Bin,Jin Yanzi,Weng Bo,Chen Jiucun
A novel MXene-based biomimetic enzyme was synthesized using adenosine triphosphate (ATP) as a template to modify a Mn 3 (PO 4 ) 2 nanostructure on Mxene-Ti 3 C 2 nanosheets. The resulting composite was used as an electrode material in an electrochemical sensor for superoxide anion (O 2 •− ). It displays excellent catalytic properties which is attributed to the synergistic effects of the two-dimensional conductive substrate and the Mn 3 (PO 4 ) 2 nanoparticles. The addition of ATP results in the formation of a porous and ordered nanostructure of Mn 3 (PO 4 ) 2 . This facilitates the electron transfer between O 2 •− and electrode. The sensor, best operated at 0.75 V (vs. Ag/AgCl), displays a rapid amperometric response with a detection limit of 0.5 nM and an analytical range that extends from 2.5 nM to 14 μM. Conceivably, it has potential in the detection of O 2 •− released by living cells.
Nanostructured MXenes were synthesized by in-situ growth of Mn 3 (PO 4 ) 2 on Ti 3 C 2 nanosheets under the induction of adenosine triphosphate (ATP). They display enzyme mimickong properties. A sensor fabricated with the composites can be used for the detection of superoxide anions released by HepG2 cells.
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Catalysts
·
2022
·Vol. 12
·期 6
·599
·
IF 4.501
Yong Li,Mingqing Zhang,Yanfang Liu,Qinghua Zhao,Xin Li,Qianyu Zhou,Yuanfu Chen,Shifeng Wang
Research has demonstrated that the formation of composites of titanium dioxide (TiO2) with silver phosphate (Ag3PO4) through the construction of heterojunctions can expand its light absorption range and suppress the recombination of photogenerated electron–hole pairs, thereby improving the photocatalytic performance. However, this method offers only limited performance improvements, and the composite photocatalysts are costly due to the expensive Ag3PO4. In this study, Ti3C2MXene, which has good hydrophilicity and excellent electrical conductivity, is first used to form Schottky junction composites with bronze TiO2(TiO2(B)) via electrostatic self-assembly. Then, Ag3PO4quantum dots were further formed on the surface of the TiO2(B)/Ti3C2MXene by in situ self-growth, and Ag3PO4formed heterojunctions and Schottky junctions with TiO2(B) and Ti3C2MXene, respectively. Finally, a ternary composite photocatalyst TiO2(B)/Ti3C2MXene/Ag3PO4was jointly constructed by these functional junctions. Under the synergistic effect of these functional junctions, the mobility and fast separation performance of photogenerated electron–hole pairs of the composite photocatalyst were significantly improved, the recombination of photogenerated electron–hole pairs was effectively suppressed, and the light absorption performance was enhanced. As a result, the composite photocatalyst exhibited excellent photocatalytic performances.Keywords:ternary composite photocatalyst;heterojunction;photocatalytic degradation;bronze TiO2;Ti3C2MXene
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Nanoscale
·
2021
·Vol. 13
·期 44
·18546-18557
·
IF 7.79
Lang Li,Yang Lu,Ziting Qian,Zhaoyan Yang,Shenfei Zong,Zhuyuan Wang,Yiping Cui
The exploration of MXenes, especially nitride MXenes, in the field of theranostic nanomedicine is still in its infancy. Here, towards synergistic chemo-photothermal oncotherapy, we demonstrate the first kind of 2D titanium nitride (Ti2N) MXene-based nanosystem (Ti2N@oSi) for dual-strategy synergistic oncotherapy. The unique structure of Ti2N nanosheets endows the drug carriers with an ultrahigh loading capacity of 796.3% and an excellent NIR photothermal conversion efficiency of 41.6% for chemo-photothermal therapy. After being coated with a biodegradable organosilica shell, the Ti2N@oSi nanocarriers show excellent characteristics of tumor targeting, pH/glutathione/photothermal-responsive drug release and dual-drug combination chemotherapy. Both in vitro and in vivo therapeutic evaluations demonstrate the pronounced tumor growth inhibition effect and superior biocompatibility of Ti2N@oSi nanocarriers. The excellent drug loading ability, photothermal conversion ability and surface modifiability of Ti2N open up new opportunities for tumor microenvironment-targeted synergistic oncotherapy. This work is supposed to broaden the application of MXenes in nanomedicine and, particularly, provide the first sight to the biomedical application of nitride MXenes.
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