CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Lei Wang,Yilun Gao,Jianjun Luo,Wenyang Xu,Chi Zhang,Hua Yuan,Yaopeng Zhang,Yaokun Pang
Biodegradable or eco-friendly triboelectric materials from natural polymers are considered promising and viable alternative for the development of green triboelectric nanogenerators (TENGs). Yet, they are mostly struggling from poor mechanical properties and low triboelectric output performance. In this work, we developed a highly efficient NH 2 -MXene/TiO 2 @sodium alginate (NMTS) composite film with NH 2 -MXene/TiO 2 as a filler and sodium alginate (SA) as a matrix and a TENG based on this composite film (NMTS-TENG) was constructed. The tribo-positive characteristic of SA was enhanced by adding NH 2 -MXene and TiO 2 . Different loaded content of the NH 2 -MXene and TiO 2 were explored and optimized to improve mechanical properties of the composite film and the output performance of NMTS-TENG. The microstructure and dielectric constant of the composite films were well characterized to investigate the enhancement mechanism. Under optimal conditions, the tensile strength of the composite film reaches up to 175.0 MPa and surpass the pure SA film. The NMTS-TENG shows the output performance with an open-circuit voltage of 357.6 V and short-circuit current of 55.1 µA, and the output peak power increases by 9.3 times compared with pure SA-based TENG. In addition, we developed a TENG device to harvest ocean wave energy for self-powered cathodic protection. The electrochemical test results reveal that the open circuit potential of the protected Q235 carbon steel can decrease by 74 mV and the corrosion potential decrease by 146.5 mV, indicating the good anti-corrosion properties. This study provides a promising method to develop high-performance biomaterials based TENG and expands the practical application of SA in the field of the electrochemical cathodic protection.
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Small Methods
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2024
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IF 10.7
Yifan Liu,Deke Li,Guangyi Tian,Chenggong Xu,Xionggang Chen,Jinxia Huang,Zhiguang Guo
Solar-driven water evaporation is considered as the sustainable approach to alleviate freshwater resource crisis through direct use of solar energy. However, it is still challenging to achieve the multifunctional solar evaporators equipped with both high evaporation and purification performance to handle practical complex wastewater. Here, a simple and cost-effective multifunctional 3D solar evaporator is prepared by alternately decorating the commercial sponge with FeOOH quantum dots (FQDs) supported MXene sheets composites and chitosan hydrogel coatings for enabling the solar water evaporation and organic wastewater photodegradation simultaneously. MXene composites allow the solar evaporator with excellent photothermal conversion performance, the hydrophilic chitosan hydrogel coated interconnecting skeleton structures of sponge serve as the mass transfer and water transport channels. The Fenton-catalytic FQDs anchored on the MXene sheets surface accept the photo-generated electrons of MXene sheets to induce the organic pollutant photo-Fenton degradation reaction under sunlight irradiation. The resulting evaporator possesses both excellent water evaporation rate of 2.54 kg m −2 h −1 and high degradation efficiency (99.24% for methylene blue), coupled with durable salt-resisting performance during long-term seawater desalination (20 wt.% NaCl). This work provides a simple and feasible strategy for designing multifunctional solar evaporators to meet the potential application scenarios in practice.
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高影响因子
IEEE SENSORS JOURNAL
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2024
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IF 4.3
Chenbo Gong,Zhongmei Xia,Runyi Han,Zichen Qi,Jingrui Feng,Zixu He,He Liu,Jing Gao,Yong Wei,Zhaopeng Xu
This study presents a high-performance triboelectric nanogenerator fabricated by incorporating 2D-MXene nanosheets into a polyvinylidene fluoride-co -hexafluoropropylene negative tribo-layer using a simple blade-coating technique, combined with a Nylon positive tribo-layer. The assembled triboelectric nanogenerator exhibits outstanding electrical performance, with increases of 185%, 295%, and 184% in open-circuit voltage, short-circuit current, and transferred charge, respectively, compared to the original polyvinylidene fluoride-co-hexafluoropropylene nanogenerator. Under optimal conditions, the device demonstrates long-term stable output, achieving a peak-to-peak short-circuit current of 49.40 μA and a peak power density of 4.9 W/m². These performance improvements are mainly due to the strong interfacial polarization induced by the 20 wt.% MXene loading, which enhances the dielectric properties and charge-trapping capability of the negative tribo-layer. The device successfully harvests biomechanical energy from human motion, further demonstrating its potential for use in wearable electronics, real-time motion sensing, and biomechanical energy harvesting applications. This study emphasizes the critical importance of advanced materials engineering in developing of next-generation, self-powered sensors, and energy harvesting systems, which are essential for enabling sustainable and portable electronic technologies.
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POLYMER ENGINEERING AND SCIENCE
·
2025
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IF 3.2
Huolin Zhong,Hui Fang,Zhao Yan,Fangjuan Wu
MXenes, two-dimensional transition metal carbides and nitrides, show great potential in various applications. However, traditional synthesis methods often involve toxic fluorine-containing etchants, limiting large-scale production. This study introduces a novel, environmentally friendly approach for synthesizing Ti 3 C 2 T x MXene nanosheets using stone grinding-assisted exfoliation and mild alkaline etching at 80°C. The synthesized MXene nanosheets exhibited high aspect ratios with transverse dimensions mostly on the micrometer scale and a thickness of approximately 3 nm, corresponding to one to two layers of Ti 3 C 2 . MXene/polyvinyl alcohol (PVA) composite membranes were fabricated to demonstrate practical applications. The composite membrane containing 1 wt% MXene achieved a 99.9% UV shielding rate while maintaining 67% visible light transmittance. Furthermore, it significantly enhanced PLA's UV resistance, with protected samples retaining 98.1% tensile strength after 48 hours of UV exposure, compared with 47.8% for unprotected PLA. This fluorine-free synthesis method addresses environmental concerns and enables large-scale MXene production for advanced UV protection applications. Highlights Ti 3 C 2 T x MXene is made via stone grinding and alkaline etching. MXene nanosheets are produced in the micron range and are 1–2 layers thick. The fluorine-free synthesis enables green, large-scale production of MXene. MXene/PVA films show 99.99% UV shielding with 67% visible light transmittance. MXene/PVA coating improves PLA's UV resistance, keeping 98.1% of tensile strength.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Ruiwen Shu,Lijuan Nie,Zongli Wan
The fabrication of three-dimensional (3D) graphene-based composites with low filling ratio, strong absorption strength and wide absorption bandwidth remains a great challenge. In this work, nitrogen-doped reduced graphene oxide/Ti 3 C 2 T x (NRGO/MXene) composite aerogels were prepared by a facile hydrothermal method. The results of microscopic morphology analysis showed that the as-prepared NRGO/MXene composite aerogels had a unique 3D layered stacked porous network structure. Moreover, the obtained binary composite aerogels had low bulk density (11–13 mg/cm 3 ) and excellent compression recovery. Furthermore, the addition amount of MXene had great influence on the complex permittivity, impedance matching and microwave absorption properties. When the addition amount of MXene was 15 mg and the filing ratio was 10 wt%, the NRGO/MXene composite aerogel exhibited the best microwave absorption performance with the minimum reflection loss of −62.1 dB and a broad effective absorption bandwidth of 5 GHz. The practical application potential of NRGO/MXene composite aerogels was predicted by radar cross section simulation. In addition, the probable microwave absorption mechanism of NRGO/MXene composite aerogels were also elucidated. This work was expected to provide a reference for the fabrication of 3D graphene-based composites as lightweight, efficient and broadband microwave absorbers.
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Energy Material Advances
·
2025
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IF 15.9
Shilong Zhang,Hanfu Wang,Jia Fu,Guangming Chen
Despite the recent significant advancements of thermoelectric (TE) and TE generators (TEGs), the preparation of high-performance flexible films of organic/inorganic TE composites and the subsequent rational design of TEGs still remain a challenge. Here, the flexible films of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/single-walled carbon nanotube/MXene (PEDOT:PSS/SWCNT/MXene) ternary composites were prepared by a pretreatment using ethylene glycol (EG), a vacuum filtration, and a subsequent posttreatment with dimethyl sulfoxide (DMSO). The composites exhibited a maximum room-temperature power factor (PF) of 162.15 ± 3.9 μW/(m·K2). Then, the TEGs with horizontal and vertical heat flow architectures were designed, and the effect of the number of TE legs was considered. Specifically, the vertically structured TEG-9pn prototype displayed a remarkably enhanced output power density of 474.87 μW/cm2 under a temperature gradient of 60 K. Finally, the application scenarios of harvesting the heat from a beaker containing heat water and a hot plate were explored with both horizontal and vertical structure designs. Our work is beneficial to the preparation of flexible films of organic polymer TE composites and assembly of TEGs with versatile structural designs.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Peilei Zhou,Kaijie Yang,Li Liu,Qianqian Liu,Naizhong Zhang,Jia Xu
Solar-driven interfacial evaporation presents significant potential for seawater desalination and wastewater purification. However, prolonged operation in marine environments often results in salt accumulation, which adversely impacts the performance and lifetime of system. Despite the progress in material design, achieving efficient evaporation while mitigating salt crystallization remains challenging in high-salinity water. In this study, we synthesized a hierarchically structured C 18 H 37 -MXene/PA/MS evaporator employing a simple yet effective methodology specifically designed for applications in high-salinity water environments. The evaporator features a dual-region configuration, with an upper hydrophobic light-absorbing layer comprising modified MXene and polyamide (PA) membranes and a hydrophilic lower layer consists of hydrophilic melamine sponge (MS). This innovative design, incorporating an ultra-thin polyamide interlayer, significantly enhances interfacial stability, thereby mitigating the interfacial separation typically observed in conventional Janus materials during prolonged usage. Furthermore, the meticulous control over the thickness of the hydrophobic layer (5.54 μm) ensures optimal thermal insulation properties of the material. Consequently, the C 18 H 37 -MXene/PA/MS evaporator demonstrates an impressive evaporation rate of 1.49 kg m −2 h −1 under 1 sun illumination, with a high energy efficiency of 92.8 %. Furthermore, the Janus architecture ensures steady performance in high salinity conditions, sustaining a high evaporation rate of 1.46 kg m −2 h −1 even in a 20 wt% NaCl solution. Furthermore, under natural sunlight, the daily freshwater yield reaches 8.91 kg m −2 . The exceptional evaporation efficiency and robust salt resistance highlight its strong potential for water desalination and wastewater treatment, contributing to the advancement of sustainable water resource management.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
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IF 11.2
Lian Yin,Jiale Zhang,Jianjian Luo,Yongqian Shi,Bin Yu,Sheng Zhang,Keqing Zhou
With the continuous advancement of electronic devices, flexible thin films with both thermal management functions and excellent electromagnetic interference (EMI) shielding properties have received much attention. Hence, inspired by Janus, a CNF/MXene/ZnFe 2 O 4 @PANI composite film with an asymmetric gradient alternating structure was successfully prepared by adjusting the filler content of the conductive and magnetic layers using a vacuum-assisted filtration method. Benefiting from the magnetic resonance and hysteresis loss of ZnFe 2 O 4 @PANI, conductive loss and dipole polarization of MXene, as well as the exclusive “absorption-reflection-reabsorption” shielding feature in the alternating multilayered films, CM&CZFP-4G film has superior EMI shielding performance, with an EMI SE of up to 45.75 dB and shielding effectiveness of 99.99%. Surprisingly, the composite film maintains reliable EMI shielding properties even after prolonged erosion in harsh environments such as high/low temperatures, high humidity, acids and alkalis. Furthermore, the CM&CZFP-4G responded quickly within about 50 s and reached a maximum steady-state temperature of 235.8 °C at an applied voltage of 9.0 V, indicating the obtained film acquired outstanding and controllable Joule heating performance. This result was attributed to the homogeneous dispersion of MXene to build up a conductive network and endow the CNF/MXene with high conductivity. Meanwhile, the fire resistance of CM&CZFP-4G was significantly improved compared to pure CNF, which guaranteed fire safety during its application. Additionally, contributed by long fiber entanglement of CNF, extensive hydrogen-bonding interactions and multilayer structural design, the CM&CZFP-4G film exhibits excellent mechanical characteristics, with the tensile strength and fracture strain of 27.74 MPa and 6.21%, separately. This work offers a creative avenue to prepare multifunctional composite films with electromagnetic shielding and Joule heating for various application environments.
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高影响因子
INORGANIC CHEMISTRY
·
2025
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IF 4.7
Jinchang Zhang,Xuefeng Cheng,Jicai Jiang,Apiladda Pattanateeradetch,Shuai Shi,Chanat Chokejaroenrat,Qingfeng Xu,Jianmei Lu
Selective enrichment of cesium ions (Cs+) at ultralow concentrations is essential for resource recovery and radioactive waste disposal, yet efficient adsorbents are lacking. Herein, we reported a Prussian blue analogue (K2Cu3(Fe(CN)6)2, Cu-PBA) decorated on MXene nanosheets by in situ fabrication, forming a composite material termed PMX, for enhanced adsorption of Cs+ in acidic solutions and seawater. The stable, negatively charged MXene effectively anchors Cu2+ precursors and promotes Cs+ adsorption. The synergistic interaction between MXene and the in situ-synthesized Cu-PBA significantly enhances the adsorption performance and water stability of PMX in both acidic solutions and seawater. PMX achieves rapid adsorption equilibrium within 5 min, with a high adsorption capacity of 408.2 mg/g at pH 1, surpassing conventional adsorbents. Moreover, PMX shows excellent Cs+ selectivity (Kd = 68,361.7 mL/g), cycle stability, and notable anti-irradiation ability, demonstrating superior efficiency in Cs+ enrichment from complex matrices. The adsorption mechanism involves electrostatic attraction and K+/Cs+ ion exchange, facilitated by MXene’s functional groups and the Cu-PBA structure. These findings underscore the excellent potential of PMX as an efficient adsorbent for resource enrichment and the removal of radioactive elements such as Cs+.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Na Xiao,Ping Han,Zhaoqi Chen,Qiuling Chen
Under the spotlight for their potential to reduce over-potential, photo-assisted Li–O 2 batteries still face a key challenge: the rapid recombination of photo-generated electron-hole pairs, which limits their efficiency. In this study, we address this limitation by designing a Li–O 2 battery that integrates both photo and magnetic field assistance, using an S-scheme MXene/In 2 S 3 /CoFe 2 O 4 heterojunction photocathode. This unique combination enhances visible light absorption and generates a strong built-in electric field, facilitating effective charge separation and boosting photocatalytic activity. During discharge, photo-generated electrons participate in the oxygen reduction reaction, while photo-induced holes contribute to the decomposition of discharge products during charging. Furthermore, the introduction of a magnetic field, confirmed through vibrating sample magnetometer, Mössbauer spectroscopy, X-ray absorption near edge structure, and cyclic voltammetry analyses, enhances electron-hole separation via Lorentz forces and spin–orbit coupling, accelerating the formation and decomposition of Li 2 O 2 . With this synergistic approach, the battery achieves a high specific capacity of 26,500 mAh g −1 , ultra-low oxygen reduction/evolution reaction over-potentials of 0.08 V/0.17 V, and a long cycle life of 2000 cycles with energy efficiency of 98.11 %. This work demonstrates the promising potential of combining photo and magnetic field effects to improve the electrochemical performance of Li–O 2 batteries, opening new avenues for high-performance energy storage systems.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
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IF 11.2
Qing-Yue Ni,Xiao-Feng He,Jia-Lin Zhou,Yu-Qin Yang,Zi-Fan Zeng,Peng-Fei Mao,Yu-Hang Luo,Jin-Meng Xu,Baiyu Jiang,Qiang Wu,Ben Wang,Yu-Qing Qin,Li-Xiu Gong,Long-Cheng Tang,Shi-Neng Li
For advanced conductive hydrogels, adaptable mechanical properties and high conductivity are essential requirements for practical application, e.g., soft electronic devices. Here, a straightforward strategy to develop a mechanically robust hydrogel with high conductivity by constructing complicated 3D structures composed of covalently cross-linked polymer network and two nanofillers with distinguishing dimensions is reported. The combination of one-dimensional quaternized cellulose nanofibrils (QACNF) and two-dimensional MXene nanosheets not only provides prominent and tunable mechanical properties modulated by materials composition, but results in electronically conductive path with high conductivity (1281 mS m –1 ). Owing to the uniform interconnectivity of network structure attributed to the strong macromolecular interaction and nano-reinforced effect, the resultant hydrogel exhibits a balanced mechanical feature, i.e., high tensile strength (449 kPa), remarkable stretchability (> 1700 %), and ultra-high toughness (5.46 MJ m –3 ), outperforming those of virgin one. Additionally, the enhanced conductive characteristic with the aid of QACNF enables hydrogels with impressive electromechanical behavior, containing high sensitivity (maximum gauge factor: 2.24), wide working range (0–1465 %), and fast response performance (response time: 141 ms, recover time: 140 ms). Benefiting from the excellent mechanical performance, a flexible strain sensor based on such conductive hydrogel can deliver an appealing sensing performance of monitoring multi-scale deformations, from large and monotonous mechanical deformation to tiny and complex physiological motions (e.g., joint movement and signature/vocal recognition). Together, the hydrogel material in this work opens up opportunities in the design and fabrication of advanced gel-based materials for emerging wearable electronics.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Zhiwen Shi,Lijuan Qiao,Zhi Jia,Peng Zhang,Bingxin Liu,Li Gao
It is of great significance to detect methanol in human exhaled breath since it may cause neurological disorders. In this study, N-doped Ti 3 C 2 T x MXene was synthesized by annealing and nitrogen doping in clay-like Ti 3 C 2 T x MXene. Then, TiO 2 nanospheres was generated in situ on the surface of N-doped Ti 3 C 2 T x MXene to provide adsorption and reaction sites for methanol. Based on the synergistic effects of electronic properties and gas adsorption, the N-Ti 3 C 2 T x MXene/TiO 2 exhibits high responsiveness and excellent selectivity to methanol at room temperature. Moreover, the detection limit is 0.1194 ppm. In addition, the adsorption and oxidation process of methanol on the N-Ti 3 C 2 T x MXene/TiO 2 was explored by in situ infrared spectra testing to reveal that the oxygen vacancy on the surface of N-Ti 3 C 2 T x MXene/TiO 2 plays an important role in the selective detection of methanol. This experiment provides a feasible solution for the detection of methanol gas in exhaled breath at room temperature.
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危险品化学品经营许可证（带存储）