INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Chao Li,Tongtong Yun,Yehan Tao,Jie Lu,Chaoxu Li,Jian Du,Haisong Wang
Incorporating biopolymers into two-dimensional transition metal carbides and/or nitrides (2D MXene) has been demonstrated as an effective strategy to improve the mechanical behaviors of MXene-based composites. However, the insulate nature of biopolymers inevitably deteriorated the electrical conductivity and the sensitivity of assembled sensors. Herein, a novel cellulose nanofiber (CNF)/MXene/carbon black (CB) composite was demonstrated as the conductive layer in eco-friendly cellulose paper-based sensors by intercalating the CB into the MXene/CNF interlayer, followed by coating hydrophobic SiO 2 for encapsulation. Befitting from the high-density crack-microstructures between CB and MXene, the fabricated superhydrophobic paper CB/CNF/MXene/SiO 2 sensor delivered ultrahigh sensitivity of 729.52 kPa −1 , low detect limit of 0.29 Pa, rapid response time of 80 ms and excellent stability over 10,000 cycles. Moreover, the fabricated sensor was capable of detecting the physiological parameter of human ( e.g. huge/subtle movements) and spatial pressure distribution. Furthermore, the presence of SiO 2 layer endowed the sensor with superhydrophobic performance (water contact angle ∼158.2 o ) and stable electrical signals under high moisture conditions or even under water. Our work proposed a novel strategy to boost the sensitivity of MXene-based conductive layer in flexible electronic devices.
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高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Qiaoqiao Bai,Xin Liu,Xiaohu Shi,Ziwei Wang,Ziyi Wu,Qizhi Dong,Nan Liu,Tang Liu,Song Liu
With the rapid development of technologies, such as the Internet of Things and artificial intelligence, the flexible electronic skin (e-skin) that bridges the material and the physical world presents vast market potential. However, the development of cost-effective, multifunctional e-skin remains a formidable challenge. Herein, a dual-functional e-skin based on a microspinous MXene/PDMS composite film is prepared by using a low-cost natural template method. The e-skin has good performance, making it suitable for detecting small pressures and joint movements as well as high-quality electromyogram and electrocardiogram signals. The e-skin can monitor a variety of human motions and electrophysiological signals, positioning it as a promising tool in the areas of motion detection and health monitoring.
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DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Md. Abdul Khaleque,Md. Romzan Ali,Mohamed Aly Saad Aly,Md. Ikram Hossain,Kim Han Tan,Md. Abu Zaed,Rahman Saidur,Md. Mahbubur Rahman,Nabisab Mujawar Mubarak,Md. Zaved Hossain Khan
Ciprofloxacin is a widely used antibiotic for treating numerous bacterial infections and it is also considered by the world health organization (WHO) to be extremely vital for human medicine. Therefore, accurate, simple, and cost-effective detection of ciprofloxacin, a commonly used antibiotic, is critical for treating various bacterial infectious diseases. In this work, glassy carbon electrode/poly (rutin)/Ti 3 C 2 T x, is developed for the detection of ciprofloxacin antibiotic. The electrochemical sensor was modified with rutin hydrate monomer and Ti 3 C 2 T x via electro-polymerization of rutin hydrate and drop-casting of Ti 3 C 2 T x . The modified electrode surface was characterized using scanning electron microscopy, high-resolution transmission electron microscopy, attenuated total reflectance- Fourier transform infrared spectroscopy, and electrochemical impedance spectroscopy. The oxidation of ciprofloxacin was performed in 0.01molL −1 of phosphate buffer at a pH level of 5.0. This medium established a linear range of 1.0 × 10 −9 -1.0 × 10 −4 molL −1 , limit of detection at 1.0 × 10 −9 molL −1 and sensitivity of 0.49 μA/μMcm 2 . Finally, the modified electrode displayed high selectivity when tested in inorganic-organic mixtures as well as in real sample medium such as blood serum. To the best of our knowledge the current work is the first to report the use of MXene/rutin composite for electrochemical sensing mechanism. The proposed electrochemical sensor has high potential for the formation of therapeutic drug doses application via monitoring of CIP patient intake (clinical settings of CIP).
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Nanomaterials
·
2024
·Vol. 14
·期 22
·1835
·
IF 4.4
Chong Li,Ran Tao,Jinqiao Hou,Huanming Wang,Chen Fu,Jingting Luo
Ammonia (NH 3 ) gas is prevalent in industrial production as a health hazardous gas. Consequently, it is essential to develop a straightforward, reliable, and stable NH 3 sensor capable of operating at room temperature. This paper presents an innovative approach to modifying SnO 2 colloidal quantum dots (CQDs) on the surface of Ti 3 C 2 T x MXene to form a heterojunction, which introduces a significant number of adsorption sites and enhances the response of the sensor. Zero-dimensional (0D) SnO 2 quantum dots and two-dimensional (2D) Ti 3 C 2 T x MXene were prepared by solvothermal and in situ etching methods, respectively. The impact of the mass ratio between two materials on the performance was assessed. The sensor based on 12 wt% Ti 3 C 2 T x MXene/SnO 2 composites demonstrates excellent performance in terms of sensitivity and response/recovery speed. Upon exposure to 50 ppm NH 3 , the frequency shift in the sensor is −1140 Hz, which is 5.6 times larger than that of pure Ti 3 C 2 T x MXene and 2.8 times higher than that of SnO 2 CQDs. The response/recovery time of the sensor for 10 ppm NH 3 was 36/54 s, respectively. The sensor exhibited a theoretical detection limit of 73 ppb and good repeatability. Furthermore, a stable sensing performance can be maintained after 30 days. The enhanced sensor performance can be attributed to the abundant active sites provided by the accumulation/depletion layer in the Ti 3 C 2 T x /SnO 2 heterojunction, which facilitates the adsorption of oxygen molecules. This work promotes the gas sensing application of MXenes and provides a way to improve gas sensing performance.
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Advanced Materials Interfaces
·
2024
·Vol. 12
·期 1
·2400565
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IF 4.3
Na Kong,Ting Ren,Hui Yang,Mia Angela N. Judicpa,Ken Aldren S. Usman,Xu Zhao,Yanqiu Shao,Joselito M. Razal,Jinlong Tao,Jizhen Zhang
Flexible gas sensors are gaining interest for real-time volatile gas monitoring. A natural rubber (NR)/MXene nanocomposite sensor is developed. Among the six selected target volatile gases, the composite sensor exhibited a strong response value (82% toward 100 ppm NH 3 ) with the fastest response/recovery time (12.3 s/15.5 s) to NH 3 . The sensitivity showed a clear dependence of gases, suggesting a good selectivity to varying gases. Ti 3 C 2 T x MXene gas sensors exhibited a very low limit of detection of 50–100 ppb for volatile organic compounds (VOCs) at room temperature. In addition, the NR/MXene sensor allows detection of the mixture of ammonia (NH 3 ), dimethyl sulfoxide (DMSO), and acetone (C 3 H 6 O) and it shows good response depending on the total concentration of VOC gases. Furthermore, the flexible nanocomposite sensor exhibits stable sensing performance at different bending states (0-120°) and shows 20-day atmospheric stability. This sensor's ability extends to alcohol breath analysis, useful for drunk driving detection. This work paves the way to the possibility of using robust MXene-based toward practical realization of electronic devices.
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ACS Applied Polymer Materials
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2024
·
IF 4.4
Yanbo Liu,Tianyi Zhang,Bo Yang,Ming Hao,Xiaodong Hu,Xiaoxiao Wang
Piezoelectric devices are becoming increasingly attractive in areas such as wearable electronics, mobile environmental sensors, and health monitoring due to their unique capability to harvest discrete mechanical energy. Nevertheless, most piezoelectric materials are fabricated into low-dimensional products, which limits the performance breakthroughs and application prospects of these devices. Here, a series of polyvinylidenefluoride (PVDF) doped with dopamine hydrochloride@BaTiO3/MXene/chitosan (PVDF-B/MXene/CS) composite aerogel piezoelectric devices with outstanding output performance were fabricated by combining electrospinning and freeze-drying techniques. Among them, the PVDF-B/MXene/CS composite aerogel-based piezoelectric devices with electrodes exhibited rather better output performance compared to those without electrodes, while the electrodeless piezoelectric devices demonstrated excellent piezoelectric response under various stress modes. The electrodeless piezoelectric devices maintained a stable voltage over 1800 cycles and achieved the maximum power output of 4.25 nW with an external resistance of 100 MΩ. Furthermore, the electrodeless piezoelectric device was capable of charging capacitors with varying capacities and could easily illuminate a small light emitting diode (LED) light by manual tapping. These piezoelectric devices showed tangible and stable signals regarding mechanical stimuli monitoring, such as wrist bending, finger tapping, and pedal movements. This work not only expands the range of aerogel-based piezoelectric materials but also showcases their immense potential in the field of piezoelectric devices.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Peng Wang,Chengming Yu,Jiale Huang,Zhudan Jiang,Xinyu Jiang,Shanglin Xiang,Dongyu Cai
Developing an efficient photocatalyst with good recyclability is vital for the sustainability and affordability of photocatalytic technology in the treatment of wastewater. This work demonstrates a facile route for realizing robust TiO 2 @Ti 3 C 2 T x fibers with exceptional photocatalytic capability and recyclability. In this route, an alkalization/de-alkalization process was developed to treat a concentrated Ti 3 C 2 T x suspension known as MXene sediment, followed by a wet spinning process. The pretreatment of Ti 3 C 2 T x suspensions promoted the expansion of the d-spacing of stacked Ti 3 C 2 T x layers in the microfibers. It was found that this was beneficial for increasing the population of TiO 2 nanoparticles grown from Ti 3 C 2 T x layers. The calcination of these fibers was systematically investigated to optimize the photocatalytic performance of TiO 2 @Ti 3 C 2 T x fibers. Thanks to the TiO 2 nanoparticles, the resulting fibrous photocatalysts not only enabled the fast degradation of RhB dyes but also exhibited excellent recoverability from water.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
·
IF 11.2
Haonan Zhai,Huibin Liu,Yufen Zhang,Jinjin Wen,Wenyue Yang,Huiting Xu,Xiaoteng Yan,Wenchao Peng,Jiapeng Liu
Aqueous zinc ion batteries (AZIBs) are now gaining widespread attention because of their cost-effectiveness, intrinsic safety, and high theoretical capacity. Nevertheless, it is still crucial to exploit high-performance electrode materials. Herein, the freestanding 1T MoS 2 @Mxene hybrid films (MMHF) were synthesized and directly served as the cathode of AZIBs. The freestanding MMHF exhibited the hierarchical layer structure with excellent conductivity and strong interfacial interaction, which promoted the exposure of more active sites and the transfer of electrons/ions. Consequently, the MMHF displayed a high specific capacity of 270 mAh g –1 (at 0.1 A g –1 ) and good rate performance. Impressively, even after 2500 cycles under 10 A g –1 , the freestanding MMHF cathode contributed a superior specific capacity of 108 mAh g –1 with an outstanding capacity retention rate of 94.7 %. Meanwhile, the energy storage mechanism of the MMHF electrode was also elucidated through ex-situ characterizations. Furthermore, the density functional theory (DFT) computations revealed the strong interfacial interactions between 1T MoS 2 and MXene, high conductivity, and low Zn 2+ diffusion barrier. This work provides a new viewpoint for designing freestanding transition metal disulfides (TMDs) -MXene hybrid film electrodes for AZIBs.
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Nano Research
·
2024
·
IF 9.5
Zhang Yu,Zhang Guangcheng,Ma Zhonglei,Qin Jianbin,Shen Xi
The increasing need for electromagnetic interference (EMI) shielding of electronics in cold environments such as those in aircraft, space exploration, and wearable heaters to avoid hazardous icing conditions or hypothermia requires the development of thin and lightweight EMI shielding materials preferably by absorbing rather than reflecting electromagnetic (EM) waves while also generating heat through energy-efficient electrothermal conversion. However, it is challenging to achieve absorption-dominant EMI shielding and energy-efficient electrothermal heating simultaneously in a thin and lightweight structure. Here, we develop a heterogeneous composite film comprising a porous multi-walled carbon nanotubes (MWCNTs)/bacterial cellulose (BC) film and an aligned MXene/Ag nanowires (NWs) backing via a sequential vacuum filtration process. The porous film contains random conductive networks of MWCNTs with moderate conductivity while the aligned MXene sheets atop Ag NWs network affords high conductivity in the backing, giving rise to graded electrical conductivity for absorption-dominant EMI shielding. The increasing Ag NW coverage leads to significantly increased electrical conductivity without increasing the EM wave reflection as well as the density and thickness of the film, yielding excellent specific EMI shielding effectiveness (> 8500 dB/(g·cm 2 )), low driving voltage for energy-efficient electrothermal heating (163 °C at 2.5 V), and fast response time (60 s) at a low areal density of 0.015 mg/cm 2 . Combining EMI shielding and electrothermal heating, the heterogeneous film developed here are promising contenders for the protection of electronic equipment in low-temperature environment.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Wei Guo,Zhiyu Chen,Yaxu Zhao,Congyi Zhao,Xiong Lu,Faming Gao
Transition-metal oxides (TMOs) with hierarchical nanostructures derived from metal organic frameworks (MOFs) were widely applied in electrochemical investigation. In this paper, a rational synthesis strategy of TMOs with specific nanostructures and multiple components was reported. Three-dimensional (3D) CuMoV layered metal hydroxides (CuMoV LDHs) architecture was prepared by mild and facile wet-chemistry process to reshape Cu-MOF surface and realize the self-templated conversion. After thermal annealing, hierarchical CuMoV LDHs were transformed to polynary Cu 3 V 2 O 8 /Cu 6 Mo 5 O 18 (CMVO) compounds. Based on the electrostatic attraction, CMVO/MXene (CMVON) compounds were assembled by combining the CMVO and few-layer Nb 2 CT x MXene (f-Nb 2 C) nanosheets and employed as modified materials on the electrode surface. Benefiting from the superior electronic conductivity, large surface area and shortened ion diffusion pathway, the CMVON hybrids demonstrated excellent electrochemical sensing properties. Upon optimum conditions, the constructed CMVON based AChE biosensor manifested markedly analytical performance with the low limit of detection (LOD) and wide linear ranges for parathion-methyl, malathion, and fenitrothion detection.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fangli Yang,Ke Lv,Xu Zhao,Derui Kong,Na Kong,Zirong Luo,Jinlong Tao,Ji Zhou,Joselito M. Razal,Jizhen Zhang
The development of electrode materials with a hierarchically porous structure and good electrical connection is key to improving the charging-discharging rate and energy density of supercapacitors. However, the restacking issue of two-dimensional nanomaterials, such as MXene, seriously hinders the diffusion of electrolyte ions. Different from the extensively used sacrificing template method, a hierarchical heterostructure of electrically conducting mesoporous hollow carbon spheres (MHCS) and MXene composite electrode is designed and achieved through simple vacuum filtration without further template removing procedures. This direct preparation strategy not only effectively improves the specific surface area of the electrode but also enhances the abundant surface pores and good conductivity of MHCS, improving the penetration of the electrolyte solution and shortening the ion transport path, leading to a pronounced improvement in specific capacitance and rate performance of the electrodes. Additionally, the influence of sheath thickness of MHCSs on ion transfer rate is deeply discussed. The introduction of carbon nanotubes (CNTs) further improves conductivity and stability while maintaining good flexibility. Consequently, the MXene/MHCS/CNT film delivers a high specific capacitance (395F g −1 at 2 mV s −1 ), outstanding rate performance (70.9 % at 1000 mV s −1 ), and excellent cycling stability (98.3 % capacity retention after 10,000 cycles). Furthermore, the assembled symmetric supercapacitor provides a maximum energy density of 14.48 Wh kg −1 . This work provides a quick and effective approach for constructing high performance 3D MXene architectures for fast ion transfer electrodes.
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高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 18
·10808-10818
·
IF 10.7
Zhihui Qin,Yunfeng Li,Xiaoming Wang,Ying Liu,Na Li,Qiuli Xu,Lei Ye,Tifeng Jiao
Multifunctional conductive hydrogels are widely used as promising candidates for flexible sensors. For these applications, gels with integrated multiple performances, particularly the combination of high mechanical strength and recyclability, are highly desirable but can be rarely achieved in one gel. Here, a MXene-composited organohydrogel is prepared by a facile freezing–thawing process with the incorporation of tannic acid-modified MXene (TA@MXene) into a poly(vinyl alcohol) (PVA) network in glycerol/water solvent. The introduction of TA can largely improve the stability of MXene in aqueous solution, and meanwhile induces the formation of abundant hydrogen bonds between PVA chains and TA@MXene. The obtained organohydrogel exhibits high tensile strength (3.55 MPa), ultrahigh toughness (9.93 MJ m−3), superior anti-freezing ability (−40 °C), good long-term stability (≥20 days), and remarkable ultraviolet (UV) light filtering capabilities. Interestingly, owing to the reversibility of non-covalent crosslinked structures, the organohydrogel can be recycled and reused by a hot melting–cooling process. Moreover, the organohydrogel-based wearable sensors show high strain sensitivity in a large strain range, which can be used to monitor various human movements and physiological activities, even under harsh conditions or after recycling. This work gives new perspectives for the preparation of high-strength and recyclable gels with multiple functions for flexible sensors.
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