IEEE SENSORS JOURNAL
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2024
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IF 4.3
Jihua Lu,Litong Yin,Pengyu Liu,Lihui Feng,Hongxing Yin
Ammonia (NH3) has a significant impact on human health, merely 300 ppm of which could pose a risk of irreversible harm to human life. Size and sensitivity are two primary factors for real-time sensing of NH3. Through dry grinding, we develop a novel 61-MHz quartz crystal microbalance (QCM) sensor with dimensions of only 5.0 mm in length and 3.2 mm in width. In this study, the MXene/ZnO heterojunction solution is created using the liquid phase method, and it is uniformly sprayed onto the surface of the QCM. The large specific surface area of the MXene/ZnO heterojunction provides additional adsorption sites for NH3 detection, enhancing sensitivity across a wide dynamic range and offering superior selectivity toward ammonia. At a temperature of 25° C, the sensitivity of the MXene/ZnO sensor for detecting NH3 is 1.319 Hz/ppm, surpassing that of the ZnO sensor (0.166 Hz/ppm). Furthermore, the sensor’s recovery time is significantly reduced from typically 300 s under normal conditions to 40 s after exposure to ultraviolet (UV) light. The proposed QCM sensor boasts advantages of compact size, high sensitivity, short recovery time, and exceptional selectivity for ammonia, which presents a novel solution for detecting harmful gases such as NH3 at room temperature.
研究领域:
材料科学
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传感器技术
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环境监测
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Ao Sun,Yingqing Zhan,Qingying Feng,Wei Yang,Hongyu Dong,Yucheng Liu,Ximin Chen,Yiwen Chen
The two dimensional MXene nanosheets lamellar membranes have emerged as the promising candidates for oil/water separation. However, to deal with the large-scale discharge of complicated oily wastewater (including oils, organics, microorganism, etc), developing advanced membrane materials with high permeate flux and enhanced antifouling is still big challenge. Herein, the MXene/ZnO heterojunction was prepared by electrostatic attraction, which was modified by tannic acid (TA) and further self-assembled onto the poly (arylene ether nitrile) (PEN) fibrous mat to construct the multi-functional separation membrane (ZnO/M-TA@PEN fibrous composite membrane). In the hierarchical functional layer, the improved hydrophilicity of TA and the hierarchical micro-/nano-roughness build by ZnO NPs contributed to the super-hydrophilic/underwater super-oleophobic feature (WCA = 0°, UOCA>152°), leading to high separation efficiency and ultra-low oil adhesion. Uniquely, the decoration of ZnO NPs achieved the “intercalation effect” and effectively tuned the interlayer spacing between MXene nanosheets, which conquered the stacking problem of MXene nanosheets lamellar membrane and greatly enhanced the permeation flux of membrane. For separating various oil emulsions, the resulting ZnO/M-TA@PEN fibrous composite membrane displayed superior emulsion separation flux (1815.34 ± 44.73–2053.35 ± 42.62 L/m 2 ·h) and separation efficiency (>99.4%), even in high-temperature and salty environments. More importantly, the heterojunction structure of MXene/ZnO hybrid endowed the fibrous composite membrane with enhanced antibacterial ability and photocatalytic self-cleaning performance toward the degradation of methylene blue, which realized the synergetic antifouling and favorable cycling ability of the fibrous composite membrane. This combination of anti-fouling and high permeability renders the membrane as attractive candidate for dealing with the oily wastewater containing multicomponent pollutants.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Dongxiao Liu,Zechen Yan,Jingyi Zhao,Daqian Zhuang,Yanrui Zhao,Xiaofang Li,Lei Zhu
Developing efficient hydrogel filtration membranes and eco-friendly sustainable water purification methods remain a global challenge. In this study, one convenient hydrogel filter system based on CNFs@MXene@ZnO (CMZ) has been constructed by the one-step injection approach. Herein, MXene nanosheets and ZnO nanoparticles are loaded onto a 3D interwoven CNFs skeleton, constructing a multifunctional superhydrophilic interface. The results demonstrate that the CMZ achieves exceptional separation efficiency (>98 %) and water flux (>1600 L·m⁻²·h⁻¹·bar −1 ) for oil/water emulsions, with notable suspended solids retention (>97.5 %) for oil/water/solid emulsions. The system versatility is further proven by the clean water production performance from complex natural environmental waters, including river water, sea water, and snowmelt. Notably, after the separation process, the CMZ system exhibits the significant photocatalytic properties to degrade the pollutants upon the membrane surface under ultraviolet light conditions. Moreover, when the CMZ reaches its service life, secondary contamination could be avoided by the biodegradation process of the fully bio-based CNFs, enabling the membrane to naturally degrade within 30 days. This study presents not only an eco-friendly and efficient water purification material for complex separation systems, but also a novel, convenient and outdoor water treatment device, advancing the technology for complex separation systems.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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产品关联
DOI
高影响因子
TOPICS IN CATALYSIS
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2024
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IF 2.8
Mi Xionghui,Wang Pingxia,Rokni Hassan
A new ZnO/MXene material was made using a simple hydrothermal method and heat treatment for measuring glucose without enzymes in sports drinks and human blood samples. The best ZnO/MXene-300 material, made at 150 °C and heated at 300 °C, had a large surface area of 152 m2/g, high current density of 1.12 mA/cm2, and low activation energy of 32.6 kJ/mol for glucose oxidation. The sensor could measure a wide range of glucose levels (0.01-12 mM) with a low detection limit (0.005 µM), worked well in the presence of other substances, remained stable (93.6% after 7 days), and gave consistent results (RSD of 3.2%). The material was tested by measuring glucose in sports drinks and blood samples, with measured values close to the actual values (96.4–104.5%) and high precision (RSDs of 2.8% and 3.8%). These results show that ZnO/MXene materials are promising for making sensitive and stable glucose sensors that don’t need enzymes.
研究领域:
材料科学
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生物医学工程
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分析化学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Qingtao Zhu,Xianfen Chen,Duoduo Li,Lei Xiao,Junyan Chen,Lijun Zhou,Jiabin Chen,Quanping Yuan
Cellulose-based piezoelectric composites have attracted extensive attention in recent years due to their low cost, easy molding, high flexibility, and biocompatibility in the manufacture of piezoelectric nanogenerators (PENG) and sensors. In this work, cellulose nanofibril (CNF)/MXene@ZnO (CM@ZnO) piezoelectric composite films with “brick-rebar-mortar” structure are prepared by growing ZnO on the mixed substrate via a high-efficiency two-step hydrothermal method. As a hard bridge, ZnO welds CNF and MXene together to construct the “brick-rebar-mortar” structure, which greatly improves the piezoelectric performance. Its tensile strength reaches 65.13 ± 3.61 MPa, as well as that the longitudinal piezoelectric constant ( d 33 ) attains 14.3 ± 1.3 pC N −1 . Under the force of 300 KPa, the open-circuit voltage ( V OC ) and short-circuit current ( I SC ) of CM@ZnO PENG are as high as 17.15 V and 997 nA, respectively. Under the force of 100 KPa, it can charge a 1.0 µF commercial capacitor to 6.07 V in 400 s. The assembled flexible piezoelectric sensor can accurately collect the pressure or vibration signal caused by bending the wrist (0.59 V) with excellent sensitivity. The performance demonstrates the feasibility of its application in wearable smart devices and provides a reference for new cellulose-based PENGs.
研究领域:
材料科学
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能源技术
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生物医学工程
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产品关联
DOI
高影响因子
CARBON
·
2021
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IF 9.594
Xiaopeng Han,Ying Huang,Sai Gao,Guozheng Zhang,Tiehu Li,Panbo Liu
Continuous 3D hierarchical construction has been proved to serve as a feasible method to prepare high-efficiency microwave absorption (MA) composites. Herein, an innovative hierarchical carbon fiber (CF)@MXene@ZnO core-sheath synergistic structure with tunable and efficient MA performance has been synthesized via a self-assembly (MXene) and hydrothermal (ZnO) process. Because of increased conductivity loss of the interlayer MXene sheath due to synergistic effects and the enhanced impedance matching of the outer ZnO layer, the optimal reflection loss (RL) value of CMZ2 is −67.35 GHz at 9.0 GHz at a thickness of 3.5 mm and the optimal effective absorption bandwidth (EAB) is 5.44 GHz, covering the full X band at a thickness of 4.0 mm. Furthermore, the CMZ microrods can be used as energy transformers and molecular heaters due to the synergistic effects of the high photothermal conversion efficiency of MXene, high photocatalytic activity of ZnO, and high thermal conductivity of CF. When used as wearable CMZ/polyurethane (PU) composite coatings , the surface temperature increases rapidly with a healing efficiency of above 91% for mechanical damage. These results provide a new strategy to fabricate wearable materials with effective MA and photothermal properties for designing safe and wearable devices .
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2026
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IF 9.8
Siqi Li,Wei-Jing Chen,Yajie Kou,Zhaoqing Lu
Flexible and wearable gas sensors are drawing more attention in monitoring air quality and human health. Concurrently, high response, low operation-temperature, and long-term stability are highly required for the gas sensors. Herein, an aramid nanofiber (ANF)-based ammonia (NH 3 ) flexible gas sensor with high response, room temperature stability and low detection limit was prepared. The competitive performances of the gas sensor were achieved by well-constructed MXene@ZnO heterojunctions on ANF aerogel. The obtained ANF/MXene@ZnO flexible gas sensor contributed to a response value of 1 ppm NH 3 as high as 150.7% at room temperature. Furthermore, the sensor also exhibited good long-term stability for 50 days. The excellent NH 3 sensing performances of the flexible ANF/MXene@ZnO sensor is attributed to its high surface area, abundant reaction sites, and the formation of MXene@ZnO heterojunction. The metal-like properties of MXene can provide a variety of electron transport channels, speeding up the electron transport rate. In addition, adsorption of more NH 3 molecules can also enhance the sensitivity of sensitive materials. According to our density functional theory calculations, the adsorption of NH 3 by MXene@ZnO in the materials we studied can reach −1.54 V. This indicates that MXene@ZnO has a strong affinity for NH 3 and can effectively capture NH 3 molecules and increase the response value. This work is expected to afford an effective strategy for designing high-performance flexible gas sensors at room temperature.
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产品关联
DOI
高影响因子
IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2022
·Vol. 69
·期 12
·6811-6816
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IF 3.221
Lingling Chu,Chao Xu,Wei Zeng,Chao Nie,Liting Deng,Fang Lei
The optimized metal-semiconductor-metal (MSM) ultraviolet photodetector (UVPD) based on ZnO/MXene/ZnO (ZMZ) sandwich structure is reported here. Since introducing ZMZ, the photoelectric performance of the UVPD has increased, which benefited from the cooperation between the interface electron depletion layer and injection of hot electrons (HEs), triggering the “storage and ejection” behavior of electrons. In general, under 365-nm laser illumination (6.25 mW/cm2), the Responsivity ( ${R}_{p}$ ) and Detectivity ( ${D}^{\ast }$ ) are almost unexpectedly increased by approximately an order of magnitude compared with pristine ZnO-based UVPD. More specifically, the ON/OFF ratio, ${R}_{p}$ , and ${D}^{\ast }$ are about > $10^{{3}}$ , 25.48 mA/W, and > $10^{{11}}$ Jones, respectively. Further, the long-term stable performance of the flexible ZMZ-based UVPD can also be observed after the 1000th bending cycle. And especially, the maximum attenuation coefficient (AC) of photocurrent is only ~5.75%. This work may offer a meaningful strategy for designing and improving the performance of ZnO-based UVPD in the future.
研究领域:
材料科学
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光电子学
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纳米科技
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半导体器件
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柔性电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）