Journal of Materials Chemistry C
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2023
·Vol. 11
·期 22
·7272-7282
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IF 6.4
Linrong Zhang,Soukaina Khayour,Guozhang Ren,Shunhao He,Junjie Wang,Liuyingzi Yu,Yaxin Song,Chengcheng Zhu,Xing Kang,Yulong Zhang,Zhongyan Gong,Kun Gao,Jin Wang,Huixiang Sheng,Gang Lu,Hai-Dong Yu
Organic electrochemical transistors (OECTs) are promising for highly sensitive chemical and biological detections, because of their signal amplification, low operating voltage, solution compatibility, and high biocompatibility. However, OECTs, particularly the semiconductor layer, still need to be optimized for improving their output performances. Herein, by introducing Nafion, a proton penetrable polymer, into typical semiconductor layers of poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) and poly(3-hexylthiophene) (P3HT), we realize a significant enhancement (up to 10-fold and 4-fold respectively) in transconductance of OECTs. The enhancements are attributed to the introduction of Nafion domains in the semiconductor channel, which increases the surface area of the semiconductor channel and promotes the ion doping/de-doping of the channel. In addition, the Nafion-including OECTs exhibit a fast response time of 20 milliseconds. Due to the improved transconductance and response time, the obtained OECT demonstrates sensitive detections of the pH value and glucose. This work provides a simple and effective method for improving the performance of OECTs, which will be promising in the sensitive and reliable detection of metabolites.
研究领域:
材料科学
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生物医学工程
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电子器件
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 14
·19357-19367
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IF 4.672
Jiuqing Liu,Feifei Song,Junying He,Zikun Hong,Qihou Li,Ya Chen,Lishun Bai,Fanli Zeng,Chen Cheng,Zehao Chen
Summary Owing to its unparalleled theoretical energy density, the Li-O 2 batteries are thought to be one of the most promising energy storage systems, but its application is seriously hindered by its potential safety risks arising from the passivation and corrosion of lithium anode. To address these issues, it is an efficient way to develop functionalized separator that could prevent the migration of anions and macromolecules from cathode toward anode. Herein, a novel Nafion-functionalized polyethersulfone (PES)-based ion-permselective separator was prepared by using non-solvent induced phase separation (NIPS) method. The Nafion ensures a better physical strength of the composite separator, and further characterizations show that the obtained composite separator owns good ionic conductivity (0.52 mS cm −1 ), high lithium ion migration number (0.80), and better cyclic stability (120 cycles, 1000 mAh g −1 ). Consequently, the composite separator serves as an excellent candidate to solve the “shuttle effect” of redox mediators (RMs), the assembled Li-O 2 battery with composite separator adding LiI as RMs presents lower charge overpotential and longer cycle stability (170 cycles, 1000 mAh g −1 ).
研究领域:
材料科学
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电化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Ling Jia,Yue Mao,Siqi Zhang,Hong Li,Ming Qian,Dongbo Liu,Bin Qi
An electrochemical switch sensor toward ephedrine hydrochloride (EPh) determination was developed based on complex reactions and molecular imprinting (MIP) technique. The MIP was formed on a glassy carbon electrode (GCE) modified with Nafion-multi-walled carbon nanotube (Nafion-MWCNTs/GCE). The analytical performances of this sensor were evaluated using several electrochemical methods by measuring the response of EPh elution and re-adsorption in MIP. The working concentration range of this sensor was 1.8 × 10 −7 mol/L ~ 7.5 × 10 −5 mol/L with a detection limit of 7.2 × 10 −8 mol/L (S/N = 3). The sensor also displayed a fast response time of less than 180 s and good anti-interference ability towards several co-existing substances. The determination of EPh in spiked Saliva samples also receives satisfying results which suggest potential applications of the present sensor.
研究领域:
分析化学
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药物分析
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电化学
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 15
·2208
·
IF 4.7
Kun Cai,Jinzhu Yu,Wenjun Tan,Cong Gao,Zili Zhao,Suxin Yuan,Jinghui Cheng,Yajie Yang,Ye Yuan
Nafion membranes are widely used as proton exchange membranes, but their proton conductivity deteriorates in high-temperature environments due to the loss of water molecules. To address this challenge, we propose the utilization of porous aromatic frameworks (PAFs) as a potential solution. PAFs exhibit remarkable characteristics, such as a high specific surface area and porosity, and their porous channels can be post-synthesized. Here, a novel approach was employed to synthesize a PAF material, designated as PAF-45D, which exhibits a specific surface area of 1571.9 m2·g−1and possesses the added benefits of facile synthesis and a low cost. Subsequently, sulfonation treatment was applied to PAF-45D in order to introduce sulfonic acid groups into its pores, resulting in the formation of PAF-45DS. The successful incorporation of sulfonic groups was confirmed through TG, IR, and EDS analyses. Furthermore, a novel Nafion composite membrane was prepared by incorporating PAF-45DS. The Nyquist plot of the composite membranes demonstrates that the sulfonated PAF-45DS material can enhance the proton conductivity of Nafion membranes at high temperatures. Specifically, under identical film formation conditions, doping with a 4% mass fraction of PAF-45DS, the conductivity of the Nafion composite membrane increased remarkably from 2.25 × 10−3S·cm−1to 5.67 × 10−3S·cm−1, nearly 2.5 times higher. Such promising and cost-effective materials could be envisioned for application in the field of Nafion composite membranes.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Qiancan Wang,Dongchen Shen,Zhengkai Tu,Song Li
Incorporating metal-organic frameworks (MOFs) especially the ones with protic functional groups into proton exchange membrane (PEM) can effectively improve its proton conductivity . Lanthanide MOFs (Ln-MOFs) have been recognized as more potential candidates exhibiting proton dissociation capability. However, the performance of PEM upon integrating Ln-MOFs in water electrolyzer has yet to be investigated. In this study, Nafion composites with different loadings of lanthanide Ce-UiO-66 were prepared, characterized and tested by comparing with the non-lanthanide Zr-UiO-66. It was revealed that the proton conductivity of Ce-UiO-66/Nafion composite membrane was higher than pristine Nafion and Zr-UiO-66/Nafion membrane, which was attributed to the fact that the Ce-UiO-66 doping contributed to the construction of the hydrogen-bonded network to enhance the proton conductivity. At 3 wt% Ce-UiO-66 doping, the proton conductivity of the composite membrane can reach 124.45 mS/cm, which is significantly improved by 17 % compared with Zr-UiO-66/Nafion. Such a trend is mainly contributed by the lower proton affinity and proton transfer capability of Ce atoms in Ce-UiO-66, and the higher number of water molecules around Ce atoms favors the reduced tortuosity of the proton conduction pathway in membranes. Single electrolytic cell tests demonstrated the enhancement of electrolysis efficiency upon Ce-UiO-66 doping was improved from 58.77 % to 65.37 % at a current density of 2 A cm −2 .
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
International Journal of Electrochemical Science
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2023
·
IF 1.5
Juan Liu,Wenju Weng,Chunxiao Yin,Guiling Luo,Hui Xie,Yanyan Niu,Xiaoyan Li,Guangjiu Li,Yaru Xi,Yutong Gong,Shuyao Zhang,Wei Sun
In this paper zinc-based metal organic framework material (ZIF-8) modified carbon ionic liquid electrode (CILE) was prepared and electrodeposited with gold nanoparticles to get a composite modified electrode, which was used as the sensing interface for the immobilization of hemoglobin (Hb) with Nafion to prepare a modified electrode (Nafion/Hb/Au/ZIF-8/CILE). Electrochemical behaviors of Hb on the modified electrode were checked by cyclic voltammetry with a pair of well-defined redox peaks appeared. The effects of pH and scan rate on direct electrochemistry of Hb were studied with electrochemical parameters calculated. The prepared electrochemical enzyme sensor showed good catalytic activity to the electroreduction of bromate and nitrite with the linear ranges from 0.5 to 10.0 mmol/L and from 0.1 to 0.8 mmol/L, respectively. The detection limits were calculated as 0.83 mmol/L and 0.03 mmol/L, and the water samples were analyzed to prove the practical application.
研究领域:
生物化学
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分析化学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Daixiong Zhang,Qing Xiang
Nafion-modified coatings can enhance the detection performance of bismuth film electrodes (BFEs). In this work, different coatings (graphene sheets (GS), carbon nanotubes (CNTs), activated carbon (AC), bismuth (Bi), and bismuth trioxide (Bi2O3)) were prepared by Nafion-assisted electrophoretic deposition (EPD). For successful EPD in ethanol, 0.1 mM NaOH + 0.1 g·L–1 Nafion is suggested as a suitable biadditive. With the in situ formation of a BFE on a coating via the square wave anodic stripping voltammetry (SWASV) method, the GS coating prepared by Nafion-assisted EPD exhibits better detection sensitivity and repeatability than the GS coating prepared by the drop method. Therefore, based on the result that the coatings of GS, CNT, AC, Bi, and Bi2O3 can be prepared by EPD with the biadditives of NaOH + Nafion, as well as the fact that both Nafion and EPD can help improve the detection sensitivity of the BFEs formed on these coatings, a novel and general strategy for designing a series of Nafion-modified single-component coatings or bicomposite coatings to form BFEs with good detection performance can be feasibly realized via electrophoretic codeposition.
研究领域:
分析化学
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材料科学
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DOI
高影响因子
RSC Advances
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2023
·Vol. 13
·期 41
·28613-28622
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IF 3.9
Yujun Ji,Gangqiang Tang,Chun Zhao,Xin Zhao,Dong Mei,Yifan Pan,Yanjie Wang
In the past decade, the development of medical health and human–computer interfaces has put forward requirements for the non-contact application of flexible electronics. Among them, flexible humidity sensors play an important role in the field of non-contact sensing by virtue of their rapid response to humidity changes. In this paper, a flexible paper-based humidity sensor with high performance was fabricated by embedded Au@AgNWs electrodes on filter paper through spraying and electroplating (EP) methods. Benefitting from the moisture-sensitive properties of the paper and the tight integration of the electrodes into the filter paper, the sensor shows the humidity monitoring range of 33–100% RH, large response value of I/I0 = 1958, excellent linearity of R2 = 0.99662 and hysteresis performance under the low excitation voltage of only DC 1 V. In addition, the good biocompatibility of the paper-based humidity sensor endows it with multifunctional applications for breath detection, non-contact applications and food security monitoring. Easy access to raw materials and convenient preparation methods of this work provide new ideas for the development and commercialization of flexible humidity sensors.
研究领域:
柔性电子
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传感器
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材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Sha Yu,Yitian Qin,Qi Zhao,Mei Li,Haijun Yu,Guodong Kang,Yiming Cao
Nafion-PTFE hollow fiber composite membranes were applied in the ammonia removal and recovery with a novel aqueous-organic membrane contactor (AOMC) process, in which an aqueous solution and an organic solution were separated by the composite membrane. A kerosene-diluted di-(2-ethylhexyl) phosphoric acid (D2EHPA) solution was used to receive the ammonia, which could be recycled and reused after regeneration by the stripping agent (a dilute solution of H 2 SO 4 , HNO 3 , or H 3 PO 4 ). The new-type membrane contactor can avoid the accompanying water transport in conventional membrane contactors. The effects of experimental factors including the pH, the velocity and the initial ammonia concentration of the feed on the overall mass transfer of the ammonia were investigated. Meanwhile, how the regeneration experiment parameters influenced the stripping ratio was also studied. The results showed that the AOMC process was more favorable to treat ammonia feed with low ammonia concentrations. The ammonia removal could be over 99% under certain conditions. Additionally, the ammonia was concentrated 26.4 times after four cycles. It was found that the accompanying water transport was non-negligible in the traditional aqueous-aqueous membrane contactor (AAMC) process when treating ammonia feed of low concentrations, with the maximum water flux two orders of magnitude higher than ammonia.
研究领域:
环境工程
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化学工程
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2015
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IF 4.097
Hongmei Cao,Ailing Yang,Hua Li,Lele Wang,Shunpin Li,Jilie Kong,Xichang Bao,Renqiang Yang
Utilizing as-prepared hollow cuprous oxide (Cu 2 O) nanospheres, a simple nonenzymatic glucose amperometric sensor was fabricated. The structure and morphology of hollow Cu 2 O nanospheres were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Electrocatalytic activity of Cu 2 O was investigated by cyclic voltammetry (CV) and chronoamperometry, exhibiting a direct for the oxidation of glucose in an alkaline medium at 0.6 V. This constructing sensor was applied in detection of glucose with a detection limit of 0.41 μM, a linear detection range from 1.25 to 37.5 μM and with a high sensitivity of 2038.2 μA mM −1 cm −2 . Due to superior catalytic performance and low cost of hollow Cu 2 O nanospheres, it shows great potential in applications for direct sensing of glucose.
研究领域:
生物传感技术
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材料科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Yan Li,Hong Wu,Yongheng Yin,Li Cao,Xueyi He,Benbing Shi,Jinzhao Li,Mingzhao Xu,Zhongyi Jiang
The construction of efficient proton transport channels in ion-conductive membranes is crucial to proton exchange membrane fuel cells (PEMFCs). Herein, zwitterion-functionalized covalent organic framework (Z-COF) with both ammonium groups and sulfonic acid groups was synthesized and blended with Nafion to prepare Nafion/Z-COF composite proton exchange membranes. The polymer-like feature of the Z-COF imparted favorable interactions between Z-COF and Nafion, and thus promoted the dispersion of Z-COF and the reorganization of ion clusters. The incorporation of Z-COF enhanced water retention property and the sulfonic groups on Z-COF provided additional proton-transport sites within the membranes. As a result, the low-energy-barrier paths for proton transport were created. The composite membranes with 10 wt% of Z-COF exhibited the highest proton conductivity of 0.22 S cm −1 at 80 °C and 100% RH, which was 57.1% higher than that of recast Nafion membrane. The enhanced proton conductivity also afforded the composite membrane a 45.7% increase in maximum power density of single fuel cell at 80 °C and 50% RH. The effects of Z-COF loading on membrane morphology, polymer chain mobility, thermal stability, water uptake and dimensional stability were also investigated.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Mohamed M. Abdelaal,Mohammad Alkhedher
The energy storage market necessitates an increase in the specific capacity of battery materials, particularly cathodes, to meet growing demands. Manganese (Mn) substitution of lithium iron phosphate (LFP) cathodes presents a promising avenue, offering high specific capacity and operability at elevated voltages. However, during cycling, the dissolution of Fe/Mn ions into the electrolyte leads to capacity fading. In this study, we enhance the specific capacity of LFP by Mn substitution in the iron position at various ratios (0.1, 0.2, 0.3, and 0.4). LiFe 0.6 Mn 0.4 PO 4 exhibits the highest capacity of 159.1 mAh g -1 at 0.1C with an initial Coulombic efficiency of 97.9 %. This improvement stems from an enhanced lithium diffusion coefficient, increasing from 1.86 × 10 –14 cm 2 s -1 for pristine LFP to 2.46 × 10 –12 cm 2 s -1 for LiFe 0.6 Mn 0.4 PO 4 . However, LiFe 0.6 Mn 0.4 PO 4 demonstrates the poorest capacity retention among the substituted samples, reaching 78.4 % over 100 cycles due to severe Fe/Mn ion dissolution. To address this issue, we coat Mn-substituted LFP with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and lithiated Nafion (LN) polymer, which offer high electronic and lithium-ion conductivity, respectively. This coating layer enhances the capacity retention of LiFe 0.6 Mn 0.4 PO 4 to 90.1 % at 0.2C after 100 cycles, effectively mitigating active material loss during charge-discharge processes. This study demonstrates that PEDOT:PSS-LN can improve the electronic and ionic conductivity of cathode materials and maintain high capacity retention during cycling.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）