IONICS
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2021
·Vol. 27
·期 12
·5297-5308
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IF 2.817
qian Weina,Guo Hui,Li Xiaorong,Zhang Gang,Zheng Jianbin,Li Zhi
In this study, we have introduced a three-dimensional polyaniline hydrogel (3D-PANIH) with incorporated Cu nanoparticles (CuNPs), which allows for facile fabrication of an electrochemical sensor for sensitive determination of nitrite. The value of this nanocomposite has been highlighted through the comparison of sensing property of the fabricated sensor with most other nitrite sensors reported recently. The sensing property of the sensor based on CuNPs/3D-PANIH nanocomposite was investigated by cyclic voltammetry and amperometric current–time. The electrochemical kinetics reveals that nitrite electrooxidation involves two electrons and two protons in an electrode reaction. The electrochemical sensor presented substantially enhanced electrocatalytic oxidation of nitrite in acidic medium, with an excellent sensitivity of 139.3 μA mM −1 cm −2 , a low detection limit of 0.07 μM, and a broad linear range (0.2–4300 μM). From a broader perspective, the present work may exploit the opportunities for a novel electrochemical sensing platform based on 3D-PANIH. Graphical abstract
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ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Hui Zhi,Xiaobo Zhang,Fengya Wang,Peng Wan,Liang Feng
Flexible pressure sensors made of carbon materials have been used in electronic skins (e-skins), whose performance can be enhanced if composite sensing materials are used. Herein, an MXene/polyaniline/bacterial cellulose (MXene/PANI/BC) aerogel sensor has been fabricated through the self-assembly process between the MXene and one-dimensional active material. Combined with fewer-layer or single-layer MXenes, the as-fabricated aerogel could be used as the active layer of the pressure sensor, monitoring tiny motion signals of finger bending, wrist bending, and pulse beating. Bluetooth wireless transmission could also be realized to monitor the real-time spatial pressure distributions on the mobile phone, making the aerogel-based sensor an ideal candidate in e-skins. Meanwhile, the aerogel-based sensor is sensitive toward NH3 due to the unique three-dimensional (3D) structure of the aerogel and the abundant terminal groups (such as −O, −OH, and −F) of the MXene in the system that ensure efficient electronic transfer for the sensing process and create active sites for the absorption with the target gas. This work offers a versatile platform to develop MXenes to fabricate 3D composite aerogels for high-performance flexible multiple sensors.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Chuang Wang,Yingzhan Li,Hou-Yong Yu,Somia Yassin Hussain Abdalkarim,Jinping Zhou,Juming Yao,Lina Zhang
“Green” solvent-dissolved cellulose enables functional reuse of waste cotton fabrics. This work will not only achieve high-value utilization of biomass but also overcome microplastic pollution. There is a significant challenge in the continuous meter-scale synthesis of sensing fibers for commercial applications with high productivity. Herein, waste cellulose fabrics was recycled by the NaOH/urea system to produce regenerated cellulose (RC) and then cornlike polyaniline (PANI) was anchored on the RC fibers by in situ polymerization of aniline through continuous meter-scale wet-spinning. In our findings, the morphologies and possible growth of PANI layers on the RC surface can be tailored by various ammonium persulfate (APS) contents in a coagulation bath. Especially, composite fibers (PC0.5) exhibited superior electrical conductivity and highly sensitive responsiveness to organic vapors and human motions including exhalation/inhalation, finger, and wrist joints. Further, the possible sensing mechanism of cornlike PC0.5 has been proposed, and its GF value is 23.8. This study realized the conversion from cheap waste fibers to high-value conductive fibers with excellent performances for multifunctional wearable sensors and energy devices via a simple and “green” method.
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JOURNAL OF ORGANIC CHEMISTRY
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2021
·
IF 4.354
Yan-Ling Song,Bei Li,Zhen-Biao Xie,Dan Wang,Hong-Mei Sun
Iron-catalyzed oxidative amination of benzylic C(sp3)–H bonds with anilines bearing electron-withdrawing groups (EWGs) or electron-donating groups (EDGs) is realized based on simple variations of N-substituents on imidazolium cations in novel ionic Fe(III) complexes. The structural modification of the imidazolium cation resulted in regulation of the redox potential and the catalytic performance of the iron metal center. Using DTBP as oxidant, [HItBu][FeBr4] showed the highest catalytic activity for anilines bearing EWGs, while [HIPym][FeBr4] was more efficient for EDG-substituted anilines. This work provides alternative access to benzylamines with the advantages of both a wide substrate scope and iron catalysis.
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MICROCHIMICA ACTA
·
2021
·Vol. 189
·期 1
·1-7
·
IF 5.833
Xia Chunqiu,Huang Wenying,Kang Xiutang,Chen Pingyun,You Longjie,Guo Liangqia
Mo 5 N 6 nanosheets were synthesized by a nickel-induced growth method and were found to possess peroxidase-like activity in acidic condition and catalase-like activity in weak basic condition. In acidic condition, Mo 5 N 6 nanosheets can catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by H 2 O 2 to form a blue color product (TMB OX ). At the co-existence of 4-aminophenol (4-AP), 4-AP can react with H 2 O 2 and TMB OX , resulting in the decrease of TMB OX and the fading of blue color. Therefore, a facile, sensitive colorimetric method for the quantitative detection of 4-AP was developed. The linear range for 4-AP was 1.0 to 80.0 μmol⋅L ‒1 ( R 2 = 0.999), and the detection limit was 0.56 μmol⋅L ‒1 based on 3 σ / k . Resorcinol, aniline, humic acid, and common ions and anions in surface water did not interfere the determination of 4-AP. This colorimetric method was applied to measure the 4-AP in real water sample from Wulong River in Fujian Province of China. The relative standard deviation for the determination of 4-AP was ranged from 0.03 to 1.88%, and the recoveries from spiked samples were ranged between 99.2 and 107.6%. The determination results were consistent with those obtained by HPLC. Graphical abstract
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ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Junqi Wang,Wei Liu,Chunqing Wang
Black phosphorus (BP) is an attractive anode material for advanced lithium-ion batteries due to its intrinsic layered structure, high electrical conductivity and large theoretical capacity. However, the formation of an unstable solid-electrolyte interphase (SEI) and electrode pulverization caused by volume expansion during the lithiation-delithiation process have led to poor cycling stability. In this work, we report a ternary hybrid anode (BP-GO-PANI) prepared by a simple solvothermal reaction of BP and graphene oxide (GO), with the output coated in situ by polyaniline (PANI). The PANI coating ensures the stability of SEI and maintains smooth Li + transmission paths, which enhances the initial Coulombic efficiency and rate performance. Furthermore, GO and PANI mitigate the volume expansion of electrodes and thereby improve cycling stability. The hybrid anode has a high reversible specific capacity of 652 mAh g −1 at 0.1 A g −1 after 50 cycles, which is 6.2 times higher than that of origin BP electrode. Furthermore, the hybrid anode also obtains credible cycle stability with a retained capacity of 958 mAh g −1 at 5 A g −1 after 2000 cycles. This convenient multi-step compounding method opens a pathway for the development of stable, high-performance alloyed anode materials.
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ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Yang Li,Rui Han,Min Chen,Xiqin Yang,Yinan Zhan,Lei Wang,Xiliang Luo
Biofouling has been a substantial burden on biomarker analysis in complex biological media, leading to poor sensitivity and selectivity or even malfunction of the sensing devices. In this work, an electrochemical biosensor with excellent antifouling ability and high stability was fabricated based on amyloid-like bovine serum albumin (AL-BSA) crosslinked with the conducting polymer polyaniline (PANI). Compared with the crosslinked conventional bovine serum albumin (BSA), the crosslinked AL-BSA exhibited enhanced antifouling capability, and it was able to form an effective antifouling film within a significantly short reaction time. With further immobilization of immunoglobulin M (IgM) antibodies onto the prepared AL-BSA surface via the formation of amide bonds, an electrochemical biosensor capable of assaying IgM in human serum samples with superior selectivity and sensitivity was constructed. The biosensor exhibited excellent antifouling performance even in 100% human serum, a low limit of detection down to 2.32 pg mL–1, and acceptable accuracy for real sample analysis compared with the standard enzyme-linked immunosorbent assay for IgM detection. This strategy of using AL-BSA to construct antifouling sensing interfaces provided a reliable diagnostic method for the detection of a series of protein biomarkers in complex biological media.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ming Zhu,Tao Yang,Liting Wang,Mengyuan Xiong,Wenjun He,Yaowei Chen,Weili Deng,Xiaoyan Li
Stretchable electronics have attracted great interest due to their mechanical flexibility similar to tissues. In this paper, a superstretchable fiber membrane is designed based on step by step assembly of electrospun poly(styrene-ethylene/butylene-styrene) (SEBS), carbon nanotubes (CNTs) and electropolymerized polyaniline (PANi). The prepared soft membrane has a hierarchical micro-nano structure, forms a good interface with the triblock copolymer fiber, and shows good electromechanical performance. The electrical conductivity of the membrane is about 2.40 S·cm −1 , the tensile strength and the maximum tensile strain can reach 8.2 MPa and 1200% respectively, while the Young’s modulus is only about 0.26 MPa. The conductivity of the prepared membrane remains stable after 1000 cycles, and the fractured composite membrane can be healed by hot pressing. In addition, this stretchable composite membrane has been successfully demonstrated to detect various human motions, and can even work underwater. Our results provide a simple and controllable method to achieve the stable soft stretchable electronics with large strain, and demonstrate promising potential in the expanded application of human motion monitoring.
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COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Yunpeng Qu,Zhongyang Wang,Peitao Xie,Zongxiang Wang,Runhua Fan
Metacomposites have drawn considerable attention due to their enticing prospect in electronic and dielectric devices, which meanwhile unfortunately suffered from extremely high negative permittivity ( ε' < 0). Herein, we put forward a strategy to suppress the plasma oscillation in metacomposites and thereby constrain the value of negative permittivity by introducing the semiconductive polyaniline to construct polyaniline/nickel (PANI/Ni) metacomposites. Weakly negative permittivity was obtained at a magnitude of 10 2 over the whole test frequency band, which is remarkably lower by at least three orders of magnitude than that of most metacomposites. The ε′ -negative value was resultantly fine-tuned by about 10 2 with equally adjusting Ni content. Lorentz and Drude models were employed to describe ε′ -negative spectra, indicating that both dielectric resonance and plasma oscillation contributed to negative permittivity. Negative susceptibility of ε′ -negative materials was mainly ascribed to high-frequency diamagnetic response within Ni networks. The well-designed PANI/Ni metacomposites with weakly and fine-tuning negative permittivity can greatly benefit the practical applications on electromagnetic (EM) shielding, microwave absorption and novel EM sensors.
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Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 38
·21695-21702
·
IF 12.732
Xiaojie Shen,Guangyu Zhao,Xianbo Yu,Huihuang Huang,Ming Wang,Naiqing Zhang
Undesirable lithium dendrite growth limits the application of lithium metal anodes in high-energy storage batteries. Here, multifunctional SnSe–C composite modified 3D scaffolds are constructed to achieve dendrite-free lithium deposition. During the initial lithiation stage, the porous SnSe–C composite converts into a Li–Sn alloy and Li2Se by lithium reduction. The lithiophilic Li–Sn alloy exhibits a low nucleation barrier and realizes homogeneous lithium nucleation. The reductive product Li2Se with a high ionic conductivity facilitates lithium ion transport, which helps realizing the homogeneous lithium ion flux and reducing concentration polarization. Benefitting from the synergistic effect of the Li–Sn alloy and Li2Se, the Li/SnSe–C anode exhibits an ultralong lifespan over 1100 h with a low overpotential of 18 mV. In full-cell configurations with LiFePO4 cathodes, the Li/SnSe–C anode demonstrates enhanced rate capability and cycle stability with a high-capacity retention of 85% over 750 cycles. This work prepares multifunctional SnSe–C composite modified 3D scaffolds to regulate lithium nucleation and transport, which offers new insights and opportunities for developing dendrite-free lithium metal battery technology.
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Materials Today Chemistry
·
2021
·
IF 8.301
Ruiqi Li,Lixue Yang,Changqing Zhou,Guoli Zhang,Jiaxiang Tian,Wencong Wu
The loss of superhydrophobicity due to mechanochemical damage is critical for superhydrophobic surfaces, and rapid self-healing is significant in maintaining surface durability. Herein, a novel, fast, self-healing superhydrophobic sponge capable of all-weather heating was polymerized in an eco-friendly aqueous system and dip-coated using fluorine-free and non-toxic reagents. Benefiting from the photothermal and Joule-heating performance of polyaniline (PANI) and multiwalled carbon nanotubes (MWCNTs), all-weather heating could be achieved. The equilibrium surface temperature (EST) of the as-prepared sponge could rapidly reach 105°C under irradiation of 1.0 kW/m 2 for 20 s, and the EST exceeded 120°C with supplementary 18 V treatment. Impressively, after O 2 plasma etching for 1 min or after being immersed in hydrogen peroxide (H 2 O 2 ) solution for 24 h, the water contact angle (WCA) of self-healing superhydrophobic polyurethane (PU) sponge (SHSPS) can be restored to 155°C under simulated sunlight for 2 min because of the rapid migration of low surface energy polydimethylsiloxane (PDMS) chains, which is the fastest recovery achieved to the best of our knowledge. In addition, the modified sponge exhibited a significant antifouling capability for particulate contaminants and organic pollutants, extending service life. Our preliminary results demonstrated that the modified sponge prepared in the current work is fully qualified in multiple applications, including oil-water separation, viscous oil treatment, seawater evaporation and desalination, de-icing, and anti-icing.
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BIOMACROMOLECULES
·
2021
·
IF 6.988
Yingqi Heng,Genhui Teng,Yang Chi,Dongying Hu
The biomass-based inter-transmission network architecture is expected to act on all-solid-state supercapacitors (ASSSCs) by building excellent conductive paths and achieving high ionic conductivity to promote their development as future electronic devices. Here, biomass-derived hybrid organogel electrodes constructed by incorporating polyaniline (PANI) into cellulose/dealkaline lignin (C/DL) film architectures exhibit an impressive specific capacitance (582 F g–1 at 1 A g–1) due to the effective dispersion and doping of PANI. Moreover, the specific capacitance of the best C/DL-PANI electrode is nearly 19 times higher than that of a cellulose-PANI electrode, which is attributed to the contribution of DL to the pseudocapacitance. ASSSCs assembled using the C/DL-PANI electrodes and the DL gel electrolyte exhibit excellent specific capacitance (344 F g–1 at 1 A g–1), Coulombic efficiency (∼100% for 5000 cycles), cycle stability (85.7% for 5000 cycles at 1 A g–1), and energy density (58.1 W h kg–1 at 0.5 kW kg–1). The ASSSCs showed a comparable or even higher electrochemical performance than the reported PANI-based or biomass-based ASSSCs, which can be due to the conductive network of the biomass-derived electrodes, the migration of ions between the electrodes through the gel electrolyte ion pathway, and the interfacial synergy. This innovative work paves the way for the development of ASSSC applications based on biomass materials.
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