Gels
·
2025
·Vol. 11
·期 11
·853
·
IF 5.3
Shiqi Li,Chao Sun,Meihui Gao,Haiyan Ma,Longbin Xu,Xinyu Li
Real-time sweat pH monitoring offers a non-invasive window into metabolic status, disease progression, and wound healing. However, current wearable pH sensors struggle to balance high electrochemical sensitivity with mechanical compliance. Here we report a stretchable fiber-integrated pH electrode based on a polyaniline-phytic acid-polyvinyl alcohol (PANI-PA-PVA) hydrogel, which combines mechanical elasticity with enhanced electrochemical performance for continuous sweat sensing. Freeze–thaw crosslinking of the hydrogel forms a porous interpenetrating network, facilitating rapid proton transport and stable coupling with dry-spun elastic gold fibers. This wearable device exhibits an ultra-Nernstian sensitivity of 68.8 mV pH−1, ultra-fast equilibrium (<10 s within the sweat-relevant acidic window), long-term drift of 0.0925 mV h−1, and high mechanical tolerance (gel stretch recovery up to 165%). The sensor maintains consistent pH responses under bending and tensile strains, yielding sweat pH measurements at the skin surface during running that closely match commercial pH meters (sweat pH range measured in test subjects: 4.2–5.0). We further demonstrate real-time wireless readouts by integrating elastic gold and Ag/AgCl fibers into a three-electrode textile structure. This PANI-PA-PVA hydrogel strategy provides a scalable material platform for robust, high-performance wearable ion sensing and skin diagnostics.
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DOI
PubMed
高影响因子
Nano Energy
·
2020
·
IF 16.602
Shengrui Yu,Yongkang Zhang,Zhaohan Yu,Jiaqi Zheng,Yunming Wang,Huamin Zhou
Limited by the inherent properties of being difficult to be polarized due to its high resistance, PVDF bulk material with high β-phase content is hard to obtain by conventional methods which are suitable for membrane material. Herein, a novel strategy is proposed for the mass production of high-performance β-PVDF-based piezoelectric and triboelectric hybrid nanogenerator (PTNG) employing large-scale PVDF films or bulks by using liquid nitrogen to induce a phase transition and in-situ doped conductive polyaniline (PANI). Polyvinylidene fluoride-trifluoroethylene (PVDF-TrFE) with high piezoelectric coefficient , filled with PANI as a conductive material and sodium carboxymethyl cellulose (SCMC) for increasing porosity, is hot pressed to obtain a composite piezoelectric polymer for PTNG. The subsequent “quenching” process of the piezoelectric polymer allows its high content of β-phase, which in turn makes the PTNG exhibit excellent piezoelectric properties . The optimal output of the PTNG, with a β-phase content of up to 71%, reaches 246 V and 122 μA at the frequency of 30 Hz and pressure of 0.31 MPa, and the power density is calculated to be 6.69 W/m 2 . Moreover, the PTNG can directly light up 119 blue light-emitting diodes (LEDs) with a size of 3 mm in series. The excellent performance verifies the reliability and accuracy of the method, that is, the β-phase transformation of disordered amorphous PVDF occurs at low temperature and high-rate quenching, and PANI opens the channel for carriers to move charge in the bulk material. This innovative method presented here is a simple and efficient approach for preparation of bulks with high β-phase and low internal resistance, which undoubtedly provides a feasible direction for the industrialization of high-performance PENGs.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 3
·1668-1678
·
IF 3.361
Dechao Chen,Sai Ma,Xiaofan Zhang,Xuedong Wang,Ming Gao,Jieyi Li,Huili Wang
The reported ionic liquid (IL)-based magnetic effervescent tablets are a result of direct addition of ILs and magnetic nanoparticles (MNPs). In effervescent reaction-enhanced microextraction procedures, the dissociation between ILs and MNPs easily leads to loss of ILs due to aqueous solubility, thereby decreasing the extraction efficiency. Herein, we attached a hydrophilic IL ([BMIM]Br) onto the surface of NiFe2O4@SiO2@polyaniline (NiFe2O4@SiO2@PANI-IL) to prepare novel core–shell-like multi-layer nanocomposites. Magnetic effervescent tablets were composed of Na2CO3 as an alkaline source, tartaric acid as an acidic source and as-synthesized nanocomposites as an extractant. The nanocomposites were used in an effervescent reaction-enhanced magnetic solid-phase extraction (ERMSE) for the extraction of four organophosphorus pesticides (OPPs) in fruit juices prior to HPLC-DAD detection. Under optimized conditions, this method provided low limits of detection (0.06–0.17 μg L−1), high recoveries (80.6–97.3%) and excellent precision (1.1–5.2%) for OPP quantification in five fruit juices. Notably, the three-layer core–shell nanocomposites were efficiently recycled for at least eight extraction cycles with a recovery loss of <10%. The novelty of this study lies in: (1) for the first time, the ILs-based hybrid magnetic nanocomposites were prepared with appropriate pore size/volume and more active sites for OPPs; (2) the combination of the nanocomposites with effervescent tablets realizes rapid dispersion of CO2 bubbles, and convenient magnetic separation/collection into one synchronous step; and (3) due to there being no requirement of electrical power, it is feasible for use in field conditions. Thus, the ERMSE method has excellent potential for conventional monitoring of trace-level OPPs in complex fruit juice matrices.
研究领域:
分析化学
·
环境科学
·
食品科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Min Zhang,Baolong Li,Yu Du,Gaojian Zhou,Yanyan Tang,Yanfen Shi,BiYu Zhang,Zhou Xu,Qingli Huang
The preparation and construction of novel nanostructures as targeting theranostic is of great significance for diagnosis and treatment of tumor. Herein, a novel PANI/ [email protected] @MnO 2 (PPAuMns) yolk-shell enzymatic theranostic agent was fabricated firstly via in situ deposition of Au nanoparticles (Au NPs) and reduction of KMnO 4 on the surface of PANI/PPy nanocomposites. In addition to high biocompatible and biodegraded performance, PPAuMns possessed amazing tumor microenvironment (TME)-responsive O 2 generation capacity, magnetic resonance imaging (MRI) property, enzymatic activity and excellent photothermal conversion effect. Chemotherapeutics doxorubicin and folic acid (FA) were further loaded and decorated on it for targeted tumor therapy. Experiments in vitro and in vivo indicated that DOX-loaded [email protected] demonstrated excellent synergistic anti-tumor effect combining chemotherapy (CT), chemo-dynamic therapy (CDT) and photothermal therapy (PTT). This work offers a paradigm to design and construct tumor diagnosis and therapy platforms employing TME-responsive synergistic strategy of photothermal ablation, chemo-dynamic and chemotherapy.
研究领域:
纳米技术
·
生物医学工程
·
癌症治疗
·
材料科学
·
医学成像
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DOI
高影响因子
Micromachines
·
2026
·Vol. 17
·期 6
·695
·
IF 3.5
Yifei Wang,Yang Wang,Qing Liu,Gengchen Li,Jing Wang
Driven by the “Dual Carbon” goals, supercapacitors have become critical energy storage devices for new energy electric vehicles. In this paper, a ZnFe2O4@ZnCo2O4core–shell cathode was prepared by a hydrothermal method followed by high-temperature annealing, and an AC@PANI composite anode was synthesized through in situ polymerization. The materials were characterized by SEM, TEM, XRD, XPS, nitrogen adsorption–desorption and electrochemical tests. The ZnFe2O4rod-like core provides mechanical stability, whereas the ZnCo2O4nanosheet shell increases the specific surface area and exposes more active sites. The cathode delivers 2133 F/g at 1 A/g with 94.4% retention after 10,000 cycles. The anode reaches 398 F/g at 1 A/g. The cathode delivers 2133 F/g at 1 A/g with 94.4% retention after 10,000 cycles. The anode reaches 398 F/g at 1 A/g. The assembled ZnFe2O4@ZnCo2O4//AC@PANI hybrid supercapacitor works in a wide voltage range of 0–1.6 V. It exhibits a specific capacitance of 157 F/g at 1 A/g and a high energy density of 54.7 Wh/kg at a power density of 1600 W/kg. The device retains 91.4% of its initial capacity after 10,000 charge–discharge cycles. This study offers a promising strategy for high-performance automotive supercapacitors.
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DOI
PubMed
高影响因子
Journal of the American Chemical Society
·
2013
·
IF 10.677
An-Liang Wang,Han Xu,Jin-Xian Feng,Liang-Xin Ding,Ye-Xiang Tong,Gao-Ren Li
Low cost, high activity, and long-term durability are the main requirements for commercializing fuel cell electrocatalysts. Despite tremendous efforts, developing non-Pt anode electrocatalysts with high activity and long-term durability at low cost remains a significant technical challenge. Here we report a new type of hybrid Pd/PANI/Pd sandwich-structured nanotube array (SNTA) to exploit shape effects and synergistic effects of Pd-PANI composites for the oxidation of small organic molecules for direct alcohol fuel cells. These synthesized Pd/PANI/Pd SNTAs exhibit significantly improved electrocatalytic activity and durability compared with Pd NTAs and commercial Pd/C catalysts. The unique SNTAs provide fast transport and short diffusion paths for electroactive species and high utilization rate of catalysts. Besides the merits of nanotube arrays, the improved electrocatalytic activity and durability are especially attributed to the special Pd/PANI/Pd sandwich-like nanostructures, which results in electron delocalization between Pd d orbitals and PANI π-conjugated ligands and in electron transfer from Pd to PANI.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能量转换
·
催化
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DOI
高影响因子
Journal of Analytical Methods in Chemistry
·
2023
·
IF 2.6
Dexiang Feng,Lingzhi Chen,Ke Zhang,Shuangshuang Zhu,Meichen Ying,Peng Jiang,Menglan Fu,Yan Wei,Lihua Li
Herein, a method was developed for the sensitive monitoring of carcinoembryonic antigen (CEA) by gold nanoparticles dotted prussian blue@polyaniline core-shell nanocubes (Au NPs/PB@PANI). First, a facile low-temperature method was used to prepare the uniform PB@PANI core-shell nanocubes with the assistance of PVP, where PB acted as the electron transfer mediator to provide electrochemical signals, and the PANI with excellent conductivity and desirable chemical stability not only played the role of a protective layer to prevent etching of PB in basic media but also effectively improved electron transfer. Importantly, to further enhance the electrical conductivity and biocompatibility of PB@PANI and to further enhance the electrochemical signal and capture a large amount of Ab2, Au NPs were doped on the surface of PB@PANI to form Au NPs/PB@PANI nanocomposites. Subsequently, benefiting from the advantages of core-shell structure nanoprobes and gold-platinum bimetallic nanoflower (AuPt NF), a sandwich-type electrochemical immunosensor for CEA detection was constructed, which provided a wide linear detection range from 1.0 pg·mL−1 to 100.0 ng·mL−1 and a low detection limit of 0.35 pg·mL−1 via DPV (at 3σ). Moreover, it displayed a satisfactory result when the core-shell structure nanoprobe-based immunosensor was applied to determine CEA in real human serum samples.
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Shiliu Yang,Quanzhou Yin,Jiabiao Lian,Guochun Li,Yijun Wei,Qiyong Zhu
Polyaniline (PANi) has brought new enthusiasm in the field of aqueous Zn-ion batteries due to the unique nature of high conductivity, excellent structural flexibility, and fast ions de-/intercalation ability. However, the naked and densified PANi usually suffers from capacity fade and limited rate performance owing to the deprotonation of the polymer and imbalanced electron-ion transmission. Herein, a HCl-doped porous PANi electrode was prepared by electrodepositing the aniline monomer onto a porous carbon cloth (PCC), which plays an important role in elevating the loading mass and inducing porous structure of the PANi, thus enhancing the mass energy density and ions diffusion coefficient of the electrode; On the other hand, the HCl-doping could facilitate the charge delocalization and increase the conductivity of the PANi. Besides, a convertible behavior of the energy storage sites during charging-discharging processes was firstly observed for PANi, which should be responsible for the high-rate and cycling performance of the Zn-ion batteries, there is very small capacity decay from 170 mAh g −1 at 1 A g −1 to 161 mAh g −1 at 10 A g −1 , and 87 % of the initial the capacity can maintain after 2000 cycles at 5 A g −1 . Furthermore, the quasi-solid-state Zn-ion battery can also display superior performance, showing potential application of the PCC@PANi for wearable devices
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Sabarinathan Ravichandran,Narayanamoorthy Bhuvanendran,R. Selva Kumar,Putrakumar Balla,Sae Youn Lee,Qian Xu,Huaneng Su
A hybrid catalyst support anchoring a noble metal catalyst could be a promising material for building interfacial bonding between metallic nanostructures and polymer functionalized carbon supports to improve the kinetics of oxygen reduction reaction (ORR). This study successfully prepared a polyhedron nanostructured Pd and MoO 2 -embedded polyaniline-functionalized graphitized carbon nitride (PANI-g-C 3 N 4 ) surface using a chemical reduction method. The Pd–Mo/PANI-g-C 3 N 4 achieved an ORR activity of 0.27 mA µg −1 and 1.14 mA cm −2 at 0.85 V, which were 4.5 times higher than those of commercial 20% Pt/C catalyst (0.06 mA µg −1 and 0.14 mA cm −2 ). In addition, the Pd–Mo/PANI-g-C 3 N 4 retained ∼ 77.5% of its initial mass activity after 10,000 cycles, with only 30 mV half-wave potential reduction. Further, the engineered potential active sites in the catalyst material verified the significant improvement in the ORR activity of the catalyst with increased life-time, and theoretical calculations revealed that the synergistic effect of the catalytic components enhanced the ORR kinetics of the active sites.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ping-Ping Sun,Yu-Hang Zhang,Hongwei Shi,Fa-Nian Shi
Two new 3-dimensional (3D) 3d-4f bimetal organic frameworks (ZnCe-MOF and CuCe-MOF) were created through hydrothermal method. These MOFs have the similar formula (M 2 (imidazole) 2 Ce(H 2 O)(C 2 O 4 ) 1/2 (4,5-ida) 2 ·2(H 2 O), M = Zn, Cu; 4,5-ida: 4,5-imidazole dicarboxylate) and possesses monoclinic symmetry in the P2 1 /n space group. The electrodeposition method was used to in-situ coat polyaniline (PANI) to improve the electrical conductivity. As the electrode materials for supercapacitors in three-electrode system, the specific capacitance of CuCe-MOF@PANI-1 and ZnCe-MOF@PANI-1 electrodes can reach 724.4F g −1 and 713.2F g −1 at 1 A g −1 . Using the as-synthesized CuCe-MOF@PANI-1 heteorostructure as positive material, the assembled hybrid capacitor delivers an energy density of 87.45 Wh kg −1 and 58.05 Wh kg −1 at power density of 850 W kg −1 , demonstrating that the heteorostructure of MOF coated with PANI has promising applications in portable energy storage devices.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yanhua Liu,Yuanyue Li,Geoffrey I.N. Waterhouse,Chenchen Liu,Xiaohui Jiang,Zhiming Zhang,Liangmin Yu
A smart composite system based on thermosensitive polymers and photosensitive polyaniline (PANI) was constructed in this work, enabling efficient photo-driven adsorption and separation of anionic dyes within a short time. Thermosensitive copolymers (P(NIPAM-NVK)) of N -isopropylacrylamide (NIPAM) and N -vinylcarbazole (NVK) with adjustable low critical solution temperatures (LCST) were synthesized via a free radical copolymerization method. PANI was then composited with P(NIPAM-NVK) as a photothermal agent and dye adsorbent. The developed P(NIPAM-NVK)/PANI composite systems showed a rapid temperature increase under visible light irradiation, triggering the transition of P(NIPAM-NVK) from the sol state to a bulk gel state. Simultaneously, PANI and Congo Red (CR) anionic dye were efficiently encapsulated within the gel state of P(NIPAM-NVK) via intermolecular interactions, facilitating the rapid separation of aqueous CR through a direct solid–liquid process to yield clean water. The P(NIPAM-NVK 10 )/PANI 0.5 composite system afforded a removal efficiency > 98 % for CR (80 mg/L) within 5 min under visible light illumination. These findings hold great promise for the eco-friendly treatment of dye-containing wastewater.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wenling Wu,Haiqiang Wang,Puze Wang,Yang Cheng,Yuan Fang,Jiang Guo,Ting Zhao,Jianfeng Zhu
Two-dimensional (2D) layered MXene (e.g., Ti 3 C 2 T x ) is a research focus for zinc-ion capacitors (ZICs) electrodes due to its large specific surface area and high conductivity. However, its practical use is constrained by two critical bottlenecks: low theoretical capacitance and severe interlayer stacking, which directly reduce Zn 2+ transport efficiency and electroactive site accessibility. Constructing hierarchical structures addresses this by providing efficient Zn 2+ diffusion pathways, abundant electroactive sites, and excellent structural stability. This work prepared a 1D/2D hierarchical CoN-CNTs@PANI/Ti 3 C 2 T x composite via in-situ polymerization and electrostatic self-assembly. First, 1D CoN-CNTs provide polyaniline (PANI) polymerization sites to suppress its volume expansion and to form conductive channels, while spiky PANI shells offer extra faradaic sites. Second, 1D CoN- CNTs@PANI nanotubes prevent the restacking of 2D Ti 3 C 2 T x nanosheets, and the conductive framework of 2D Ti 3 C 2 T x nanosheets further suppresses PANI volume change to enhance rate capability and cycling lifespan. Third, the 1D/2D structure leverages synergies to accelerate interfacial charge/ion transport and reaction kinetics, critical for high-power ZICs. As a result, the three-electrode tests showed the electrode delivered 861.7 F g −1 at 0.5 A g −1 and retained 91 % capacitance after 5000 cycles at 10 A g −1 . The assembled CoN-CNTs@PANI/Ti 3 C 2 T x //Zn ZIC achieved 91.2 Wh kg −1 at 1600 W kg −1 , with 86 % capacity retention after 5000 cycles at 2 A g −1 . This work establishes an advanced MXene-based hierarchical design strategy for high-performance ZIC electrodes.
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高影响因子
危险品化学品经营许可证（带存储）