REACTIVE & FUNCTIONAL POLYMERS
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2024
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IF 4.5
Zhaoshun Zhang,Hui Zhang,Qi Zhang,Yuanyuan Ye,Yulong Zheng,Xueqin Zuo,Qun Yang,Huaibao Tang,Shaowei Jin,Guang Li
Solar desalination has received great attention as an environmentally friendly and cost-effective way to desalinate seawater. In this paper, a melamine sponge composite polypyrrole (MSPPy) evaporator was prepared by in-situ polymerization of Pyrrole (Py) on a melamine sponge (MS). PPy has an efficient light absorption ability. The large aperture network structure of MS can realize multiple reflections of light and greatly increase the absorption of light. Their synergistic effect makes the light absorption efficiency of the MSPPy evaporator reach 96.97%. Under one sun, the average evaporation rate of 1.886 kg⋅m −2 ⋅h −1 and energy conversion efficiency of 96.8% were achieved during 10 h. Moreover, the evaporator has an edge-priority crystallization function, which enables it to work for a long time in a high-salt environment. It works continuously for 12 h in simulated seawater with a salinity of 20% without further accumulation of salt crystals on its surface. More important, it can rapidly diffuse accumulated salt into the bulk water at night. This study provides a new idea for the application of solar steam generation technology in high-salt wastewater treatment.
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Journal of Energy Storage
·
2024
·
IF 8.9
Wenyu Bai,Guangpeng Ma,Xinpu Zhou,Tongtong Gao,Yu Luo,Di Yu,Shuang Wang
Traditional two-dimensional transition metal carbides/nitrides (MXene) have gained much academic concern due to their excellent physicochemical properties, but their susceptibility to self-stacking leads to poor cyclic stability. In this paper, an MXene-based electrode active material was successfully prepared. The generated modified PPy (g-PPy) increases the active site, increases the accessibility of ions, and can give full play to the pseudocapacitance. By the combination of modified PPy (g-PPy) nanoparticles with pseudocapacitive behavior polymerized in situ on sulfonated cellulose (SC) and MXene , not only the electrochemical performance was improved by exploiting the synergy between different electrode materials and different energy storage mechanisms, but also the MXene as a skeleton limited the volume expansion and contraction of PPy during charge/discharge cycles and the g-PPy and SC composites (g-PPy@SC) as a spacer supported the MXene layer, resulting in much higher cycle stability. Cycle stability of 98.4 % even after 10,000 cycle tests. In addition, a symmetric supercapacitor assembled from this electrode material maintains a stability of 84.4 % under 10,000 cycles at a low temperature of −40 °C. Therefore, this study provides a feasible method for the preparation of MXene-based electrodes with high cycling stability.
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Advanced Fiber Materials
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2024
·
IF 17.2
Liu Hua,Tian Gongwei,Zhao Qinyi,Chen Jianhui,Liu Yan,Liang Cuiyuan,Qi Dianpeng
The high impedance caused by the lack of interfacial hydrogel in dry electrodes seriously affects the quality of acquired electrophysiological signals. Although there are existing strategies to reduce impedance with micro–nanostructures, achieving stretchable and breathable electrodes while ensuring low impedance is extremely challenging. Herein, we successfully prepared a dry textile electrode (nanomesh film (NF)-ZnO–polypyrrole (PPy)) with low impedance, high stretchability, and breathability. Wrinkle-nanorod coupled microstructures are constructed to increase the effective surface area and roughness of NF-ZnO–PPy electrode, achieving an exponential reduction in impedance compared with the smooth textile dry electrode (15.64 kΩ·cm −2 at 10 Hz, approximately 1/6 of the lowest impedance of reported electrodes). Simultaneously, the wrinkled structure formed by pre-stretching improves electrode’s stretchability (up to 910% strain) and cycle stability (R/R 0 is within 1.08 after 1000 cycles at 30% strain). Furthermore, the NF-ZnO–PPy electrode has excellent breathability (2233.52 g·m −2 ·d −1 ) and good biocompatibility. Finally, as a proof of concept, the 16-channel NF-ZnO–PPy electrode can record electromyography signals in different states and parts of body for a long time ((22.03 ± 0.76) dB, which is twice that of the commercial electrode). Notably, we employ ZnO nanorods as a template to reduce impedance. This template strategy overcomes complex and expensive micro–nanomanufacturing technologies (photolithography, laser processing, etc.) and can be suitable for most flexible substrates, showing great potential in the field of soft electronics. Graphical Abstract
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Xin-Xin Chen,Yu-Xiong Ju,Bei Zhang,Xiao-Rui Ge,En-Jiang Liu,Dong-Yang Zhang,Jun Wang,Xiao-Hui Yao,Wei-Guo Zhao,Tao Chen
Most of the developed flexible hydrogel supercapacitors struggle to maintain their electrochemical stability and structural integrity under tensile strain. Therefore, developing a flexible supercapacitor with excellent mechanical properties and stable electrochemical performance under different strains remains a challenge. Based on the previous cartilage-like structure, we designed a new coarse nanofiber bundle and ordered network. A coarse nanofiber bundle and ordered network skeleton was constructed by directional freezing and filled with polyvinyl alcohol (PVA) to serve as a soft matrix to prepare PVA-SNF-CNTs-PPy-3 hydrogel electrode, which has high tensile strength (6.22 MPa) and fatigue threshold (8759.8 J/m 2 ). In addition, the loading of carbon nanotubes and polypyrrole onto the SNF-ordered network enabled the conductive material to form an ordered conductive energy storage network along the skeleton, providing an area-specific capacitance of up to 23.96 F/cm 2 . The coarse nanofiber bundle and ordered network provided supercapacitors with the least capacitance consumption under 150 % deformation, and the capacitance retention was >98.2 %. After repeated stretching (3000 times), the capacitance remained >91.45 %. This study provides new ideas for the development of flexible supercapacitors with high capacitance and high mechanical reliability.
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PubMed
高影响因子
npj Flexible Electronics
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2024
·Vol. 8
·期 1
·1-10
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IF 12.3
Wang Chenhao,Wang Zhengyu,Wei Wei,Zhang Zhenjie,Li Anne Ailina,Huang Guanghao,Li Xian,Ge Shuzhi Sam,Zhou Lianqun,Kong Hui
As a stress hormone existing in the human body, cortisol can reflect the psychological stress and health status in daily life, and is a potential biomarker of the body’s stress response. To effectively collect sweat and accurately identify the target, this paper reports a flexible wearable cortisol detection device with outstanding reliability and sensitivity. Molecular imprinted polymer (MIP) ensures cortisol specificity. And carbon nanotubes (CNT) on electrodes increase sensitivity, expanding the detection range to 10 −3 to 10 4 nM, with sensitivity at 189.2 nA/lg(nM). In addition, porous chitosan hydrogel (PCSH) collects sweat effectively, its adhesive properties and 80% swelling rate offer a low-cost alternative to microfluidics. Flexible printed circuit board (FPCB) and serpentine electrode (SE) ensure device durability. This non-invasive, highly sensitive device offers a novel method for mental stress monitoring and clinical diagnosis, advancing human physiological state monitoring.
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RSC Advances
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2024
·Vol. 14
·期 12
·8445-8453
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IF 3.9
Xiaoyun Huang,Zhiming Liu,Weijian Zeng,Xiaoyu Ma,Yu Zhang,Muye Li,Jiutong Sun,Sheng Mao,Li Bian
Fenton catalytic medicine that catalyzes the production of ·OH without external energy input or oxygen as a substrate has reshaped the landscape of conventional cancer therapy in recent decades, yet potential biosafety concerns caused by non-safety-approved components restrict their clinical translation from the bench to the bedside. Herein, to overcome this dilemma, we elaborately utilizate safety-approved hetastarch, which has been extensively employed in the clinic as a plasma substitute, as a stabilizer participating in the copper chloride-initiated polymerization of pyrrole monomer before loading it with DOX. The constructed DOX-loaded hetastarch-doped Cu-based polypyrrole (HES@CuP-D) catalyzes the excess H2O2 in tumor cells to ·OH through a Cu+-mediated Fenton-like reaction, which not only causes oxidative damage to tumor cells but also leads to the structural collapse and DOX release. Additionally, HES@CuP-D together with laser irradiation reinforces tumor killing efficiency by hyperthermia-enhanced catalytic activity and -accelerated drug release. As a result, the developed HES@CuP-D provides a promising strategy for Fenton catalytic therapy with negligible toxicity to the body.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yuxin Shi,Libo Tong,Jinghui Chu,Xiangjun Li,Bing Zhang,Kuaishe Wang
The existence of intrinsic defects in organic coating easily causes the degradation of protective ability during long-term corrosion process. A novel two-dimensional MXene (Ti 3 C 2 ) nanofiller can effectively reduce the defect density and contribute to the enhancement of anticorrosion performance, while its high conductivity may accelerate the galvanic corrosion between the organic coating and underlying substrate. In this work, a kind of three-dimensional (3D) Ti 3 C 2 MXene/polypyrrole composites (TPC) hybrid epoxy (EP) coating has been successfully fabricated on Mg alloy , which exhibits the excellent corrosion resistance and antistatic performance. The enhanced conductivity and synergistic barrier/passivation effect enable the Ti 3 C 2 MXene/polypyrrole composites with low surface resistance and excellent anticorrosion ability. Based on the electrochemical tests, the TPC/EP coating possesses remarkable impedance value with 7.73 × 10 10 Ω cm 2 after immersion for 14 days, representing the ability to extend service life due to the excellent physical barrier of Ti 3 C 2 nanosheets and the migration of electrochemical interface related to electronic transmission derived from polypyrrole (PPy) nano-particles. Moreover, the surface resistivity of the obtained coating is reduced to 2.76 × 10 8 Ω, which can be ascribed to the transmission effect of electrolyte ions through interlayer of Ti 3 C 2 /PPy network structure, and thus improving its antistatic performance. This work not only highlights the application of 2D MXene material as effective anticorrosion filler, but pave a new avenue for the development of organic/inorganic hybrid coating of Mg alloy or other metallic materials.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Mingxing Li,Xiaolan Liang,Peiying Xie,Chunzhi Zhang,Yunhua Chen,Chaoyang Wang,Li Zhou,Tao Wang,Hongxia Liu
Solar-powered interfacial evaporation is a developing and sustainable technique increasingly utilized in desalination and wastewater purification. This technology involves the creation of cellulose nanofiber (CNF)/polylactic acid (PLA) composite aerogels through the Pickering emulsion approach. Self-floating aero-hydrogel ( E -VGP) with a hierarchical porous structure was formed on a viscous mixture containing polyvinyl alcohol (PVA), peach gum polysaccharide (PGP), and polypyrrole (PPy) via an in-situ polymerization process. Furthermore, by modifying the hydrolysis time of PGP with a hyperbranched polyhydroxy structure, VGP hybrid hydrogels of varying microscopic molecular sizes were produced. Additionally, solar vapor generators (SVG) with diverse macroscopic structures were fabricated using molds. The V8G4-12hP0.2 hybrid hydrogel, synthesized using PGP hydrolyzed for 12 h, exhibited an evaporation enthalpy of water at 1204 J g −1 . This capacity effectively activates water and enables low enthalpy evaporation. Conversely, the macrostructural design allows the cylindrical rod raised sundial-shaped structure of SVG3 to possess an expanded evaporation area, minimize energy loss, and even harness additional energy from its nonradiative side. Consequently, this micro-macrostructural design enables SVG3 to attain an exceptionally high evaporation rate of 3.13 kg m −2 h −1 under 1 Sun exposure. Moreover, SVG3 demonstrates robust water purification abilities, suggesting significant potential for application in both desalination and industrial wastewater treatment.
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Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-20
·
IF 31.6
Liu Yu-long,Zhu Ting-yu,Wang Qin,Huang Zi-jie,Sun De-xiang,Yang Jing-hui,Qi Xiao-dong,Wang Yong
Hierarchical melamine foam (MF)/polypyrrole (PPy) nanowire arrays (MF@PPy) were fabricated by electrochemical polymerization.
The 3D porous PPy micro-skeleton and the 1D PPy nanowire arrays imparted the MF@PPy foams with high electromagnetic interference shielding performance of 19,928.57 dB cm 2 g −1 via multiple attenuations.
The PPy nanowire arrays achieved multifunctional integration including hydrophobicity, thermal insulation, and dynamic infrared thermal camouflage properties.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Fei Wang,Yuliang Zhang,Mengyang Cong,Ting Shu,Ying Qin,Yanhua Lei,Miranda Liu,Xiaobo Chen,Yi Lin,Zecheng Qian
The continual optimization and advancement of solar desalination technology represent an ongoing focal point in addressing the persistent challenge of freshwater scarcity. In the solar evaporator , subjected to high concentrations of saltwater and intense solar irradiation , as well as other demanding operational conditions, the presence of salt accumulation at the photothermal interface inevitably diminishes both the evaporation efficiency and the service life of the photothermal evaporator. In this study, we have successfully coated polypyrrole with carbon nanopowder (C), iron nanopowder (Fe), boron nitride (BN), boron carbide (B 4 C), molybdenum disulphide (MoS 2 ), and molybdenum carbide (Mo 2 C) through in-situ polymerization, and have assembled these coated materials with blends of polyvinyl alcohol/poly (vinylidene fluoride), creating an innovative amphiphilic photothermal composite film . The resulting thin-film evaporator has achieved an impressive 94.7 % evaporation efficiency under 1 sun irradiation. Introducing perforations on the film evaporator's surface further improves efficiency, reaching approximately 87.0 % under prolonged exposure to high salinity (20 %) conditions. This improvement is attributed to the increased water pathway facilitated by the perforations, preventing salt particle deposition on the evaporator's surface and significantly enhancing desalination efficiency.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Yujie Zhang,Ning Cai,Yuehan Wang,Hang Wang,Juanqin Xue
Capacitive deionization (CDI) technology holds immense promise for the effective removal of copper ions from solution medium. However, the widespread application of CDI is hindered by limitations arising from the electrode formation process, which impacts the electrode’s mass transfer and adsorption performance. In pursuit of refining the electrode formation process, this study employs a one-step simultaneous electrospinning and electropolymerization method to fabricate PPy/C-HCPs composite electrodes. The results indicate that the fabricated PPy/C-HCPs composite electrode possesses a high specific surface area of 458.98 m2/g, which is 1.83 times that of the electrode prepared using the traditional electrodeposition method (251.26 m2/g). Furthermore, the maximum adsorption capacity for Cu2+ reaches 82.83 mg/g, marking a 2.19-fold enhancement compared to electrodes prepared through the same electrodeposition process (37.81 mg/g). Moreover, even after 1000 repetitive scans, the electrode exhibits exceptional cyclic stability, with only a marginal 1.42% decrease in specific capacitance. This study introduces a streamlined process for the preparation of high-performance electrode materials, providing a foundation for the shaping applications of polypyrrole composite electrode. Additionally, it presents a distinctive approach for the preparation of electrodes for CDI and supercapacitors, offering a unique perspective in the field.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xin Xu,Ximing Guo
Dopamine (DA), uric acid (UA), and ascorbic acid (AA), three similar electroactive biological small molecules, generally coexist in human serum, causing serious interference when detected separately. In order to realize the simultaneous detection of DA, UA, and AA, three similar electroactive biomolecules, through the electrochemical sensing platform based on 2D Cu-TCPP MOFs nanofilms, DA molecules were successfully detected and optimized the detection conditions according to our previous detection methods for UA and AA. The results displayed the perfect electrochemical response signal of DA, excellent linear correlation between current intensity and DA concentration, LODs, repeatability, and stability. The electrochemical potential (E pa ) of UA oxidation peak was intermediate between E pa of AA and DA oxidation peak, the response current intensity of UA oxidation peak continuously decreases with increases of UA concentration. The response current intensity of DA and AA oxidation peak on both sides of UA gradually increases with the increase of DA and AA concentration. On the other hand, there is a significant difference in the oxidation potential difference between adjacent substances DA, UA, and AA (ΔE AA-UA = 141 mV, ΔE UA-DA = 167 mV, and ΔE AA-DA = 308 mV), which will play a decisive role in the simultaneous detection of DA, UA, and AA based on 2D Cu-TCPP MOFs/GCE electrochemical sensing platform. Therefore, the electrochemical platform based on 2D Cu-TCPP MOFs nanofilms is more conducive to the simultaneous detection of DA, UA, and AA with high selectivity, ultra-sensitivity, and ultra-distinguishability.
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