DESALINATION
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2024
·
IF 8.3
Ting Shu,Yuliang Zhang,Xiahui Liu,Zhuo Liu,Ying Qin,Fei Wang,Xueting Chang,Dongsheng Wang,Lihua Dong,Xiaobo Chen,Xijia Yin,Zecheng Qian
Solar interfacial evaporation technology is an effective and sustainable method for seawater desalination. It is crucial to achieve high photothermal conversion efficiency, rapid evaporation rate, and long-term stability. In this study, a vertically aligned porous aerogel evaporator is prepared using sodium alginate as the substrate material and graphene oxide (GO) and polypyrrole (PPy) as the photothermal materials through a directional freezing technology. The polypyrrole@graphene oxide-sodium alginate evaporator exhibits a high solar photothermal conversion efficiency as high as 98.6 % and an evaporation rate of up to 4.66 kg·m −2 ·h −1 under 1 sun. During the 144-hour desalination, the evaporator transports brine for evaporation in the daytime and removes salt residue from the evaporator surface at night. It has demonstrated a self-cleaning behavior and restored its desalination stability. Thus, this aerogel evaporator with a high evaporation rate and stable salt resistance shows great potential for practical applications in solar thermal conversion and seawater desalination.
研究领域:
材料科学
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环境科学
·
能源科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Yuhan Zhao,Rui Zhang,Yunqing Liu,Feng Wang,Shi Hu,Fenghui Yang,Chao Tao,Qiong Wu,Baoli Zha,Jiansheng Wu,Fengwei Huo
The commonly employed wet and semi-dry electroencephalogram (EEG) electrodes require the use of conductive media, resulting in issues such as reduced comfort, detached conductive coatings, and limitations in long-term wearing. In this study, we present a user-friendly dry EEG electrode made from conductive leather for long-term EEG monitoring. The conductive leather was obtained by in-situ synthesis of polypyrrole inside the goat leather, which could be further used as an EEG electrode. When positioned on the forehead, the interface impedance between the leather electrode and human skin complied with the international standard for EEG electrodes. The material's exceptional breathability enabled prolonged electrode wear. These leather electrodes facilitated precise monitoring of eye movement signals and α-wave activities in a relaxed state, laying the groundwork for extending their application to other brain regions. Furthermore, leather electrodes exhibited excellent performance even in the presence of sweat interference, thus confirming their advantages for long-term EEG monitoring. The leather dry electrode featuring superior wearability, portability, and long-term stability is expected to bring significant implications for future wearable technologies and monitoring devices.
研究领域:
生物医学工程
·
神经科学
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Zhihua Zhao,Yao Wang,Pu Chen,Lan Wu
In the wake of rapid advancements in the realm of smart textiles, flexible ammonia sensors have garnered significant interest because of its potential implications in environmental monitoring, health diagnosis, and human-machine interaction. Despite their promise, challenges such as limited flexibility, insufficient gas detection sensitivity, and complex production processes have hindered their pragmatic deployment. This study introduces a flexible and multi-functional sensors based on PU-Supported PPy/Ti 3 C 2 T x yarns fabricated through a straightforward in-situ polymerization technique. The gas sensitivity and stretch characteristics of NH 3 gas at ambient temperature were assessed, revealing that the flexible and multi-functional sensors has exceptional sensitivity, stretch range, stability, and durability, which can be employed for detecting human physiological activity and recognising gestures. Its remarkable selectivity and strong reaction to ammonia gas also demonstrate its multi-functionality. This study presents a successful approach for integrating high-performance multifunctional flexible electronic products, with wide-ranging application potential and promising possibilities in future smart textiles and wearable devices.
研究领域:
材料科学
·
传感器技术
·
智能纺织品
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产品关联
DOI
高影响因子
Results in Chemistry
·
2025
·
IF 4.2
Yizhou Yang,Longlong Wei,Shengdi Luo,Xudong Yang
To combat the global energy crisis and reduce environmental pollution, nano-semiconductor photocatalysts have become widely used. In this paper, a novel core-shell heterostructure containing polypyrrole@molybdenum disulfide (PPy@MoS 2 ) composites was synthesized using simple oxidative polymerization and hydrothermal methods. The photocatalyst is made of pyrrole as raw material, polyvinyl alcohol as protective agent, and Fe as catalyst. Polypyrrole nanoparticles are synthesized by oxidative polymerization. Then, sodium molybdate as molybdenum source, thiourea as sulfur source, hydroxylamine hydrochloride as reducing agent, and F127 as surfactant are added as template to synthesize PPy@MoS2 with a core-shell structure and an average size of 80 nm through hydrothermal method. The PPy@MoS 2 core-shell heterostructure performs much better than pure PPy or MoS 2 in full visible spectrum. Moreover, the PPy@MoS 2 structure exhibits high photoactivity in degrading methylene blue (MB), reaching a decomposition efficiency of 99.3 %. And after being recycled and reused 5 times, its catalytic effect is still not less than 99.3 %. Besides, the prepared PPy@MoS 2 nanocomposite possesses a high specific surface area and a remarkable heterostructure interface, which easily separates holes and electrons to improve the photodegradation ability. Thus, our proposed heterostructure nanomaterial has the potential to be utilized in a multitude of applications pertaining to the protection of the natural environment, including the treatment of water and the degradation of dyes that may contaminate water sources.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 30
·305401
·
IF 3.874
Shuzhen Xu,Huilian Hao,Yinan Chen,Wenyao Li,Wenzhong Shen,Paul R. Shearing,Dan J. L. Brett,Guanjie He
Polypyrrole (PPy) has high electrochemical activity and low cost, so it has great application prospects in wearable supercapacitors. Herein, we have successfully prepared polypyrrole/reduced graphene oxide (PPy/rGO) nanocomposite cotton fabric (NCF) by chemical polymerization, which exhibits splendid electrochemical performance compared with the individual. The addition of rGO can block the deformation of PPy caused by the expansion and contraction. The as-prepared PPy-0.5/rGO NCF electrode exhibits the brilliant specific capacitance (9300 mF cm−2 at 1 mA cm−2) and the capacitance retention with 94.47% after 10 000 cycles. At the same time, the superior capacitance stability under different bending conditions and reuse capability have been achieved. All-solid-state supercapacitor has high energy density of 167 μWh cm−2 with a power density of 1.20 mW cm−2. Therefore, the PPy-0.5/rGO NCF electrode has a broad application prospect in high-performance flexible supercapacitor fabric electrode.
研究领域:
材料科学
·
能源存储与转换
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 17
·7042-7050
·
IF 3.288
Jingjing Yuan,Lin Wang,Bo Xu,Ping Wang,Jiugang Yuan,Yuanyuan Yu,Chao Deng,Qiang Wang
Silk fibroins (SFs) have many attractive properties; however, the practical applications of pure fibroin materials are severely restricted by their low elasticity. To improve flexibility of regenerated SF membranes, carboxyl-terminated polyethylene glycol (cPEG) was introduced into fibroin chains using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS). Subsequently, laccase-mediated graft polymerization of polypyrrole (PPy) onto the SF-g-cPEG membrane was performed to achieve electrical conductivity. The results implied that cPEG was successfully grafted onto the SF chains; the elongation at break of the SF-g-cPEG membrane increased by three times compared to that of the untreated one. Meanwhile, the introduced cPEG promoted the binding of pyrrole radical cations onto fibroin membrane, resulting in an efficient deposition of a PPy conductive layer during the laccase treatment. Conductivity of the membrane of SF-g-cPEG/PPy meets the standard of conductive materials even after 48 cycles of bending testing. In addition, the composite membrane has acceptable in vitro biocompatibility. The present work provides a novel alternative for fabrication of flexible and conductive SF biomaterials, which would expand the applications of fibroin materials in wearable electronics.
研究领域:
生物材料学
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高分子化学
·
酶工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 6
·1-15
·
IF 2.8
Xiao Lijuan,Zhou Jingkai,Yu Zhixuan,Dong Huihao,Chen Yan
In the research of flexible smart electronics, obtaining particular structure electrodes to provide excellent electrochemical performance remains challenging. Here we report the synthesis and characterization of nanocomposite by a two-step method of polypyrrole (PPy) with Co 3 O 4 @SiO 2 in the presence of an oxidizing agent. Co 3 O 4 @SiO 2 was prepared by firing SiO 2 -coated zeolitic imidazolate framework-67 (ZIF-67/SiO 2 ) in a tubular furnace at a high temperature. Subsequently, PPy was coated and dispersed on Co 3 O 4 @SiO 2 by chemical methods at room temperature. In addition, we also explored the optimal ratio experiment of Co 3 O 4 @SiO 2 and PPy. The results show that the specific capacitance of Co 3 O 4 @SiO 2 and Co 3 O 4 @SiO 2 /PPy (2 mL) is 33.36 A/g and 107.7 A/g, at 0.6 A/g current density, indicating that the addition of PPy greatly improves the electrochemical performance of Co 3 O 4 @SiO 2 . This may be due to synergies between Co 3 O 4 @SiO 2 and PPy polymers, and the addition of PPy may help Co 3 O 4 @SiO 2 to construct more ion channels to enhance ion transport. This report will contribute to the development and application of cobalt oxide and silicon-shell electrode materials in the field of energy storage. It is helpful for the development and application of cobalt oxide and silicon-shell structures as electrode materials in the field of energy storage.
研究领域:
材料科学
·
能源存储
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产品关联
DOI
高影响因子
ChemElectroChem
·
2017
·Vol. 4
·期 5
·1135-1140
·
IF 4.136
Hongxiu Dai,Meng Lin,Nan Wang,Fei Xu,Donglei Wang,Houyi Ma
Graphical Construction zone : The Co 3 O 4 /PPy nanostructure possesses structural features of a nanowire core and nanosheet shell grown directly on a nickel foam substrate by electrochemical deposition processes. The PPy nanowires are introduced onto the nickel foam, which create a three-dimensional structure and the Co 3 O 4 nanosheets shell act as a catalyst for the electro-oxidation of glucose. Cobalt oxide nanosheets (Co 3 O 4 NSs)/polypyrrole nanowire (PPy NW) core-shell nano-heterostructures based on nickel foam (NF) were fabricated for electrochemical non-enzymatic glucose determination. The Co 3 O 4 /PPy nanostructures grew directly on nickel foam substrate by electrochemical deposition processes. The PPy NW core and the Co 3 O 4 NS shell constructed the hierarchical nanocomposites to form a three dimensional micro−nanostructure in the micropores of NF. The as-prepared Co 3 O 4 /PPy/NF heterostructures were characterized by using scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The introduction of the Co 3 O 4 NSs can provide a high surface area and lead to high sensitivity to glucose. Chronoamperometry was used to evaluate the sensitivity of the sensor toward glucose. Compared with NF, PPy/NF, and Co(OH) 2 /PPy/NF electrodes, the Co 3 O 4 /PPy/NF electrode exhibited higher electrocatalytic activity for the oxidation of glucose, and the proposed glucose sensor showed linear electrochemical responses to glucose with a low detection limit of 0.74 μM (S/N=3). In addition, the prepared biosensor revealed good selectivity in the presence of electro-active species such as d -fructose, uric acid, ascorbic acid and hydrogen peroxide, and provided an excellent platform for the determination of glucose in human urine samples.
研究领域:
材料科学
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分析化学
·
生物医学工程
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产品关联
DOI
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 10
·6507-6521
·
IF 5.7
Fan Lingling,Zheng Wenfeng,Yang Yuan,Sun Yan,Peng Songlin,Xu Jie,Yin Guangfu
Bacterial cellulose (BC)/polypyrrole (PPy) nanofibrous composites have been extensively studied in supercapacitors owing to their large specific surface area and excellent tensile strength. However, the inferior cycling stability due to structural pulverization of PPy impedes their potential applications. Herein, nanofibrous composite membranes of MXene, PPy and oxidized BC (TOBC) were prepared for flexible supercapacitor electrodes. The C6 primary hydroxyl groups of BC nanofibers were oxidized into aldehyde or carboxyl groups. Due to the enhanced interaction of TOBC with PPy and MXene, the TOBC nanofibers were horizontally wrapped on the MXene nanosheets and PPy was homogeneously deposited on the TOBC nanofibers. The flexible solid-state supercapacitors fabricated with the MXene@TOBC@PPy (TMP) electrodes achieved an areal specific capacitance of 928.9 mF cm −2 at 0.7 mA cm −2 and a capacitance retention of 85.5% after 5000 cycles. Therefore, the TMP electrodes could be a promising electrode material for flexible supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Smart and Nano Materials
·
2023
·
IF 3.9
Bingkun Tian,Xiaofeng Jiang,Weicun Chu,Chunxiao Zheng,Wanlin Guo,Zhuhua Zhang
Developing high-performance nanostructured materials is key to deliver the potential of hydrovoltaic technology into practical applications. As single-component materials have approached its limit in generating hydrovoltaic electricity, the development of multi-component hydrovoltaic materials has been necessary in continuously boosting the electricity output. Here, we report a hydrovoltaic material by integrating reduced graphene oxides and polypyrrole nanoparticles (rGO/PPy), where the rGO contributes improved conductivity and large specific surface area while PPy nanoparticles enable enhanced interaction with water. The device fabricated with this material generates a short-circuit current of 6 μA as well as a maximum power density of over 1 μW/cm3 from natural evaporation of water. And the substantial ion–PPy interaction enables robust voltage generation from evaporation of various salt solutions. Moreover, an outstanding scaling ability is demonstrated by connecting 10 devices in series that generate a sustainable voltage of up to ~2.5 V, sufficing to power many commercial devices, e.g. LED bulb and LCD screen
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Wenlan Ji,Yuanjie Xiong,Yuan Wang,Tian C. Zhang,Shaojun Yuan
Dealing with arsenic pollution has been of great concern owing to inherent toxicity of As(III) to environments and human health. Herein, a novel multilayered SnO 2 /PPy/ β -PbO 2 structure on TiO 2 nanotube arrays (TNAs/SnO 2 /PPy/ β -PbO 2 ) was synthesized by a multi-step electrodeposition process as an efficient electrocatalyst for As(III) oxidation in aqueous solution. Such TNAs/SnO 2 /PPy/ β -PbO 2 electrode exhibited a higher charge transfer, tolerable stability, and high oxygen evolution potential (OEP). The intriguing structure with a SnO 2 , PPy , and β -PbO 2 active layers provided a larger electrochemical active area for electrocatalytic As(III) oxidation. The as-synthesized TNAs/SnO 2 /PPy/ β -PbO 2 anode achieved drastically enhanced As(Ⅲ) conversion efficiency of 90.72% compared to that of TNAs/ β -PbO 2 at circa 45.4%. The active species involved in the electrocatalytic oxidation process included superoxide radical (•O 2 − ), sulfuric acid root radicals (•SO 4 − ), and hydroxyl radicals (•OH). This work offers a new strategy to construct a high-efficiency electrode to meet the requirements of favorable electrocatalytic oxidation properties, good stability, and high electrocatalytic activity for As(III) transformation to As(V).
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2026
·Vol. 38
·期 7
·e70191
·
IF 2.6
Shiyou Yu,Jieyu Song,Xinyu Zhao,Ruiyan Xiang,Chong Tan
In this study, a MoS 2 /polypyrrole (PPy) nanocomposite sensing film was constructed in situ on a glassy carbon electrode (GCE) surface via chemical oxidative polymerization. The synergistic coupling of high-surface-area layered MoS 2 and conductive PPy not only significantly increased the effective electrochemical active area of the electrode but also generated multiple affinity interactions toward chlorpyrifos (CPF) molecules through the edge-active sites of MoS 2 and the π -conjugated structure of PPy, endowing the composite film with prominent adsorption-enrichment capability and excellent selectivity for CPF. Upon enrichment of CPF, the specific interactions between the organophosphate groups and the MoS 2 /PPy interface modulated the electron transfer kinetics of the composite film, producing quantifiable electrochemical signals proportional to the pesticide concentration. Under optimized conditions, the proposed sensor achieved a low detection limit of 1.10 μg/L for CPF and exhibited outstanding anti-interference capability and favorable operational stability in complex agricultural product matrices. Real sample analysis demonstrated that the spiked recoveries ranged from 97.69% to 100.83%, with RSD values of 2.34%–3.53%, verifying the excellent accuracy and reliable analytical performance of the as-prepared material. This work provides a novel nanocomposite sensing material for organophosphorus pesticide residue detection and manifests great application potential in agricultural product quality and safety monitoring.
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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）