MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Renjie Wang,Yifan Zhu,Shanshan Liu,Kai Jiang,Runan Wang,Shuangshuang Ji,Mengyao Ma,Qianqian Chen,Huijuan Ran,Xudong Song
Uric acid (UA) levels serve as pivotal health biomarkers, underscoring the need for accurate detection methodologies. This paper presents a novel and straightforward electrochemical approach for UA detection, utilizing a sensing platform that integrates hybrid electrodes of Fe-MOF and polypyrrole (PPy). The findings reveal that the sensor shows exceptional sensitivity to UA across a wide concentration range of 1–300 µM, featuring an impressively low limit of detection (LOD) at 0.212 µM. Moreover, the sensor retains a peak current response of 87.2 % even after one month, underscoring its excellent stability and robust anti-interference properties. The improved sensing performance is due to the composite material’s retention of PPy’s superior electronic transport characteristics, combined with the enhanced specific surface area, active sites, and porosity contributed by the Fe-MOF component, leading to a substantial enhancement in electrochemical sensing capabilities. This research paves the way for the utilization of MOF nanomaterials in electrochemical sensing, thereby facilitating the practical application of nanocomposites.
研究领域:
生物医学工程
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分析化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Benlong Wei,Zhuannian Liu
Hybrid capacitive deionization (HCDI) is an innovative CDI technology that outperforms conventional CDI concerning desalination capability and charge efficiency. However, underutilized cathodes or anodes and mismatched kinetic behavior remain unsatisfactory given the imbalanced device architecture consisting of the capacitor and Faraday electrodes. Herein, we proposed a pseudo-capacitive behaviors induced dual-ion selective deionization (Di-CDI) strategy where molybdenum disulfide/polypyrrole (MoS 2 /PPy) acted as Na + intercalation cathode, and Ag-coated polyaniline-modified activated carbon (Ag@PANI/AC) served as Cl − trapping anode. In this system, the hollow PPy nanotube as the core is anchored by ultrathin MoS 2 nanoflakes, connecting loose MoS 2 nanoflowers to form a 3D flower-chain network, which holds convenient electron transfer routes and fast charge transport channels, facilitating accelerated ion diffusion process. Besides, Ag@PANI/AC was synthesized by modifying Ag particles on a 3D electron conduction substrate constructed by coupling PANI and AC, where Ag is responsible for the conversion reaction with Cl − to create AgCl. The conduction matrix compensates for the low conductivity of AgCl, enabling fast adsorption kinetics. As expected, the assembled Di-CDI system MoS 2 /PPy//Ag@PANI/AC delivers an excellent adsorption capacity of 25.1 mg g -1 , outstanding desalination rate (5.88 mg g -1 min -1 ), superior cycle stability (91.5% retention rate), and promoted charge efficiency of 56.2%, validating that this strategy supplies a viable way to achieve more energy-efficient CDI.
研究领域:
材料科学
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环境科学
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电化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
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IF 6.216
Fengfeng Gao,Xiao Du,Xiaogang Hao,Shasha Li,Xiaowei An,Mimi Liu,Nianchen Han,Tonghua Wang,Guoqing Guan
The continuous separation of dilute Cu 2+ from wastewater was performed by using a branched poly(ethylenimine) (BPEI)-functionalized carbon quantum dots (BPEI-CQD)/polypyrrole (PPy)/ polystyrenesulfonate (PSS) membrane in an electrochemically switched ion permselective (ESIP) process. The membrane with a high selectivity for Cu 2+ separation was prepared by pressure filtering BPEI-CQD/PPy/PSS solution through a polytetrafluoroethylene (PTFE) membrane. In this ESIP system, the directional uptake/release of Cu 2+ was realized by modulating the redox state of the membrane coupling with an external electric field. The effects of the operating parameters on the flux of Cu 2+ and membrane permselectivity were investigated. The BPEI-CQD/PPy/PSS composite electrode showed excellent permselectivity for Cu 2+ with a flux of 0.108 mg·cm −2 ·h −1 , a current efficiency of 39.9% and an excellent cycling stability. The Cu 2+ concentration in the solution was reduced from 30 to 0.82 ppm with a removal efficiency of 97.2%. Furthermore, the effects of BPEI-CQD content and the membrane thickness on the separation properties of the membrane from a mixed nitrate solution containing Cu 2+ , Ni 2+ and Cd 2+ were investigated. It is expected to understand the sorption-diffusion mechanism of such a membrane and provide more information on the design of it for a practical metal ion separation process.
研究领域:
环境科学
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材料科学
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电化学工程
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2020
·Vol. 126
·期 12
·1-7
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IF 1.81
He Song,Chang Mengyu,Liu Pengcheng,Wang Xueqin,Bai Zhongchen
We studied a Surface-enhanced Raman scattering (SERs) film by self-assembled deposition of Ag nanoparticles on the surface of PPy@PEDOT:PSS films to detect melamine molecules. The PPy@PEDOT:PSS film was prepared using an electrochemical polymerization method in a mixture solution of PPy and PEDOT:PSS. Then, Ag nanoparticles were directly deposited on the surface of PPy@PEDOT:PSS films by a chemical self-assembly method as an active SERs substrate to detect melamine molecules. The results showed that the density of Ag nanoparticles on the surface of PPy@PEDOT:PSS film was gradually increased due to the increase of depositional time of Ag nanoparticles. Accordingly, The SERs effect was also substantially enhanced. The signal of melamine was increased up to 440 times. The melamine molecules at 6.4 ng/ml concentration could be clearly identified. This preparing method of SERs film and detecting method of melamine molecules provide a new strategy for the design and application of chemical sensors and bio-sensors.
研究领域:
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
DESALINATION
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2022
·
IF 11.211
Hao Yu,Yi He,Hongjie Li,Zhong Li,Baiyu Ren,Guanyu Chen,Xinyi Hu,Tao Tang,Yinfen Cheng,Jian Zhen Ou
Graphene oxide membranes (GOMs) have great potentials in the high-performance desalination of salty wastewater. However, the low-selectivity and fouling issues are the main obstacles to practical implementation. Although compositing with TiO 2 nanoparticles alleviates such problems by regulating membrane structures and photodegrading surface organic filter cakes, the performance is still limited by the intrinsic aggregation feature and narrow UV response range. Here, we functionalize TiO 2 nanoparticles with polypyrrole (PPy) to improve their dispersibility and visible-light-driven photodegradation properties. The as-formed core-shell heterostructures (PPy@TiO 2 ) with a large dose are intercalated into GOM, resulting in a large water flux (436.93 Lm −2 h −1 bar −1 ) and selective positive dye/negative dye separation with a maximum salt permeation of 97%. Upon the reduction of the dosage, more than 99% of dyes are separated regardless of molecule weights and surface charge polarity although the average water flux is reduced to 5.83 Lm −2 h −1 bar −1 and the salt rejection rate is increased up to 24%. In addition, the composite membrane with low-dosed PPy@TiO 2 photodegrades MB completely within 2 h, while its water permeability and dye rejection performance are maintained after a 5 h filtration process . Our work provides a facile method to develop multi-functional 2D composite membranes with controllable and stable dye desalination performances.
研究领域:
环境科学
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材料科学
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纳米技术
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水处理
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产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
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2021
·
IF 9.078
Qiongzhen Liu,Cong Yi,Jiahui Chen,Ming Xia,Ying Lu,Yuedan Wang,Xue Liu,Mufang Li,Ke Liu,Dong Wang
Lightweight and flexible multifunctional conductive fabrics with excellent environmental stability are highly demanded for electromagnetic interference (EMI) shielding and e-textiles related applications. The relationship between the fabric structure and the EM properties of conductive fabrics has aroused extensive research interest, but it is still full of challenges. Herein, warp knitted polyethylene terephthalate (WK-PET) fabric and non-woven PET (NW-PET) fabric with irregular pore structure and similar thickness are selected as substrates. Flexible Ni/PPy/PET fabrics with high EMI shielding effectiveness have been facilely fabricated by in-situ polymerization of pyrrole (Py) and subsequent electroless plating of nickel. The conductivity, EMI shielding effectiveness and the normalized effectiveness of the Ni/PPy/NW-PET fabric is 96.32 S/cm, 77.87 dB, 1600.19 dB cm 2 /g, respectively, which are better than those of the Ni/PPy/WK-PET (91.71 S/cm, 62.6 dB, 1037.11 dB cm 2 /g). A simplified fabric structure model and fractal dimension of the fabrics have been proposed in this study to reveal the relationship between the fabric structure and the EMI shielding effectiveness. It implies that the fractal dimension of a conductive fabric is highly related to its absorption EMI shielding effectiveness. It also suggests a fabric with a higher fractal dimension as a base material can provide more connected conductive networks and better EMI shielding effects for the resulting conductive fabric. Moreover, the Ni/PPy/NW-PET fabric demonstrates outstanding heat-humid stability, high bending stability and washability, as well as great potential in wearable fabric antennas. In short, this work may provide a novel idea for the development of high-performance conductive fabrics.
研究领域:
材料科学
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电子纺织品
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Zelin Chen,Keyu Guo,Fengguo Yan,Daohu Sheng,Siyao Cheng,Weiqiang Wang,Ruru Gao,Weijin Li,Aming Xie
Interfacial polarization has been proved to significantly contribute to the effective absorption of electromagnetic waves (EMW). However, a model that clearly defines the contribution of interfacial polarization has yet to be developed. In this work, a layer of WO 3 was introduced within the WS 2 /PPy nanocomposites by oxidation to create a heterojunction interface, resulting in the formation of a WS 2 /WO 3 /PPy nanocomposite material. The experiments demonstrated that interfacial engineering could significantly enhance the electromagnetic wave absorption capability of the material. The WS 2 /WO 3 /PPy composite achieved a minimum reflection loss (RL min ) of −58.87 dB at a thickness of 3.3 mm and an effective absorption bandwidth (EAB) of 6.72 GHz at a thickness of 2.3 mm. This work clarifies the impact of interfacial polarization on EMW absorption, providing a feasible approach for designing novel, high-efficiency EMW absorbing materials.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2017
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IF 4.95
Tingting Xu,Bo Chi,Jian Gao,Meilin Chu,Wenlu Fan,Meihui Yi,Hong Xu,Chun Mao
A simple and accurate immune sensor for quantitative detection of α-Fetoprotein (AFP) was developed based on the immobilization of antigen on the surface of Hep-PGA-PPy nanoparticles modified glassy carbon electrodes (GCE). The obtained Hep-PGA-PPy nanoparticles were characterized by fourier transform infrared (FT-IR) spectra and transmission electron microscopy (TEM). And the blood compatibility of Hep-PGA-PPy nanoparticles was investigated by in vitro coagulation tests, hemolysis assay and whole blood adhesion tests . Combining the conductive property of polypyrrole (PPy) and the biocompatibility of heparin (Hep), the Hep-PGA-PPy nanoparticles could improve not only the anti-biofouling effect the electrode, but also improved the electrochemical properties of the immune sensor. Under optimal conditions, the proposed immune sensor could detect AFP in a linear range from 0.1 to 100 ng mL −1 with a detection limit of 0.099 ng mL −1 at the signal-to-noise ratio of 3, and it also possessed good reproducibility and storage stability. Furthermore, the detection of AFP in five human blood samples also showed satisfactory accuracy with low relative errors. Thus, the developed immune sensor which showed acceptable reproducibility, selectivity , stability and accuracy could be potentially used for the detection of whole blood samples directly.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yi Wang,Jie Wang,Dong Wei,Lan Xu
In this study, a multicore-shell ternary composite electrode material (MnO 2 @Ppy@NPCNFs) with excellent electrochemical performances was prepared by using surface modification, in which core–shell Ppy@N-doped porous carbon nanofibers (Ppy@NPCNFs) with large specific surface area and high conductivity were used as the substrate (a multicore layer), and MnO 2 was loaded on the substrate by hydrothermal synthesis to form a shell layer, further improving the SC of electrode material. The parameters of hydrothermal growth of MnO 2 on Ppy@NPCNFs were explored by means of the control variable method and response surface methodology, and the optimal parameters were predicted and verified. Electrochemical test results showed that the SC of MnO 2 @Ppy@NPCNFs prepared under the optimal reaction parameters was as high as 595.77 F g −1 , and its capacitance retention was 96.2 % after 1000 cycles. Moreover, a symmetric supercapacitor prepared with the optimal multicore-shell electrode showed an energy density of 9.36 Wh kg −1 at a power density of 1000 W kg −1 and a retention rate of 92.46 % after 1000 cycles, indicating the promising application of multicore-shell ternary composite electrode material in high-performance supercapacitors.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaoning Ren,Ming Yang,Taotao Yang,Chao Xu,Yongqin Ye,Xiongni Wu,Xing Zheng,Bin Wang,Ying Wan,Zhiqiang Luo
Conductive polymer hydrogels (CPHs) hold significant promise in broad applications, such as bioelectronics and energy devices. Hitherto, the development of a facile and scalable synthesis method for CPHs with high electrical conductivity and biocompatibility has still been a challenge. Herein, we demonstrate highly conductive PPy–PEDOT:PSS hybrid hydrogels which are prepared by a simple solution-mixing method. This fabrication method involves the mixing of a pyrrole monomer with a PEDOT:PSS dispersion, followed by in situ chemical oxidative polymerization to form polypyrrole (PPy). The electrostatic interaction between negatively charged PSS and positively charged conjugated PPy facilitates the formation of PPy–PEDOT:PSS hybrid hydrogels. The conductivity of the PPy–PEDOT:PSS hybrid hydrogels is 867 S m–1. The PPy–PEDOT:PSS hybrid hydrogels show excellent biocompatibility. Moreover, the PPy–PEDOT:PSS hybrid hydrogels have a hierarchical porous structure which facilitates the 3D cell culture within the hydrogels. The PPy–PEDOT:PSS hybrid hydrogels exhibit excellent in situ biomolecular detection and real-time cell proliferation monitoring performance, indicating their potential as highly sensitive electrochemical biosensors for bioelectronics applications. Our strategy for the fabrication of CPHs with the electrostatic interaction between the negatively charged conductive polymer and positively charged conductive polymer would provide new opportunities for the design of highly conductive conjugated hydrogels for bioelectronics applications and energy devices.
研究领域:
生物电子学
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材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Mingming Chen,Qinghua Gu,Huiping Shao,Haihong Liu,Jingde Luan,Zheng Yan,Wengang Liu,Xin Ke
In this study, the PPY/CMC aerogels showed rapid removal of norfloxacin (NOR) within 2 h with a maximum adsorption capacity of 845.7 mg/g and excellent adsorption performance in the pH range of 3–10. The exhaustive Density Functional Theory (DFT) calculations revealed that π-π electron-donor–acceptor (EDA) interactions dominated at different pH. Humic acid (HA) mainly competed with NOR for the sites of π-π EDA interactions on the adsorbent, but only slightly inhibited NOR adsorption at high concentrations due to the weak competitiveness and compensation by NOR-bridging interactions. Background ions mainly competed with NOR for electrostatically interacting sites, but ions in the lower valence state were less competitive and preferentially occupied different adsorption sites, thus hardly affecting the adsorption of NOR. The higher valence state with higher concentration of ions had increased competing ability, and although the bridging interaction can compensate some adsorption sites, it still inhibited the adsorption of NOR. The PPY/CMC aerogels had fine affinity for multiple antibiotics, and the differences in adsorption capacity were determined by the charge and structural properties of the antibiotics themselves. Moreover, excellent recyclability of PPY/CMC aerogels was confirmed after five adsorption–desorption cycles as the diminished performance from 96.8% to 83.7%. These results will help us to understand the structure-performance relationship between contaminants and PPY/CMC aerogels, and prefigure the potential of PPY/CMC aerogels as a novel adsorbent for the removal of multiple antibiotics.
研究领域:
环境科学
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材料科学
·
分子生物学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Peng Tang,Jiawei Du,Mang Li,Xueying Zhao,Huiqi Ren,Xuyang Zhang,Guohua Wu,Xiangwei Wang
Core–shell structures are commonly employed in microwave absorption (MA) materials due to their distinctive interfacial architecture. In this study, ferroferric oxide@polypyrrole (Fe3O4@PPy) nanocomposites with hollow core–shell structures were successfully synthesized for MA using a solvothermal process, followed by in situ polymerization. The minimum reflection loss (RLmin) frequency of the nanocomposites can be precisely controlled by adjusting the thickness of the PPy shell. The thickening of the PPy shell enhances the conduction loss of the nanocomposites, thus, enhancing the dielectric loss of the nanocomposites. The fabricated FP-170, FP-180 and FP-190 nanocomposites exhibit remarkable MA properties at low frequencies, with their RLmin reaching −63.82 dB, −84.92 dB, and −71.25 dB at 4.55 mm, 3.87 mm, and 2.64 mm, respectively. The maximum effective absorption bandwidth (EABmax) of FP-170 extends to 3.48 GHz at 2.39 mm, FP-180 extends to 4.20 GHz at 2.38 mm, and FP-190 extends to 4.96 GHz at 2.16 mm. The FP-200 nanocomposite, which has PPy shell thickness of 15 nm, exhibits exceptional radar stealth performance, with Radar Cross-Section (RCS) values below −17.68 dB·m2 within the range of −90° to 90°. Both simulation and experimental results prove that the hollow core–shell structured Fe3O4@PPy nanocomposite is an excellent candidate for MA applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）