Journal of Water Process Engineering
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2022
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IF 7.34
Xing Lai,Chun Wang,Liming Wang,Changfa Xiao
In this study, a stable and controllable poly( p -phenylene terephthamide)/polypyrrole (PPTA/PPy) composite organic solvent nanofiltration (OSN) hollow fiber membrane was successfully prepared based on the robust chemical vapor deposition (CVD) method. The structure and properties of the prepared PPTA/PPy OSN membranes were studied in detail. Interestingly, after modifying by PPy, SEM showed that the surface of the membrane formed a layer of “Turing-like” structure and evenly covered the surface of the membrane. It was evident that the prepared PPTA/PPy OSN membranes achieved good dye-removal ability with a molecular weight cut-off range from 200 to1000 Da, and the rejection of negative dyes was higher than 93.4%. Especially at high temperature (80 °C) and organic solvent ( N , N -dimethylacetamide, DMAc), the PPTA/PPy OSN membranes still exhibited excellent permeation and separation performance. Furthermore, at room temperature, the immersion experiment of the fabricated PPTA/PPy OSN membranes in both ethanol and DMAc for one month also proved the stability of long-term organic solvents. Based on the above results, this work offered a novel PPTA based hollow fiber nanofiltration membrane, which was expected to be applied in thermal and organic dye wastewater treatment .
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JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Yusheng Li,Yun Feng,Li Li,Keyan Wu,Xiangjie Bo,Jianbo Jia,Liande Zhu
Due to the obstacle of sluggish kinetics on cathode of fuel cells and metal–air batteries, developing low-cost and durable electrocatalysts to replace the platinum-based catalysts still remains a grand challenge. Here, we describe a simple self-template approach to synthesize N-doped mesoporous carbon nanocages (FeCo@NC) embedded with FeCo alloy nanoparticles as oxygen reduction reaction (ORR) electrocatalyst. The resulting heterostructure is derived from corresponding PBA@PPy composites, which are pre-prepared by polymerization of polypyrrole (PPy) layer on Prussian blue analogue (PBA) nanocubes. The FeCo alloy nanoparticles with an average particle size of ∼10 nm are well dispersed and confined within the shell of carbon nanocages. Benefiting from the mesoporous structure and the synergetic interaction of binary metals, the optimized FeCo@NC-3-800 electrocatalyst exhibits comparable ORR performances (0.83 V for half-wave potential (E 1/2 ), 5.323 mA cm −2 for limiting current density (J k )), superior durability and excellent methanol tolerance to the commercial Pt/C (20 wt%). This work provides an appropriate strategy for general, efficient and practical synthesis of more promising non-precious metal electrocatalyst with high ORR activity.
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Journal of Nanomaterials
·
2017
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IF 1.871
Shuo Yang,Huiya Qin,Xuan Li,Huijun Li,Pei Yao
Nanopolypyrrole/organic montmorillonite- (nano-ppy/OMMT-) coated separator is prepared by coating nano-ppy/OMMT on the surface of polyethylene (PE). Nano-ppy/OMMT-coated separator with three-dimensional and multilayered network structure is beneficial to absorb more organic electrolyte, enhancing the ionic conductivity (reach 4.31 ). Meanwhile, the composite separator exhibits excellent thermal stability and mechanical properties. The strong covalent bonds (Si-F) are formed by the nucleophilic substitution reaction between F− from the thermal decomposition and hydrolysis of LiPF6 and the covalent bonds (Si-O) of nano-ppy/OMMT. The Si-F can effectively prevent the formation of HF, POF3, and LiF, resulting in the inhibition of the disproportionation of Mn3+ in LiNi1/3Co1/3Mn1/3O2 material as well as reducing the internal resistance of the cell. Therefore, the nano-ppy/OMMT-coated separator exhibits outstanding capacity retention and cycling performance at 80°C.
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PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2016
·Vol. 34
·期 3
·1600233
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IF 4.367
Yanzhou Jiang,Yan Gu,Guangdi Nie,Maoqiang Chi,Zezhou Yang,Ce Wang,Yen Wei,Xiaofeng Lu
In this paper, a novel strategy for the fabrication of reduced graphene oxide (rGO)/Cu 8 S 5 /polypyrrole (PPy) composite nanosheets with Cu 8 S 5 nanoparticles and PPy layer anchored on the surface of rGO as peroxidase-like nanocatalyst is reported. During the synthesis, graphene oxide (GO)/CuO composite nanosheets are prepared first and used as templates, then the sulfuration of CuO and polymerization of pyrrole are accompanied with the reduction of GO, resulting in ternary rGO/Cu 8 S 5 /PPy composite nanosheets. The synthesized Cu 8 S 5 nanoparticles with a diameter in the range from tens to hundreds of nanometers are dispersed within PPy decorated rGO nanosheets. The resultant ternary rGO/Cu 8 S 5 /PPy composite nanosheets exhibit a higher peroxidase-like catalytic activity toward the oxidation of 3,3′,5,5′-tetramethylbenzidine in the presence of H 2 O 2 than GO/CuO and rGO/CuS composite nanosheets, revealing a synergistic effect on their activity. The as-prepared rGO/Cu 8 S 5 /PPy platform provides a simple colorimetric approach for the detection of H 2 O 2 and phenol with a high sensitivity. This work offers a new way for the fabrication of rGO-based nanocomposite with superior enzyme-like activity, which displays great potential applications in biocatalysis and environmental monitoring.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
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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
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.
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Nano Today
·
2024
·
IF 13.2
Cong Wang,Chaofeng Wang,Shuilin Wu,Zhenduo Cui,Yufeng Zheng,Zhaoyang Li,Hui Jiang,Yu Zhang,Paul K. Chu,Shengli Zhu,Xiangmei Liu
Deep-seated osteomyelitis caused by bacterial infection, particularly methicillin-resistant Staphylococcus aureus (MRSA) infection, poses a significant challenge to treatment. In this study, we propose the utilization of a composite microwave (MW)-responsive polypyrrole-modified titanium carbide/zinc oxide (Ti 3 C 2 T x /ZnO–PPy) heterostructure as a potential therapeutic option for MRSA-infected osteomyelitis. In vitro and in vivo experiments show that Ti 3 C 2 T x /ZnO–PPy can effectively treat MRSA-induced osteomyelitis under MW irradiation, which is attributed to the enhanced in situ release of MW heat and reactive oxygen species (ROS). Density functional theory and MW network vector analysis further reveal that under MW irradiation, Ti 3 C 2 T x /ZnO–PPy generates free electrons that move freely within the heterogeneous interface formed by Ti 3 C 2 T x and ZnO, thereby enhancing the accumulation of charges. These charges combine with adsorbed oxygen at the interface to produce ROS. Furthermore, augmented dipole polarization induced by the functional groups on the surface of Ti 3 C 2 T x and the interfacial polarization between Ti 3 C 2 T x and ZnO contribute to good impedance matching and a favourable attenuation constant in the Ti 3 C 2 T x /ZnO–PPy composite, resulting in superior MW thermal properties. Moreover, the polypyrrole-modified composite shows excellent biocompatibility. This efficient antimicrobial system with MW irradiation is expected to offer a viable approach to the management of osteomyelitis.
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ACS Biomaterials Science & Engineering
·
2020
·
IF 4.152
Ying-Ying Wang,Hai-Feng Zhang,Dong-Hui Wang,Ning Sheng,Gong-Guo Zhang,Ling Yin,Jing-Quan Sha
Developing a new cost-effective and reliable approach used for the detection of uric acid (UA) with no requirement of uricase is still very challenging. Herein, an easily realized, cost-effective, and uricase-free approach is reported for selective colorimetric biosensing of UA utilizing polypyrrole (PPy)-coated polyoxometalate-encapsulated fourfold helical metal–organic frameworks Ag5[bimt]2[PMo12O40]·2H2O (Ag5PMo12) as a monolithic peroxidase mimic. It is demonstrated that the as-obtained Ag5PMo12@PPy possesses excellent peroxidase-like activity originated from the synergistic effect to induce catalytic oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to green oxTMB in the presence of H2O2. Then, the green oxTMB can be selectively converted to colorless TMB induced by UA; thus, UA can inhibit the catalytic oxidation of TMB. Based on these results, a uricase-free colorimetric biosensor for UA is achieved with a linear detection range of 1–50 μM and a detection limit of 0.47 μM. More importantly, the developed biosensor is suited for simple-operated and good reliable UA detection in clinical samples, showing promising application ability in clinical diagnosis and relative fields.
研究领域:
生物化学
·
医学诊断
·
材料科学
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhen-yu Yang,Xin-zheng Jin,Chen-hui Huang,Yan-zhou Lei,Yong Wang
The enthusiasm for environmental energy harvesting has triggered a boom in research on photo-thermoelectric generators (PTEGs), and the relevant applications are mainly focused on self-energy supply sensors owing to the limitations of their output performances. For this purpose, high-output hierarchical heterogeneous PTEGs were constructed by assembling separately optimized thermoelectric (TE) and photothermal (PT) layers. The pressure and temperature conditions of Ag2Se films during the pressing process were first explored, and the sample with the optimal performance and least defects was selected as the TE layer. At the same time, different morphologies of polypyrrole (PPy) PT layers were electrochemically synthesized. It is found that the three-dimensional structure of Bushy-PPy could effectively improve the light absorption and thus enhance the PT conversion performance. The final assembled PTEG can produce an output voltage of −9.03 mV and an output power of 3.53 μW under the irradiation of a near-infrared light source of 300 mW cm–2 without a cooling source, and it can also achieve considerable output power under visible light irradiation of different intensities. Combining its high retentions of electrical conductivity (99%) and output performance (97%) after 1000 bending-tension cycles, it is proven to be a promising next-generation wearable flexible energy harvesting device.
研究领域:
材料科学
·
能源工程
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Mingliang Ma,Yuxin Bi,Zhengguo Jiao,Jiewei Yue,Zijian Liao,Yan Wang,Yong Ma,Weibo Huang
At present, the magnetic metal/carbon composites have been widely explored for microwave absorption (MA), which effectively integrate the characteristics of magnetic and dielectric materials . As a typical material, metal–organic framework (MOF) shows tremendous potential as a precursor or template. However, its development is limited by the inferior impedance matching. Herein, a novel rod-like Fe/Fe 3 O 4 /FeN/N-doped carbon (FON/NC) composite was synthesized via dual-ligand strategy and following calcination . The outer polypyrrole (PPy) shell, obtained by a facile polymerization method, effectively optimized the impedance matching and observably enhanced the MA capacity. Both the multi-component loss mechanism and unique porous core–shell structures of MOF-derived composites were beneficial for microwave attenuation . The effects of filler loadings (20 wt%, 25 wt%, 30 wt% and 35 wt%) on electromagnetic (EM) properties of FON/NC@PPy composites were discussed. Remarkably, as-obtained composites exhibited a minimum reflection loss (RL) value of −60.08 dB at the layer thickness of merely 1.44 mm and the widest effective absorption bandwidth (EAB, RL ≤ −10 dB) of 5.06 GHz at 1.64 mm with 30 wt% filler loading. This work provides a great reference for designing MOF-derived absorbers with high MA performance.
研究领域:
材料科学
·
电磁学
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高影响因子
BIOMATERIALS
·
2026
·
IF 13.6
Canyi Chen,Qinqing Tang,Qinyao Xu,Dehui Feng,Qiang Luo,Bin Xu,Hanyuan Zhang,Tingting Zhao,Weijun Fang
Targeted autophagy regulation holds great promise for antitumor therapy, whereas conventional single-modal autophagy interventions easily induce compensatory escape of tumor cells and fail to transform protective autophagy into a lethal phenotype. In this study, a near-infrared (NIR)-responsive polypyrrole/zeolitic imidazolate framework-8 (PPy/ZIF-8) nanoparticle was successfully fabricated. This nanoplatform enables synergistic and precise regulation of autophagic flux, which amplifies upstream autophagy activation and blocks downstream autophagic pathways simultaneously. The incorporation of PPy endows the nanoparticle with excellent near-infrared absorption capability and photothermal effects. It boosts interfacial electron transfer and optimizes electron-hole separation, further enabling the nanoparticles to possess ROS generation ability. Under 808 nm laser irradiation, the generated ROS and zinc ions induce mitochondrial damage to amplify upstream autophagic signals, whereas the photothermal effect impairs lysosomal function and blocks the downstream degradation of autophagosomes. This dual regulatory strategy causes pathological accumulation of autophagosomes and ultimately triggers autophagic cell death in tumor cells. This work validates the feasibility of integrated autophagy regulation and provides a facile and versatile strategy for the design of advanced multimodal antitumor nanotherapeutics.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Minghua Wang,Dan Guo,Bochong Wang,Jianyong Xiang,Kun Zhai,Tianyu Xue,Fusheng Wen,Yingchun Cheng,Congpu Mu
In this work, MIL-96 (Ga) was successfully synthesized by a microwave-assisted method and pyrolyzed at 700 o C to obtain Ga 2 O 3 /C (G-700) composites. After carbonization, Ga 2 O 3 nanoparticles were uniformly embedded in a porous carbon skeleton. The surface of MIL-96(Ga)-derived Ga 2 O 3 /C was used as a template for directional pyrrole polymerization. G-700@PPy composite materials were obtained by in-situ polymerization of pyrrole on the surface of G-700. A hierarchical interfacial structure was created with regulated dielectric properties. The effect of pyrrole doping content on the electromagnetic waves (EMWs) absorption properties of G-700@PPy composite materials was studied. The experimental result showed that the minimum reflection loss ( RL min ) value of G-700@PPy-3 composite materials reached -79.0 dB under a thin thickness of 1.58 mm, and the maximum effective absorption bandwidth (EAB) of 5.66 GHz was obtained under 1.78 mm. The results indicate that highly conductive PPy could significantly improve the impedance matching conditions and electromagnetic attenuation capacity of G-700 composite materials, which provided an important idea for optimizing the microwave absorption properties of low permittivity composites.
研究领域:
材料科学
·
电磁学
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