NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 47
·22639-22649
·
IF 3.925
Doudou Wang,Haiyan Zhang,Ye Zhang,Zhixuan Huang,Lili Li
The design of organic photocatalysts with visible-light-response is an important way to solve energy crisis and environmental pollution. Polypyrrole (PPy) as one of the conjugated polymers is a prospective photocatalyst material due to its excellent optical properties, easy synthesis and high environmental stability. In this work, polyacrylonitrile (PAN) and g-C3N4 were electrospun as a fiber membrane matrix. PPy was coated on the matrix by in situ polymerization of a pyrrole monomer using doped Fe3+ as an oxidant. PPy exhibited a broadband visible light absorption region and a narrow band gap which was conducive to improve visible light utilization. The separation efficiency of photogenerated e−–h+ pairs was improved by constructing a heterojunction between PPy and g-C3N4. The doping of Fe3+ as an electron scavenger further prevented the recombination of carriers. The PAN/g-C3N4-PPy-Fe3+ membrane showed highly efficient removal performance for both cationic and anionic dyes. Moreover, PAN/g-C3N4-PPy-Fe3+ exhibited excellent recyclability and stability. This work outlined an approach for designing a novel conjugated polymer based multi-component composite photocatalyst with visible light response.
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MACROMOLECULAR BIOSCIENCE
·
2022
·Vol. 23
·期 2
·2200349
·
IF 5.859
Zhicong Lin,Donghao Fan,Guojiao Li,Liming He,Xianyan Qin,Bin Zhao,Qin Wang,Wenlang Liang
Diabetic mellitus is one of the leading causes of chronic wounds and remains a challenging issue to be resolved. Herein, a hydrogel with conformal tissue adhesivity, skin-like conductivity, robust mechanical characteristics, as well as active antibacterial function is developed. In this hydrogel, silver nanoparticles decorated polypyrrole nanotubes (AgPPy) and cobalt ions (Co 2+ ) are introduced into an in situ polymerized poly(acrylic acid) (PAA) and branched poly(ethylenimine) (PEI) network (PPCA hydrogel). The PPCA hydrogel provides active antibacterial function through synergic effects from protonated PEI and AgPPy nanotubes, with a tissue-like mechanical property (≈16.8 ± 4.5 kPa) and skin-like electrical conductivity (≈0.048 S m −1 ). The tensile and shear adhesive strength (≈15.88 and ≈12.76 kPa, respectively) of the PPCA hydrogel is about two- to threefold better than that of fibrin glue. In vitro studies show the PPCA hydrogel is highly effective against both gram-positive and gram-negative bacteria. In vivo results demonstrate that the PPCA hydrogel promotes diabetic wounds with accelerated healing, with notable inflammatory reduction and prominent angiogenesis regeneration. These results suggest the PPCA hydrogel provide a promising approach to promote diabetic wound healing.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Ruimeng Wang,Xinqi Luan,Jingyu Bao,Yaseen Muhammad,Syed Jalil Shah,Guanchen Wang,Jing Li,Guoyou Lin,Hongbing Ji,Zhenxia Zhao
High capacity adsorption of volatile organic compounds (VOCs) in high humidity environment is a crux but challenge for atmospheric VOCs governance. In this work, tubular carbonized N-doped polymers (TCNP) were implanted into MIL-101 via N-Cr-O interface self-assembly, enabling high adsorption for vapor toluene in high humidity. Through mechanical ball milling and carbonization, Cr ions were preloaded on TCNP to form highly dispersed 3–5 nm Cr-N crystallite as anchors for growing MIL-101(Cr/Cu). Newly constructed smaller micropores of 6.8 Å with aromatic rings/N sites at the interface and doped Cu ions in MOF framework synergistically enhanced π-π conjugation and electrostatic interaction for C 7 H 8 molecules. This endowed [TCNP 5 /MIL(Cr/Cu)] N-Cr 2.9 times higher toluene uptake (6.34 mmol/g) at low vapor pressure ( P / P 0 = 0.02) and 1.9 times diffusivity under high humidity (60% RH) than that of MIL-101(Cr) at 298 K. The adsorption breakthrough curves for vaporous toluene showed that TCNP@MIL-101(Cr/Cu) exhibited outstandingly higher adsorption equilibrium capacity (2.7 mmol/g) under 80% RH, corresponding to approximately 2–10 times than those of reported state-of-the-art adsorbents under similar conditions. This study provided a novel interface construction strategy for hydrophobic MOF composites, which supplied deeper understanding for VOCs adsorption and promoted MOFs practical application in VOCs capture under humid environment.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 31
·期 2
·637-647
·
IF 4.705
Li Dan,Liu Huipeng,Wang Ziwen,Zhang Zeqian,Wang Chengzhong,Zhao Biao,Pan Kai
Constructing 3-D nanomaterial-based adsorbents with good mechanical properties has attracted increasing attention. This paper reports a simple strategy to prepare ultralight and superelastic 3-D aerogels as efficient adsorbents for heavy metal Cr(VI) in wastewater by in-situ loading of polypyrrole on cellulose acetate nanofibers followed by freeze-drying method. The obtained aerogel possesses obvious 3-D porous and cross-linked structure, in which polypyrrole is uniformly coated on the nanofiber surface. Besides, the aerogel shows good mechanical properties with high compressive strength of 14.49 kPa, and can be processed into any desired shape. Especially, due to the presence of large specific surface area and high porosity, the obtained nanofiber aerogel shows significant Cr(VI) adsorption with maximum adsorption capacity of 244.65 mg/g. The present work proposes a high-quality nanofiber aerogel for efficiently adsorbing Cr(VI).
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Chunlin Liu,Boxiang Zeng,Le Jiang,Yixian Wu,Yifan Wang,Jingyu Wang,Qiong Wu,Xiaodan Sun
Flexible supercapacitors based on hydrogel electrolytes are promising power sources for wearable devices but suffer from high interfacial resistance and other drawbacks. To address this problem, we herein prepared a tough poly(vinyl alcohol)-gelatine double-network hydrogel electrolyte and endowed it with self-healability and low interfacial resistance through the introduction of reversible boronic ester bonds, glycerol, and ammonium sulphate. The in situ deposition of a conductive polypyrrole layer on the hydrogel surface afforded an all-in-one supercapacitor with decreased electrode–electrolyte interfacial resistance. The performance of this supercapacitor (areal capacitance = 1325.5 mF cm −2 at a current density of 1 mA cm −2 , maximum energy density = 168.5 μW h cm −2 , maximum power density = 670 μW cm −2 ) was superior to that of most of integrated supercapacitors reported to date and was hardly affected by low temperatures, long-term storage, bending, or self-healing after damage. Moreover, a biocompatible strain sensor based on the above hydrogel was used to detect the motion of human (face, elbow, knee) and mouse (thigh) models and thus monitor their behaviour and activity levels. Thus, the multifunctional integration of our dual-network hydrogel was concluded to hold considerable promise for the fabrication of wearable devices.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2023
·Vol. 37
·期 6
·1080-1086
·
IF 1.6
Zhu Rufeng,Wang Yao,Tao Yang,Chen Yuanli,Wang Yuedan
Glutaraldehyde (GA) crosslinked chitosan (CHIT) was modified on nylon fibers. Afterwards, pyrrole was in-situ polymerized on the surface of the CHIT/Nylon fiber. The SEM and FT-IR results show that the functional fiber is successfully prepared, and the obtained polypyrrole (PPy) presents nanorods morphology on the fiber surface. The mechanical properties of the fibers were studied by Instron. The organic electrochemical transistors based on PPy/Nylon fiber, PPy/CHIT/Nylon fiber, and PPy/GA-CHIT/Nylon fiber as channels were prepared and their transistors performance was compared. It is found that PPy/GA-CHIT/Nylon fiber-based transistor has great output, transfer, transient curves, and excellent transconductance of 6.8 mS, providing a new platform for the field of wearable devices. Furthermore, the study introduces chitosan material with excellent biocompatibility, which makes prepared transistors also have potential applications in the field of biosensing.
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Advanced Materials Interfaces
·
2023
·Vol. 10
·期 9
·2202488
·
IF 5.4
Shihao Fu,Renjing Song,YueFei Wang,Yurui Han,Chong Gao,Jiangang Ma,Haiyang Xu,Bingsheng Li,Aidong Shen,Yichun Liu
Deep ultraviolet monitoring is realized via a high crystal quality SnO 2 microwire (MW)-based photodetector (PD). This is then combined with 2D nitrogen-doped graphene (NGr), conducting polymer polypyrrole (PPy), and an in situ polymerization-fabricated composite film PPy-NGr to construct an organic–inorganic p–n heterojunction PD. The long response time brought on by the oxygen adsorption of SnO 2 MW is greatly decreased via coating with the aforementioned materials. A defect response is created by the surface dangling bonds of SnO 2 MW, which can be effectively suppressed by the PPy. Absorption in the deep ultraviolet region (<240 nm) by PPy results in a blue shift of the response peak of the PPy/SnO 2 heterojunction PD compared to that of a single SnO 2 PD. The introduction of NGr improves the detection performance by providing a smoother energy band migration to reduce photogenerated carrier recombination and stacking at the potential barrier. The ultrahigh responsivity of PPy-NGr/SnO 2 PD is 4594.25 A W −1 and the detectivity is 6.47 × 10 11 Jones, 40 and nine times greater, respectively, than those of a PPy/SnO 2 PD under a 5 V reverse bias and 240-nm light irradiation (18.75 µW cm −2 ). The novel strategy provides a reference for the future design of high-performance heterojunction PDs.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yang Wang,Rongkai Ren,Fang Chen,Liming Jing,Zhenhua Tian,Zhijian Li,Jianzhi Wang,Chen Hou
The polyfuoroalkyl substances, especially perfluorooctanoic acid (PFOA), are emerging as harmful environmental micropollutants that are known to globally contaminate water, air, and soil resources. Herein considering the urgent demand for the sensitive detection and effective degradation of PFOA present in water environment, a novel molecular imprinting polymer (MIP) MOFs (Co/Fe)-driven carbon nanofiber (Co/Fe@CNF) electrode has been developed for electrochemical detection and electro-Fenton (EF) degradation of PFOA. MIP was formed by one-pot step by electro-polymerization of the pyrrole in the presence of PFOA template on the Co/Fe@CNF. The MIP has a strong adsorption force on PFOA for the special O–H-π hydrogen bond between PFOA and the imprinting site, helped PFOA to access the surface of electrode. Therefore, the resulting MIP Co/Fe@CNF was able to detect PFOA with a good linear response in the range of 1 × 10 -8 –9 × 10 -5 M, and the limit of detection (LOD) was reached 1.073 × 10 -9 M. Moreover, the imprinted cavity on MIP can precisely adsorb PFOA and its intermediates to shorten the transmission distance between free radicals and targets, which enhanced the degradation ability in the EF process, and the targeted degradation efficiency reached 93% with 180 min.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yu Feng,Yanan Wang,Zijin Pang,Yunqing Zhuang,Yu-Shi He,Weimin Zhang,Jinglin Mu,Xin Huang
Electro-Fenton (EF) is a promising and green technology for environmental remediation. However, traditional EF often suffers from iron sludge production, leading to poor pH adaptation and secondary pollution. In this work, we synthesized a three-dimensional (3D) carbon nanotube architecture containing nitrogen and oxygen heteroatoms on carbon fibre paper (3D-NOCNTs/CFP) as an indirect catalyst for a metal-free EF process for the removal of 4-chlorophenol (4-CP). The dependence of the content and the type of the functional groups in the carbon plane on the pyrolysis temperature was studied through XPS measurements. This binder-free electrode has been identified as a bifunctional catalyst that can catalyze a high H 2 O 2 yield process and a subsequent in-situ generation of ⋅OH via an O 2 reduction reaction (ORR). Thus the generated ⋅OH radicals can directly participate in the oxidative degradation of 4-CP and the utilization of iron can be avoided in the EF process. The optimized electrode could remove 99.3 % 4-CP in 120 min and exhibits a broad suitability upon pH, an excellent capability, and a prominent stability for the degradation of 4-CP. The mechanism was explained by density function theory (DFT) calculations and the controlled experiments. Such a metal-free EF process features a promising green technology for the oxidative degradation of organic pollutants.
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CHEMOSPHERE
·
2022
·
IF 8.943
Wei Li,Huanyu Yue,Chunyan Zhang,Junyu Hu,Qiaoli Wang,Yuanming Li,Shihan Zhang,Jianmeng Chen,Jingkai Zhao
The chemical absorption-bioelectrochemical reduction (CABER) integrated system provides an alternative of good potential for NO removal. The efficient utilization of cathode electrons directly determines the system performance and operating cost. Herein, we synthesize a polypyrrole/carbon nanotubes (PPy/CNTs) composite to engineer a micro-and nanoscale interface with low resistance and high biocompatibility between the cathode and biofilms in the CABER system. The resulting PPy/CNTs biocathodes exhibit 36.4% increase in biomass density, 40.7%–302.6% increase in Faraday efficiency along Fe(III)EDTA reduction, and 204% increase in Fe(II)EDTA-NO reduction rate. The enrichment of functional microorganisms is validated to be a key strengthening factor, as the proportion of which increased from 57.9% to 84.6%. Moreover, for efficient electron transfer and utilization, a low-resistance electron transfer route, “electrode substrate → PPy (→ CNTs) → microbial cells → Fe(III)EDTA or Fe(II)EDTA-NO”, is realized in the multiscale conductive networks constructed of PPy/CNTs composite and microbial nanowires .
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高影响因子
Materials
·
2022
·Vol. 15
·期 9
·3408
·
IF 3.748
Leilei Zhang,Yihua Lv,Xiaoyun Ye,Lian Ma,Song Chen,Yuping Wu,Qianting Wang
In this study, zinc oxide (ZnO)/polypyrrole (PPy) composites with flower- and rod-like structures were successfully fabricated by in situ polymerization and the hydrothermal method and used as microwave absorption (MWA) materials. The surface morphologies, crystal structures, and electromagnetic features of the as-prepared samples were measured by field-emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and vector network analyzer (VNA). The results show that the conductive polymer PPy was successfully decorated on the surface of ZnO substrates. The MWA ability of flower- and rod-like ZnO/PPy composites is significantly enhanced after introduction of PPy. Rod-like ZnO/PPy composites exhibited superior MWA properties than those of flower-like ZnO/PPy. The former achieved a minimum reflection loss (RLmin) of −59.7 dB at 15.8 GHz with a thickness of 2.7 mm, and the effective absorption bandwidth (EAB,RL< −10 dB) covered 6.4 GHz. PPy addition and stacked structure of rod-like ZnO/PPy composites can effectively improve the dielectric properties, form multiple reflections of incident electromagnetic waves, and generate an interfacial polarization effect, resulting in improved MWA properties of composite materials.Keywords:ZnO;polypyrrole;composites;microwave absorption;dielectric loss
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Peng Lei,Ying Zhou,Bei Li,Yang Liu,Chuan Dong,Shaomin Shuang
The unique combination of DNA bases is essential for storing genetic information. A reliable and accurate electrochemical sensor based on a gold/palladium–polypyrrole/graphene nanocomposite (Au/Pd–PPy/GR) has been prepared to individually and simultaneously detect guanine (G), adenine (A), thymine (T), and cytosine (C). The bimetallic nanomaterial (Au/Pd–PPy) is used to enhance the sensing performance of DNA bases, and the GR could further increase the electroactive area and amplify the electrochemical response. As expected, the electrochemical sensor shows excellent electrocatalytic activity with well-separated current responses at 0.704 V (G), 0.976 (A), 1.164 (T), and 1.348 V (C). The prepared sensor exhibits the linear range of 1–350 μM for G, 5–300 μM for A, 20–900 μM for T, and 10–700 μM for C. The developed device is also demonstrated as an excellently sensitive and highly selective sensor to identify the four bases in calf thymus DNA, which provides the application of electrochemical sensors in bioscience.
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