ACS Applied Polymer Materials
·
2023
·
IF 5
Yu Wang,Haihua Wang,Wenjing Zhang,Guiqiang Fei,Kewei Shu,Liyu Sun,Siyu Tian,Huizhu Niu,Mengxi Wang,Guangyu Hu,Yihao Duan
This work demonstrated a straightforward strategy to fabricate ultralong interconnected polypyrrole (PPy-GS) nanowires with a gemini surfactant (GS) as a soft template and dopant. Pure PPy particles and a PPy nanowire doped with CTAB (PPy-CTAB) were prepared for comparison. The results showed that the electrochemical performances, conductivity, and morphology of PPy-GS could be significantly changed by changing the concentration of GS in the aqueous phase owing to the different self-assembly behaviors. When the molar ratio of pyrrole, APS, and GS was 1:1:0.4, an interconnected ultralong and uniform PPy-GS nanowire with the largest surface area, the smallest average pore size, the lowest contact angle, and the highest conductivity can be obtained, resulting in the formation of effective electrolyte transport channels and faster electron transport pathways. Compared with pure PPy particles and the PPy-CTAB nanowire, the incorporation of GS significantly enhanced the conductivity and specific capacitance of PPy-GS-40%. The conductivity of PPy-GS-40% was up to 13.54 S/cm compared with 1.17 S/cm for PPy particles and 3.84 S/cm for the PPy-CTAB nanowire. Also, the highest specific capacitance of PPy-GS reached up to 556 F/g at 1 A/g compared with 233 F/g for PPy particles and 397 F/g for the PPy-CTAB nanowire. A total of 85.4% of the initial capacitance was retained even after 2000 cycles at 1.0 A/g. The energy density and power density of the PPy-GS-40% symmetrical supercapacitor were 49.4 Wh/kg and 400 W/kg, respectively. The good electrochemical properties of the PPy-GS electrode suggest a tremendous potential in the high-performance electrode not only for supercapacitors but extensively for various energy storage applications.
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高影响因子
GREEN CHEMISTRY
·
2023
·Vol. 25
·期 4
·1513-1521
·
IF 9.8
Zhe Wang,Zhuo Li,Liying Liu,Peizhi Cao,Shupeng Li,Gang Kevin Li
Post-combustion carbon capture from fossil fuels for concentrated sources such as power plants is considered as one of the efficient ways to mitigate CO2 emissions. However, conventional adsorbents in physical adsorption processes have faced challenges in the presence of moisture in flue gases. Here, we successfully synthesized polypyrrole (PPy) adsorbent using Fenton's reagent and demonstrated that the filtrate could be recycled for the synthesis of PPy. The single-component gas-adsorption capacities of PPy were measured to obtain CO2, CH4, and N2 adsorption amounts of 16.73, 5.19, and 1.06 cm3 g−1 at 303 K and 101 kPa, respectively. Calculations by the IAST method demonstrated that PPy had excellent gas selectivities for CO2/N2 and CO2/CH4 of 46 and 4.0, which could be utilized for CO2 separation in flue gases and biogas. To simulate flue gas carbon capture, we investigated the dynamic adsorption capacity of PPy on CO2 in the presence of water vapor using a breakthrough device in the laboratory. The CO2 adsorption capacity was twice higher in moisture than in dry conditions, which was attributed to the presence of water vapor-formed hydrogen bonds that enhance its adsorption capacity through electrostatic and acid–base interactions of CO2 with PPy. This green and facilely synthesized polypyrrole adsorbent has great potential for carbon capture in high humidity flue gases.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Fuling Wang,Xue Liu,Binghan Jiang,Hongyan Zhuo,Wenmiao Chen,Yanli Chen,Xiyou Li
Reducing the loading of Pt precious metal is the promising pathway to positively promote the large-scale application for fuel cells and water electrolysis. In this work, a composite bifunctional electrocatalyst (named Pt@Fe SA -N-C) consisting of the atomically dispersed FeN 4 active sites and Pt nanoparticles (NPs) is successfully prepared for oxygen reduction reaction (ORR) and hydrogen evolution reactions (HER). In the process of synthesizing precursor of Pt(OH) 4 -Fe-Ppy@CNFs, the Fe-Ppy@CNFs was firstly prepared where the highly dispersed Fe 3+ ions were pre-anchored into polypyrrole (PPy) matrixes through in-situ polymerization on the surface of cellulose nanofibers (CNFs) and then Pt(OH) 4 nano-particles were deposited on Fe-Ppy@CNFs through adjusting the pH of the solution by urea hydrolysis to obtain the Pt(OH) 4 -Fe-Ppy@CNFs. Compared with the commercial 20 wt.% Pt/C, the obtained Pt@Fe SA -N-C possesses 5.5 wt.% low Pt loading. The strong synergistic effect of dual active sites between Pt NPs and FeN 4 on one-dimensional (1D) Fe SA -N-C support with a large surface area ensures effectively exposure of Fe and especial Pt active sites in the Pt@Fe SA -N-C. Both ORR and HER activities of the Pt@Fe SA -N-C were greatly improved in acid and alkaline media, even outperforming the commercial 20 wt.% Pt/C. Furthermore, the Pt@Fe SA -N-C shows an unordinary stability, with no obvious decrease in the current density after 5000 and 1000 cycles of accelerated durability tests (ADTs) for ORR and HER processes, respectively. This work highlights a preparation strategy for the synergistic effect between low-loading Pt precious metal and non-precious metals in electrocatalytic system.
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高影响因子
ELECTROANALYSIS
·
2023
·Vol. 35
·期 5
·e202200298
·
IF 3
Rui Liu,Sai Zhang,Tianze Wang,Ningyan Hu,Xiao Ma,Liande Zhu
Nanostructured NiCu layered double hydroxides (NiCu LDHs) are synthesized in situ on polypyrrole nanotubes through convenient co-precipitation and hydrothermal synthesis. The nanostructured composite (NiCu LDHs/PPy) shows high electrocatalytic activities towards the glucose oxidation reaction in alkaline electrolyte so that a nonenzymatic glucose sensor is developed. It is demonstrated that the sensor offers a wide linear range from 1.5 μM to 1.0 mM with a high sensitivity of 525.8 μA mM −1 cm −2 and a low limit of detection of 66 nM (S/N = 3). The nonenzymatic sensor has been successfully applied to real blood samples for glucose monitoring with high accuracy.
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BIOCONJUGATE CHEMISTRY
·
2022
·
IF 6.069
Chunxiao Sui,Rui Tan,Zifan Liu,Xiaofeng Li,Wengui Xu
Imaging-guided photothermal therapy (PTT) in a single nanoscale platform has aroused extensive research interest in precision medicine, yet only a few methods have gained wide acceptance. Thus, it remained an urgent need to facilely develop biocompatible and green probes with excellent theranostic capacity for superior biomedical applications. In this study, a smart chemical oxidative polymerization strategy was successfully developed for the synthesis of Au@PPy core–shell nanoparticles with polyvinyl alcohol (PVA) as the hydrophile. In the reaction, the reactant tetrachloroauric acid (HAuCl4) was reduced by pyrrole to fabricate a gold (Au) core, and pyrrole was oxidized to deposit around the Au core to form a polypyrrole (PPy) shell. The as-synthesized Au@PPy nanoparticles showed a regular core–shell morphology and good colloidal stability. Relying on the high X-ray attenuation of Au and strong near-infrared (NIR) absorbance of PPy and Au, Au@PPy nanoparticles exhibited excellent performance in blood pool/tumor imaging and PTT treatment by a series of in vivo experiments, in which tumor could be precisely positioned and thoroughly eradicated. Hence, the facile chemical oxidative polymerization strategy for constructing monodisperse Au@PPy core–shell nanoparticles with potential for cancer diagnosis and imaging-guided photothermal therapy shed light on an innovative design concept for the facile fabrication of biomedical materials.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Meng Zhang,Yu Zhang,Yucong Chen,Xiaoru Tian,Lingzhi Liu,Yizhong Wang,Ruijie Guo,Hong Yan
MIL-88(Fe) was used as an oxidant and a hard template for the synthesis of polypyrrole (PPy) on its surface, and the formation of PPy made the surface of MIL-88(Fe) rougher as well as more voids formed in the interior. The increased specific surface area allowed more benzotriazole (BTA) (17.8 wt%) loaded on PPy/MIL-88 particles. BTA/PPy/MIL-88(Fe) was employed as a novel corrosion inhibitor to enhance the corrosion resistance of epoxy coating for carbon steel. BTA/PPy/MIL-88(Fe) filler improved the corrosion resistance of EP coating without/with artificial scratch by delaying the cathodic and anodic reactions in corrosive media. Both BTA and MIL-88(Fe) played the role of corrosion inhibitors, making EP coating possess active corrosion protection and pH-sensitive performance. Besides, BTA/PPy/MIL-88(Fe) enhanced the adhesion of EP coating by filling the pores inside.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Wei Fan,Yao Zhang,Yanli Sun,Shujuan Wang,Cong Zhang,Xichen Yu,Weiting Wang,Kai Dong
Antibacterial textiles play an important role in preventing the spread of infectious diseases. However, the development of their application is limited due to the lack of controlled release of antibacterial agents, low antibacterial efficiency and poor antibacterial durability under high temperature environment. The preparation of antimicrobial nanofibers by heating-controlled release and electrospinning may be an effective solution. In this paper, we prepared twisted composite yarns with high abrasion resistance, excellent electrothermal properties, light properties, antibacterial properties and slow-release properties using the technique of conjugate electrospinning combined with the conventional twisting process. With an applied voltage of 2 V, the temperature of the composite twisted fabric can reach 45 ℃, which obviously promotes the release of antibacterial agent in the nanofiber compared with the normal temperature. The photo thermoelectric properties of the yarn also enable body temperature management, with heating to high temperatures at low voltages. In addition, the twisted composite yarn inhibited S. aureus , E. coli and C. albicans up to 99.6 %, 95.7 % and 72.5 %, respectively, and the inhibition rate was almost unchanged after 20 times of water washing. The twisted composite yarn reported in the present article would provide a new methodology for to multi-functional textiles.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Qian Zheng,Bingyuan Huang,Xueying Du,Juan Zhang,Hongquan Fu,Hejun Gao,Yunwen Liao
Efficient capture of radioiodine is critical during nuclear fuel reprocessing and nuclear accidents. The development of material with excellent adsorption properties of radioiodine has always been a significant challenge. Three kinds of N-loaded conjugated polymers were prepared using the solvothermal method by changing the N-group in pyrrole . The effect of nitrogen type on the structure of conjugated polymers was investigated by SEM, BET, FT-IR, XPS , and EPR. Despite their low specific surface area, their mesoporous structure is conducive to transporting iodine molecules. The results showed that in the conjugated system , the adsorption capacity of alkyl tertiary amines for iodine was better than that of aminoethyl tertiary amines and secondary amines, and the maximum adsorption capacity could reach 737.4 mg/g. The adsorption mechanism of iodine on N-loaded conjugated polymer is mainly the interaction of charge transfer between iodine and N-aromatic in the organic solution.
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IONICS
·
2023
·Vol. 29
·期 3
·1019-1028
·
IF 2.8
Zou Yiming,Liu Pufang,Yan Yinglin,Chen Shiyu,Fan Chaojiang,Xu Rongfu,Wang Xianhui,Zhong Lisheng,Yang Rong,Xu Yunhua
Coating conductive polymers on carbon/sulfur (C/S) cathode is an effective strategy for improving electrochemical performances of lithium-sulfur (Li–S) batteries. Furthermore, the heteroatoms in conductive polymer coating exhibit positive effects on electrochemical property. Herein, the C/S cathode was coated by polypyrrole (PPy) and polythiophene (PTh) which were fabricated and systematically investigated to reveal the effect of nitrogen (N) and S heteroatoms on the electrochemical property. As expected, both experimental identification and theoretical calculation verified that the PPy containing N heteroatom-coated C/S cathode possessed strong chemical adsorption capability for soluble polysulfides, which suppressed shuttle effect more effectively and displayed a more stable cycling life, while the PTh@C/S cathode containing S atom presented less Li + diffusion energy barrier, which exhibited reduced polarization and superior rate performance. This work demonstrated the specific functions of N and S heteroatoms in conductive polymer coating on C/S cathode materials, indicating their promising application for advanced Li–S batteries.
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高影响因子
e-Journal of Surface Science and Nanotechnology
·
2023
·Vol. 21
·期 1
·1-8
·
IF 0.7
J. F. Huang,F. H. Tao,F. Y. Li,Z. Y. Cai,L. Z. Pei
Polypyrrole (PPy)/CuBi2O4 nanosheets (NSs) were prepared by an in situ polymerization process and the NS-modified glassy carbon electrode (GCE) for electrochemical determination of benzoic acid was studied. The structure, morphology, and functional groups of the PPy/CuBi2O4-NSs were analyzed by X-ray diffraction, transmission electron microscopy (TEM), high-resolution TEM, and Fourier transform infrared spectroscopy. The obtained NSs contain a tetragonal CuBi2O4 phase, and nanoscale PPy particles attach to the surface of the NSs. The electrochemical responses of the PPy/CuBi2O4-NS-modified GCE in 0.1 M KCl solution with benzoic acid were investigated by the cyclic voltammetry (CV) and electrochemical impedance spectroscopy. An irreversible CV peak is located at −0.84 V on the PPy/CuBi2O4-NS-modified GCE in 2 mM benzoic acid and 0.1 M KCl solution. The intensities of the CV peaks show linear variation with increasing the scan rate and concentration of benzoic acid. The linear range is 0.001−2 mM with a detection limit of 0.52 μM. The PPy/CuBi2O4-NS-modified GCE shows high stability and reproducibility. The prepared PPy/CuBi2O4-NSs have great promise in the electrochemical detection of benzoic acid.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 6
·2619-2633
·
IF 4.5
Yang Lei,Liu Duan,Luo Jianhong
The new polypyrrole tin boratophosphate (PTB) material has been synthesized for the first time in this work. A series of characterization analyses of the PTB by FTIR, XRD, TGA, SEM, TEM and EA have proved that PTB is amorphous ion nanocomposites, which shows that the PTB has excellent chemical stability in complex acidic and organic environments and commendable selectivity for Pb 2+ as well. The adsorption mechanism of the PTB adsorption process was studied in detail from the aspects of thermodynamics, kinetic and adsorption isotherm. It is proved that the adsorption kinetic model conforms to the quasi second-order kinetic model, while the adsorption isotherm is consistent with the Langmuir model. It is also proved that the adsorption of Pb 2+ ions by the PTB is spontaneous endothermic process. In conclusion, the PTB cation exchange material synthesized in this paper has a good application prospect in the removal of Pb 2+ from industrial and domestic sewage.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Suozhu Wu,Jie Mao,Yiqin Zhang,Shurong Wang,Meijun Huo,Hongyuan Guo
A sensitive electrochemical method for detecting enrofloxacin was proposed using carboxylated multi-walled carbon nanotubes-reduced graphene oxide (MWCNT-COOH-RGO) nanocomposites. The MWCNT-COOH-RGO nanocomposites were firstly electrodeposited on a bare electrode, followed by electropolymerization of molecularly imprinted polymers. Enrofloxacin was determined by the mechanisms of direct electrocatalytic oxidation and molecularly imprinted recognition, respectively. Under the optimized conditions, a response range of 5.0×10 –7 M to 5.5×10 –5 M and limit of detection (LOD) of 2.3×10 –7 M were obtained by direct electrocatalytic oxidation of enrofloxacin using chronoamperometry. By contrast, the response range of 1.0×10 –10 M to 5.0×10 –5 M and LOD of 2.5×10 –11 M were achieved by molecularly imprinted recognition of enrofloxacin using square-wave voltammetry. Moreover, the proposed method exhibited good repeatability, stability and selectivity, and could be used for enrofloxacin detection in egg samples with satisfactory results.
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