JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2024
·
IF 4
Yifu Jiang,Le Lang,Jingwen Zhang,Yining Ji,Chenglong Zhang,Ruiqin Yang,Xuwen Li
This study combined the structural characteristics of amanita peptide toxins to prepare a Fe 3 O 4 /P4VPBA/PPy/GO composite material as a magnetic solid-phase extraction adsorbent. The experimental results indicated that this adsorbent showed excellent selectivity for the extraction of amatoxins and phallotoxins from mushroom samples. Compared with traditional dispersive solid-phase extraction, this adsorbent enables rapid separation in the enrichment and elution recovery stages through the application of a magnetic field . Simultaneously, the study optimized the conditions for ultraperformance liquid chromatography–mass spectrometry (UPLC–MS/MS), ensuring both separation efficiency and accuracy while reducing the analysis time. The researchers established the MSPE–UPLC–MS/MS method for the determination of amanita peptide toxins in wild mushrooms. This method not only simplified and expedited the sample pretreatment process but also achieved qualitative and quantitative analyses in a short period, thus demonstrating high detection sensitivity and outstanding recovery rates. Furthermore, the developed method was successfully applied to analyze toxic mushrooms discovered in Nanjing, China. The potential for extensive utilization of this method is highlighted in the field of food analysis and detection.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Rongli Fang,Le Zhang,Shunjiang Huang,Yanshuang Zhao,Shasha Zhang,Yue Wang
Capacitive deionization (CDI) is a hopeful alternative method in treating brackish water with low salt concentration. Molybdenum disulfide (MoS 2 ) has attracted widespread attention as a typical two-dimensional intercalation material, but its easy stacking structure and low conductivity greatly limit its practical application in CDI. This paper developed well-dispersed MoS 2 nanosheets tightly attached to hollow carbon spheres (HCS), and the DBS − ion doped polypyrrole (PPy-DBS) was coated on the surface of MoS 2 . HCS makes MoS 2 nanosheets have improved dispersion and increased layer spacing which provide enough active sites for ion intercalation and transfer. Furthermore, the PPy-DBS provides a convenient electron transport path, accelerates ion transport, ensures good electrical conductivity and reduces ion diffusion resistance.The resulting PPy-DBS-MoS 2 @HCS has a specific capacitance (168.77 F g −1 ) which is 2.32 times that of MoS 2 (72.9 F g −1 ). In addition, in 1.2 V, 500 mg L −1 NaCl solution, the asymmetric CDI cell HCS//PPy-DBS-MoS 2 @HCS displays an extremely high desalting capacity (53.4 mg g −1 ) that is 2.9 and 2.4 times higher than HCS//MoS 2 (18.3 mg g −1 ) and HCS//MoS 2 @HCS (22.3 mg g −1 ), respectively. Therefore, this unique 3D heterostructure (PPy-DBS-MoS 2 @HCS) provides a viable strategy for the development of CDI electrode materials.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Fengling Tang,Jing Yang,Ligang Lin,Zitian Liu,Qiying Wang,Wensong Ma,Huiyang Shang,Hao Wu,Aishan He
In the field of wastewater treatment, the efficient separation of dyes/salts and the high-pressure drive easily results in concentration polarization and membrane contamination. In this study, inspired by the capillary effect of natural sponge structure, an aerogel layer with a bionic three-dimensional mesh porous sponge structure was designed to construct an ultra-low-pressure membrane. With the assistance of tannic acid, the carboxymethyl cellulose (CMC) aerogel layer were constructed on the surface of polyvinylidene fluoride (PVDF) membrane using the layer-by-layer cross-linking and freeze-drying methods. The unique three-dimensional mesh structure of the aerogel provides a capillary effect that accelerates the rapid transport of water molecules. The introduction of polypyrrole (PPy) to the aerogel improves the mechanical properties of the aerogel, helping avoid the collapse during the separation process. Meanwhile, the formed PPy improves the membrane separation performance. The results showed, that under near-zero pressure conditions, the modified membrane had excellent dye/salt separation performance (dye rejection >99 %, salt rejection <10 %) and high flux of pure water (101.3 L·m −2 ·h −1 ). Moreover, the membrane also maintained good long-term stability. The study demonstrated the potential of using membrane for dye/salt separation applications by constructing bionic sponge-structured aerogels having capillary effect and good mechanical strength on membrane.
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高影响因子
Advanced Composites and Hybrid Materials
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2024
·Vol. 7
·期 1
·1-15
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IF 23.2
Wang Hao,Zheng Ruizhu,He Pengyu,Li Xiaoming,Shi Zhijun,Yang Guang
The formulation of an antibiotic-free antibacterial approach is imperative in circumventing escalating bacterial drug resistance. Electrical stimulation presents a viable therapeutic modality for such an approach. Nonetheless, obstacles persist in achieving efficacious sterilization with biosafe low-voltage electrical fields (EFs) and enduring antibacterial capabilities. In this study, we have devised a novel capacitive antibacterial dressing comprising polypyrrole-wrapped carbon cloth (PPy-CC) electrodes and a bacterial cellulose (BC) hydrogel separator. Subjected to 1 V electrical stimulation for 10 min, the dressing attains high bactericidal efficiency (up to 99.97%) and enhanced activity against multidrug-resistant (MDR) bacteria (up to 99.99%). Its considerable electric capacity and rechargeability allow for repeated charging to achieve sustained sterilization. In vivo results demonstrate significant inhibition of wound infection and facilitated wound recovery in infected full-thickness defects in mouse models. This represents an antibiotic-free, physically-stimulated treatment modality for infected wounds with considerable potential for clinical application. TOC A capacitive antibacterial dressing consists of polypyrrole-wrapped carbon cloth as electrode layer and bacterial cellulose hydrogel as separator with efficiently accelerated infected-wound healing. The resultant hydrogel dressing exhibits excellent high capacitance characteristics, good biocompatibility, efficient and sustained antibacterial ability after low voltage charging. It is an antibiotic-free, physical stimulation-based strategy for infected wounds.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Hang Wu,Liang Zhu,Lei Xie,Taiyu Zhou,Tengbo Yu,Yingze Zhang
Bacterial infections, excessive reactive oxygen species (ROS) accumulation and a persistent inflammatory response severely impede the wound healing process. In this study, we developed a novel multifunctional hydrogel dressing (LCPN) based on lipoic acid modified chitosan (LAMC), polypyrrole nanoparticles (PPy NPs) and nicotinamide mononucleotide (NMN) for accelerated healing of infected wounds. The synthesized LCPN hydrogel has several properties. Modification of lipoic acid significantly enhances the water solubility of chitosan making it easier to dissolve and absorb wound secretions. Interestingly, owing to the breaking and restructuring of disulfide bonds, LCPN can be quickly bonded under UV light without relying on photoinitiators. In addition, the incorporation of PPy NPs not only enhances the electrical conductivity of LCPN hydrogel, but also confers photothermal antimicrobial capability to LCPN hydrogel. More importantly, the sustained release of NMN in LCPN hydrogel can significantly enhance cell proliferation, migration and antioxidant capacity, which is conducive to accelerated wound healing. In vivo and in vitro experiments have shown that LCPN hydrogel has excellent biocompatibility and the ability to promote wound healing. Therefore, the prepared multifunctional hydrogel is expected to be used as a novel dressing to accelerate wound healing.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Xinyue Chen,Mingyan Yang,Linyu An,Jing He,Kunrong Lai,Yangyang Wang
Effective and practical cleanup of viscous crude oil spills is extremely important in real harsh marine environments. Herein, we designed a solar–driven, nanocellulose-based Janus aerogel (Janus-A) with excellent floating stability and dual function of oil–water separation and degradation of aqueous organic pollutants. Janus-A, with its amphiprotic nature, was prepared through polypyrrole (PPy) deposition, freeze-drying, octyltrichlorosilane (OTS) impregnation, TiO 2 spraying on the bottom surface, and UV irradiation treatment. The photothermal conversion effect of PPy coating raised the surface temperature of aerogel to 75.8 °C within 6 min under one simulated solar irradiation, which greatly reduced the viscosity of the crude oil and increased the absorption capacity of the aerogel to 36.7 g/g. Benefiting from the balance between the buoyancy generated by the hydrophobic part and water absorption of the hydrophilic part, Janus-A showed excellent floating stability under simulated winds and waves. In addition, Janus-A exhibited high degradation efficiency for organic pollutants in water owing to the synergistic photocatalytic properties of TiO 2 and PPy. These excellent performances make Janus-A ideal for integrated water–oil separation and water remediation.
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Yujing Sheng,Zenghao Li,Duanmin Gao,Panhong Niu,Xingfa Gao,Yuzhen Huang,Chuan Li,Jianfeng Qiu,Ruliang Zhang,Yinglun Sun
Intrinsically stretchable conductive materials based on elastic substrates and conductive components play important roles in biomedical applications, such as exercise rehabilitation monitoring and disease prediction. A persistent challenge is to combine high fatigue resistance with excellent mechanical properties in stretchable conductive materials. Herein, we present a stretchable conductive material with both good fatigue resistance and high tensile properties (∼3170%) based on poly(acrylic acid)-phytic acid-trehalose-polypyrrole (denoted as PPTP). The as-prepared PPTP hydrogel electrode showed no obvious cracking or delamination after 400 loading and unloading cycles and maintained good electrical signal transmission function after 1000 cycles. We further collected stable signals for human motion and handwriting using the stretchable hydrogel electrode as a strain sensor, demonstrating the potential application of the PPTP stretchable hydrogel electrode in biomedicine.
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ADVANCED FUNCTIONAL MATERIALS
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2024
·
IF 18.5
Ahmed Elhassan,Jialu Li,Ibrahim Abdalla,Ziao Xu,Jianyong Yu,Zhaoling Li,Bin Ding
The pursuit of eco-friendly electromagnetic wave absorption (EMWA) materials with multifunctional capabilities has garnered significant attention in practical applications. However, achieving these desired qualities simultaneously poses a significant challenge. This study introduces a single-step calcination and chemical polymerization process to obtain an environmentally friendly ant-nest-inspired hybrid composite by optimizing conductive polypyrrole nanotubes (PNTs) within a 3D carbonaceous structure. The biomimetic composite forms a highly efficient conductive network, providing a pathway for free electrons within the carbonaceous barriers and enhancing the conduction loss. Remarkably, the EMWA performance of the composite achieves ultrathin (1.6 mm), wide effective absorption band (5.4 GHz), and strong absorption intensity (−67.6 dB) features. Moreover, due to the complex and intertwined 3D continuous network, the obtained samples exhibit excellent thermal insulation and superhydrophobic behavior by inhibiting heat transfer and preventing localized areas from being prone to water absorption. These findings not only offer a sustainable and low-cost production route for biomimetic carbonaceous composites but also demonstrate a high-efficiency absorber with great multifunctionality as a green alternative to traditional EMWA materials.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuangqing Li,Xueke Jiao,Lili Chai,Zihan Su,Yushun Yang,Yafei Zhao,Yinze Yang,Dan Wang,Huishan Shang,Bing Zhang
Developing highly effective phase change composites (PCMs) featuring remarkable encapsulation, energy storage, conversion and management performance is of important significance for the practical utilization of organic solid-liquid PCMs. Herein, a secondary hierarchical structure (NSH) was constructed in nickel foam (NF) with silica fiber as scaffold for supporting halloysite (HNT) with polypyrrole (PPy) modification (HNT/PPy). The introduced HNT/PPy can narrow the pore size, intensify the optical absorption, and enhance the thermal and electrical conductivity of NF, while the inserted silica fiber network can prevent HNT/PPy with small particles to drop in the pores of the NF. When polyethylene glycol (PEG) is encapsulated in the NSH, the as-prepared PEG@NSH reveals an ultrahigh encapsulation rate (up to 87 % package), good shape stability (without any leakage at 100 °C with 82 % encapsulation) and excellent solar-thermal conversion capability (93 % of absorption rate, and 95.39 % of photothermal conversion efficiency). Meanwhile, the PEG@NSH also displays a significantly improved thermal conductivity (455 % of pure PEG). Combined the PEG@NSH composite with solar-thermal-electricity (STE) conversion device, efficient and stable voltage output of 907 mV and current output of 139.8 mA can be achieved at 3kW m −2 of light intensity. This work offers a straightforward construction approach for effective package of PCMs and efficient solar-thermal-electric energy conversion and management.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Yaping Xu,Chenyang Dang,Xiangkun Elvis Cao,Yunteng Cao,Jiu Huang,Yuxiang Xu,Minghui Shan,Rui Liu,Peng Li,Guiyin Xu,Meifang Zhu
Solar-driven interfacial evaporation is an efficient, green, and low-carbon footprint way to separate heavy metals from contaminated soil. A biomimetic mushroom-like evaporator based on polypyrrole-modified cotton fabric is designed, which uses the mechanism of evaporative diffusion and gravity to drive the separation of heavy metal salt crystals, achieving sustainable remediation heavy metal contaminated soil (HMCS). This stereo biomimetic evaporator not only achieves excellent evaporation performance under solar energy drive but also enhances evaporation efficiency by capturing environmental energy from the side and then using natural convection . At an air velocity of 6 m s −1 , the evaporation rate reaches 2.32 kg m −2 h −1 . After continuous operation for 192 h, the biomimetic evaporator maintains stable evaporation performance and successfully separates metal salt pollutants from the washing solution of HMCS. The removal rates of heavy metal ions Pb 2+ , Cr 3+ , Cd 2+ , Zn 2+ , and Hg 2+ in polluted soil are 53 %, 59 %, 60 %, 62 %, and 84 %, respectively. Compared to untreated control soil, the concentrations of Pb 2+ , Hg 2+ , Cr 3+ , Zn 2+ , and Cd 2+ in the roots of pea treated with solar evaporation remediation decreased by 66.4 %, 31.6 %, 31.1 %, 29.0 %, and 8.3 %, respectively. This study provides a potential new approach and method for the sustainable, low-cost, and low-energy remediation of HMCS using solar evaporation technology.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Ziyi Wang,Yuqin Wei,Zhaoli Xue,Lei Feng,Aijian Wang,Yan Sun,Chunsheng Li,Xinping Qiu,Long Zhao
Asymmetric metalloporphyrins are potential electrocatalysts to construct composites for efficient oxygen reduction reactions (ORRs) due to their inherent large dipole moment , which facilitates the charge separation. To find more effective molecular structures towards the ORRs, in particular their performance and electrolyte relationship, we rationally designed two A3B-type asymmetric cobalt porphyrin aPh-TCoP and aBA-TCoP with phenyl and benzoic acid as substituents, respectively. The ORR performance of the porphyrin-decorated carbon black composites was examined in five electrolytes at different pH values spanning from 0.7 to 13.7. It was found that aBA-TCoP/C exhibited better ORR activity and selectivity than aPh-TCoP/C in all solutions. Interestingly, both composites demonstrated their highest ORR activity in the pH13.7 electrolyte and exhibited 4-electron selectivity in the pH3.7 solution. This conclusion is drawn from a comprehensive analysis of various electrochemical properties , encompassing current density , reduction potentials, electron transfer numbers, and intermediate yields. The results illustrate the regulation of ORR properties by altering the electrolyte pH and a notable improvement in the ORR performance through the modification of porphyrin substituents. These findings offer a foundational understanding for the design of efficient metalloporphyrins and the attainment of controlled oxygen reduction in electrochemical devices .
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JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2011
·Vol. 49
·期 10
·2303-2313
·
IF 3.894
Tianbin Ren,An Wang,Weizhong Yuan,Lan Li,Yue Feng
Star-shaped amphiphilic poly(ε-caprolactone)- block -poly(oligo(ethylene glycol) methyl ether methacrylate) with porphyrin core (SPPCL- b -POEGMA) was synthesized by combination of ring-opening polymerization (ROP) and atom transfer radical polymerization (ATRP). Star-shaped PCL with porphyrin core (SPPCL) was prepared by bulk polymerization of ε-caprolactone (CL) with tetrahydroxyethyl-terminated porphyrin initiator and tin 2-ethylexanote (Sn(Oct) 2 ) catalyst. SPPCL was converted into SPPCLBr macroinitiator with 2-bromoisobutyryl bromide. Star-shaped SPPCL- b -POEGMA was obtained via ATRP of oligo(ethylene glycol) methyl ether methacrylate (OEGMA). SPPCL- b -POEGMA can easily self-assemble into micelles in aqueous solution via dialysis method. The formation of micellar aggregates were confirmed by critical micelle formation concentration, dynamic light scattering, and transmission electron microscopy. The micelles also exhibit property of temperature-induced drug release and the lower critical solution temperature (LCST) was 60.6 °C. Furthermore, SPPCL- b -POEGMA micelles can reversibly swell and shrink in response to external temperature. In addition, SPPCL- b -POEGMA can present obvious fluorescence. Finally, the controlled drug release of copolymer micelles can be achieved by the change of temperatures. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011
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