JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Shuangqing Li,Ning Zhang,Heqiu Chen,Zongrui Zhang,Yafei Zhao,Yinze Yang,Huishan Shang,Dan Wang,Bing Zhang
Exploiting inexpensive composite phase change materials (PCMs) with comprehensive characteristics of high encapsulation efficiency, good leakage resistance, strong flexibility, high heat conductivity, and powerful light absorption is considerably imperative for their solar-thermal and solar-thermal-electric conversion. Herein, polypyrrole (PPy) modified halloysite (HNT/PPy) was assembled into the pores of melamine formaldehyde (MF) sponge to construct hierarchical porous structure (MHP), in which PPy serves as light absorber and heat conducting agent to consolidate the light absorption and thermal conductivity, while the interwoven HNT in MF not only acts as carrier to provide sufficient space for guaranteeing more PCMs’ encapsulation, but also dramatically narrows MF’s pore size and prevents PCMs’ leakage. As expected, the MHP can encapsulate as high as 95 wt% of polyethylene glycol (PEG) with extremely high latent heat of 177.8 J g −1 (PEG@MHP). The rich hydroxyl groups on PEG, PVA and HNT form strong hydrogen bond interaction, effectively improving the leakage-proof performance of PEG@MHP. Especially, PEG@MHP with 82 wt% encapsulation ratio (PEG@MHP-82) demonstrates unexceptionable leakage resistance (negligible leakage at 100 °C), strong light absorption (97 %), good photothermal conversion efficiency (90.36 %), and high thermal conductivity (0.235 W m −1 K −1 ). Except that, the solar-thermal-electric (STE) conversion system assembled with PEG@MHP-82 enables efficient voltage and current outputs of 587 mV and 83.3 mA respectively under 3 kW m −2 with heat dissipation in water. Encouragingly, the voltage output still achieves 154.7 mV under actual outdoor illumination (0.984 kW m −2 ). This work provides a simple method to efficiently encapsulate PCMs for realizing high-efficiency solar-thermal and solar-thermal-electric conversion.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2024
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IF 2.6
Ravichandran Balamurali,Narayanan Naresh,Ravichandran Sabarinathan,Liu Huiyuan,Zhang Weiqi,Bhuvanendran Narayanamoorthy,Su Huaneng
In this study, PtCo alloy nanoparticles (NPs) were successfully synthesized and deposited on nitrogen-rich carbon nanosheets derived from Polypyrrole-g-C 3 N 4 using a chemical reduction method. This electrocatalyst not only offers enhanced catalytic efficiency but also significantly improves the stability for the oxygen reduction reaction (ORR) in in acidic medium. In terms of electrocatalytic performance, the PtCo/CN@PPY-g-C 3 N 4 catalyst demonstrated a mass activity of 0.378 mA µg Pt −1 at 0.85 V, 0.131 mA µg Pt −1 at 0.9 V and a specific activity of 2.900 mA cm Pt −2 at 0.85 V, 1.004 mA cm Pt −2 at 0.9 V which are respectively 2.3, 2.8 and 10, 12 times higher than those of a commercial 20% Pt/C catalyst (0.166 mA µg Pt −1 at 0.85 V, 0.046 mA µg Pt −1 at 0.9 V and 0.285 mA cm Pt −2 at 0.85 V, 0.079 mA cm Pt −2 at 0.9 V). This indicates superior catalytic activity. Furthermore, after 5000 cycles, the PtCo/CN@PPY-g-C 3 N 4 retained approximately 77% at 0.85 V and 83% at 0.9 V of its initial mass activity, with only a 14 mV decrease in the half-wave potential, whereas commercial 20% Pt/C catalyst retained only 40% at0.85 V and 30% at 0.9 V of its initial mass activity. These enhancements can be attributed to the synergistic effects and strong interactions between the Pt–Co alloy nanoparticles and the carbon nitride support. The findings of this study underscore the potential of PtCo/CN@PPY-g-C 3 N 4 as a viable and efficient alternative to traditional catalysts in electrochemical applications.
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Frontiers in Environmental Science
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2024
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IF 3.3
Ma Rong,Yu Shuangshuang,Li Yafang,Lin Yan,Ma Xiaodong
Background: With the growing use of nitrogen-containing pesticides in agriculture, their residues in the environment have raised significant public health concerns.Objective: This study aimed to develop a novel PPy-DBSA/IT-SPME coating to enhance the detection efficiency of polar nitrogen-containing pesticides in water matrices.Methods: The preparation conditions were optimized, including pyrrole concentration at 7.0 mol/L, DBSA concentration at 0.014 mol/L, oxidant concentration at 0.35 mol/L, and a coating cycle repeated 10 times. High-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was employed for detection.Results: The novel coating effectively adsorbed 19 different categories of polar nitrogen-containing pesticides, including sulfonylureas, triazolopyrimidines, diphenyl ether herbicides, benzoylurea insecticides, and phenylurea herbicides, with unadsorbed rates below 10%. The analytical method achieved an average recovery rate of 61.92% to 115.21%, with an RSD below 5.0%. Detection and quantification limits ranged from 0.012 to 0.524 μg/L and 0.127 to 5.243 μg/L, respectively.Conclusion: The developed method is green, efficient, simple, and cost-effective. It offers an environmentally friendly and user-friendly approach for the detection of polar nitrogen-containing pesticide residues, demonstrating good recovery and precision. This method holds potential for wide application in environmental monitoring and food safety.
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RARE METALS
·
2024
·Vol. 43
·期 7
·3185-3193
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IF 9.6
Yuan Jing-Bo,Feng Zhi-Hong,Li Dong-Chan,Luo Yang,Zhou Yun-Lei
Electronic textiles, an emerging class of electronic technology, offer exciting opportunities for seamless integration with the human body. Numerous applications have been developed based on electronic textiles. However, researches on integrating multiple electronic textile-based devices are still few. In this study, we present a system integrated with an electrocardiogram monitoring sensor and an electroluminescence device based on stretchable and washable conductive microtextiles. The signal is acquired by an electrocardiograph amplifier and displayed by a dual-color electroluminescence device based on the processed results. The integrated electronic device has excellent moisture permeability and comfort for long-term wearing. The system reported in this study opens a new avenue for the application of electronic textiles in health monitoring, robotic prosthetics, and competitive sports. Graphical abstract
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Journal of Materials Chemistry A
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2025
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IF 9.5
Hui Wang,Xuefeng Zhang,Xiangfeng Wu,Yewei Kang,Yirui Huang,Zhaoye Zhao,Ziyan Li,Tingting Zhou,Junchuan Wang,Wei Zhu,Chengsi Pan
Bimetallic iron-based metal organic frameworks (MFe-MOFs) exhibit promising photocatalytic properties but face challenges typical of pristine MOFs, including low photoresponsive activity, inadequate band gap regulation, and weak photoconductivity. Here, we designed porphyrin-based COFs (TpPAM-COFs) to serve as a shell grown on NH2-Fe-MIL-101 nanoparticles (NPs) using an in situ solvothermal approach. Subsequently, a ligand-anchoring full-range metallization process was applied to introduce hetero metal ions throughout the core–shell composites, establishing a type-II scheme heterojunction (Fe/Cu-M@PC-Cu) via covalent bonding between NH2-Fe/Cu-MIL-101 and Cu-TpPAM-COFs. The Cu-TpPAM-COF shell, with broad light absorption range, enhanced the generation of photogenerated electrons, facilitating the reduction of Cu2+ and Fe3+ within the Fe/Cu-M@PC-Cu heterojunction and promoting the regeneration of Cu+ and Fe2+ Fenton active sites. Moreover, rapid electron transfer between Fe3+ and Cu+ centers amplified the Fe3+/Fe2+ redox cycle, accelerating the catalytic decomposition of H2O2 and increasing ·OH radical production. Additionally, the optimized bandgap structure of Cu-TpPAM-COFs enhanced the oxidation capacity, as evidenced by the Fe/Cu-M@PC-Cu composite achieving exceptional photo-Fenton catalytic efficiency with 92.7% tetracycline hydrochloride (TCH) degradation in 35 minutes, surpassing that of most reported similar catalysts. Furthermore, the composite showed excellent stability, with only an 11.9% loss in photo-Fenton degradation efficiency after 8 cycles, highlighting its great potential for addressing challenging environmental pollutants.
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Surfaces and Interfaces
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2024
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IF 5.7
Qiyang Guo,Ruixiang Yao,Huili Cheng,Kai Yin,Xiangrong Chen,Yaqing Lu,Ashish Paramane
The strategy of functionalized PS-NPs via PPy (PPy@PS-NPs) forming heterogeneous interface composition is highly efficient in increasing the insulation properties of linear low-density polyethylene (LLDPE). The morphology results show that PPy@PS-NPs are monodispersed in the LLDPE matrix after melting blend, which exhibits unparalleled engineering application value. The electrical insulation results show that PPy@PS-NPs introduced into the LLDPE matrix can reduce its DC electrical conductivity, enhance DC breakdown strength, and inhibit space charge accumulation. When the PPy@PS-NPs concentration is 0.5 wt%, the DC breakdown strength is 35.3 % higher than that of LLDPE. Mechanism research indicates that the depths of carrier traps are decreased due to high electron affinity caused by the introduction of PPy@PS-NPs, but the trap density is increased. The reported strategy of using functionalized polymer nanoparticles to improve the polymer insulation property provides new insights for developing future high-insulation materials and other functional materials based on functionalized polymer nanofillers.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Xiaona Fu,Xu Pan,Qing Wen,Ye Chen,Cunguo Lin,Haiping Gao,Zhenghui Qiu,Liuqingying Yang,Haitao Xu
Microbial fuel cell (MFC) shows potential as an environmentally friendly energy technology, but the low power density restricts their practical applications. In this study, polypyrrole (PPy), carbon nanotubes (CNTs) and MoSe 2 were synthesized into a novel nanocomposite (PPy/MoSe 2 /CNTs) via a straightforward hydrothermal and in situ polymerization approach and served as the anode material of MFC. The charge transfer resistance (R ct ) of the PPy/MoSe 2 /CNTs (4.75 Ω) anode was significantly lower than that of PPy/MoSe 2 (13.75 Ω) anode and MoSe 2 /CNTs (12.36 Ω) anode. Furthermore, the maximum power density of the PPy/MoSe 2 /CNTs-MFC was 4.43 W/m 2 , which was 1.99 times and 1.61 times higher than that of the PPy/MoSe 2 -MFC (2.22 W/m 2 ) and MoSe 2 /CNTs-MFC (2.74 W/m 2 ), respectively. High-throughput sequencing confirmed that PPy/MoSe 2 /CNTs bioanode demonstrated outstanding biocompatibility and the function of screening excellent electrogenic microbes. On the one hand, the good bioelectrocatalytic performance of the PPy/MoSe 2 /CNTs bioanode could be attributed to the abundant pyrrolic nitrogen in PPy, which enhanced the attachment of C-type cytochrome (Omcs) and promoted the direct electron transfer (DET) process between the biofilm and the electrode. In addition, the conductive bridging Mo–N bonds further promoted the direct transfer of electrons in PPy, mediating the long-distance DET process. On the other hand, well-dispersed MoSe 2 not only provided numerous active sites, but also enhanced the Se cycle of microorganisms by affecting their energy metabolism pathways, thereby improving their electricity generation capacity. In addition to the above, the high electrical conductivity of CNTs increased the interfacial charge transfer rate. This study explored the use of molybdenum-based ternary material as anode material to construct high-performance MFC, which provided meaningful information for future practical applications of MFC.
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JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Wentao Zheng,Jialing Chen,Yujiao Jia,Nengqi Sun,Shiping Wang,Xianku Wu,Xuehua Zhang
A series of 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU)/N-heterocyclic DESs aqueous solutions were designed and synthesized as CO 2 capture agents. They showed excellent performance in absorption capacity, especially for the low-pressure CO 2 . The CO 2 loads in the absorbents were higher than 1.0 mol/mol when the pressure was just 0.1 bar. Through a combination of 13 C NMR spectra, FT-IR spectra and absorption experiments, a novel absorption mechanism was proposed. It was the shuttling role of the carbamate generated from CO 2 and nitrogen heterocycles, along with the synergistic roles of the DBU and water, that caused the high absorption capacity of the DBU/N-heterocyclic DESs for CO 2 . Meanwhile, the thermodynamic parameters, the activation energy and the regeneration efficiency were all measured to estimate the absorption performance of the DBU/N-heterocyclic DESs aqueous solutions for low-concentration CO 2 .
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
·
IF 6.9
Yun Xue,Xingan Feng,Jiadong Wang,Jianzhang Gao,Lijun Zhang,Qi Chen,Fuqiu Ma,Yongde Yan
The immobilization of uranium in nuclear wastewater is of paramount importance for environmental and human health. However, there is a paucity of research on the immobilization of uranium in alkaline wastewater, particularly with regards to the application of novel electrodes. This article presents the utilization of an electrochemically polymerized polypyrrole stainless steel (PPy-SUS304) electrode for the effective electrochemical deposition and removal of uranium from alkaline wastewater containing uranium. According to the electrodeposition results, the uranium deposition efficiency of the novel electrode reached 96.82 %, with a uranium deposition rate of 0.048 mg U/(h·cm 2 ) and a charge efficiency of 0.055 mg U/C. These findings demonstrate the successful electrochemical reduction of UO 2 (CO 3 ) 3 4- in alkaline uranium-containing wastewater using the novel electrode, resulting in improved charge deposition efficiency. The electrode surface products were investigated using scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), and X-Ray Photoelectron Spectroscopy (XPS). The SEM and EDS results demonstrate the formation of a uniform PPy film on the surface of SUS304. In addition, the White light interferometer (WLI) test reveals that the PPy-SUS304 electrode exhibits increased roughness compared to the SUS304 electrode. The XPS results revealed that the electrode surface products of PPy-SUS304 were actually U compounds constituted of U(IV) oxides or hydroxides. This study provides a new perspective for the development of novel electrodes to suppress side reactions and efficiently recover uranium from alkaline uranium-containing wastewater.
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APPLIED CATALYSIS A-GENERAL
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2024
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IF 4.7
Zhi Cao,Yin Wang,Chao Liu,Haitao Cao,Zhongfei Han,Tao Shen,Gang Qi
A series of porphyrin-based porous organic polymer-supported Ag nanoparticle, Ag(0)@POP -x were prepared by the reaction pathway of ion coordination followed by hydrogen reduction. The resulting composite Ag(0)@POP -6.52 shows excellent catalytic performance toward the selective oxidation of HMF to HMFCA, and an impressive HMFCA yield of 97.2% (Na 2 CO 3 2 eq, O 2 2.0 MPa 90 min, 100 °C). Analysis techniques such as ICP-OES, XRD, TEM, SEM, N 2 adsorption-desorption, and XPS was employed to characterize the structure and properties of Ag(0)@POP -6.52 . The reaction conditions including the type of base and solvent, base and catalyst dosage, oxygen pressure, reaction temperature and time were studied in detail to improve the yield of HMFCA. Furthermore, the catalytic stability of the Ag(0)@POP -6.52 was evaluated by leaching and reusing tests, the results shows that the catalyst has good stability and robustness structure. Finally, the other aldehydes oxidation over Ag(0)@POP -6.52 was tested for investigation the substrate scope of Ag(0)@POP -6.52 .
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Polymers
·
2024
·Vol. 16
·期 8
·1160
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IF 4.7
Ahmed Elhassan,Xiaoshuang Lv,Ibrahim Abdalla,Jianyong Yu,Zhaoling Li,Bin Ding
Ever-increasing electromagnetic pollution largely affects human health, sensitive electronic equipment, and even military security, but current strategies used for developing functional attenuation materials cannot be achieved in a facile and cost-effective way. Here, a unique core-shell-like composite was successfully synthesized by a simple chemical approach and a rapid microwave-assisted carbonization process. The obtained composites show exceptional electromagnetic wave absorption (EMWA) properties, including a wide effective absorption band (EAB) of 4.64 GHz and a minimum reflection loss (RLmin) of −26 dB at 1.6 mm. The excellent performance can be attributed to the synergistic effects of conductive loss, dielectric loss, magnetic loss, and multiple reflection loss within the graphene-based core–shell-like composite. This work demonstrates a convenient, rapid, eco-friendly, and cost-effective method for synthesizing high-performance microwave absorption materials (MAMs).
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Food Chemistry-X
·
2024
·
IF 6.5
Jingtao Wu,Yonghui Xia,Tianyu Wang,Yafeng Zhang,Guangli Li
An ultrasensitive and selective voltammetric platform combined a molecularly imprinted poly(pyrrole) membrane with Ag-nanoparticle-functionalized black phosphorus nanosheets (MIP/BPNS-AgNPs) was developed for trace GAT detection. The physicochemical properties of the MIP/BPNS-AgNPs were studied by various spectroscopic and electrochemical techniques. BPNS-AgNPs improved the ambient stability and electrochemical activity of the BPNS and possessed a large surface area for accommodating abundant templates to produce specific imprinted sites. The resulting MIP/BPNS-AgNP-modified glassy carbon electrode (GCE) greatly enhanced voltammetric responses for GAT. The MIP/BPNS-AgNP/GCE exhibited admirable GAT determination performance, with two linear responses (0.001–1 and 1–50 μM), high sensitivity (9.965 and 0.5378 μA μM −1 ), and a low detection limit of 0.2 nM. In addition, the MIP electrode could selectively detect GAT in complex matrices and retain roust responses for a month. The applicability of MIP/BPNS-AgNP/GCE toward the detection of GAT in pharmaceutical formulations, milk, and human serum was verified with satisfactory results.
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