CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Hanchen Lin,Like Ning,Tingting Dai,Wei Wei,Ning Ma,Mei Hong,Fei Wang,Chaoqun You
The Pine wood nematode disease is a significant biological threat to forestry management and ecological restoration worldwide, with chemical control remaining the primary approach. However, the cryptic nature of pine wood nematodes (PWN) limits the effectiveness of conventional pesticides. This study explores the development of a cellulose network carrier-based nanopesticide (Se@CSM/PDA@AZO-CNF) loaded with selenium nanoparticles, offering dual responsiveness to light and temperature. This innovative design enables the precise release of pesticides under natural conditions, supporting a controlled response. Incorporating selenium nanoparticles into the cellulose-based nanopesticide improved pesticide permeability and deposition in pine trees. The contact angle of pesticides on pine needles decreased by 23°, their resistance to washing increased by 39 %, and cumulative release was significantly enhanced under UV light and low temperatures. Fluorescence tracer experiments demonstrated efficient uptake of Se@CSM/PDA@AZO-CNF nanopesticide by PWN. The hydrogel displayed an LC 50 value of 29.1 mg/L against PWN. These findings highlight the potential of this nanopesticide to improve pesticide delivery and efficacy in controlling pine wood nematode disease.
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NATURE
·
2024
·Vol. 630
·期 8017
·643-647
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IF 50.5
Zhang Qiubo,Song Zhigang,Sun Xianhu,Liu Yang,Wan Jiawei,Betzler Sophia B.,Zheng Qi,Shangguan Junyi,Bustillo Karen C.,Ercius Peter,Narang Prineha,Huang Yu,Zheng Haimei
Electrified solid–liquid interfaces (ESLIs) play a key role in various electrochemical processes relevant to energy 1 , 2 , 3 , 4 , 5 , biology 6 and geochemistry 7 . The electron and mass transport at the electrified interfaces may result in structural modifications that markedly influence the reaction pathways. For example, electrocatalyst surface restructuring during reactions can substantially affect the catalysis mechanisms and reaction products 1 , 2 , 3 . Despite its importance, direct probing the atomic dynamics of solid–liquid interfaces under electric biasing is challenging owing to the nature of being buried in liquid electrolytes and the limited spatial resolution of current techniques for in situ imaging through liquids. Here, with our development of advanced polymer electrochemical liquid cells for transmission electron microscopy (TEM), we are able to directly monitor the atomic dynamics of ESLIs during copper (Cu)-catalysed CO 2 electroreduction reactions (CO 2 ERs). Our observation reveals a fluctuating liquid-like amorphous interphase. It undergoes reversible crystalline–amorphous structural transformations and flows along the electrified Cu surface, thus mediating the crystalline Cu surface restructuring and mass loss through the interphase layer. The combination of real-time observation and theoretical calculations unveils an amorphization-mediated restructuring mechanism resulting from charge-activated surface reactions with the electrolyte. Our results open many opportunities to explore the atomic dynamics and its impact in broad systems involving ESLIs by taking advantage of the in situ imaging capability.
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Coatings
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2024
·Vol. 14
·期 5
·546
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IF 2.9
Jun Xu,Dongyu Li,Hanli Wang,Bianli Quan
Organic montmorillonite (OMMT) was prepared from Na-montmorillonite (MMT) by Hexadecylamine (HDA) modification. The composite material has good smoothness, acidity, and salt resistance. OMMT was characterized using small-angle X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and a video optical contact angle measuring instrument. The results showed that the layer spacing was enlarged from 1.44 nm to 2.87 nm after the modification, and the hydrophobicity performance was greatly improved. The organic modification of MMT was successful. The surface morphology, roughness, and anticorrosion properties of the organic montmorillonite/epoxy (OMMT/EP) composite coating were investigated and compared with those of the epoxy (EP) coating. The OMMT/EP composite coating had a flatter surface than the EP coating. The roughness was reduced from 65.5 nm to 10.3 nm. The electrochemical impedance spectroscopy showed that the composite coating’s thickness positively affected its anticorrosion performance, the corrosion current density (Icorr) decreased with the increase in thickness, and its maximum impedance was much larger than that of EP coating. The protection efficiency of the OMMT/EP composite coating was 77.90%, which is a significant improvement over the EP’s 31.27%. In addition, the corrosion resistance of the composite coating gradually decreased with increasing immersion time, but the change was insignificant.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2024
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IF 3.8
Zhang Shuang,Jiang Yunhao,Lei Wenli,Zhai Yueming,Liu Juejing,Lyu Xingyi,Li Tao,Guo Xiaofeng,Zhao Yuanmeng,Shan Changsheng,Niu Li
The development of cost-effective and highly efficient electrocatalysts is critical to help electrochemical non-enzymatic sensors achieve high performance. Here, a new class of catalyst, Ru single atoms confined on Cu nanotubes as a single-atom alloy (Ru 1 Cu NTs), with a unique electronic structure and property, was developed to construct a novel electrochemical non-enzymatic glucose sensor for the first time. The Ru 1 Cu NTs with a diameter of about 24.0 nm showed a much lower oxidation potential (0.38 V) and 9.0-fold higher response (66.5 μA) current than Cu nanowires (Cu NWs, oxidation potential 0.47 V and current 7.4 μA) for glucose electrocatalysis. Moreover, as an electrochemical non-enzymatic glucose sensor, Ru 1 Cu NTs not only exhibited twofold higher sensitivity (54.9 μA mM −1 cm −2 ) and wider linear range (0.5–8 mM) than Cu NWs, but also showed a low detection limit (5.0 μM), excellent selectivity, and great stability. According to theoretical calculation results, the outstanding catalytic and sensing performance of Ru 1 Cu NTs could be ascribed to the upshift of the d-band center that helped promote glucose adsorption. This work presents a new avenue for developing highly active catalysts for electrochemical non-enzymatic sensors. Graphical Abstract
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Surfaces and Interfaces
·
2024
·
IF 5.7
Lu Yang,Xi Chen,Jingxiang Zhang,Haoliang Zhang,Qiuying Zhao,Haiyan He,Huajie Huang,Yanjie Wang
High-efficient and recyclable piezo-photocatalysts are garnering substantial attention in line with the advancements in environmental purification. Herein, a novel micropatterned piezo-photocatalytic composite film, wherein BaTiO 3 @TiO 2 core-shell nanoparticles are embedded within porous poly(vinylidene fluoride) matrix, is developed. The impressive synergy between photocatalytic and dual piezocatalytic effects emanating from integrated components contributes to significantly amplified piezo-photocatalysis process. Moreover, by modulating the geometric structure of nanofiller along with topographical pattern design, one can further harness the piezo-photocatalysis effect upon electrical poling. As a result, the newly-developed composite film exhibits distinguished piezophotocatalytic activity, i.e., the degradation efficiency of highly-concentrated Methyl Orange (MO) solution (C 0 = 10 mg/L, 100 mL) reaches 97.3 % within 90 min, implying its viability as high-performance piezo-photocatalysts.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Luyun Xue,Xianbo Yang,Nan Wu,Meng Shao,Jin Wang,Yihuan Peng,Yafang Li,Xupin Zhuang
The growing threat of airborne particulate matter and pathogenic microorganisms to public health necessitates advanced air purification technologies capable of simultaneously removing particles and inactivating pathogens. In this study, we present a composite air filter based on a copper nanowire-modified phenolic resin meltblown nonwoven mat (CuNWs-PRMBM), which integrates physical filtration with Joule heating-induced sterilization. The PRMBM substrate, fabricated via melt-blowing, exhibits excellent thermal stability (decomposition temperature >450 °C) and low thermal conductivity (0.0369 W/m·K), offering a robust platform for Joule heating applications. Surface-deposited copper nanowires establish an efficient conductive network, enabling rapid (≤10 s) and uniform heating up to 124.6 °C under a low voltage of 3.0 V, with exceptional cycling stability. The composite displays superior filtration efficiency, achieving 99.6 % PM 2 . 5 removal at a low pressure drop of 87 Pa under 32 L·min −1 airflow, and maintains 94.9 % efficiency even at 85 L·min −1 . Furthermore, at 2.5 V (102.6 °C), the filter achieves complete inactivation of both S. aureus and E. coli within 15 min. Long-term tests confirm consistent performance over 120 h with sustained removal efficiencies exceeding 99.7 %. This work demonstrates a practical strategy for developing energy-efficient and safe air purification systems suitable for air purifiers and heating, ventilation, and air conditioning applications.
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LANGMUIR
·
2025
·
IF 3.9
Hanli Wang,Bianli Quan,Jun Xu,Dongyu Li
In this study, the corrosion environment in the evaporation stage of alumina production by the Bayer process was simulated, and TiO2-MMT/EP composite coating was prepared on the surface of Q235 steel. Montmorillonite (MMT) was functionalized via cation exchange and surface grafting using 3-aminopropyl triethoxysilane (KH550), enabling the introduction of organic groups onto the MMT surface and intercalation into its interlayer spacing. After compounding with titanium dioxide, the interlayer spacing of MMT was enlarged (from 1.27 to 2.13 nm) and its hydrophobicity was enhanced (contact angle from 48.14° to 105.6°). TiO2-MMT was added to epoxy resin (EP) to prepare a composite coating with multidimensional synergistic effect. The results show that the composite material can effectively fill the EP microhole defects, and the surface roughness of the coating is only 1.7 nm (pure EP is 65.5 nm). Electrochemical tests reveal that the corrosion current density (Icorr) was 1.126 × 10–5 A·cm–2, the protection efficiency was 98.40%, and the charge transfer resistance (Rct) reached 696.1 Ω·cm2, indicating that the coating effectively prolonged the diffusion pathways of corrosive ions through.
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LANGMUIR
·
2025
·
IF 3.9
Mingwei Zhao,Xinyue Yang,Zhenfeng Ma,Ying Li,Xiangjuan Meng,Caili Dai,Yingnan Wang
In the process of spontaneous imbibition to enhance oil recovery (EOR) in low permeability reservoirs, nanoparticles have shown great potential due to their excellent properties. In this study, four novel amphiphilic carbon quantum dots (ACDs) were synthesized by the pyrolysis of citric acid and four long-chain primary amines. The results of high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) confirmed the successful synthesis of ACDs with an average particle size of 3.4 nm. The results show that the synthesized ACDs have excellent stability, interfacial rheology, and wettability reversal ability. In the spontaneous imbibition experiment, the recovery of the ACD solution was 22.10% higher than that of deionized water. In addition, the influencing factors in the imbibition process were studied in combination with nuclear magnetic resonance (NMR) results. Finally, it is considered that the imbibition process is related to the combined effect of small size, low interfacial tension, and the wettability reversal ability of ACDs. The developed ACDs provide a promising solution for spontaneous imbibition to the EOR, especially in low permeability reservoirs.
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IONICS
·
2025
·
IF 2.6
Dong Shiyu,Fan Yutong,Wang Fuhai,Shen Chunhui,Gao Shanjun
While ether-free anion exchange membranes (AEMs) have demonstrated enhanced alkaline stability, the simultaneous enhancement of hydroxide conductivity and dimensional stability remains a challenging aspect to address. This study proposes a reductive amination strategy for synthesizing cross-linked polyvinylpyrrolidone (PVP)-based AEMs. The strategy involves controlled molecular weight variation (K16, K30, and K60) and alkylamine functionalization. The employment of n-propylamine, 3-(Dimethylamino)propylamine (DMAPA), and hexadecylamine in conjunction with a 1,6-dibromohexane cross-linker has enabled the systematic tailoring of membrane architectures. The K16-PVP grafted with DMAPA demonstrated the highest grafting degree, as confirmed by FT-IR and 1 H NMR analyses, and exhibited enhanced cross-linking density. This synergy resulted in a significant improvement in ion transportation and mechanical stability. The optimized membrane performed exceptionally, with 94.15 mS·cm −1 of hydroxide conductivity at 80 °C, surpassing PVP-based AEM reports, while still maintaining 85.3% conductivity after 240 h in 2 M NaOH at 80 °C. These results establish molecular weight-controlled reductive amination as an effective approach to resolve the critical conductivity-stability trade-off in anion exchange membranes. Graphical
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Cui Ruopeng,Li Yi,Zhang Xuefei,Duan Zewen,Zhao Biao,Wan Chunlei
Integrating 2D (semi)metals and semiconductors into atomic-scale Schottky heterojunctions offers a promising pathway for achieving robust charge separation, crucial for microwave absorbers, electromagnetic interference shielding materials, electrocatalysts, photocatalysts, etc. However, conventional bottom-up assembly approaches often encounter challenges of severe agglomeration of 2D components and non-basal contacts due to lattice mismatch, resulting in a suboptimal interfacial density and insufficient charge separation. This study introduces a top-down approach involving the thermal deintercalation of graphene/alkylamine superlattices, leading to the in-situ formation of Schottky heterojunctions between the thermally reduced p-type rGO-alkylamine superlattice phase and entirely deintercalated semimetallic rGO phase (rGO denotes reduced graphene oxide), which can be flexibly tuned by the length of the alkylamines. A spatial network of 2D/2D vertical/lateral Schottky heterojunctions is thus formed with high interfacial density, greatly facilitating charge separation, and thereby strengthening polarization loss while reducing conduction loss. This ensures steady permittivity in the Ku band, maintaining strong absorption under small oblique incidence. Accordingly, a record-high simulated far-field bistatic radar cross-section reduction of 72.68 dB at 1° is attained along with diversified adaptive multifunctionality. This paper provides a groundbreaking avenue realizing spatially distributed atomic-scale 2D/2D Schottky heterojunctions in 2D materials, promoting various related functional materials.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Junyang Yin,Jie Zhang,Wen Pan,Zhenzi Wu,Feng Wu,Jiangnan Dai,Jiajun Luo,Changqing Chen
Ongoing research on perovskite quantum dots (PQDs) spanning diverse areas such as crystallography and biology represents a rapidly expanding frontier in nanotechnology, yet is still limited by the poor water stability and inadequate biocompatibility. Herein, this study reports an ultra-simplified, eco-friendly, cost-effective, and industrial-grade fully aqua-mediated ripening (FAMR) technique for aqueous-PQDs (APQDs) with tunable spectra, achieved by directly stirring the raw precursors with zwitterionic ligands in water at a set pH via Ostwald ripening crystallization.These APQDs exhibit high photoluminescence quantum yields (PLQYs) of up to 82.8% (blue), 98.2% (green), and 92.4% (red), respectively. Owing to the highly efficient bidentate binding of zwitterionic ligands onto APQDs surfaces, as confirmed by theoretical studies, the APQDs demonstrate excellent water storage stability for over 1 month and can retain an impressive 83% of the initial PL intensity after 3 months when transferred to EtOH. With elevated exciton binding energy, extended carrier lifetimes, and lower defect density, APQDs also outperform conventional oil-phase PQDs in terms of thermal and UV irradiation stability. Based on this, water-soluble fluorescent nanoparticles (NPs) are synthesized through self-assembly of APQDs and DSPE-PEG 2000 using EtOH and water as biphasic solvents. Finally, the APQDs@NPs, possessing desired luminescence and biocompatibility, exhibited excellent bioimaging performance in U251 cells.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Mingrui Liu,Guangmin Li,Shunsheng Wei,Hongfei Liu,Gaoling Yang
Chiral semiconductor nanocrystals (NCs) represent a promising class of materials for various applications, including biological sensing, photonics, and spin-polarized devices. However, the comprehension of the mechanisms underlying ligand-induced chiroptical effects in NCs has been limited by the constraints of current theoretical and experimental models, particularly those involving simple spherical NCs. In this study, we examined the relationship between optical activity and band structures in core–shell dot-in-rod NCs, specifically CdSe@CdS, ZnSe/CdS@CdS, and ZnSeTe/CdS@CdS dot-in-rod NCs, which were functionalized with chiral ligands. By manipulating the wave function distribution of electrons and holes within the dot-in-rod NCs, we demonstrated through circular dichroism (CD) measurements that a reduction in the number of holes within the synthesized dot-in-rod NCs correlates with a decrease in the g factor. This conclusion was corroborated by theoretical calculations. Furthermore, the fabrication of chiral CdS-Au heterojunctions and the application of electron quenchers revealed that the reduction of the g factor also suggests the significant role of electrons in the generation of chirality. Our findings not only enhance the understanding of the fundamental origins of induced chirality effects in semiconductor NCs but also provide a clear methodology for the design of optimal optically active chiral NCs, thereby paving the way for future applications utilizing chiroptical materials.
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