Surfaces and Interfaces
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2026
·
IF 6
Run-Chao Zheng,Hao Li,You-Lin Zhang,Long-Hui Zhu,Zhao-Xu Chen,Lian-Kui Wu,Fa-He Cao
A polydopamine-functionalized graphene oxide (GO-PDA) nanofiller was synthesized through a one-step self-polymerization process and incorporated into a polyurea (PU) matrix to modulate nanosheet defect states, interfacial chemistry, and macroscopic coating performance. PDA deposition effectively reduces the density of oxygen-related defects on GO, enhances π–π conjugation within the carbon framework, and introduces amine-bearing functionalities capable of forming covalent and hydrogen-bond interactions with isocyanate-derived segments in PU. These molecular-level modifications suppress nanosheet aggregation and promote homogeneous dispersion, yielding a compact hybrid network with strengthened filler–matrix adhesion. The GO-PDA/PU coating exhibits markedly improved mechanical robustness, including an adhesion strength of 16.50 MPa, a tensile strength of 44.6 MPa, and reduced wear-induced mass loss. Furthermore, nanoscale defect passivation and the formation of tortuous diffusion pathways regulate transport pathways and barrier integrity, enabling the coating to maintain impedance values above 10¹¹ Ω·cm² after 150 days of NaCl immersion and remain structurally intact after 3100 h of neutral salt-spray exposure. These findings demonstrate that tailoring GO defect chemistry and polymer–filler interfacial interactions via PDA provides an effective strategy for constructing polyurea-based nanocomposite coatings through interfacial defect modulation and transport-path regulation, enabling sustained physicochemical stability.
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INDUSTRIAL CROPS AND PRODUCTS
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2026
·
IF 6.4
Min Wu,Lin Wang,Ren Zhang,Zhiyu Zhang,Mang Wu,Youhong Wang,Liang Zhou
Although small-diameter bamboo represents a renewable biomass resource with high accessibility, systematic investigations into the molecular architecture of its lignin constituents remain limited. In this study, DES and ball-milling methods were employed to extract lignin from small-diameter bamboo and Moso bamboo, and the lignin structures obtained via these two methods were analyzed and characterized. The results show that the DES for extracting lignin is significantly more efficient than ball-milling. DES can promote the cleavage of the β-O-4 bonds in lignin, and subsequently, the lignin undergoes a condensation reaction, thereby increasing the phenolic hydroxyl group content and elevating the S/G ratio. For instance, in comparison with ML- Bm , DL- Bm exhibits a significantly reduced β- O -4 content of only 12.7%, while the phenolic hydroxyl group content reaches a high value of 6.23 mmol/g and the S/G ratio increases from 1.3 to 2.4. Furthermore, DES-extracted lignin exhibited enhanced molecular weight accompanied by an increased polydispersity index (Đ). The molecular weight of lignin exerts a more pronounced influence on the T g than does the hydroxyl group content. This work is of great significance for optimizing the lignin extraction process and its functional utilization, providing technical support for the upgrading of the bamboo industry and the development of the biomass economy.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Zijian Chen,Huiling Guo,Yao Chen,Xinyue Yang,Cheng Liu,Huajun Sun
Semiconductor photocatalysis faces critical challenges, including limited visible-light absorption and rapid charge recombination. Overcoming these bottlenecks is essential for its environmental and energy applications. In this work, a MoS 2 /HCN S–scheme heterojunction was constructed by integrating protonated C 3 N 5 with MoS 2 nanosheets. This architecture was specifically engineered to establish a synergistic piezo-photocatalytic effect by leveraging the intrinsic asymmetry of the N-rich C 3 N 5 framework. Under simultaneous solar and ultrasonic irradiation, the MoS 2 /HCN heterojunction achieved a remarkable 99% degradation of tetracycline hydrochloride within only 15 min. The degradation rate constant reached 0.249 min −1 , representing a 22.6-fold enhancement compared to the 0.011 min⁻ 1 observed for pristine C 3 N 5 . Furthermore, the composite delivered a superior hydrogen evolution rate of 14.83 mmol g -1 h −1 . Mechanistic analysis, supported by in-situ characterizations, confirms that the internal piezoelectric field effectively drives directional carrier separation and significantly boosts surface redox kinetics. This study demonstrates a promising strategy for harnessing multiple environmental energy sources through advanced interface engineering, providing a practical blueprint for integrated pollution remediation and green energy conversion.
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Horticultural Plant Journal
·
2026
·
IF 7.1
Yongquan Liu,Lu Jiang,Ahui Xue,Qifang Sun,Yingbin Hao,Meng Cui,Liping Luo
Citrus huanglongbing arises primarily due to Candidatus Liberibacter asiaticus ( C Las), transmitted by Asian citrus psyllids (ACP). To investigate the defense mechanisms of citrus against ACP feeding mediated by C Las, we investigated the metabolomic and transcriptomic variations in navel orange subjected to feeding by either ACP C Las-infected (ACP+) or -noninfected (ACP−) Asian citrus psyllids. This resulted in the establishment of the following groups: ACP+24 h, ACP+72 h, ACP−24 h, ACP−72 h, and control groups, respectively. The results indicated that both C Las and ACP influenced the release of volatile organic compounds, flavonoid biosynthesis, salicylic acid (SA)-jasmonic acid (JA) signaling pathway, and photosynthesis in citrus. Specifically, the levels of 3-carene, linalool, methyl salicylate, and citronellol were increased at ACP+24 h, exhibiting attraction effect on ACP−, while acting as a repellent to ACP+, which may promote the spread of C Las. Genes CsDXS3, CsADH, and CsADH3 probably contributed to in geraniol degradation. SA signaling was activated, upregulating the genes of nonexpressor of pathogenesis-related and pathogenesis-related proteins in systemic acquired resistance. However, downregulation of CsAOS , CsAOC , CsJAR1 , and CsJAZ corresponded with decreasing trend in compounds related to α-linolenic acid metabolic, indicating the SA-JA antagonism. These findings offer novel insights into C Las involvement in citrus initial responses to ACP feeding, contributing to understanding of citrus- C Las-ACP interactions.
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Polymer Chemistry
·
2026
·
IF 3.9
Bole Chen,Xinyang Zhao,Yifan Liu,Xiangqi Xu,Luran Chun,Zhouju Zhong,Jun Nie,Jingfang Li
Achieving thick coatings (>200 μm) remains a significant challenge in the field of photopolymerization, primarily due to light attenuation. Despite the use of photobleaching initiators, rapid polymerization frequently results in the formation of a crosslinking gradient and the development of internal stresses, which adversely affect the mechanical properties, particularly the toughness, of the photo-cured materials. In this study, a novel macrocyclic photobleaching initiator [2](BPC)[2](C12) was developed specifically for thick-coating photopolymerization applications. In contrast to the photobleaching mechanism associated with the commercial initiator TPO, [2](BPC)[2](C12) exhibits a deeper color, which reduces light penetration and significantly decelerates the photobleaching rate, thereby generating a distinctive light-gating effect. This effect modulates the polymerization kinetics by inhibiting premature surface gelation and mitigating both the crosslinking density gradient and internal stress. As a result, the curing process is optimized in terms of uniformity, while maintaining a high degree of monomer crosslinking. To further elucidate the underlying mechanisms, this study employs density functional theory (DFT) calculations, steady-state photolysis, and in situ nuclear magnetic resonance (NMR) analysis, providing detailed insight into the photobleaching behavior and progressive curing mechanism of [2](BPC)[2](C12) in the presence of an EDB system. The findings from compression tests demonstrate that this progressive curing strategy significantly enhances the mechanical toughness of thick coatings. Specifically, for cylindrical poly(TMPTA) specimens (1 cm in diameter × 1 cm in height), the strain energy density increased from 0.6415 MPa to 0.9207 MPa, reflecting a 43.5% improvement. Moreover, the maximum strain exhibited a substantial increase, from 33% to 77%. This research not only introduces a new molecular platform for photopolymerization but also provides critical mechanistic insights that will aid in the rational design of high-performance photocuring systems for thick coatings.
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WATER RESEARCH
·
2026
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IF 12.8
Ping Zhang,Chenchen Zhao,Fei Jiang,Chuyang Wu,Tianqi Wang,Xing Xu,Mengjie Wu,Zhanli Chen,Youqin Zou
Green Fenton-like reactions based on monometallic single-atom dual-reaction-center systems have emerged as promising strategies for sustainable water purification owing to their oxidant-free operation and low energy demand. However, their practical deployment is often hindered by limited degradation kinetics and unresolved mechanisms. Here, we report a carbon nitride-supported Fe/Mn bimetallic catalyst composed of Fe nanoclusters and adjacent Mn single atoms (FeMn-CN) that enables ultrafast and self-sustaining pollutant degradation under oxidant-free conditions. The catalyst achieves 99.5% removal of bisphenol A (BPA) within 3 min, setting an ultrahigh rate to date among self-sustaining water purification systems. Combined experimental investigations and density functional theory calculations reveal that the reaction proceeds predominantly via a direct electron-transfer pathway. Fe nanoclusters serve as primary electron acceptors, extracting electrons from BPA without external oxidants, while adjacent Mn single atoms coordinated in Mn-N 4 sites synergistically enhance the electron-accepting capacity of Fe and substantially lower the charge-transfer energy barrier. This atomic-level cooperation endows FeMn-CN with exceptional activity across a broad pH range (pH 2-10), strong tolerance to complex water matrices, high selectivity toward electron-rich contaminants and facile regeneration. Furthermore, continuous-flow reactor tests and life-cycle assessment collectively verify the scalability and superior environmental sustainability of the FeMn-CN process. This work establishes an atomic-level design principle for electron-transfer-dominated self-sustaining remediation materials, advancing the development of next-generation oxidant-free water purification technologies.
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RSC Advances
·
2026
·Vol. 16
·期 14
·12524-12536
·
IF 6.1
Zhaopeng Sun,Yaling Wu,Yingying Chen,Zhibo Li,Sen Lei,Yongyong Cao,Lianwen Zhu,Xuebo Cao,Zheng Yan
Previous studies have often focused on optimizing electrocatalytic performance by altering the type of metal centers or the morphological structure of catalysts to modulate their electronic structures and active sites. However, the precise regulation of metal valence states to enhance catalytic performance—particularly for trifunctional electrocatalysis in the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER)—remains in the exploratory stage. In this study, crystalline Co–N6 materials with controllable valence states were carefully selected as precursors. Through carbonization, Co–N–C materials with similar carbon frameworks but distinct metal valence states (Co2+ and Co3+) were successfully prepared. Both experimental tests and theoretical calculations demonstrate the superior trifunctional electrocatalytic performance of Co2+–N–C. Density functional theory (DFT) calculations provide evidence for the more favorable intermediate adsorption energies and lower reaction energy barriers exhibited by Co2+–N–C. This performance advantage stems from the 3d7 electronic configuration of Co2+, which optimizes electron cloud density and strengthens Co–N bonding interactions. This work presents a new strategy for designing highly efficient electrocatalysts by elucidating the regulatory role of metal valence states.
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RENEWABLE ENERGY
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2026
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IF 9.1
Sicong Tan,Qian Feng,Jiarui Lu,Junfeng Wang,Zhaoyang Xu
The increasing global demand for renewable and sustainable energy has driven growing interest in hydrovoltaic energy generators (HEGs), which harvest electricity from naturally occurring water without relying on extensive infrastructure. Wood, with its anisotropic and hierarchical porous architecture, provides efficient pathways for water transport and ion migration, making it an attractive and sustainable platform for HEG applications. However, conventional wood-based evaporation-driven generators predominantly rely on streaming-potential effects arising from microscale fluid flow, while the contribution of surface-charge regulation and nanoscale transport within the wood cell walls remains limited. In this study, 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidation is employed to increase the density of carboxyl functional groups and, upon sufficiently prolonged oxidation, induce the formation of nanoscale pores within the wood cell walls, thereby strengthening interfacial charge interactions and facilitating ion transport under evaporation-driven water flow. As a result, the optimized TEMPO-treated wood (TW) delivers a maximum open-circuit voltage of 303.6 mV with a corresponding power density of 0.34 μW cm −2 . These results highlight the effectiveness of cell-wall-level chemical and structural engineering in enhancing hydrovoltaic performance, providing new insights for the development of scalable and sustainable wood-based energy harvesting systems.
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Journal of Materials Chemistry A
·
2026
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IF 9.2
Chen Wang,Maoning Xu,Quanqi Yang,Ye Li,Wanjing Jia,Zhengwen Han,Jianjun Wang
UiO-66 exhibits exceptional stability compared to other metal-organic frameworks (MOFs), while its amino-functionalization enhances photocatalytic performance. Similarly, covalent organic frameworks (COFs) like the cyano-containing HDU-105 serve as ideal photocatalytic platforms due to their optoelectronic properties and ability to improve charge separation. In this study, we designed a series of core-shell structured UiO-66-NH2@HDU-105 heterojunctions for the efficient photocatalytic reduction of hexavalent chromium (Cr(VI)). We systematically investigated the optimal combination ratio, finding that a MOF@COF mass ratio of 2:1 achieved a maximum reduction efficiency exceeding 99 %, significantly outperforming individual UiO-66-NH2 (31 %) and HDU-105 (36 %). Mechanistic studies revealed that the composite operates via a Z-scheme charge transfer pathway, electrons transfer from the conduction band of UiO-66-NH2 to the valence band of HDU-105, while h⁺ accumulates in the UiO-66-NH2 region. Under acidic conditions, electrons attached to HDU-105 can directly reduce Cr(VI) to Cr(III). Furthermore, the UiO-66-NH2@HDU-105 composite demonstrated excellent selectivity and long-term stability in both laboratory settings and real water matrices (groundwater and surface water). Ultimately, this study presents a viable design strategy for developing efficient and robust photocatalysts for heavy metal remediation.
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BIOMASS & BIOENERGY
·
2026
·
IF 7
Lihang Yang,Yutao Wang,Mingfeng Chen,Dehao Li,Feng Wang,Liyuan Zhang,Yu Liang,Renjie Chen,Jun Li
To tackle UAV on-board electronics’ key pain points—single functionality, excessive weight, and poor thermal-electromagnetic integration—a sustainable multifunctional composite phase change aerogel (C-PCA) was developed via a dual biomass synergy: waste paper (WP) builds a macro load-bearing framework, while spent coffee grounds (SCG)-derived cellulose nanofibers (CNF) enable nanoscale cross-linking to jointly enhance structural stability. The fabrication involves three concise steps: directional freezing-freeze-drying to form CNF/WP aerogel, carbonization (700 °C, N 2 atmosphere) to obtain a porous carbonized aerogel (C-aerogel), and vacuum impregnation of PEG-1000 to prepare C-PCA. The optimal C-aerogel (Sample S1, WP/CNF mass ratio = 8:2) withstands a 200 g load without deformation; C-PCA retains a melting enthalpy of 130.2 J g −1 (91.8% of pure PEG-1000), reduces supercooling by 1.4 °C, and shows no leakage after heating at 60 °C for 120 min. Its thermal conductivity (351.4 mW m −1 K −1 , 1.5 times that of pure PEG-1000) ensures efficient heat transfer, while it reaches the phase transition temperature in 121 s under 1600 mW cm −2 simulated solar irradiation and 85 °C in 540 s under 15 V (UAV-adapted voltage). In the X-band (8.2–12.4 GHz), C-PCA achieves 33.98 dB electromagnetic interference (EMI) shielding (absorption-dominated, meeting UAV standards) and excellent infrared camouflage (surface temperature 23.1 °C, close to ambient 22.6 °C). This work realizes high-value utilization of waste biomass, providing a low-cost, eco-friendly solution for UAV on-board electronic systems.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Hongxu Su,Shijie Liu,Sicheng Geng,Xu Xu,Xiao Wang,Qiong Gao,Mingyi Zhang,Xinzhi Ma,Lin Li
Electronic modulation in quantum-size catalysts plays a critical yet underexplored role in governing the hydrogen evolution reaction (HER) in anion-exchange membrane water electrolyzers (AEMWEs). Here, cobalt nanoparticles with tunable diameters (5–15 nm) encapsulated in nitrogen-doped carbon nanotubes (Co@NCNTs) were engineered to elucidate how size-dependent orbital evolution dictates HER activity in alkaline media. We found that a smaller particle diameter results in a better charge transfer capability. Besides, the in-situ Raman spectroscopy shows that Co@NCNTs with an optimized diameter preserve a stable Co–N–C vibration at 690 cm −1 throughout HER, while transiently forming surface C–OH species—key intermediates that promote water dissociation. Inverse and ultraviolet photoelectron spectroscopy (IPES/UPS) further reveal that the quantum-size-effect splits the d -band and gives rise to a stronger Co 3 d –O 2 p hybridization. This enhanced hybridization facilitates electronic delocalization across Co–N–C/O interfaces, enabling dynamic charge transfer that favors the formation and subsequent reduction of C–OH intermediates during HER. As a result, the optimized Co@NCNTs catalyst achieves an overpotential of only 33 mV at 10 mA cm −2 and delivers 550 h operational stability in a full AEMWE. These findings provide direct experimental evidence that quantum-size-tailored orbital coupling governs interfacial OH/H 2 , thereby linking spectroscopic insight with catalytic function and establishing a rational design principle for high-performance non-noble-metal catalysts.
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IEEE SENSORS JOURNAL
·
2026
·
IF 4.5
Pengxia Li,Zhifei Cao,Bin Xie,Guowei Yang,Yifei Ma,Mei Wang,Suotang Jia,Xuyuan Chen,Zhaomin Tong
Gas sensors play a vital role in human health monitoring, particularly for detecting disease-related biomarkers in exhaled breath. However, conventional metal-oxide semiconductor gas sensors face limitations in wearable respiratory monitoring applications due to their inflexibility and high heat loss. Here, we fabricated an Au-ZnO fibre-based gas sensor for the detection of ammonia (NH3), an indicator of kidney dysfunction. The device is constructed from a composite flexible fibre comprising a liquid-metal core and a silica cladding, onto which an Au-ZnO gas-sensing layer is synthesised in situ. Liquid metal directly conducts thermal energy to the insulating cladding through Joule heating, providing thermal energy to the gas-sensing layer. This design enables low heat loss and low-current operation while generating sufficient thermal energy to enhance the gas-sensing response. The resulting Au-ZnO fibre sensor exhibits a stable high response to NH3 (response of 2.2 to 2 ppm NH3) even under bending (bending radius of 15 mm). The response time and recovery time are 153 s and 156 s at a working temperature of 280 oC. This demonstrates that the Au-ZnO fibre sensor has good flexibility and suitability for wearable respiratory monitoring. To showcase its practical utility, a real-time monitoring sensor system was developed by designing a signal detection circuit, and the concentration of NH3 was monitored in real time through different coloured light-emitting diodes. This work presents a practical, home-based approach for respiratory monitoring of NH3 and offers a simple, effective solution to distinguish between healthy individuals and patients with different stages of kidney disease.
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