CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Wenjie Wang,Shan Ni,Yafeng Liu,Wang Yao,Yue Zhao,Jianrong Zeng,Huizhou Liu,Liangrong Yang
Uranium extraction is a promising technology for addressing global energy shortages and environmental challenges. However, the design and preparation of adsorbents with high performance is a bottleneck. In this study, a self-standing nanofiber network with phosphorylated ZIF-8 dispersion (PA/ZIF-8-CNC) is fabricated based on a mechanical shrinkage force induction strategy, which realizes synergistic structural and microenvironment regulation to achieve uranium adsorption. The assembled one-dimensional self-standing nanofibers could effectively expose more adsorption sites and offer structural integrity, thus enhancing both adsorption capacity and practical operability. Additionally, phytic acid (PA) modification can create the phosphoric acid-rich hydrophilic microenvironment, provide abundant specific sites and enhance mass transfer, thereby improving selectivity and adsorption kinetics. Consequently, the prepared PA/ZIF-8-CNC shows a high uranium adsorption capacity of 769.9 mg/g in 1 h and an antibacterial efficiency close to 100 %. Notably, the material demonstrates high selectivity, achieving an 88 % uranium removal rate in actual leaching tailings wastewater. This work proposes that the collaborative regulation of structure and microenvironment can be extended to the design of other materials to improve uranium separation performance.
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Materials Horizons
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2025
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IF 10.7
Huping YAN,Liangyu LI,Chuanshuai Dong,Hao Wu,Ronghui Qi
Ambient humidity is an abundant yet underexploited energy reservoir, and its sustained conversion mechanisms remain elusive. This study employed single-layer, bilayer and ion-selective designs, in combination with Kelvin-probe force microscopy and molecular-dynamics simulations, to delineate the fundamental physics of hydrogel-based moisture-enabled generators (MEGs). We demonstrate that continuous, directional water flux—rather than ion migration—governs electricity generation: the transport of 1 g of H₂O through the hydrogel network yields ≈ 7.6 µA h, and vapor-phase migration alone sustains output over hours to days. Interrupting water transport (e.g., via carbon-membrane insertion or device sealing) extinguishes the current instantly. Moreover, the open-circuit voltage scales with the internal surface-potential gradient: increasing this gradient from 31.3 mV to 810.7 mV elevates the output by 2.5 times. Guided by these findings, we introduced a co-optimization strategy that simultaneously enhances water transport and amplifies the potential gradient, thereby achieving a 30–50% increase in output performance (from 0.6 to 0.93V). Surface evaporation contributes solely by sustaining water flux, whereas triboelectric effects are negligible. This work establishes a quantitative mechanistic framework and delivers clear design principles for robust, high-efficiency MEGs, paving the way for self-powered sensors, portable electronics and distributed energy-harvesting platforms.
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高影响因子
Materials Horizons
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2025
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IF 10.7
Qianwen Chen,Yanbing Huang,Wanshun Duan,Qijia Su,Yilong Wang,Fuxi Bao,Junjun Zhang,Wen Guo
The kinetics of the oxygen evolution reaction (OER) of Co3O4 in alkaline media can be promoted by a bimetallic co-doping strategy. Herein, we synthesize a Zn/Fe co-doped Co3O4 nanostructure (ZnFe-Co3O4) to enhance the oxygen evolution reaction performance in the alkaline media. The ZnFe-Co3O4 electrocatalyst exhibits a low overpotentials of 255 mV at 10 mA cm-2, a Tafel slope of 54 mV dec-1 in 1.0 M KOH and excellent long-term durability up to 120 hours at 100 mA cm−2. The X-ray photoelectron spectroscopy (XPS) reveals that Zn occupies octahedral Co3+ sites and Fe occupies tetrahedral Co2+ sites in the Co3O4 lattice. The experimental results together with theory calculations collectively demonstrate that ZnFe-Co3O4 follows the lattice oxygen mechanism (LOM) during OER process. In situ Raman spectroscopy shows that the truly reactive FeOOH/CoOOH species are formed through surface reconstruction during OER. Furthermore, it is found that the synergistic effects of Zn and Fe doping, which stabilize the Co3O4 structure and promote the generation of active (oxy)hydroxide species, are identified as key factors in the enhanced electrocatalytic performance. This work offers a novel concept for enhancing the electrocatalytic activity of electrocatalysts through doping strategies and provides guidance for the rational design of ideal electrocatalyst.
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POLYMER DEGRADATION AND STABILITY
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2025
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IF 7.4
Chang Wang,Min Hu,Yanji Wu,Haiyun Ma,Jianzhong Xu
Biomass-derived cellulose aerogels have garnered significant attention in recent years due to their renewability and sustainability. Here, we introduce a completely biomass typha orientalis fibers (TOFs) based aerogel which possesses excellent flame retardancy and fire warning performance. Both cellulose and lignin were effectively preserved to maximize the utilization of the biomass TOFs during the pretreatment. The TOFs were then crosslinked with the biomass flame retardant ammonium phytate. The resulting TOFs based aerogel possesses a low density (48 mg/cm 3 ) and excellent thermal insulation properties. Meanwhile, robust flame retardancy was also achieved, its UL-94 rating easily reaches V-0 grade, with a limiting oxygen index (LOI) as high as 78 %. In addition, based on the stable phosphorus doping char structure during combustion, the TOFs based aerogel also shows fire warning performance. It can respond quickly upon flame and continue to trigger alarm for up to 1.5 h. Moreover, the resulting TOFs based aerogel demonstrates excellent reusability in fire early warning up to 30 times. The present full biomass-based aerogel not only provide a fire warning capability but also contribute to the suppression of flame spread, thereby enhancing the overall safety.
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ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Hao Li,Sen Xue,Qin Zhang,Feng Chen,Qiang Fu
Cellulose has the advantages of renewability and degradability, while cellulose’s rigid structure and hydrogen bonding limit its dissolution and application. Low-temperature alkali/urea solvents offer a green, low-cost solution but suffer from low solubility, high coagulation costs, and poor fiber strength. In this work, to address these problems, the high specific surface area and surface-rich hydroxyl groups of nano-SiO2 powders were used to modify the low-temperature alkali/urea solvent system. There are two alkali/urea solvent systems: LiOH/urea has better solubility but expensive and NaOH/urea is cheap but of less solubility. In the LiOH/urea system, it was found that the solubility of cellulose could be increased by 60.1% by addition of nano-SiO2 powder, and the gel temperature of the solution remained basically unchanged. By using the phytic acid coagulation system, the strength and elongation of regenerated cellulose fibers could reach 547.6 MPa and 18.7%, respectively. More importantly, in the low-cost NaOH/urea system, nano-SiO2 boosts solubility by 45.2%, regenerated cellulose fibers with 404 MPa strength, and 20.18% elongation by using the H2SO4/Na2SO4 coagulation system. Finally, the mechanism of action of nano-SiO2 is revealed, which provides a new idea for green dissolution and the high-performance regeneration of cellulose.
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PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Ying Hou,Yaru Sun,Bo Cheng,Chao Liu,Zhongjie Lyu,Yan Liu,Fenglei Huang
Traditional intumescent flame retardant (IFR), typically composed of 2–3 flame retardants, have been widely used. However, they tend to weaken the mechanical performance of polymer-matrix composite and have a time-consuming compounding process. Here, a novel three-in-one IFR was synthesized via a self-assembly strategy. The three-in-one IFR was designed in which the ratios of phytic acid, piperazine and melamine were 1:3:3, 1:4:2 and 1:5:1, respectively, and they were named as PPM-1, PPM-2, and PPM-3. Additionally, their effects on the flame retardancy and mechanical properties of polyurea (PUA) composites were systematically investigated. Although they have the same ingredients, their performances are vastly different. Among the PPM, PPM-2 was found to exhibit exceptional performance. When 25.0 wt% of PPM-2 nanoparticle was incorporated into PUA, significant reductions in peak heat release rate (67.2 %), total heat release (19.9 %), and total smoke production (42.9 %) were observed. The mechanisms behind different fire safety and mechanical performance have been revealed with variations of microscale morphology and chemical decomposition. This work presents a practical strategy for utilizing nano-particles in soft protective structures, which is also expected to significantly benefit the development of three-in-one IFR.
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Materials Chemistry Frontiers
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2025
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IF 6.4
Shi Wang,Huan Yang,Yukai Chen,Boyuan Hu,Peng Tian,Xiongbiao Xue,Yong Wang,Yu Li,Xinli Jing
Conducting polymer (CP) hydrogels that possess electronic and ionic conducting behaviors have attracted increasing attention as flexible electronic materials. Due to the insoluble and infusible nature of CPs (e.g., polyaniline (PANI), polypyrrole (PPy), etc.), the performance of their hydrogels is typically restricted, especially when the hydrogel was constructed through the in situ polymerization of aniline or pyrrole monomers. In this study, a method to prepare robust and highly conducting hydrogels at a large scale was developed with highly conducting PPy nanotubes (PPy NTs) and an interpenetrating network (IPN) of polyacrylic acid (PAA) and polyvinyl alcohol (PVA). The PVA/PAA IPN contains covalent cross-linking points, ionic coordination, and hydrogen bonding sites. This structure endows the hydrogel with excellent strength and toughness and provides effective stabilization for PPy NTs. The obtained PPyNT/PAA/PVA hydrogels exhibit tensile strengths higher than 4.0 MPa, and the conductivity reached 5.3 S m−1 with a PPy NT content of 0.63 wt%. As the PPy NTs effectively bonded with the hydrogel matrix network, the PPyNT/PAA/PVA hydrogels exhibit a linear relationship of conductivity change vs. strain in a wide strain range of 0–500%, with a steady gauge factor (GF) of ca. 1.38. Benefiting from preparation feasibility, the variation trends of hydrogel conductivity, deformation ability, and sensing properties were systematically studied, providing a reference for high-performance strain sensor materials.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2025
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IF 14.3
Bo Cheng,Yaru Sun,Wenyuan Zhang,Wenchao Zhang,Dinghua Li,Rongjie Yang
The heat accumulation caused by the high-power consumption of continuously upgrading electronic devices puts forward more requirements for efficient heat dissipation and fire safety of insulating materials. Herein, a bio-based flame retardant functionalized boron nitride nanosheet (BNNS@PP-Fe) was prepared via a simple mechanical exfoliation and self-assembly technology for reduction in the fire hazards of ethylene-vinyl acetate copolymer (EVA), as well as the improvement of its thermal conductive and mechanical performances. Arising from the highly flat oriented structure and rich flame-retardant functional groups of BNNS@PP-Fe, as well as the high compatibility between filler and matrix, the EVA/ATH/4BNNS@PP-Fe composites exhibited high thermal conductivity (0.78 W/(m K)) and outstanding flame retardancy with a dramatic decrease in peak heat release rate (p-HRR, 135.2 kW/m 2 ) and total heat release rate (THR, 60.3 MJ/m 2 ). Compared to neat EVA, the p-HRR and THR values of EVA/ATH/4BNNS@PP-Fe composite significantly decreased by 76.5% and 47.3%, respectively. Additionally, the flat-oriented structure and strong interfacial interaction also endow EVA/ATH/4BNNS@PP-Fe composites with excellent mechanical properties. This work provides a facile pathway to fabricate multifunctional BNNS and will promote the development of commercial insulating materials, not just EVA.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Jiaxing Huang,Jiapeng Zhong,Ruipu Yao,Xiaojun Zhong,Qiao Xue,Xiaolong Yu,Qianwei Liang,Ke Zhong,Ningyu Tu,Jianteng Sun
An efficient photocatalyst was constructed via a simple single-stage thermal condensation reaction and applied to photoinduced peroxymonosulfate (PMS) activation for naproxen (NPX) degradation. Batch experiments demonstrated that phosphorus (P)–iron (Fe)-codoped g-C 3 N 4 (PFeCN) exhibited superior catalytic performance compared to previously reported catalysts, achieving 97 % NPX degradation within 20 min and a reaction rate constant approximately tenfold higher than that of pristine g-C 3 N 4 . P Fe codoping increased active site exposure, improved charge carrier separation efficiency, and enhanced light absorption capacity. Specifically, P N sites served as adsorption and activation centers for PMS, while Fe doping alleviated the reduction in specific surface area caused by P doping and further enhanced photoelectrochemical properties. Radical species analysis confirmed superoxide radicals as the dominant reactive species. The degradation pathways and toxicity evolution of NPX were also investigated, providing critical insights for environmental risk assessment. Furthermore, PFeCN maintained robust catalytic performance under various environmental conditions and after multiple cycles, indicating strong application prospects. This study offers key perspectives on the rational design of heteroatom-doped photocatalysts through atomic-level engineering for efficient photoinduced PMS activation.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2025
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IF 6.2
Enwen Liu,Maiquan Chen,Yijuan Chang,Haiqiao Zhang,Zhihui Wu
This study introduces an innovative methodology for the development of sustainable, high-performance building insulation materials via molecular engineering of Cellulose nanofibers/Polybenzoxazine-Polyvinyl alcohol (CNFs/PBZ-PVA) composite foams modified with environmentally friendly protonated Poly(ethyleneimine)-Phytic acid (PEI (H⁺)-PA) ligand. The use of renewable bio-based components and eco-friendly modification processes underscores the material's alignment with circular economy principles. The optimized formulation, characterized by a 2: 1 CNFs/PEI (H⁺)-PA ratio, exhibits exceptional multifunctional properties, including a uniform microporous structure (15–35 μm), remarkable compressive strength (2.77 MPa at 80 % strain), and superior thermal insulation performance (0.0504 W/(m·K)). In addition, the integrated P-N synergistic system substantially enhances flame-retardancy (LOI=37.2 %, UL-94 V-0 rating), achieving reductions in heat release and smoke production by 41.67–81.43 %. Subsequent silane modification further elevates hydrophobicity (contact angle of 114.5°) and fire safety (LOI=39.1 %, 82.74 % reduction in PHRR). The fabricated wood-based insulation panel demonstrates outstanding thermal resistance (surface temperature of 52.8 °C after exposure to 120 °C for 180 s), surpassing the performance of conventional commercial products. This research offers a green materials solution that effectively integrates thermal management, mechanical durability, and fire safety for sustainable building applications.
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INDUSTRIAL CROPS AND PRODUCTS
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2025
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IF 6.2
Gang Tang,Cunlong Fu,Xuhao Zhen,Mengfan Guan,Xin Wang,Dan Deng,Xiuyu Liu
Wood materials have been basic building and structural materials for thousands of years, but because of their particular composition, the flammability and flame retardant modification of wood composites have attracted widespread attention. In this study, a new strategy was designed for flame retardant modification of commercial wood boards, and a series of wood samples were prepared with improved hydrophobic and flame retardant properties via delignification, impregnation of phytic acid (PA) and 3, 5-diamino-1,2,4-triazole (ATA-N), and surface hydrophobic modification of trimethoxymethylsilane. After impregnation with PA and ATA-N, the wood samples exhibited outstanding flame retardant properties, and the Wood@PA/ATA-N sample presented a limit oxygen index (LOI) of more than 80 % and a UL-94 V-0 rating. In addition, the peak heat release rate (PHRR), total heat release (THR) and total smoke production (TSP) of Wood@PA were 92.0 %, 68.0 % and 63.0 % lower than those of the untreated wood. Moreover, surface treatment with organosilane significantly improved the hydrophobicity of the wood surface, and the water contact angle of the surface for Wood@PA/ATA-N/MTMS reached 93.4°, indicating a highly hydrophobicity. In conclusion, the strategies of delignification, flame retardant impregnation and surface modification could significantly improve the flame retardancy and hydrophobic properties of wood samples, thereby increasing their useful life and application value in construction and structural materials.
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CELLULOSE
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2025
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IF 4.8
Zhao Feiyang,Liu Huijuan,Jin Yilin,Ru Hongfu,Wang Longfei,Xiang Shuangfei,Li Hao,Zhao Shujun,Fu Feiya,Camilleri Ing. Duncan,Liu Xiangdong
The application range of rice straw (RS) is limited by its poor flame and water resistance. It’s still a great challenge to endow RS fibers with excellent flame and water resistance properties without compromising the intrinsic mechanical properties. Here, a simple surface treatment strategy of RS fibers via co-treatment with phytic acid (PA) and calcium chloride (CaCl 2 ) was developed. First, PA was grafted onto RS fibers by esterification reaction. Then RS fibers were ionically crosslinked by CaCl 2 treatment. Modified RS fibers (PCRS) were then mixed with unsaturated polyester resin (UPR) to produce PCRS/UPR composites (PCRU). Benefiting from Ca 2+ complexes via the ionic crosslinking between Ca 2+ and –P (=O)–OH of the PA, –OH of the RS fibers, PCRU demonstrates enhanced tensile strength (12.04 MPa), good waterproofing capability, and flame-retardant performance. PCRU exhibites low water absorption rate (5.90%) and dimensional stability (thickness deformation less than 1.76%) after 168 h of water immersion. In addition, the limiting oxygen index and the total heat release of the prepared PCRU composites are 29.7 and 11.3 kJ/g, which reach the standard for flame retardant materials. Therefore, this study provides a simple and green pretreatment strategy of rice straw fiber for the applications in flame retardant, low water absorption, and dimensionally stable composites. Graphical
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