RSC Advances
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2026
·Vol. 16
·期 14
·12524-12536
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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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KEY ENGINEERING MATERIALS
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2026
·
IF 0
Dale Vert Zimon G. Manansala,Jem Valerie D. Perez,Isaac Jerome C. Dela Cruz
This investigation reports the successful synthesis and characterization of a co-crystal composed of paracetamol (PCM) and metal sulfates of zinc and iron using an adapted antisolvent addition technique which leveraged the antagonistic solvent affinities of PCM and the metal sulfates. Ethanol and water acted as solvents for PCM and the metal sulfates, respectively, while simultaneously serving as antisolvents for the other constituent. Scanning Electron Microscopy (SEM) micrographs revealed crystals exhibiting a rod-like structure and a surface covered by flakes, which are both characteristic features of PCM and zinc sulfate, suggesting the formation of a new crystalline phase. This is further supported by the distinct powder x-ray diffraction pattern for the co-crystal when compared with that of the individual constituents. Analysis of Fourier Transform Infrared (FTIR) spectra suggests that the interacting functional groups which formed a new hydrogen bond network are the amide N-H and the water in the aquo complex formed by the metals in aqueous solutions. The findings highlight the simplicity of the crystallization technique and provide insights into the structural and mechanistic aspects of organic-inorganic co-crystals. This study contributes to the advancement of co-crystal engineering and lays the groundwork for exploring the pharmaceutical and functional applications of PCM-metal sulfate co-crystals.
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ADVANCED MATERIALS
·
2026
·
IF 29.1
Dan Wang,Chongbo Liu,Hualong Peng,Ruizhe Hu,Qi Zheng,Haoran Huang,Fang Zhao,Yuhui Peng,Maosheng Cao
Electromagnetic wave absorption (EMWA) materials with tunable responses are critically important for operation in complex electromagnetic environments. In this study, a novel dual-ion co-modulation strategy is introduced to overcome the limited controllability of conventional EMWA materials. By employing a coordination-mediated gelation phase transformation approach, a series of transition metal sulfide/sulfur–nitrogen co-doped carbon (M x S y /SNC, M = Fe, Co, Ni, or Cu) aerogels are successfully fabricated. First-principles calculations demonstrate that N,S co-doping tunes the electronic structure of the carbon matrix, enhancing local charge imbalance and promoting dipole polarization, which significantly broadens the EMWA band. At 1.65 mm, the effective absorption bandwidth almost covers the entire Ku band. Furthermore, cation-induced modulation of the electronic configuration enables precise tuning of the built-in electric field and dielectric response, resulting in customizable absorption peaks and bandwidths. All samples achieve a minimum reflection loss ( RL min ) below −60 dB, with the RL min peak frequency shifting from 17.44 GHz to 11.6, 9.84, and 5.12 GHz depending on the metal ion. Finally, a low-frequency antenna and a one-to-two power divider are constructed, demonstrating strong application potential in the communications field. This study provides a new pathway for designing high-performance, programmable EMWA systems and multifunctional materials.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2026
·
IF 6.6
Wei Dai,Tao Guo,Chunxia Liu,Kai Sun,Daoyue Xie,Youbin Si
Endocrine-disrupting estrogens, such as 17 β -estradiol (E2) and bisphenol A (BPA), are commonly found in agroecosystems, posing substantial risks to crop productivity and public health. While laccase-induced polymerization transfer is an effective strategy for estrogen remediation, the interactive effects of living crop root-released exudates ( e.g. , sugars, phenolic acids, amino acids) on this enzymatic process remain largely unclear. Here, we employed artificial root exudates (AREs) containing environmentally relevant concentrations of key components to systematically dissect the regulatory roles of distinct root-exuded fractions in laccase-induced estrogen conversion. Compared to the ARE-deficient group, phenolic and amino acids in AREs collectively suppressed laccase-induced estrogen self-polymerization. Notably, phenolic acids exerted a distinct, complementary effect by mediating radical-controlled C−C and C−O−C co-polymerization between estrogen molecules and ARE components, resulting in robust precipitation of co-polymeric products. These precipitation co-polymers were assembled from moieties containing phenolic −OH, −COOH, and aryl functional moieties, exhibiting high structural complexity, morphological diversity, and dense packing that endow them with unique physicochemical properties. Furthermore, we selected maize ( Zea mays L.) as a model crop and experimentally demonstrated that laccase reduced the estrogen pollution risks in maize seedlings by catalyzing rapid pollutant polymerization in the rhizosphere solution, effectively blocking root uptake and subsequent translocation to above-ground shoot tissues. Relative to the laccase-free group, laccase treatment significantly reduced E2 levels in maize roots and shoots by 59.26% and 54.78%, respectively, following 5-day exposure to 20 μmol·L⁻¹ E2. These findings offer a robust enzyme-induced polymerization way for mitigating estrogen pollution in agroecosystems, with critical implications for ensuring crop safety and agricultural sustainability.
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NEW JOURNAL OF CHEMISTRY
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2026
·
IF 2.5
Xianshu Zheng,Rui Piao,Xueqin Wang,Peng Qiao,Xin Guo,Meiru Zheng,Yanxiu Liu,Yuanyuan Wang,Hua Song,Yanguang Chen,Fuping Feng
In this study, TiO2 nanotubes were synthesized through anodic oxidation and subsequently coated with Ag and Cu2O nanoparticles via a two-step photochemical deposition process. The photocatalytic performance of the samples was further analyzed by the photocatalytic hydrogen evolution and photodegradation of Rhodamine B. The Ag/Cu2O/TiO2 nanotubes (4.34 at% of Ag and 0.13 at% of Cu) showed optimal photocatalytic performance. The nanocomposite catalyst delivered a photoinduced current density of 0.335 mA cm−2 and achieved 96.7% RhB degradation within 120 minutes of the reaction. The theoretical hydrogen production rate was 5.06 µmol cm−2 h−1, showing a 1.9-fold enhancement over that of pure TiO2. Electrochemical impedance spectroscopy and LSV tests further revealed that the Ag/Cu2O/TiO2 nanotubes exhibited improved charge transfer properties and hydrogen evolution activity. The performance is ascribed to the built-in p–n heterojunction between Cu2O and TiO2 that promotes carrier separation, further amplified by the intense local electromagnetic field generated through the LSPR effect of Ag, which collectively accelerates both photocatalytic degradation and hydrogen production rate over the Ag/Cu2O/TiO2 nanotubes. The methodology developed herein offers a practical guide for constructing novel multifunctional photocatalysts with controlled heterojunctions for diverse applications.
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Mineral Processing and Extractive Metallurgy Review
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2016
·
IF 1.56
Zijian Su,Yuanbo Zhang,Bingbing Liu,Jun Chen,Guanghui Li,Tao Jiang
Calcite (CaCO3), one of the main impurities, has an uncertain effect on the volatilization behavior of tin oxide in the tin-bearing iron ore concentrates during the selective reduction volatilization process. In this study, natural calcite powders were added into the tin-bearing iron ore concentrates to investigate tin volatilization behavior affected by CaCO3 under different roasting temperature, CO content, and roasting time. In addition, the effect of CaCO3 on the phase transformation of SnO2 was determined using XRD, SEM-EDS combined with thermodynamics calculation. The results indicated that CaCO3 had a significantly adverse effect on the Sn volatilization ratio, because Ca2SnO4 was easily formed under CO-CO2 atmosphere. It was also found from the study that the generation of SnO(s) was the most critical intermediate for promoting the formation of Ca2SnO4.
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JOURNAL OF NON-CRYSTALLINE SOLIDS
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2017
·
IF 2.124
X.L. Yang,W.C. Wang,Q.Y. Zhang
The influence of BaF 2 on the physical and spectroscopic properties of Cr 3+ /Ho 3+ co-doped germanate glass is investigated systematically by differential scanning calorimeter , excitation and emission spectra , as well as dynamic decay lifetime. The intense and broad absorption band of Cr 3+ provides a selective pump scheme for obtaining an efficient 2.0 μm emission of Ho 3+ , the OH − absorption coefficient, on the other hand, is decreased as low as 1.08 cm −1 , which both highly conducive to obtain an intense 2.0 μm emission of Ho 3+ . In addition, the crystal-field parameter D q / B of Cr 3+ -doped glasses is also calculated to study the influence of BaF 2 on the local environment of activators and sensitizers. Further theoretic calculation shows that the largest absorption and emission cross-sections of Ho 3+ near 2.0 μm are as high as 4.6 and 5.2 (× 10 −21 cm 2 ) in the 10 mol% BaF 2 modified Cr 3+ /Ho 3+ co-doped glass and the maximum energy transfer efficiency from Cr 3+ to Ho 3+ is about 42.5%. All results suggest that this BaF 2 modified Cr 3+ /Ho 3+ co-doped glass is very suitable for a high-efficient 2.0 μm fiber lasers with flexible pump sources.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Xintong Li,Zhichuan Yang,Shenglong Li,Min Gao,Yu Liu
Although remarkable progress has been achieved in electrocatalytic water splitting, the design of highly efficient bifunctional catalysts remains a significant challenge, mainly because of the slow kinetics of the oxygen evolution reaction (OER) and the limited stability of non-precious metal catalysts. This work presents a novel heterojunction catalyst consisting of Co–MnO nanocubes anchored on nitrogen-doped graphitic carbon derived from carbonized Ganoderma lucidum mycelium (CGLM), synthesized via an ion-exchange-coupled pyrolysis strategy. The unique fibrous entanglement morphology of CGLM offers ideal anchoring sites for catalytic centers, while preserving its intrinsic three-dimensional porous architecture to establish a continuous conductive network. This structural enhances electron transport efficiency and promotes stable immobilization of Co–MnO nanocubes (Co–MnO -2 /CGLM). Extensive experimental and theoretical investigations demonstrate that the Co–MnO -2 heterogeneous interface induces charge redistribution, synergistically optimizes the hydrogen adsorption free energy (Δ G H = −0.15 eV), and reduces the OER energy barrier, with a rate-determining step of Δ G 4 = 1.69 eV. The catalyst demonstrates remarkable bifunctional activity in alkaline media, exhibiting overpotentials of 105 mV for hydrogen evolution reaction (HER) at 10 mA cm −2 and 250 mV for OER at 50 mA cm −2 . Notably, the assembled electrolytic cell (Co–MnO -2 /CGLM||Co–MnO -2 /CGLM) achieves a voltage of only 1.61 V (50 mA cm −2 ) in overall water-splitting tests and maintains excellent durability, with negligible change in current density during prolonged operation. This study highlights the synergistic effect of heterogeneous structure engineering combined with biomass-derived carbon substrates in reducing reaction barriers and facilitating charge transfer, offering novel perspectives on the design of cost-effective electrocatalysts for sustainable energy conversion.
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ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Wenli Pei,Xiaoyang Wang,Chunhong Liu,Dong Zhao,Chun Wu,Kai Wang,Qiang Wang
Hyperbranched transition metal phosphides (TMPs) nanocrystals are an interesting class of materials, which can be used as an efficient catalyst for hydrogen evolution reaction (HER). However, big challenge remains for the preparation of ternary hyperbranched TMPs, and relationship between their HER performances and the splitting degree is also not well understood. Here, hyperbranched Co-Ni-P nanocrystals with different splitting degrees were prepared via a novel strategy, and their alkaline HER performances were studied. During the synthesis process, hyperbranched Co 2 P nanocrystals were used as template, and Ni precursors were injected into the reaction solution at different holding stage. When the Ni precursor was injected earlier, the podgy particles with low splitting degree would be obtained. Conversely, delaying the injection of Ni precursor would lead to high splitting degree. The formation process of ternary phase was also studied. After Ni precursor was injected, a Co-Ni-P amorphous layer was formed on the surface of the Co 2 P particles, and then the Ni atoms diffused into the Co 2 P phase to form Co-Ni-P nanocrystals. Electrochemical performances tests show that the splitting degree has great impact on HER performances. The higher splitting degree usually leads to larger electrochemical surface area, and higher catalytic activity can be achieved. The sheaf-like Co-Ni-P nanocrystals demonstrate a small overpotential of 119 mV at current density of 10 mA cm −2 , and good durability over 23 h in 1 M KOH solution. We believe that this work can help understand the relationship between the HER performances of hyperbranched TMPs nanocrystals and their splitting degree, and provide a synthetic strategy for the preparation of highly efficient TMPs catalysts.
研究领域:
材料科学
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电化学
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纳米技术
·
催化
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
·
IF 8.7
Meiyu Zhou,Jinxin Wang,Weiwei Cheng,Erna Li,Feng Xiao,Jialiang He,Lili Liu,Baocheng Xu
A Dual-Synergy strategy integrates supramolecular co-assembly with heterogeneous protein networks for efficient delivery. • DFT and IGMH analyses reveal π–π and C–H···π interactions drive Cur–Que co-assemblies’ synergistic antioxidant activity. • Cur/Que. co-assemblies reinforce the OVA/PPI network via extensive non-covalent interactions, elevating T peak to 91.21°C. • The composite gel restricts lipid digestion and boosts Cur and Que in vitro bioavailability to 58.96% and 63.17%. Hydrophobic phytochemicals often show limited solubility and low bioaccessibility during digestion, which restricts their use in functional food systems. In this study, a protein-based emulsion gel was developed by embedding a curcumin–quercetin supramolecular co-assembly within a composite network formed from ovalbumin and peanut protein isolate. The curcumin–quercetin co-assembly at a 5:5 ratio showed the strongest synergistic antioxidant activity, with a combination index of 0.598. Density functional theory calculations and independent gradient model analysis based on Hirshfeld partition indicated that π–π stacking and C–H···π interactions stabilized the co-assembled structure, modulated frontier orbital energy levels, reduced the energy gap, and increased electrophilicity, thereby enhancing radical-scavenging activity. The ovalbumin–peanut protein isolate composite at a 5:5 ratio formed a well-developed gel network and generated nanoscale embedded structures of approximately 779 nm through electrostatic and hydrophobic interactions. Incorporation of 1% curcumin–quercetin co-assembly resulted in encapsulation efficiencies above 97% for both phytochemicals. It also increased the storage modulus by 77.5% and improved water-holding capacity to 82.15%. Low-field nuclear magnetic resonance analysis showed a higher proportion of bound water, while the thermal transition temperature increased from 81.83 to 91.21 °C. These results indicate that the co-assemblies served as active crosslinking domains within the protein network through hydrogen bonding and hydrophobic interactions. During simulated digestion, the integrated co-assembly gel system delayed lipid digestion, with a free fatty acid release of approximately 58.55%, and increased the bioaccessibility of curcumin and quercetin to 58.96% and 63.17%, respectively. This study reveals how molecular co-assembly and protein gel structuring jointly improve the stability and delivery performance of hydrophobic phytochemicals, providing a basis for designing nutrient-dense functional food delivery systems.
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Journal of Energy Chemistry
·
2022
·
IF 13.599
Qiang Zhang,Yinyin Qian,Ji-Jun Zou,Ruijie Gao,Huaming Yang
Facilitating sulfur reduction reaction (SRR) is a promising pathway to tackle the polysulfide shuttle effect and enhance the electrochemical performance of lithium-sulfur (Li-S) batteries. Catalysts with a solo active site can reduce a reaction barrier of a certain transition-intermediate, but the linear scaling relationship between multi-intermediates still obstructs overall SRR. Herein, we construct tandem Co–O dual sites with accelerating SRR kinetics by loading highly dispersed cobalt sulfide clusters on halloysite. This catalyst features Co with upshifted d -orbital and O with downshifted p-orbital, which cooperatively adsorb long-chain polysulfide and dissociate an S–S bond, thus achieving both optimal adsorption–desorption strength and reduced conversion energy barrier of multi-intermediates in SRR. The Li-S coin batteries using the electrocatalyst endows a high specific capacity of 1224.3 mAh g −1 at 0.2 C after 200 cycles, and enhances cycling stability with a low-capacity decay rate of 0.03% per cycle at 1 C after 1000 cycles. Moreover, the strategy of the tandem Co–O dual sites is further verified in a practical Li-S pouch battery that realizes 1014.1 mAh g −1 for 100 cycles, which opens up a novel avenue for designing electrocatalysts to accelerate multi-step reactions.
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Nature Nanotechnology
·
2023
·Vol. 18
·期 3
·299-306
·
IF 38.3
Wei Pengfei,Gao Dunfeng,Liu Tianfu,Li Hefei,Sang Jiaqi,Wang Chao,Cai Rui,Wang Guoxiong,Bao Xinhe
Tuning catalyst microenvironments by electrolytes and organic modifications is effective in improving CO 2 electrolysis performance. An alternative way is to use mixed CO/CO 2 feeds from incomplete industrial combustion of fossil fuels, but its effect on catalyst microenvironments has been poorly understood. Here we investigate CO/CO 2 co-electrolysis over CuO nanosheets in an alkaline membrane electrode assembly electrolyser. With increasing CO pressure in the feed, the major product gradually switches from ethylene to acetate, attributed to the increased CO coverage and local pH. Under optimized conditions, the Faradaic efficiency and partial current density of multicarbon products reach 90.0% and 3.1 A cm −2 , corresponding to a carbon selectivity of 100.0% and yield of 75.0%, outperforming thermocatalytic CO hydrogenation. The scale-up demonstration using an electrolyser stack achieves the highest ethylene formation rate of 457.5 ml min –1 at 150 A and acetate formation rate of 2.97 g min –1 at 250 A.
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