Plants-Basel
·
2026
·Vol. 15
·期 16
·2443
·
IF 4.7
Yuhang Jiang,Zehong Qiu,Biaoshen Lin,Zhongping Yang,Yanping Hong
This study investigated the formation of a co-amorphous complex between ursolic acid and quercetin as a chemically defined model system for improving the formulation performance of a poorly soluble triterpenoid acid. Co-amorphous systems were prepared by solvent evaporation and physical grinding at different mass ratios. The optimal formulations were identified and evaluated by water-solubility measurement, powder X-ray diffraction (PXRD), Fourier-transform infrared spectroscopy (FTIR), and in vivo expectorant–antitussive assays. The solvent-derived system showed higher water solubility than the ground system. PXRD and FTIR results suggested that the solvent method more effectively promoted loss of crystallinity and probable intermolecular interactions, whereas the grinding method largely retained the crystalline features of ursolic acid. Both ursolic acid–quercetin formulations exhibited enhanced expectorant and antitussive activities compared with pure ursolic acid. Although quercetin may contribute intrinsic pharmacological activity, the overall improvements were broadly consistent with the altered physicochemical properties of the co-amorphous systems, which may facilitate ursolic acid delivery. As a secondary exploratory comparison, plant-derived triterpenoid-acid-rich and flavonoid-rich fractions fromEriobotrya japonicaleaves were also co-processed; however, because these fractions were not compositionally characterized, their results were interpreted cautiously and were not used as the primary basis for mechanistic conclusions. Overall, the present study demonstrates that co-amorphous complexation of ursolic acid and quercetin is a promising strategy for improving the solubility-related properties and in vivo activity of a poorly soluble triterpenoid acid.
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ACS Applied Nano Materials
·
2026
·Vol. 9
·期 29
·13869-13878
·
IF 5.8
Zhang Chenyuan,Li Jun,Liang Zhenjie,Wang Yingke,Lin Xuecheng,Jin Hongdu,He Dan,Wang Zhifeng,Chen Minrui,Wen Hui-Min,Hu Jun
The development of lightweight, broadband, and high-efficiency electromagnetic wave
(EMW) absorbing materials requires both strong attenuation and effective
impedance matching. To address this challenge, ZIF-67 was introduced
into a resorcinol-formaldehyde (RF) sol–gel system and carbonized
at 600–800 ° C to construct nanoscale Co/C nanoparticle-embedded
carbon aerogels (Co/C-CA). The resulting Co/C-CA composites contain
ZIF-67-derived nanoscale Co/C nanoparticles anchored within a hierarchical
porous carbon aerogel network, which helps preserve the three-dimensional
skeleton and creates magnetic-dielectric interfaces. The optimized
Co/C-CA-700 composite exhibited a minimum reflection loss (RL min ) of −60.9 dB and a maximum effective absorption
bandwidth (EAB) of 6.34 GHz. The improved absorption is attributed
to balanced impedance matching, interfacial polarization, dipole relaxation,
magnetic resonance, and conductive loss regulated by carbonization
temperature, together with cross-scale coupling between nanoscale
Co/C units and the carbon aerogel framework. This work provides a
structure-oriented strategy for lightweight and broadband EMW absorption.
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CRYOGENICS
·
2026
·
IF 2.5
Changkun Wang,Zuhua Chen,Jun Shen,Yong-Chang Lau,Heng Tu,Changmin Xiong
Single crystals of Ce 2 X 3 (NO 3 ) 12 ·24H 2 O (X=Cu, Co, CXN) were successfully synthesized, all crystallizing in the trigonal space group R ¯ 3 . Under a magnetic field variation of 0-9 T at 2 K, Ce 2 Cu 3 (NO 3 ) 12 ·24H 2 O and Ce 2 Co 3 (NO 3 ) 12 ·24H 2 O exhibit large magnetic entropy changes of 15.18 J·kg -1 ·K -1 and 16.19 J·kg -1 ·K -1 , respectively. Notably, the magnetic entropy changes of these novel crystals significantly exceed that of Ce 2 Mg 3 (NO 3 ) 12 ·24H 2 O (CMN), which is only 6.33 J·kg -1 ·K -1 under identical conditions. Meanwhile, the refrigerant capacity (RC), constrained-range equivalent refrigerant capacity product (RCP) and temperature-averaged entropy change (TEC) of CXN are also comprehensively superior to those of CMN. These performances suggest that CXN are promising candidates for ultra-low temperature magnetic refrigeration applications.
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Nano Energy
·
2026
·
IF 16.7
Maoxiang Li,Yachao Xu,Shijie Liu,Zihan Ma,Zhaojun Sun,Jianwei Zhang,Ying Wang,Mingyi Zhang
A strained Pd-O-Ti interface with abundant oxygen vacancies forms an electronic potential-well CO-hydrogenation box. • Spatial coupling of CO confinement and hydrogen activation enables exclusive CO 2 -to-CH 4 photoreduction. • This interfacial design provides a general strategy for deep CO 2 hydrogenation products. Solar-driven conversion of CO 2 to methane offers a route to carbon-neutral fuels, but directing the multielectron pathway beyond the CO intermediate remains a central challenge. Here, by growing Pd nanoparticles in situ on oxygen-deficient TiO 2 (Pd/TiO 2-x ), we construct an oxygen-vacancy-rich Pd-O-Ti interface that functions as a CO-hydrogenation box. Interfacial oxygen vacancies enrich and retain CO 2 -derived carbon intermediates, whereas adjacent Pd sites promote H 2 O activation and provide reactive surface hydrogen species in the same nanoscale region. This spatial coupling of CO confinement and hydrogen delivery favors sequential C-H bond formation and suppresses premature CO desorption, thereby redirecting CO 2 photoreduction toward CH 4 . As a result, Pd/TiO 2-x achieves 100% CH 4 selectivity with a CH 4 production rate 40 times higher than that of TiO 2 under AM 1.5 G irradiation. Under natural sunlight, the catalyst delivers a CH 4 production rate of 1.1 mmol h −1 g −1 and sustained activity over repeated daytime cycles. These results identify an interfacial design principle for steering multielectron CO 2 photoreduction toward deeply reduced hydrocarbon products. Download: Download high-res image (199KB) Download: Download full-size image
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Environmental Chemistry and Ecotoxicology
·
2026
·
IF 12.3
Yingying Lu,Le Li,Xinyi Wu,Bo Lv,Qu Cai,Zhi Wang,Juan Wang
The widespread presence of heavy metals, particularly cadmium (Cd), in agroecosystems has long raised environmental concerns, while emerging contaminants such as microplastics further complicate risk assessment and management. In this study, we investigated the combined effects of Cd and polystyrene nanoplastics (PS-NPs) on the physiological and immune responses of the wolf spider Pardosa pseudoannulata . Our results revealed progressive accumulation of PS-NPs in spider tissues, while Cd concentrations increased over time and varied with PS-NPs levels. Histological analysis showed that Cd exposure alone caused elongation and disorganization of midgut epithelial cells with leakage of intracellular contents, whereas co-exposure induced cell swelling, blurred boundaries, and intracellular particle retention. In addition, an increase in wall thickness of the gut was observed in all exposed spiders. Consistently, cellular damage was more pronounced under combined exposure, as evidenced by significantly increased hemolymph apoptosis, which exhibited a non-monotonic dose-response pattern. Transcriptomic analysis revealed extensive gene expression changes, especially in the high-concentration group. A set of shared differentially expressed genes was primarily associated with energy metabolism, immune response, and protein synthesis pathways, with oxidative phosphorylation and ribosome functions identified as key modules. Moreover, immune-related genes in “Apoptosis” and “Necroptosis” pathways displayed consistent expression patterns with apoptosis rates. Overall, these results demonstrate that NPs modulate Cd accumulation and toxicity in a non-monotonic dose-response manner, leading to distinct physiological and transcriptional responses in P. pseudoannulata . This study provides new insights into the ecological risks of combined pollutants and highlights the importance of considering their interactions in agroecosystem management.
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JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Shah Noor,Xiaoshuai Yu,Chunlin Li,Lei Sun,Zibo Zhao,Yan Liu,Chun Cheng Yang,Guoyong Wang
The rational design of high-performance electrocatalysts is essential for promoting the industrialization of electrocatalytic water-splitting technology. Herein, nitrogen-defects (Nd)-enriched g-C 3 N 4 (CN)-supported cobalt single-atom catalysts (Co-Nd/CN) are fabricated as high-efficiency bifunctional electrocatalysts for water splitting. Abundant Nd improves substrate conductivity and modulates the electronic structure of Co-N x active sites simultaneously. Benefiting from abundant coordination sites, lower charge transfer dynamics, and surface reactions, the optimized Co-Nd/CN exhibits the lowest overpotentials of 172 and 310 mV vs. RHE for HER and OER, respectively, at 10 mA cm −2 . Additionally, Co-Nd/CN delivers a full-cell voltage of 1.53 V at 10 mA cm −2 for overall water splitting with a Faradaic efficiency of 87.5%. Extended durability measurements demonstrate robust catalytic stability for Co-Nd/CN over 100 h of continuous operation. This work puts forward a novel approach based on elemental doping and defect engineering for the design of effective and enduring catalysts for water splitting.
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高影响因子
ChemCatChem
·
2026
·Vol. 18
·期 13
·e70895
·
IF 4.1
Lian Zou,Shanshan Zhang,Xin An,Zhengcheng Wang,Xin Dai,Shu Yang,Meng Gao,Hai Cui,Chengcheng Tian
Coupling oxygen-defect chemistry with charge-transfer dynamics in perovskite catalysts for formaldehyde (HCHO) photocatalytic abatement under mild conditions remains challenging. Herein, a continuous series of LaMn 1-x Co x O 3 perovskites was synthesized via a facile Pechini method to elucidate the role of B-site Co substitution in visible-light-driven HCHO oxidation. The optimal composition, LaMn 0.67 Co 0.33 O 3 (LMCO-2), achieves ∼95% degradation of 100 ppm HCHO within 15 min (0.198 min −1 ). Comprehensive characterizations attribute this superior performance to a Co-induced defect-charge synergy, encompassing the proliferation of vacancy-associated surface oxygen species, enhanced oxygen mobility, improved low-temperature reducibility, a narrowed band gap, and accelerated charge separation. Mechanistic investigations reveal that photogenerated holes (h + ) and singlet oxygen ( 1 O 2 ) act as dominant oxidative species, while superoxide radicals (∙O 2 − ) serve as crucial intermediate precursors. Furthermore, in situ DRIFTS confirms a stepwise oxidation pathway involving dioxymethylene and formate intermediates prior to ultimate mineralization into CO 2 and H 2 O. Graphical Optimized Co substitution endows LaMn 1-x Co x O 3 with enriched oxygen vacancies, a narrowed band gap, and efficient charge separation, enabling h + / 1 O 2 -driven HCHO oxidation with 95% removal within 15 min.
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IONICS
·
2026
·
IF 3.4
M Jayashree,C. V Manjunatha,Venkataramanappa Y.
A novel Co-Ni-ZnO decorated nitrogen-doped graphene oxide (Co-Ni-ZnO/NGO) nanocomposite was synthesized via hydrothermal and co-precipitation methods followed by calcination for sensitive electrochemical nitrite detection. The synthesized nanocomposite was characterized by UV-visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). FTIR confirmed the formation of metal-oxygen bonds, while XRD revealed a crystalline structure with an average crystallite size of 25 nm. SEM analysis demonstrated the uniform distribution of Co-Ni-ZnO nanoparticles on NGO sheets with an average particle size of approximately 29 nm, and EDX confirmed the presence of C, O, Co, Ni, and Zn elements. The electrochemical performance of the Co-Ni-ZnO/NGO modified glassy carbon electrode (GCE) was investigated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). The modified electrode exhibited enhanced electrocatalytic activity toward nitrite oxidation due to the synergistic interaction between the trimetal oxide nanoparticles and the conductive NGO matrix. Under optimized conditions, the sensor displayed a linear response range of 1.5–78 µM, a sensitivity of 1.945 µA µM⁻¹ cm⁻², and a low detection limit of 3.87 nM (R² = 0.9918). In addition, the sensor demonstrated excellent selectivity, reproducibility, and stability. Recovery studies in food and environmental samples confirmed its practical applicability. These results suggest that the Co-Ni-ZnO/NGO nanocomposite is a promising electrocatalytic material for reliable nitrite detection in environmental monitoring and food safety applications. Graphical abstract Scheme 1. Schematic illustration of the synthesis of the Co-Ni-ZnO/Nitrogen-Doped Graphene Oxide (Co-Ni-ZnO/NGO) nanocomposite and its proposed electrocatalytic mechanism for electrochemical nitrite detection
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Catalysts
·
2026
·Vol. 16
·期 10
·868
·
IF 4.5
Yanliang Yang,Huani Xu,Ying Duan,Yiyi Cheng,Yunmeng Wang,Dong Sui,Xuechuan Lv,Ming Li,Tianliang Lu
Ammonia borane (AB) is an ideal chemical hydrogen storage material owing to its high gravimetric and volumetric hydrogen capacities. However, the practical application through hydrolysis calls for catalysts that are efficient, stable, and low-cost. In this work, a CoxC/TiO2catalyst was synthesized by pyrolyzing a Co-MOF precursor supported on TiO2. The TiO2effectively dispersed the precursor and suppressed particle agglomeration, yielding highly dispersed Co nanoparticles that were uniformly embedded on the support within the carbon matrix after pyrolysis. The catalyst achieved a specific reaction rate of 10.7 molH2·molCo−1·min−1, which was approximately 9.7 times higher than that of the support-free CoC (specific reaction rate = 1.1 molH2·molCo−1·min−1), and significantly outperformed counterparts supported on SiO2or Al2O3. The catalyst also exhibited a low activation energy of 33.18 kJ·mol−1and retained about 60% of its initial activity after five cycles. XRD, SEM, and TEM characterizations confirmed the high dispersion of Co species and the morphological evolution induced by TiO2. The enhanced performance was attributed to the synergistic effect between Co active sites and the reducible TiO2via hydrogen spillover. Control experiments using Ni-based catalysts further verified that only reducible supports such as TiO2and ZrO2substantially enhanced activity, confirming the generality of the hydrogen spillover mechanism. This study provided a facile and effective strategy for developing high-performance, non-noble metal catalysts for chemical hydrogen storage.
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Wang Hongsheng,Zeng Yue,Lyu Shuai,Xiao Ping,Hadizadeh Mohammad Hassan,Wang Shan,Zhu Junjiang
Cu−Co bimetallic catalysts have demonstrated considerable potential for CO 2 hydrogenation to C 2 + alcohols. However, their practical application remains constrained by excessive CH 4 formation arising from the uncontrolled reduction of Co species under reaction conditions. Herein, we report a semi-encapsulated catalyst architecture constructed through a lattice-mismatching strategy. The lattice mismatch between hexagonal CoO (h-CoO) and ZnO is only 0.18%, whereas that between Cu 2 O and ZnO reaches 31.4%. When ZnO serves as the seed crystal, Cu 2 O preferentially nucleates and grows into nanoparticles on the ZnO surface, while h-CoO undergoes epitaxial growth on the exposed ZnO regions, forming a semi-encapsulated configuration in which Cu 2 O nanoparticles are partially confined by an h-CoO overlayer. The strong lattice matching between h-CoO and ZnO stabilizes Co species in an oxidized state under reaction conditions, thereby suppressing the formation of metallic Co and CH 4 production. Meanwhile, the confinement effect imposed by the h-CoO overlayer effectively restricts Cu migration, preserving the Cu−Co interfacial sites that are critical for C−C coupling. As a result, the optimized catalyst achieves a C 2 + alcohol selectivity of 63.7% at 300 ° C, with an ethanol selectivity of 30.0%, and exhibits no noticeable deactivation over 200 h of continuous operation. This work demonstrates that lattice-matching-directed interfacial engineering represents an effective strategy for simultaneously regulating active-phase stability and metal dispersion, offering new insights into the rational design of catalysts for selective CO 2 hydrogenation to C 2 + alcohols.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Shengyuan Wang,Zhenheng Sun,Jiuzhou Wang,Xiaosha Cui,Sida Deng,Yupeng Liu,Yanji Chen,Guihua Zeng,Yanrong Wang,Zhenxing Zhang,Wei Lan,Erqing Xie,Yaxiong Zhang
Solid state conversion electrodes are promising for aqueous energy storage but are frequently constrained by sluggish interfacial kinetics, leading to a persistent energy-power trade-off and underutilized capacity at high rates. Here we propose a chemical mediation strategy in which dissolved [Fe(CN) 6 ] 4− /[Fe(CN) 6 ] 3− couples continuously regenerate an interfacial oxidant to chemically drive the α-Co(OH) 2 to CoOOH conversion, thereby rewriting the rate limiting solid state electrochemical step into an electrochemical-chemical cascade at the electrode/electrolyte interface. Electrochemical analyses and spectroscopy corroborate the spontaneous oxidative phase transformation and the mediator enabled pathway reconstruction beyond simple solid–liquid capacity superposition. To make this capacity boosting strategy practically efficient, we further tune the initial redox composition of the mediator couple to suppress shuttle driven self-discharge while maintaining fast interfacial conversion kinetics, as quantified by multi-potential-step measurement (MPSM) and visualized by in situ Raman mapping. Consequently, the redox-enhanced alkaline Zn-Co battery exhibits a remarkable areal capacity of 0.98 mAh cm −2 (a 96% enhancement), while simultaneously retaining a high energy density of 0.92 mWh cm −2 and an ultrahigh-power density of 75 mW cm −2 . This work highlights a functional electrolyte design route to unlock deep solid state conversion capacity under high-power operation in aqueous batteries.
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LANGMUIR
·
2026
·Vol. 42
·期 30
·22007-22020
·
IF 4.4
Yuan Guokai,Li Qi,Xue Yuyang,Chen Qixiang,Yu Aijia,Xie Aijuan,Luo Shiping
Metal–organic
frameworks (MOFs) have attracted
considerable
research interest as versatile templating agents for synthesizing
transition metal compounds, particularly in electrocatalytic water
splitting applications due to their tunable spatial architectures
and compositional flexibility. This study investigated the in situ
growth of sulfur–phosphorus codoped NiFe-based MOF catalysts
on nickel foam (NF) substrates (FeNi 3 –CPS/NF) and
their bifunctional activities toward hydrogen evolution reaction (HER)
and oxygen evolution reaction (OER) in 1.0 M KOH. Electrochemical
measurements demonstrate that the FeNi 3 –CPS/NF catalyst
exhibits remarkable catalytic performance with low overpotentials
of 136 mV for HER and 75 mV for OER, and low Tafel slopes of 30.97
(HER) and 8.49 mV dec –1 (OER), respectively. The
charge transfer resistance ( R ct ) values
reach 2.328 Ω during HER and 2.149 Ω during OER, highlighting
efficient electron transfer. The electrochemical active surface areas
(ECSA) were determined as 1200 cm 2 for HER and 1425 cm 2 for OER. Stability assessments reveal excellent durability
under both HER and OER conditions, with current retention rates of
86.32% and 80.71% respectively after prolonged electrolysis. These
findings collectively establish FeNi 3 –CPS/NF as
a promising bifunctional electrocatalyst combining high catalytic
activity with exceptional stability for overall water splitting applications.
The innovative integration of heteroatom doping within the MOF architecture
offers new design strategies for advanced energy conversion materials.
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高影响因子
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