CERAMICS INTERNATIONAL
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2025
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IF 5.6
Pengfei Zhang,Jialin Bai,Shichao Wang,Min Zhang,Xiumin Yao,Xuejian Liu,Zhengren Huang
SiC/GNPs composites with high thermal conductivity and low resistivity were fabricated with graphene nanoplatelets (GNP) as additive by pressureless solid-state-sintering at 2200 °C. The effects of GNPs content and annealing process on the microstructure and properties of the SiC/GNPs composites were investigated. As the GNPs content increased from 0 to 3 wt%, the flexural strength, thermal conductivity, and resistivity of the SiC/GNPs composites correspondingly decreased. Compared to SiC ceramics without GNPs, the resistivity of the SiC/GNPs composites with 3 wt% GNPs content markedly decreases, from 10 8 to 6.18 × 10 2 Ω cm, while the thermal conductivity slowly drops from 144.2 to 117.8 W/(m·K). Additionally, the influence of annealing atmosphere on the electrical and thermal behavior of the composites was also examined. Annealing under argon resulted in increased thermal conductivity and decreased resistivity. When annealed in a nitrogen, the resistivity of the samples decreases significantly from 618 to 181 Ω cm, while causing only a slight decline in thermal conductivity. These findings highlight the benefits of argon annealing for enhancing the overall electrothermal performance of SiC/GNPs composites.
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Nanomaterials
·
2025
·Vol. 15
·期 17
·1327
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IF 4.3
Dan Ma,Yudong Zhang,Menghan Liang,Runyu Niu,Yao Ge,Yanan Zou,Xiaorui Dong
The development of efficient non-noble metal catalysts is critical for advancing sustainable fuel-cell technologies. This study investigates the effect of carbon support microstructure on the oxygen reduction reaction (ORR) performance of Fe-N-C catalysts. By precisely tuning the pyrolysis temperature of activated carbon (AC) between 600 and 1000 °C, we elucidate the mechanistic influence of the physicochemical characteristics of the carbon support on the ORR activity of the supported catalyst. Increasing the pyrolysis temperature enhanced the electrical conductivity of the carbon support, thereby improving the ORR performance of the catalyst. However, while the defect density and specific surface area of the carbon support initially increased with increasing pyrolysis temperature, they declined when elevated temperatures were used (e.g., 1000 °C), leading to reduced ORR activity. The AC-900 support, pyrolyzed at 900 °C, exhibited an optimal balance of a high surface area, abundant defects, and superior conductivity. An Fe phthalocyanine/AC-900 catalyst synthesized using the AC-900 support exhibited excellent ORR activity (E1/2: 0.89 V andEon: 0.95 V vs. reversible hydrogen electrode (RHE)) in 0.1 M KOH. This work highlights the pivotal role of carbon support microstructure in governing the ORR activity of the supported catalyst and provides a rational strategy for designing high-performance non-noble metal electrocatalysts.
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Journal of Functional Foods
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2025
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IF 4
Xiaoyu He,Yu Zhang,Haitian Fang,Ni Ma,Xueni Yan,Huabing Yang,Lu Cao,Lu Xu,Haiming Hu,Hongtao Liu
This study investigated the effects of Lactobacillus paracasei ( L. paracasei )-fermented Goji juice supernatant (FGS) on constipation. GC–MS data showed that the critical metabolites of FGS were nicotinamide, squalene, L-proline, melatonin, and sarcosine. FGS intervention significantly promoted intestinal peristalsis. Meanwhile, FGS ameliorated intestinal inflammation and mucosal barrier damage by inhibiting the expressions of pro-inflammatory factors (TNF-α, IL-1β, COX-2), promoting the expressions of Mucin 1, Mucin 3, ZO-1, AQP4, and ENac-γ. In addition, FGS treatment modulated gut microbiota composition, reduced the abundance of harmful bacteria ( Faecalibaculum , Bacteroides , Alloprevotella and Alistipes ), induced a bloom of probiotics, including Marvinbryantia , Eubacterium _ xylanophilum _group, Colidextribacter , and Candidatus _ Soleaferrea . Conclusively, this study demonstrated that FGS significantly reduced inflammatory response, prevented intestinal barrier damage, and modulated microbiota dysbiosis to improve constipation. Compared to unfermented Goji juice (UFGJ), FGS has shown a more effective anti-constipation effect, indicating that FGS could relieve constipation as a dietary therapeutic.
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Journal of Materials Chemistry A
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2025
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IF 9.5
Lingling Li,Mingli Ouyang,Lihua Zhu,Yingliang Feng,An Pei,Guang Li,Tongxiang Liang
Investigating how rare earth elements optimize the surface electronic states of noble metal-based electrocatalysts to enhance catalytic activity is of great importance, however, relevant studies on these reactions are significantly lacking. This study reports the synthesis of PdRE/C (RE = La, Nd, or Dy) catalysts and evaluated for methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). PdLa/C exhibits superior catalytic activity, with a mass activity (MA) of 2.28 A mgPd-¹ for MOR, outperforming PdNd/C, PdDy/C, and commercial Pd/C-JM with a high stability retention of 95.6%. For EOR, PdLa/C achieves a MA of 5.67 A mgPd-¹, 31.5 times higher than Pd/C-JM. The results show that RE doping has reduced the electronic density of Pd and attenuated CO* adsorption at Pd sites, RE2O3 can improve the dispersion of Pd nanoparticles (NPs) and expose more catalytically active sites, and the optimal performance of PdLa/C is attributed to the strongest electronic synergism of Pd-La2O3. In addition, in-situ Fourier transform infrared (FT-IR) shows that PdLa/C has enhanced ethanol adsorption and C-C bond cleavage and improved CO₂ selectivity.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2024
·
IF 3.9
Huiyu Yang,Xiaohua Cheng,Bin Lu,Yahui Zhou,Xin Liu,Shuai Peng,Bo Deng
Highly reflective substrate surfaces produce strong reflections of interfering and scattered light, which reduces the saturation and brightness of structural colors constructed by photonic crystals. Amorphous SiO 2 photonic crystals of 250–360 nm were synthesized using the Stober method, and then synergized with strongly light-absorbing carbon nanoparticles to construct a variety of structural colors on the surface of white cotton fabrics by electrostatic self-assembly. The vividness and stability of the structural colors on the surface of black cotton fabrics were also compared. The results showed that the structural color cotton fabrics had excellent washing fastness and abrasion fastness. The microscopic morphology of SiO 2 microspheres and structured color surfaces were investigated by Scanning electron microscopy (SEM). The compositional structure of SiO 2 microspheres was analyzed by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The color quality of structured color cotton fabrics was investigated using reflectance spectra and K/S values.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Chen Shu,Bin Chen,Weihu Zhang,Lele Cui,Wenheng Jing
Renewable electricity-driven hydrogen peroxide (H 2 O 2 ) electrosynthesis technology has recently emerged as a multidisciplinary research frontier as its distributed deployment capability can provide enhanced versatility for various potential niche applications. Despite significant progress in screening advanced electrocatalysts and fundamental understanding of microscopic reaction mechanisms, industrially viable electrolysis devices suitable for this technology are still lacking due to technical challenges such as low space/electrode utilisation and single-pass yield as well as poor operability. Here, we demonstrate a membrane-free dual-cathode stack reactor featuring compactness (inter-electrode distance configured to flow field plate thickness) and ideal electrode utilisation (two cathodes paired with one anode). Structurally discontinuous carbon films with self-sustained aeration are assembled as cathodes, which enables open air-fed O 2 -to-H 2 O 2 conversion and thus effectively simplifies operation. Even with low electrolyte concentrations (0.05 M Na 2 SO 4 ), this design demonstrates efficient H 2 O 2 production from bench- to industrial-scale operating current densities (75–200 mA cm −2 ) at relatively low cell voltages (5.9–11.0 V). Impressive single-pass H 2 O 2 accumulations of 959.6–2332.1 mg L −1 with current efficiencies of 55.1 %–90.7 % can be achieved at low hydraulic retention times of 15–60 s. The practicality and reliability of the device can be further elucidated by its robustness in decentralized wastewater remediation scenarios. This all-material/components-commercial design paves the way for advancing the technology readiness level of H 2 O 2 electrosynthesis processes.
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Nanomaterials
·
2025
·Vol. 15
·期 13
·
IF 4.3
Shenghua Yuan,Chengwen Ren,Ziwei Liu,Yu Chen,Wenhui Wang
Lithium-rich layered oxide (LLO) has received extensive attention from researchers due to its high initial discharge capacity (≥250 mAh g−1). However, defects such as its high initial irreversible capacity, voltage decay, and poor rate performance have severely limited its commercialization. These issues arise because the Li2MnO3component in LLO is activated during the initial cycle, leading to the participation of lattice oxygen anions (O2−) in redox reactions. This results in irreversible oxygen loss (O2) and subsequent structural phase transitions. To address these challenges, this study focuses on Li1.2Ni0.13Co0.13Mn0.54O2as the host material, utilizing abundant exposed (010) plane secondary particles and employing a vanadium (V) doping strategy to enhance electrochemical performance. The V forms strong V-O bonds with the lattice oxygen, effectively suppressing irreversible oxygen loss and improving structural stability. The results demonstrate that the LLO achieves the best electrochemical performance as the doping amount is 1 mol%, and the capacity retention improves from 74.5% (undoped) to 86% (V-doped) after 140 cycles at 0.5 C.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2025
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IF 6.2
Qi Zhang,Shuangshuang Bai,Mingwan Liu,Zhuhua Gong,Yun Ren,Wenlin Zhang,Qiang Li,Qinhong Liao,Zexiong Chen,Jianmin Tang
Biomass-derived magnetic biochar is a promising imidacloprid adsorbent because of its low cost, easy separation, and eco-friendly features. This study prepared a novel magnetic Fe 3 C@Fe 3 O 4 core–shell biochar nanocomposite (Fe 3 C@Fe 3 O 4 /BC) using a facile one-step method with Zanthoxylum bungeanum pruning branches as raw materials and K 3 [Fe(C 2 O 4 ) 3 ]•3 H 2 O as the pore-forming agent and Fe source. The prepared Fe 3 C@Fe 3 O 4 /BC had a well-developed porous structure, a considerable specific surface area of 1471.3 m 2 g −1 , good magnetic separation performance, and excellent adsorption performance of imidacloprid. The adsorption capacity of Fe 3 C@Fe 3 O 4 /BC toward imidacloprid reached 288.9 mg g −1 within 1 min, and its maximum adsorption capacity was 557.1 mg g −1 . The adsorption performance of Fe 3 C@Fe 3 O 4 /BC was was stable under extreme environmental conditions, and its regeneration was excellent, which was superior to typical commercial adsorbents. The adsorption mechanism of imidacloprid by Fe 3 C@Fe 3 O 4 /BC involved the comprehensive effects of pore capture, van der Waals forces, hydrogen bonding, electrostatic attraction, and complexation of oxygen-containing functional groups. This work can provide an advanced strategy for the fabrication of high-performance adsorbents from biomass resources for the effective treatment of imidacloprid wastewater.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Ishioma Laurene Egun,Qi Han,Tamar L. Greaves,Xiuhua Zhang,Yang Hou,Zhengfei Chen
Biomass-derived carbon has shown significant potential as an active electrode material for supercapacitors, primarily due to its intrinsic porous architecture and the presence of heteroatom dopants. However, achieving hierarchical porous carbon through a simple, single-stage thermal process with minimal resources is a significant challenge. In this study, we propose molten base carbonization and activation (MBCA) with wet biomass feedstock as a viable strategy for converting abundant waste coffee grounds into high-performance porous carbon. This method utilizes wet biomass and KOH to enable the intercalation of potassium ions into the biomass components matrix. Through nucleophilic interactions at various reactive oxygen sites, carbon and hydrogen bonds are disrupted, with K + intercalation resulting in organic potassium compounds prior to drying. These potassium compounds facilitate carbonization and in-situ activation in a single-stage thermal process. The optimized carbon sample (2-WCW) had a specific surface area of 1187 m 2 g −1 , abundant ultramicropores, oxygen and nitrogen functionalities. It also displayed high specific capacitance of 351 F g −1 at 5 mV s −1 and 120 F g −1 at 10 A g −1 in 6 M KOH with cycling stability of over 50,000 cycles and 96 % capacitance retention. The assembled device using an organic electrolyte displayed a specific energy and power of 5.6 Wh kg −1 and 5000 W kg −1 respectively, and further exhibited good self-discharge after 100 h. This study offers insights into the importance of the state of the biomass before thermal treatment for tuning its porous structure and surface functionalities for enhanced electrochemical performance in supercapacitors.
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FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Mengqiong Wang,Baifei Hu,Jimin Ni,Kun Liu,Shuanggui Tian,Junping Zheng,Songlin Liu,Hongtao Liu
Functional constipation (FC) has become a prevalent gastrointestinal disorder worldwide. Arctii Fructus , a plant used for both food and medicine, contains oils, dietary fiber and arctiin as its core components, which have been demonstrated to alleviate constipation. However, its underlying mechanisms remain unclear. This study evaluated the interventive effects of the water extract of Arctii Fructus (WAF) in constipated mice induced by loperamide. Integrated metabolomics and 16S rDNA sequencing revealed that WAF significantly reshaped the gut microbiota structure, regulated the plasma metabolic profile, and inhibited the glycerophospholipid metabolism pathway in constipated mice. MetOrigin analysis further indicated that microbiota-host interactions play a critical role in WAF-mediated constipation relief. Serum pharmacochemical analysis identified five WAF-dependent active components that were absorbed into the bloodstream following microbial transformation. Based on network pharmacology predictions, we proposed that WAF alleviates constipation by suppressing the NLRP3 inflammasome pathway. This mechanism was subsequently validated through assessment of the spleen index, histopathological examination of intestinal tissues, and detection of key protein expression in the NLRP3 signaling pathway. In conclusion, this study systematically elucidates the multi-dimensional mechanisms by which WAF alleviates functional constipation through the gut microbiota-metabolism-inflammation axis. These findings provide a solid scientific foundation for its development as a functional food to improve intestinal health.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Haoran Zhang,Hongjiang Li,Xianghong Wang,Shoukun Yu,Lixing Zhao,Enhao Zhao,Se Hyun Kim,Xinlin Li,Chenhao Cong,Yan Wang
With the rapid advancement of flexible electronics in healthcare diagnostics, real-time body temperature monitoring using electronic skin has become increasingly important for assessing and predicting human health status. Currently, most self-charging temperature sensing systems rely on thermoelectric effects, which are limited to transient detection and lack the resolution necessary to track subtle fluctuations in body temperature (e.g., <0.1 °C), thus constraining their practical use in wearable temperature monitoring. In this study, we developed a high-viscosity carbon-based electronic ink based on the synergistic interaction between 1D and 2D materials. Reduced graphene oxide (rGO) and multiwalled carbon nanotubes (MWCNTs) were used as active materials compatible with high-precision dispensing printing technology to fabricate flexible microtemperature sensors and microsupercapacitors (MSCs). The resulting temperature sensor, with a compact feature size, exhibited a high temperature coefficient of resistance (TCR = −1.08%) and fast response time (1.4 s), comparable to that of commercial rigid platinum-based thermometers. The serpentine electrode design and tightly packed internal structure imparted excellent stability under practical conditions, including encapsulation in insulating oil, mechanical deformation during motion, and repeated cycling. Furthermore, leveraging the versatility of printed electronics, we achieved a self-charging temperature sensing system based on the integrated microsupercapacitor. By incorporating IoT technologies and a bluetooth communication module, we realized real-time remote temperature monitoring, providing a promising platform for next-generation electronic skin in wearable wireless health diagnostics.
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Small
·
2025
·
IF 12.1
Junyu Lu,Lei Xu,Junjie Shu,Xuan Zhang,Cheng Xie,Yongfen Sun,Yiyao Ren,Changhao Zuo,Zhigang Shen,Shijie Xiao,Lei Li
Graphite-based materials hold significant applications in metallurgy, electronics, nuclear engineering, and new energy technologies, where catalytic graphitization offers a critical route for synthesizing high-purity artificial graphite. This study revealed the atomic-scale mechanisms of iron-catalyzed graphitization through experiment and molecular dynamics simulations: molten iron serves as a carbon transport medium via a dissolution-supersaturation-precipitation process, enabling continuous growth of micrometer-scale graphite through primary graphite crystallization. The microwave-assisted catalytic approach not only achieves a high graphitization degree of 95.12% at 1300 °C, compared to only 87.67% with conventional heating, but also significantly lowers the graphitization initiation temperature to 800 °C. The universality of this method is further demonstrated by its application to carbon fibers, yielding surface graphitization degrees exceeding 93%. This work provides a new technical approach and method for the efficient graphitization transformation of amorphous/microcrystalline carbon materials with broad implications for industrial applications.
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