Waste and Biomass Valorization
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2024
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IF 2.6
Luo Bo,Liu Huiyu,Shan Rui,Zhang Jun,Yuan Haoran,Chen Yong
Purpose This work aims to investigate the thermal behavior and kinetic characteristics of polyethylene (PE) pyrolysis over Cu/Ce modified ZSM-5. The influences of metal types, particles size of active center and interaction of Cu–Ce species on products distribution are elucidated. Methods Metal-modified ZSM-5 catalysts were prepared by negative pressure impregnation method. Catalytic fast pyrolysis and thermogravimetric experiments were conducted using Py–GC/MS and TG/MS for the qualitative and quantitative analysis of pyrolysis products. Results Morphology characterization indicated the interaction of Cu–Ce species facilitated the regulation of active center size into a nanoparticle scale. The final products were restricted to a carbon number of less than 9 over CuCe/ZSM-5. Cu–Ce modification increased the aliphatic content from 58.5 to 76.1%. Kinetic analysis revealed a remarkable reduction in activation energies during both the intermediate and final stages, where an average decrease of 30% was achieved. Conclusion The synergistic effects of Cu 0 and CeO x facilitated the formation of more short chain olefins by enhancing C–C bonds cleavage activity. Undesired polycyclic aromatic hydrocarbons (PAHs) were avoided by the optimal steric hindrance of CuCe/ZSM-5. Graphical Abstract
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Renzhi Xiong,Fangde Liu,Xiao Xiao,Yuhao Wu,Yanhe Xiao,Baochang Cheng,Shuijin Lei
While photocatalytic oxidation of 5-hydroxymethylfurfural (HMF) into valuable chemicals represents a crucial strategy for advancing carbon neutrality, low conversion rates and poor product selectivity hinder commercialization. In this study, a dual-sulfur-vacancy (S v )-mediated Cu 2 ZnSnS 4− x /ZnIn 2 S 4− x all-multinary-sulfide p-n heterojunction was designed for high-efficiency photocatalysis. Specifically, S v introduction significantly enhanced light absorption, photothermal properties, and interfacial electric fields (IEF). Consequently, the Cu 2 ZnSnS 4− x /ZnIn 2 S 4− x heterostructure achieved outstanding photothermal-assisted photocatalytic oxidation of HMF to 2,5-diformylfuran (DFF), with an oxidation rate of 94.1%, which was 9.1 and 4.0 times higher than that of Cu 2 ZnSnS 4 and ZnIn 2 S 4 , respectively. The selectivity of DFF reached 92.8%. Additionally, mechanistic analysis identified primary active species and possible reaction pathways. This study provides a potential strategy for the design of photocatalytic systems for efficient HMF oxidation.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 7
·3273
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IF 4.9
Tianxu Liu,Muyuan Ma,Yonglin Wu,Ismail Muhammad Asif,Daosen Chen,Lichong Liu,Minghui Zhang,Yijie Chen,Bin Li,Ling Wang
As the major polysaccharide in brown algae, fucoidan possesses broad biological abilities and has been reported to improve gastrointestinal health. Functional dyspepsia, a common non-organic disease, is a complex of symptoms mainly characterized by pathogenesis, such as visceral hypersensitivity, gastric dysmotility, and inflammation. To date, the effects of fucoidan in regulating functional dyspepsia with visceral sensitivity remains unclear. In the current study, iodoacetamide was employed to establish a mouse model of visceral hypersensitivity. Meanwhile, fucoidan was orally administrated for fourteen days. Indicators were conducted to evaluate the potential of fucoidan as the ingredient of complementary and alternative medicine for functional dyspepsia, such as levels of serum hormones, expression of receptors, and gut microbial profile. The results show that oral administration of fucoidan led to significant reductions in the secretion of 5-hydroxytryptamine, cortisol, and corticosterone. Additionally, it decreased the expression of 5-hydroxytryptamine-3receptors, with regulation of 5-hydroxytryptamine metabolism and improvement of gut microbial imbalance. The above results suggest fucoidan could ameliorate visceral hypersensitivity by modulating 5-HT metabolism and microbiota. The current findings indicate that fucoidan has potential as a biological component in the adjuvant treatment of functional dyspepsia and for its expanded utilization in the food and medical fields.
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CARBOHYDRATE RESEARCH
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2024
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IF 2.4
Qianqian Zhang,Tong Wan,Guocheng Jin,Shiai Xu
The objective of this study is to develop a drug carrier to overcome the inherent drawbacks of 5-Fluorouracil (5-Fu), including low bioavailability, short half-life, and systemic toxicity. In the present work, mesoporous silica nanoparticles (MSNs) capped by chitosan (CS) to encapsulate 5-Fu (5-Fu MSNs/CS) were fabricated by the sol-gel process, ultrasonic impregnation, and emulsion cross-linking. The 5-Fu MSNs/CS microspheres exhibit pH-responsive drug release and remarkable drug encapsulation capacity, as well as perfect sphericity, high specific surface area (680.62 cm 2 /g), and uniform particle size (2.64 ± 0.05 μm). The drug-loading content and encapsulation efficiency are 14.12 ± 0.53 % and 82.21 ± 2.13 %, respectively. The cumulative release of 5-Fu from MSNs/CS microspheres is fast and sustained at pH 5.0 (89.56 ± 0.97 %) compared to that at pH 7.4 (57.88 ± 0.91 %) in 96 h, and it is Fickian diffusion controlled. In conclusion, the MSNs/CS microspheres prepared in this study could be potential carriers for 5-Fu delivery.
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ELECTROCHIMICA ACTA
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2024
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IF 5.5
Dongyang Chen,Jingshu Wu,Dongchu Chen,Jiaqi Xu
Organic redox-active compounds are promising alternatives to traditional inorganic counterparts because of their sustainable resources and highly tunable properties. However, their solubility in organic electrolyte solvents and the sluggish electrode reactions hinder their further development. Herein, an intrinsically microporous decabromopropyl pillar[5]arene (P5Br) was used to support the methyl viologen (MV) functionality to yield two non-crosslinked and crosslinked organic electrode materials, namely MV-P5Br and CMV-P5Br, respectively. When evaluating against Li metal counter electrode, the MV-P5Br and CMV-P5Br electrodes delivered high discharge capacities of 87.9 and 92.7 mAh g −1 at 0.1 C, respectively, which are close to their theoretical values. After galvanostatic cycling at 0.1 C for 100 cycles, the CMV-P5Br electrode maintained a discharge capacity of 82.3 mAh g −1 , much higher than the 43.7 mAh g −1 of the MV-P5Br electrode. When the current rate was increased to 10 C, the CMV-P5Br electrode delivered a discharge capacity of 60.7 mAh g −1 , also higher than the 41.3 mAh g −1 of the MV-P5Br electrode. The increased cycling stability and rate performance of the CMV-P5Br electrode were attributed to the diminished solubility and the enhanced ion diffusion coefficient of the active material. When the counter electrode was changed to Na metal, similar results were obtained, suggesting that the CMV-P5Br electrode can also be used in Na-ion systems. This study demonstrates that the combination of crosslinked and microporous structure is highly effective to boost the electrochemical performance of organic redox-active compounds for rechargeable batteries.
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Toxics
·
2024
·Vol. 12
·期 6
·380
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IF 3.9
Hui Yang,Xue Zhang,Yadong Zhu,Bo Zhang,Junfeng Fan,Hongfei Zhao,Bolin Zhang
Acrylamide (AA) and 5-hydroxymethylfurfural (HMF), which are potentially carcinogenic to humans, are often produced during the hot processing of foods. This study first used a molecular docking model to simulate the binding behavior of four lactic acid bacteria peptidoglycans (PGNs) to AA/HMF, and the binding rate of LAB-based PGNs to AA/HMF was evaluated in vitro. In silico results show that interaction energy is the driving force responsible for the adsorption of LAB-derived PGNs to AA/HMF. In vitro results showed that the PGN ofB. lactisB1-04 bound the most AA (28.7%) and HMF (48.0%), followed byL. acidophilusNCFM,B. breveCICC 6079, andL. plantarumCICC 22135. Moreover, an AA/HMF-bound layer on the cell surface ofB. lactisB1-04 was observed via AFM and SEM due to adsorption. XPS analysis indicated the removal rate of AA/HMF by selected strains was positively correlated with the proportion of C-O, C=O, and N-H groups of PGNs. The atoms O1, O2, O3, O4, N1, N2, N3, H1, and H2 are involved in the adsorption of LAB-based PGNs to AA/HMF. Thus, the PGNs derived from these fourLactobacillusstrains can be regarded as natural adsorbents for the binding of AA/HMF.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Huiyu Liu,Chengyu Li,Rui Shan,Jun Zhang,Haoran Yuan,Yong Chen
The growing accumulation of waste polyethylene terephthalate (PET) has raised great concern about its effective upcycling. Catalytic fast pyrolysis is a promising method for selectively upcycling of waste PET into aromatics. However, the high temperature and poor mass transfer performance remain considerably challenging. In this research, a diffusion-enhanced hollow ZSM-5 catalyst with Ru modification was designed for low-temperature valorization of waste PET into aromatics. Ru species significantly enhanced the primary depolymerization of long-chain polymers by generating abundant Lewis acid sites, which markedly increased the aromatics content. Additionally, the mesopore-rich structure formed after Ru-modification improved diffusion capacity of products effectively. The existing of active Ru 0 species was beneficial to the hydro-upgrading of oxygen-containing intermediates, therefore monocyclic aromatic hydrocarbons (MAHs) content and hydrogen atom utilization increased to a great extent. More gratifyingly, the pyrolysis temperature for preparing aromatics from waste PET was obviously lowered, probably due to the synergistic effect of diffusion-enhanced structure and Ru modification. Ru/ZH exhibited higher aromatics yield of 46.4 wt% with selectivity of 95.3 % at 500 °C, resulting in a significant mass yield increase of 93.1 % compared to unmodified hollow ZSM-5 (24.0 wt%). Finally, the plausible pathway for PET-to-aromatics via catalytic fast pyrolysis over Ru/ZH was proposed.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Xiaohui Zhang,Xiaohua Zhang,Jie Zhang,Shuai Ma,Yu Liu,Zhenxing Yue
The medium-permittivity Ca 1- x Sr x La 4 Ti 4 O 15 (CSLT, x = 0.2, 0.4, 0.6, 0.8) ceramics are synthesized by high temperature solid-phase reaction method, and the impacts of Sr 2+ substitution on the microwave dielectric properties and defect behaviors are investigated in depth. X-ray diffraction (XRD) and Raman spectra demonstrate that Sr 2+ successfully incorporates the lattice to form a solid solution . Structure refinement and transmission electron microscope (TEM) indicate the formation of a 5-layer shifted hexagonal perovskite ceramic consisting of AO 3 layers stacked in a “ccchh” fashion. The dielectric constant of the well-sintered CSLT ceramics increases slightly with the increase of Sr 2+ substitution, while the Q × f value fluctuates within a small range of 41,100 GHz–48,750 GHz. Correspondingly, the prominent microwave dielectric properties of the Ca 0.6 Sr 0.4 La 4 Ti 4 O 15 ceramics are ε r = 47.0, Q × f = 48,750 GHz, and τ f = −10.5 ppm/°C. The thermal relaxation behaviors of the defect are systematically explored employing thermally stimulated depolarization current (TSDC) measurements, from which oxygen vacancies and defect dipoles are considered as the main defect types in ceramics. In addition, the ultra-fast discharge time ( t 0.9 = 15 ns) indicates that the CSLT ceramics have distinguished pulse discharge performance, promising for the applications of microwave capacitors.
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RARE METALS
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2025
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IF 11
Cheng-Feng Yi,Jing-Wen Li,Jia-Rui Li,Bing-Chuan Xue,Xing Lin,Zhi-Gang Liu
en Ni 3 S 2 has emerged as a promising catalyst for the electrochemical oxidation of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA), driven by its distinctive physicochemical properties. However, its practical catalytic efficiency is severely hindered by abundant electrochemically inactive surface sites and poor electronic conductivity. To overcome these challenges, an N,W-cooperative modulation of Ni 3 S 2 catalyst (N,W-Ni 3 S 2 ), featuring an engineered crystalline-amorphous heterostructure, is designed, utilizing 5,10,15,20-tetraphenylporphine (TPP) as the N source. This innovative architecture integrates W-doped crystalline Ni 3 S 2 and N-doped amorphous carbon, which synergistically enhances charge transport and induces interfacial charge polarization, substantially boosting catalytic activity. The optimized N,W-Ni 3 S 2 demonstrates unprecedented electrocatalytic performance for the oxidation of HMF to FDCA, achieving 100% HMF conversion, 97% FDCA yield, and 97% Faradaic efficiency, with over 95% retention in both FDCA yield and Faradaic efficiency across 10 consecutive cycles. Theoretical calculations and experimental results unveil that N incorporation exerts a more profound influence than W in reshaping the electronic landscape of Ni 3 S 2 , triggering an asymmetric electron redistribution at the heterogeneous interface. This unique electronic perturbation depletes the electron density around Ni active sites, creating an electron-deficient state that dramatically promotes the in situ generation of NiOOH as the true active species. Furthermore, the tailored electronic environment significantly lowers the energy barrier for the rate-determining step in the oxidation pathway, thereby enabling near-quantitative FDCA production with high efficiency. 摘要 zh Ni 3 S 2 凭借其独特的物理化学性质,已成为一种极具前景的催化剂,可用于将生物质衍生的5-羟甲基糠醛(HMF)电化学氧化为2,5-呋喃二甲酸(FDCA)。然而,其实际催化效率因大量电化学惰性表面位点和较差的电子导电性而受到严重阻碍。为解决这些问题,本研究设计了一种具有工程化晶态-非晶态异质结构的Ni 3 S 2 催化剂的氮、钨协同调控体系(N,W-Ni 3 S 2 ),并以5,10,15,20-四苯基卟啉(TPP)作为氮源。这种创新结构整合了钨掺杂的晶态Ni 3 S 2 与氮掺杂的非晶碳,二者协同增强电荷传输并诱导界面电荷极化,显著提升了催化活性。优化后的N,W-Ni 3 S 2 在HMF氧化生成FDCA的反应中表现出优异的电催化性能:HMF转化率达100%,FDCA产率达97%,法拉第效率达97%; 在10次连续循环中,FDCA产率和法拉第效率均保持在95%以上。理论计算与实验结果表明,在重构Ni 3 S 2 的电子结构方面,氮掺杂比钨掺杂的影响更为显著,可在异质界面处引发不对称的电子重新分布。这种独特的电子扰动会降低Ni活性位点周围的电子密度,形成缺电子状态,从而显著促进真正活性物种NiOOH的原位生成。此外,这种定制化的电子环境大幅降低了氧化路径中决速步的能垒,进而实现了高效且接近定量的FDCA生成。
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FUEL
·
2025
·
IF 7.5
Wenqian Song,Yuxin Wen,Guojun Kang,Wenqing Lv,Dekang Li,Haoquan Hu,Lijun Jin,Shijian Lu,Zhong Yan,Pengfei Liu
Amine-based solution absorption as the most promising and commercialized CO 2 capture method, attracted the increasing attention. However, its key lies in improving the CO 2 desorption performance while reducing the energy consumption in desorption. In this paper, HZSM-5 was dealuminated by sulfuric acid, further loaded by Fe 2 O 3 , Co 3 O 4 , NiO and ZnO via impregnation method and used in catalytic desorption of the blended amine solution of N-methyl-diethanolamine and piperazine. Results indicated that sulfuric acid leaching increased the number of acid sites and mesoporous surface area. When sulfuric acid reached 0.8 mol/L, the resultant catalyst (0.8H 2 SO 4 -HZ) improved the amount of the desorbed CO 2 by 10.26% and decreased the heat duty to 2128 kJ/mol CO 2 , with a reduction of 17.01% compared to non-catalytic system. The loading of metal oxides on 0.8H 2 SO 4 -HZ decreased surface area and changed acidity of catalysts. CO 2 desorption amount under catalysis of metal oxide modified M /0.8H 2 SO 4 -HZ followed the order of Fe/0.8H 2 SO 4 -HZ > Zn/0.8H 2 SO 4 -HZ > Ni/0.8H 2 SO 4 -HZ > Co/0.8H 2 SO 4 -HZ, whereas the relative heat duty was in order of Zn/0.8H 2 SO 4 -HZ > Co/0.8H 2 SO 4 -HZ > Ni/0.8H 2 SO 4 -HZ > Fe/0.8H 2 SO 4 -HZ. Fe/0.8H 2 SO 4 -HZ exhibited excellent catalytic performance, along with 12.82% increase in amount of CO 2 desorbed and reduction in heat duty to 2039 kJ/mol CO 2 , with a 20.49% decrease. Meanwhile, Fe/0.8H 2 SO 4 -HZ showed good stability after ten cycles and the addition of Fe/0.8H 2 SO 4 -HZ promoted CO 2 absorption. Suitable pore structure and abundant acid sites of the modified catalyst contributed to proton transfer and decomposition of carbamate. A possible mechanism for catalytic desorption over modified HZSM-5 was proposed. The work indicates that catalytic desorption by modified HZSM-5 catalyst is a promising way to decrease the energy consumption of amine solution regeneration.
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Microorganisms
·
2025
·Vol. 13
·期 12
·2874
·
IF 4.2
Wenli Quan,Shuanglian Chen,Han Li,Zhen Tang,Mohammad Nur Alam,Xun Liu
Monascuspigments (MPs) are valuable natural colorants, but their industrial production is often hampered by scarce high-yield strains and inefficient processes. In this study, a novel MPs-producing strain was isolated from red yeast rice and named asMonascus purpureusHC-5. This strain exhibited notable hydrolase activities, indicating a high efficiency in substrate utilization. In addition, using rice as the optimal substrate, the key parameters of solid-state fermentation were optimized. Response surface analysis revealed that soaking time and temperature were the most critical influencing factors. The optimal combination conditions were an inoculum size of 8.91%, a soaking time of 13.59 h, and a temperature of 32 °C. Under these optimized conditions, the MPs yield reached 2185 ± 255.7 U/g, which displayed an approximately four-fold increase compared to the initial unoptimized process. Briefly, this study identified a strain ofMonascus purpureusand optimized its solid-state fermentation conditions, which significantly increased the yield of MPs. This provides an important theoretical basis and scientific evidence for the large-scale industrial production of MPs.
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World Journal of Cardiology
·
2025
·Vol. 17
·期 12
·112062
·
IF 2.8
Yu-Bao Zhao,Zhi-Hong Bao,Ya Tu,Xia Qiu,Yin-Lan Bao,Min Su,Hai-Jun Qi,Quan Wan
BACKGROUND Myocardial infarction (MI) occupies a very high mortality and morbidity rate, and the search for effective pharmacological treatments has far-reaching implications for clinical research. AIM To explore the protective effects of Mongolian medicine Agari-5 on rats with MI. METHODS Sprague-Dawley rats were used, and both the Agari-5 and model groups had their coronary arteries clamped to induce MI. Proteomics was used to research the potential mechanism of action while ELISA, hematoxylin and eosin, and Masson’s staining were used to preliminarily investigate the protective impact of Agari-5 on rats with MI. RESULTS The current study has shown that Agari-5 might enhance cardiac function indicators, including echocardiography results of rats and creatine kinase, creatine kinase isoenzyme, and lactate dehydrogenase, in rats that had MI. According to the results of pathological staining, Agari-5 may lessen inflammatory cell infiltration and cardiomyocyte fibrosis, among other things. The proteome analysis revealed that there were 60 distinct proteins in total, four of which were associated with the heart. The expression of PSAT1, PDK1, SMAD4, and SDF2 proteins may be linked to the mechanism of their protective effects. CONCLUSION Potential therapeutic effects of Agari-5 for MI and its mechanism of action may be related to PSAT1, PDK1, SMAD4, and SDF2.
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