APPLIED THERMAL ENGINEERING
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2025
·
IF 6.9
Jielin Zeng,Jiayi Han,Yuxin Zhang,Yutong Yang,Yapeng Wang,Shaoxiang Li,Jiaji Cheng
In order to save building energy consumption and improve the comfort of building occupancy, functional building coatings are widely used. Introducing microencapsulated phase change materials into epoxy resin coatings can endow them with temperature-control properties. To enhance the fire safety of buildings, this study, for the first time, couples P-N-Si three-element synergistic flame retardancy with phase-change thermal control. Hexachlorocyclotriphosphazene (HCCP) and silane coupling agent (3-Aminopropyl)triethoxysilane (APTES) was used as raw materials to prepare a new type of P-N-Si synergistic flame retardant (APZ) through nucleophilic substitution reaction. The introduction of APZ endows epoxy resin (APZ-PCM/EP) with excellent flame-retardant properties, and the peak heat release rate and total smoke production of APZ-PCM/EP are reduced by 22.9 % and 27.3 % respectively. Furthermore, the thermal responsiveness and phase change properties of the microcapsules modified with APZ (APZ-PCM) are enhanced, with the onset temperature of phase change occurring 1.5 °C earlier than that of MPCM. More importantly, the indoor temperature in the small-scale model room using APZ-PCM/EP is reduced by 29.5 % compared to that of the pure epoxy resin. This study presents a viable route to integrate fire safety with thermal comfort and offers a new strategy for smart temperature-control intumescent coatings on building exterior walls.
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Advanced Electronic Materials
·
2025
·Vol. 11
·期 8
·2400738
·
IF 5.3
Guodong Han,Song Zhao,Sai Sui,Bo Feng,Yudeng Wang,Junxiang Zhou,Zhuolun Li,Xiaoxia Tian,Yuxiang Jia,Jiafu Wang,Shaobo Qu
Metal–Organic-Frameworks (MOFs) are commonly used as microwave-absorbing materials after pyrolysis treatment. Rare researchers treat MOFs as non-conductive materials and use them as absorbing materials directly. In this paper, MOFs@P-C-800 composite materials are prepared adopt to hydrothermal and ultrasonic dispersion methods by regulating the morphological characteristics of MOFs and the content of P-C-800. As for the Co-BDC-P-C-800, the maximum reflection loss reaches −18.4 dB at 14.29 GHz and the effective absorption bandwidth (EAB) achieves 3.87 GHz from 13.5 to 17.37 GHz. After the contents of P-C-800 is adjusted, the Co-BDC-P-C-800 (0.05 g) exhibited excellent microwave absorption performance, the maximum RL value of −60 dB at 13 GHz with a thickness of 2.0 mm, and the EAB achieves 5.91 GHz from 12.02 to 17.93 GHz. This paper not only provides new application direction for MOFs, but also offers a promising direction for the research and development of absorbing materials.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Guowei Huang,Ruichao Wang,Wenchao Wu,Wangle Xue,Peng Wang,Hongli Li,Zhenbin Gong
Nanofriction plays an important role in the performance and lifetime of n-type or p-type TMD-based semiconductor nanodevices. However, the mechanism of nanofriction in n-type and p-type TMD semiconductors under an electric field is still blurry. In this paper, monolayers of n-MoSe2 and p-WSe2 materials were prepared by chemical vapor deposition (CVD), and their nanofriction behavior under positive electric field was investigated. Atomic force microscopy (AFM) was used to analyze the nanofriction by the positive voltage applied through the needle tip: both the friction and the friction coefficient of MoSe2 increased with the increase of the applied voltage, while the friction and the friction coefficient of WSe2 decreased with the increase of the applied voltage. As the applied voltage increases, the friction force and energy dissipation exhibit corresponding trends in relation to the surface potential. The accumulation and dissipation of carriers represent significant factors influencing friction change. The diverse types of carriers give rise to variations in the friction laws. Our experiments have revealed the differences and mechanisms of friction in TMD materials dominated by different carrier types at positive voltages. It provides guidance for the application and modulation of n- and p-type two-dimensional semiconductor materials in the field of friction.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Chen Yuqing,Wu Xuan,Yan Taihong,Wang Wentao,Liu Junjie,Wang Hui
NTAamide(C8) exhibits high selectivity for the extraction of Pu(IV) across a wide range of nitric acid concentrations. To separate trace Pu(IV) from radioactive liquid stream generated during the PUREX process in spent nuclear fuel reprocessing, a novel silica-polymer-based adsorbent, NTAamide(C8)/SiO 2 -P, was synthesized via vacuum impregnation using NTAamide(C8) as the extractant and SiO 2 -P as the support. The adsorption performance of Pu(IV) were systematically evaluated. Batch experiments revealed that adsorption equilibrium was achieved within 2 h, with a maximum adsorption capacity of 143.2 mg/g for Pu(IV). The material demonstrated high selectivity for Pu(IV) and exhibited excellent radiation resistance and hydrolytic stability. The adsorption mechanisms were further elucidated using X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations, confirming the formation of 1:1 complexes between NTAamide(C8) and the metal ions. Column experiments using actual uranium product solution from the PUREX process verified the material's performance in trace Pu(IV) removal. After column treatment, the Pu content in the uranium product solution was reduced to below 10 Bq/gU, with no significant loss of uranium. These results demonstrate that NTAamide(C8)/SiO 2 -P is a promising adsorbent for the efficient and selective separation of Pu(IV) from radioactive liquid stream under a wide range of nitric acid concentrations.
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Processes
·
2025
·Vol. 14
·期 1
·55
·
IF 2.8
Bao Fan,Jiale Xiong,Cuiluan Ma,Yu-Cai He
Gastrodin is a bioactive component of traditional Chinese medicine, exhibiting anti-cancer, anti-inflammatory, antioxidant and neuroprotective properties. It has broad application prospects in health foods, pharmaceuticals and cosmetics. In recent years, the conversion of biomass-derived aldehydes into high-value-added chemicals has garnered widespread attention. In this study, gastrodin was biosynthesized via a dual-enzyme coupling system consisting of UGTBL1-Δ60 and KpADH. Specifically, lignin-derivedp-hydroxybenzaldehyde was used as the substrate. First, the glycosylation ofp-hydroxybenzaldehyde by UGTBL1-Δ60 yieldedp-hydroxybenzaldehydeβ-glucoside, generating the glycosylation reaction solution. Subsequently, bioreduction of the glycosylation product by KpADH produced gastrodin. Under the optimal reaction conditions (0.05 g/mL KpADH whole cells, 50 mM glucose, pH 7.5 and 30 °C) a gastrodin yield of 82.8% was achieved within 12 h. Moreover, both UGTBL1-Δ60 and KpADH retained high catalytic activity after multiple reaction cycles. This study establishes a green and efficient biocatalytic approach for gastrodin synthesis, and also provides new insights into the high-value utilization of lignin.
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Frontiers in Nutrition
·
2025
·
IF 5.1
Yanan Wang,Xinyi Qian,Lingzhi Chen,Ling Yang,Zhenjiang Zhang,Zhilong Qu,Yuhan Yang,Yihao Li,Zaizhong Ni,Ying Shao,Anhui Chen
Introduction Although Phellinus igniarius has been shown to treat hyperuricemia (HUA) and gout, a self-inflammatory disease caused by purine metabolism disorders, the underlying mechanisms remain unclear. Polysaccharides are among the main components of P. igniarius with anti-inflammatory and immunoregulatory properties. Methods Here, we examined the therapeutic effects of polysaccharide SH-P-1-1 isolated from P. igniarius on HUA and gout, and explored the underlying mechanism, focusing on gut microbiota and metabolite regulation. Results SH-P-1-1 significantly decreased uric acid and creatinine levels, reduced xanthine oxidase and adenosine deaminase activities, alleviated kidney damage, and reduced urate deposition in joints in model rats. It increased the abundance of Blautia and Muribaculaceae but reduced that of the Lachnospiraceae_NK4A136_group , Lactobacillus , and Turicibacter . SH-P-1-1 also significantly modulated the metabolic profile and was closely related to some metabolic pathways, such as tryptophan metabolism, relevant to HUA and gout. The beneficial activities of SH-P-1-1 correlated with gut microbiota composition and differential metabolites, including short-chain fatty acids. Discussion Overall, this study demonstrates the potential of SH-P-1-1 as a natural supplement for preventing and managing HUA and gout.
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PubMed
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Drug Metabolism and Pharmacokinetics
·
2013
·
IF 2.071
Qiuxia Chen,Yicong Bian,Su Zeng
Caco-2 is a widely used cell model in drug absorption and P-glycoprotein (P-gp,MDR1) substrate identification. Long term vinblastine treatment of Caco-2 cells could increase the expression of P-gp, thus, the vinblastine resistant Caco-2 (Caco-2 vbl) cells can be used as a rapid and sensitive alternative model in identifying P-gp substrates. The mechanism of P-gp induction in this model is not clear, this study was therefore intended to clarify the possible factors involved in P-gp up- regulation in Caco-2 vbl cells. Since vinblastine is the inducer of both activator protein-1 (AP-1) and nuclear factor kappa B(NF-κB), we investigated the role of AP-1 and NF-κB in regulation of MDR1 gene expression. Our results indicated that the AP-1 and NF-κB luciferase activity was higher in Caco-2 vbl cells than that in Caco-2 cells by reporter gene assay. The mRNA expression of AP-1 subunit c-Jun and NF-κB was increased in Caco-2 vbl cells. The c-Jun inhibitor SP600125 and NF-κB inhibitor pyrrolidine dithiocarbamate (PDTC) suppressed the expression of MDR1 mRNA in Caco-2 vbl cells. In conclusion, this study provides the evidence that AP-1 and NF-κB are involved in the P-gp induction in Caco-2 vbl cells.
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PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2022
·
IF 4.446
Ying Zhang,Yucui Jiang,Bin Wei,Mingming Su,Hao Liang
Enzyme is an efficient green catalyst, but its vulnerability and difficulties of separation from products limited the application in industry. Furthermore, a large number of oxidase enzymes rely on dihydronicotinamide adenine dinucleotide (NADH) or dihydronicotinamide adenine dinucleotide phosphate (NADPH) cofactors . These cofactors are too expensive to be used in industrial processes. Thus, cofactor regeneration is an important method to avoid the consumption of large quantities of oxidized cofactor NAD(P) + in enzyme-catalyzed reactions. In this paper, Cu based metal nucleotides coordination polymers (MNCPs) with NAD(P)H oxidase activity were constructed by self-assembly of copper ions and nucleotides. Cu 2+ /AMP and Cu 2+ /GMP showed high catalytic activity and high reusability. Then, Cu 2+ /AMP with NADH oxidase activity was combined with NAD + dependent alcohol dehydrogenase (ADH) to construct a bienzyme cascade system with circulating cofactor, which applied to the conversion of benzyl alcohol to benzaldehyde. In this system, ADH exhibited high activity due to the increase of substrate concentration and the inhibition of the diffusion of intermediate products. Besides, the bienzyme cascade system also showed high stability and reusability. After 8 cycles, the immobilized ADH remained more than 57% of the initial activity. The prepared bienzyme cascade system can extensively extended its application in industrial production.
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ChemNanoMat
·
2022
·Vol. 8
·期 6
·e202200085
·
IF 3.82
Yang Gu,Chuqian Meng,Shuyue Dong,Hexin Zhu,Qian Liu,Yonglan Luo,Qingquan Kong,Tingshuai Li
High-performance earth-abundant electrocatalysts for oxygen evolution reaction (OER) are highly desirable. In this report, we successfully synthesized amorphous Fe−P shell electrodeposited on Co(OH)F nanowire arrays supported on titanium mesh (Fe−P@Co(OH)F/TM) as an efficient catalyst for OER. Such catalyst exhibits excellent OER activity with a low overpotential of 267 mV to reach the geometrical current density of 10 mA cm −2 in 1.0 M KOH. In addition, it has good electrochemical durability to maintain its activity for at least 20 h.
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高影响因子
ENERGY
·
2020
·
IF 6.082
Chaoling Han,Zhenqian Chen
In this work, a metal-free electrode substrate with unequal amounts of nitrogen and phosphorus co-doped graphene (N, P-G) and different spacer contents is synthesized from activated carbon (AC) via a one-step synthesis technique. Characterization of the chemical structures of this material shows that it has more active bonds and improves electrochemical performance as the anneal temperature increase. The unequal dope by the ratio of nitrogen to phosphorus is more than 2:1 can significantly improve oxidation-reduction reaction (ORR). With a mass ratio of 10% platinum, carbon (Pt/C) to 10% AC @ N, P-G as 2:1, the P-G composite electrodes demonstrate superior heat dissipation performance in comparison to traditional Pt/C electrodes due to the higher thermal uniformity and shorter thermal transport response time . With AC @ N, P-G as the electrode substrate material , a maximum output performance of 0.551 Wcm −2 is obtained at various temperatures, humidities, and mass ratio conditions, indicate a composite material with excellent ORR stability and high heat dissipation capacity on the electrode surface . Our experimental results show that an electrode substrate material with unequal amounts of N, P-G with AC spacer content is a promising candidate as a non-metallic substrate for proton exchange membrane (PEM) fuel cells.
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ChemElectroChem
·
2022
·Vol. 9
·期 16
·e202200530
·
IF 4.782
Yuchen Wei,Zhipeng Chen,Lei Yang,Hongqiang Li,Xiaojun He
Graphical SUPERcaps : N/P/S co-doped carbon nanosheets (NPS-CNs) were synthesized by acid-free and alkali-free strategy from pyrene for supercapacitors, achieving a high-rate capability (201.2 F g −1 at 100 A g −1 ) and high cycle stability (93.4 % of initial capacitance after 30000 cycles). It is still a challenge to prepare heteroatoms-doped carbon materials for supercapacitors by an acid-free and alkali-free synthesis method. Herein, the N/P/S co-doped carbon nanosheets (NPS-CNs) were synthesized by an in-situ K 2 CO 3 and Na 2 S 2 O 3 ⋅ 5H 2 O double activation method from pyrene as carbon source, melamine-phytic acid supramolecular aggregate as N and P source without the presence of acid and alkali. The as-prepared NPS-CN featured three-dimensional cross-linked nanosheets with abundant pores, boosting the stability of carbon skeleton and promoting the transfer of ion and electron. The abundant micropores together with high heteroatom content (15.09 %) provided abundant active sites and defects for ion adsorption. Benefitting from these merits, the NPS-CN electrode exhibits a high specific capacitance of 485.1 F g −1 at 0.05 A g −1 as well as good rate performance of 350.3 F g −1 at 20 A g −1 in three electrode system. Simultaneously, the specific capacitance of the NPS-CN capacitor reached 305.0 F g −1 at 0.05 A g −1 and retained 201.2 F g −1 at 100 A g −1 in two electrode system. Importantly, NPS-CN capacitor presented an excellent cycle stability (93.4 % of initial capacitance after 30,000 charge/discharge cycles). This work opened a less harmful route to prepare NPS-CNs from small polycyclic aromatic hydrocarbons for energy storage devices.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Ya Li,Ran Bi,Yanlei Su,Yafei Li,Chao Yang,Xinda You,Jianliang Shen,Jinqiu Yuan,Runnan Zhang,Zhongyi Jiang
Nanofiltration (NF) is a promising technology for fast molecular and ionic separation. Pore engineering is a critical but challenging strategy to fabricate NF membranes with high permeability and precise sieving ability. Herein, we proposed a post-modification approach to regulate the pore size of graphene quantum dots (GQDs) composite NF membranes by using a small molecule p-aminobenzoic acid (PABA) as a modifier. First, GQDs were used as the aqueous phase monomer of interfacial polymerization to react with trimesoyl chloride within the pores of the porous substrate, thereby fabricating large-pore-size GQDs composite NF membranes. After that, the self-polymerization of PABA within the pores of GQDs NF membranes would form nanoaggregates with different sizes, thus finely tuning the pore size of the as-prepared membrane. The PABA-modified membranes exhibited a range of pore sizes from 2.18 to 1.50 nm with the increased concentration of PABA. Specifically, the optimal PABA-modified membrane showed high water permeance of 128.1 L m −2 h −1 bar −1 and complete interception of 1000 Da-higher dye molecules, with desirable dye/salt selectivity factors of 877.0 and 175.4 for Alcian Blue/Na 2 SO 4 and Evans Blue/Na 2 SO 4 separation systems, respectively. Moreover, the membranes exhibited outstanding physicochemical stability. This study provides a facile method for pore size regulation of NF membranes.
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