HIGH PERFORMANCE POLYMERS
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2019
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IF 1.584
Yinhong Liu,Yuhan Wei,Yongshuang Bian,Shengjiao He,Xin Wang,Xin Liu,Chenglei Li,Qi Wu,Xianyin Zeng,Hanguang Wang,Kuan Liu
Design and synthesis of highly selective fluorine ion probes become particularly important owing to the specific role of fluorine ion in chemical and biomedical progresses. As a new-type of fluorescent material, conjugated polymers with unique photometric properties have been widely researched by scientists in the field of the fluorescence sensors. In this study, the polymer PBTPV-OSi containing benzothiazole moiety is synthesized via palladium-catalyzed Heck coupling reaction. This polymer not only exhibits good solubility in organic solvents but also shows high selectivity for fluorine ion detection in comparison to other anions. Upon addition of F− to PBTPV-OSi solution, Si–O cleavage of PBTPV-OSi leads to the fluorescence quenching of the polymer in tetrahydrofuran dramatically, and the detection limit is 8 × 10−6 mol/L. Moreover, besides detecting fluorine ion from organic phase, the probe can also effectively detect potassium fluoride from inorganic phase. More importantly, a naked-eye detectable chromogenic and fluorogenic dual response to fluorine ion (F−) can be visibly noted and the detection process of fluorine ion is relatively fast.
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高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2018
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IF 2.975
Haiyang Wu,Yuntong Li,Birong Zeng,Guorong Chen,Yuzhe Wu,Ting Chen,Lizong Dai
In order to improve thermal and flame-retardant as well as mechanical properties of epoxy resins efficiently, a new P/N/Si-containing nano-filler called 2,4-(bis-polyhedral-oligomeric-silsesquioxane)-6-[(bis-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-yl)amine]-(p-4-hydroxyphenyl)-1,3,5-triazine (abbrev. PDT) was synthesized by nucleophilic aromatic substitution reaction and was combined with curing-agent to prepare epoxy resin composites, incorporating both nanocaged framework of Si O and rigid phenyl-rings from triazine and DOPO into the epoxy matrix at molecular level. The prepared EP-PDT composites were characterized by means of techniques such as TGA-IR, Raman, SEM, EDX analysis, Py-GC/MS and XPS etc. It showed that all samples had a single T g , indicating that these epoxy composites were homogeneous phase for long-term use. Both the LOI value and char yield increased with the increasing of PDT content, while the corresponding PHRR and THR data of EP composites dropped. SEM revealed that PDT in EP composites self-assembled into nano-sized particles, resulting in an enhanced mechanical property. Py-GC/MS and XPS characterizations showed that PDT could release free radicals and promote the char formation deriving from the synergic effect of phosphorus, nitrogen and silicon during combustion, which resulted in the formation of quenching and barrier effects to endow the EP composites with excellent thermal stability and flame retardancy for potential applications in many fields.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Qin Wu,Chi Fan,Ya Wang,Xiaoping Chen,Guimin Wang,Zhengxing Qin,Svetlana Mintova,Junhua Li,Jianjun Chen
The reduction of NO x emission during the cold start period of diesel vehicles requires special attention in accordance with the emission regulations. In this work, the direct incorporation of cerium and copper in SAPO-18 catalyst with AEI type framework structure (CuCe-SAPO-18) resulting in a substantial enhancement of the performance in the low-temperature NH 3 -SCR reaction (<200 ℃). A small amount of cerium (0.13–0.31 wt%) broadened the reaction temperature range of use and increased the hydrothermal stability of the catalyst considerably. The cerium species was introduced in the ion-exchange sites of Cu-SAPO-18 in the form of Ce 3+ ions even with high loading (3.15 wt%). The Ce 3+ ions were found to affect the distribution of silicon and aluminum atom coordination ( 29 Si NMR, 27 Al MAS NMR) in the AEI-type skeleton structure leading to an increase of both the amount of active Cu 2+ species and the acidity of the CuCe-SAPO-18 catalysts that are beneficial for the NH 3 -SCR reaction.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Zican Zhang,Xiaoying Sun,Jiaqi Wang,Guorong Chen,Liyi Shi
Poly(acrylic acid) (PAA) has been widely studied as a silicon (Si) negative electrode binder, however, its poor adhesion and insufficient ion conductivity have always constrained its practical application in lithium-ion batteries (LIBs). A multifunctional binder was created by the lithiophilic poly(hexaazatrinaphthalene) (PHATN) enhancing PAA via forming physical and chemical crosslinking network (PAA-PHATN), addressing the widespread challenges of active material detachment caused by the irreversible volume expansion and impedance increase caused by low ionic conductivity in Si anode. The -C=N- and -NH 2 groups in PHATN interacted with the carboxyl groups in PAA through hydrogen bonding and amide formation, respectively, resulting in exceptional tensile strength (>2.3 MPa), remarkable ductility (up to 490 % strain tolerance), and high Li + conductivity. When applied in silicon electrodes, PAA-PHATN binders effectively mitigate Si particle pulverization during lithiation, accelerate Li + diffusion (with a diffusion coefficient of D Li + ≈ 2.43 × 10 −9 cm 2 s −1 ), and promote the formation of an inorganic-rich solid-electrolyte interphase (SEI) dominated by LiF. Consequently, the PAA-PHATN-based silicon anode delivers outstanding stability (1587.6 mAh g −1 after 500 cycles at 0.5 A g −1 ) and rate capability (1074.1 mAh g −1 at 5 A g −1 ), outperforming conventional PAA binders. This work highlights an effective strategy of binder design in balancing mechanical strength, adhesion, ion conductivity, and SEI components for Si based anode.
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PubMed
高影响因子
INORGANIC CHEMISTRY
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2018
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IF 4.7
Leyan Nian,Kui Wu,Guijie He,Zhihua Yang,Shilie Pan
In the exploration of new infrared nonlinear optical (IR NLO) materials, element substitution has been developed as an effective way to adjust the structural features and material performances. A series of new IR NLO materials have been discovered in the I–Ba–MIV–Q system (I = Li, Na, Cu, and Ag; MIV = Si, Ge, and Sn; Q = S and Se), and they undergo interesting structural transformation with different element substitution except Li analogues. Herein, we have successfully synthesized three selenides with different space groups (Ag2BaSiSe4: I4̅2m; Ag2BaGeSe4 and Ag2BaSnSe4: I222) in the above system and studied their properties through experimental and theoretical methods. Remarkably, the detailed analysis on the structural changes and properties comparison was also systematically investigated in the I–Ba–MIV–Q system and the results indicate that the distortion degrees of different IQ4 tetrahedra play the critical role to cause the structural transformation with the M or Q elements substitution. More importantly, we have also found that the structural changes have the close relationship with the distance d(I–I) between adjacent I cations in the I2BaSnSe4 system, which makes the four-membered rings formed by edge-sharing BaSe8 units change from the square to rhombus with the increase of d(I–I). The properties comparisons (band gap and NLO effect) in this system have been also systematically studied.
研究领域:
材料科学
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无机化学
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光学材料
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固态化学
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高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2026
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IF 4.6
Xiuyuan Yin,Xinxing Li,Hu Sun,Ning Ding,Lei Ren,Hongqi Shi,Hongxia Wang,Jing Liang,Changsheng Liu
During the rapid solidification of laser melting deposition, poor melt pool fluidity in Nb Si based alloys results in insufficient pore wetting and filling, significantly degrading the mechanical properties. To address this issue, controlled addition of rare earth Yttrium (Y) was utilized to improve melt fluidity, thereby enhancing the density of the deposited layer and optimizing mechanical properties. Results show that an appropriate Y (0.15 at.%) addition increased sample density from 99.83 % to 99.97 %. Y addition did not alter the primary phase constituents of the alloy, which remained Nbss, α-Nb 5 Si 3 , and γ-Nb 5 Si 3 phases, but it affected the phase fractions. With the increase of Y content, the total silicide content increased in the alloys, alongside the precipitation of more nanoscale Y 2 O 3 and γ-Nb 5 Si 3 phases. The alloy with 0.15 at.% Y addition achieved maximum fracture toughness of 15.13 MPa·m 1/2 due to microstructure refinement and compactness improvement. For compressive strength, a continuous enhancement was observed up to 2358.9 MPa in alloys with 1.0 at.% Y addition, which was attributed to increased silicide content, the enhanced solid solubility of Y in the Nbss phase, and the increased content of nanoscale Y 2 O 3 and γ-Nb 5 Si 3 precipitates.
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高影响因子
Surfaces and Interfaces
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2025
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IF 6.3
Chun Yu,Liangzhen Zhu,Yanjin Lu,Yi Zhao
CoCr-based alloys are widely utilized in dental implants and serve as metallic frameworks for porcelain-fused-to-metal (PFM) restorations, owing to their cost-effective, excellent wear and corrosion. However, interfacial failure between the base alloy and the porcelain arose over extended periods of use in oral environments. Therefore, establishing a reliable metal-porcelain interface is of critically importance. This study investigates how the addition of boron impacts the pre-oxidation scale and its mechanical properties of Co-Cr-W-Cu-Si-(0, 0.5, 1.1 wt.%) B alloys at 928 °C for 10 mins in air. Surface analysis indicated that Si and B stabilized Cr 2 O 3 scale grown on the surface of CoCr based alloys. As the B concentration increased, the scale became thinner, and its morphology transformed from Cr 2 O 3 to a combination of outer CoCr 2 O 4 spinel and inner Cr 2 O 3 . Amorphous SiO₂ was detected along the scale-alloy interface together with B 2 O 3. The mechanical stability of the scale along with its adhesion to the matrix increases with increasing B concentration. The synergistic impact of Si and B is probably due to the amorphous innerlayer playing as an effective barrier to the transportation of reactants and slow down the oxide scale growth. Meanwhile, the morphology of pining-like arrangement for amorphous SiO 2 layer increases the factual contact area between the oxide scale and matrix, rendering it less susceptible to fracture.
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高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2022
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IF 3.571
Hui Liu,Si-Yu Wang,Jin-Hao Zhu,Jin-Di Xu,Shan-Shan Zhou,Ming Kong,Qian Mao,Song-Lin Li,He Zhu
Si-Jun-Zi decoction (SJZD) with ginseng as the principal medicinal herb is a traditional Chinese Medicine multi-herb prescription that commonly employed to treat colorectal cancer etc. Previous studies showed that nearly half of the commercial ginseng was sulfur-fumigated, one of the postharvest processing methods that commonly causes sulfur-dioxide (SO 2 ) residue and chemical composition transformation in medical herbs. In this study, the effect of sulfur-fumigated ginseng on global quality of SJZD was evaluated by UPLC-QTOF-MS/MS based metabolomics and multiple chromatographic techniques based glycomics strategies. For non-saccharides components, sulfur-fumigated ginseng led to the emergence of sulfur-containing derivatives and alteration of saponins and flavonoids in SJZD. For saccharide components, sulfur-fumigated ginseng decreased the total contents and molecular weights of polysaccharides , changed the monosaccharide composition of polysaccharides, and increased the contents of oligosaccharides and free monosaccharides of SJZD. The alterations of SJZD were aggravated with the sulfur-fumigated content of ginseng. Those phenomena might be attributed to 1) sulfur-fumigation caused the generation of sulfur-containing derivatives in ginseng, which further transferred to SJZD, and 2) sulfur-fumigation caused the residue of SO 2 in ginseng, which reduced the pH value and further changed the dissolution of saponins and flavonoids and accelerated the degradation of the polysaccharides to oligosaccharides and/or monosaccharides in SJZD. Furthermore, although storage reduced the SO 2 residue in sulfur-fumigated ginseng, it couldn’t recover the alterations of chemical profiles in SJZD. In conclusion, sulfur-fumigated ginseng altered the global quality of SJZD, which promoted that extra attention must be paid during the application of herbal formulas that containing sulfur-fumigated herbs.
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PubMed
高影响因子
FUEL
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2019
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IF 5.128
Han Jiang,Bin Guan,He Lin,Zhen Huang
This study focuses on investigating the influence of Si/Al ratio on the performance of hydrothermally aged Cu/SSZ-13 catalysts prepared by in situ hydrothermal synthesis method. It was found that NH 3 -SCR performance and hydrothermal stability of Cu/SSZ-13 decreased with increasing Si/Al ratio. Fresh and hydrothermally aged Cu/SSZ-13 with Si/Al ratio of 6.5 showed the best SCR activity and N 2 selectivity in a broad temperature of 200–500 °C, in which more than 90% NO x was reduced with superior N 2 selectivity above 95%. The effect of Si/Al ratio on the properties of the physicochemical structure, the change of acidity intensity, and Cu species migration or transformation of the fresh and aged Cu/SSZ-13 catalysts were comprehensively characterized by NH 3 -TPO, NH 3 -TPD, H 2 -TPR, N 2 physisorption, XRD, ICP-AES, and XPS. The increase of the surface CuO species, the decrease of the amount of Cu 2+ in active sites, the chemisorption NH 3 species, the specific surface area, the total pore volume, and the increase of average pore diameter, may be the main reasons for performance deterioration over high-Si/Al-ratio catalysts after hydrothermal aging. Furthermore, in situ DRIFTS indicate that, with the increasing Si/Al ratio, the zeolitic structure was easy to collapse, and that the surface acid sites, the active copper species, as well as the adsorbed surface nitrate, decreased after hydrothermally aged. After hydrothermal aging, the amount of isolated Cu 2+ decreased, and more CuO species were aggregated, mainly coming from the conversion of the unstable isolated Cu 2+ species in D6R or CHA cages. The decrease of isolated Cu 2+ and CuO species aggregation were significant in Cu/SSZ-13 with high Si/Al ratios. The CuO leaded to the instability of the SSZ-13 skeleton structure and NH 3 oxidation promotion, resulting in catalysts deactivation.
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JOURNAL OF ETHNOPHARMACOLOGY
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2018
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IF 3.115
Min Zhang,Ying Peng,Mengyue Wang,Beibei Gao,Lijuan Zhao,Xiaobo Li
Ethnopharmacological relevance In traditional Chinese medicine , processed aconite root (lateral root of Aconitum carmichaelii Debx.) is used as the principle herb of the Si-Ni decoction (SND) formula due to its cardiotonic effect, while its cardiotoxicity and neurotoxicity caused by diester and monoester diterpenoid alkaloids are reduced by compatibility of dried ginger and honey-processed liquorice in SND. Aim of the study To investigate the detoxification of processed aconite root by compatibility of SND from the perspective of intestinal absorption with metabolism in intestinal bacteria . Materials and methods Decoctions of processed aconite root (AD), processed aconite root and honey-processed liquorice (ALD), and SND with the same amount of each herb were prepared, then were incubated in human intestinal bacteria juice (IBJ) in vitro for different durations. Bidirectional transmembrane transports of these decoctions and their IBJ-incubated decoctions were conducted on Caco-2 monolayers. Correlation between efflux ratios changes of benzoylmesaconine, benzoylaconine, benzoylhypaconine (monoester-diterpenoid alkaloids, MDAs) and hypaconitine (diester-diterpenoid alkaloids) from processed aconite root, and metabolic trends of compounds from honey-processed liquorice and dried ginger were also performed. Results The absorption of MDAs from processed aconite root was increased by combination with honey-processed liquorice in ALD, but they were decreased significantly by the addition of dried ginger in SND. Take benzoylhypaconine for example, the P app, AP to BL soared from ( 3.13 ± 0.18) × 10 −7 cm/s in AD to (23.32 ± 3.51) × 10 −7 cm/s in ALD, while it dropped to (1.12 ± 0.17) × 10 −7 cm/s in SND. When herb combined decoctions metabolised by intestinal bacteria for 12 h, the efflux ratio of benzoylhypaconine were both increased from 0.56 to 1.21 in ALD and from 1.10 to 2.61 in SND, which was correlative with the generation of davidigenin and glycyrrhetic acid (the metabolites of chalcones and pentacyclic triterpenoids from liquorice) in ALD and with the metabolism of [6]-gingerol (the major compound from dried ginger) in SND, respectively. Conclusions Compatibility of SND altered the intestinal absorption of toxic MDAs and hypaconitine from processed aconite root. In SND, dried ginger rather than honey-processed liquorice played the role of detoxification of these toxic compounds in the intestinal absorption. The intestinal detoxification of SND was significantly and strongly correlative with metabolism of dried ginger and honey-processed liquorice by intestinal bacteria, simultaneously.
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高影响因子
JOURNAL OF ETHNOPHARMACOLOGY
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2024
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IF 4.8
Yanru Liu,Hui Chen,Gongjun Yang,Fang Feng
Ethnopharmacological relevance Yin-Chen-Si-Ni Decoction is a classical traditional Chinese medicine (TCM) prescription that is used clinically for treating cholestatic liver injury (CLI) and other hepatic diseases. However, the material basis and underlying mechanisms of YCSND are not clear. Aim of the study : To investigate effective components and mechanisms of YCSND in the treatment of CLI using serum pharmacochemistry, metabolomics, and network pharmacology. Materials and methods Biochemical indicators, liver index, and histopathology analysis were adopted to evaluate the protective effect of YCSND on ANIT-induced CLI rats. Then, a UPLC-Q-Exactive Orbitrap MS/MS analysis of the migrant components in serum and liver including prototype and metabolic components was performed in YCSND. In addition, a study of the endogenous metabolites using serum and liver metabolomics was performed to discover potential biomarkers, metabolic pathways, and associated mechanisms. Further, the network pharmacology oriented by in vivo migrant components was also used to pinpoint the active ingredients, core targets, and signaling pathways of YCSND. Finally, molecular docking and molecular dynamics simulation (MDS) were used to predict the binding ability between components and core targets, and a real-time qPCR (RT-qPCR) experiment was used to measure the mRNA expression of the core target genes. Results Pharmacodynamic studies suggest that YCSND could exert obvious hepatoprotective effects on CLI rats. Furthermore, 68 compounds, comprising 32 prototype components and 36 metabolic components from YCSND, were found by serum pharmacochemistry analysis. Network pharmacology combining molecular docking and MDS showed that apigenin, naringenin, 18β-glycyrrhetinic acid, and isoformononetin have better binding ability to 6 core targets (EGFR, AKT1, IL6, MMP9, CASP3, PPARG). Additionally, PI3K, TNF-α, MAPK3, and six core target genes in liver tissues were validated with RT-qPCR. Metabolomics revealed the anti-CLI effects of YCSND by regulating four metabolic pathways of primary bile acid and biosynthesis, phenylalanine, tyrosine and tryptophan biosynthesis, taurine and hypotaurine metabolism, and arachidonic acid metabolism. Integrating metabolomics and network pharmacology identified four pathways related to CLI, including the PI3K-Akt, HIF-1, MAPK, and TNF signaling pathway, which revealed multiple mechanisms of YCSND against CLI that might involve anti-inflammatory and apoptosis. Conclusion The research based on serum pharmacochemistry, network pharmacology, and metabolomics demonstrates the beneficial hepatoprotective effects of YCSND on CLI rats by regulating multiple components, multiple targets, and multiple pathways, and provides a potent means of illuminating the material basis and mechanisms of TCM prescriptions.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Xinqian Li,Bo Li,Shuqi Li,Yaping Dong,Dandan Gao,Zhengrong Niu,Wu Li,Haitao Feng
Removing impurities from hexavalent chromium system without secondary pollution is the key to the successful development of green chromate production technology. Here, hydrated chromium oxide CrO x (OH) 3-2x with lamellar cluster microsphere structure was prepared by in-situ hydrothermal method and used to simultaneously adsorb Si (IV) and V (V) in high concentration Cr (VI) solution. In the in-situ hydrothermal process of pH 7, 160 ℃ for 8 h, the Si (IV) and V (V) removal rates of the actual chromate production Na 2 Cr 2 O 7 -Na 2 SiO 3 -NaVO 3 -H 2 O solution can reach 92.27 % and 94.81 %, respectively, which is higher than the ex-situ removal efficiency of Si (IV) (62.88 %) and V (V) (63.16 %) under the same conditions. Further characterization of STEM-elemental mapping, XPS and FT-IR results indicate that during in-situ adsorption, Si (IV) and V (V) are mainly adsorbed on the surface of CrO x (OH) 3-2X adsorbent by interacting with surface hydroxyl groups. More importantly, the simultaneous formation and adsorption of the adsorbent are more conducive to the full utilization of active adsorption sites on the adsorbent surface. After that, CrO x (OH) 3-2x was converted into nano Cr 2 O 3 with a purity of 97.87 % by simple desorption and calcination processes. In addition, the results of UV–vis DRS and SEM show that the residual Si and V elements in Cr 2 O 3 unexpectedly increase the size of the particles to about 300 nm, which redshifts the absorption band of the blue region by 3.3 nm. This results in more red absorption and makes Cr 2 O 3 more yellowish-green and exhibits excellent pigment properties. Thus, the in-situ synthesis, synergistic adsorption and green conversion of trivalent chromium adsorbent provide a promising and sustainable technology for the purification of high concentration Cr (VI) solution that avoids the discharge of Cr (VI) containing slag.
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危险品化学品经营许可证（带存储）