JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 10
·6833-6843
·
IF 3.5
Hailan Qin,Jianwei Zhao,Xiaoxin Chen,Hongtian Li,Shenghao Wang,Yuxiao Du,Ahmad Azmin Mohamad,Huanfu Zhou,Dawei Wang
The investigation of lead-free ceramics with exceptional piezoelectric properties holds great importance in the substitution of lead-based materials, hence promoting the development of green technology and fostering an environmentally sustainable society. This study successfully synthesized two series of Bi(Mg 2/3 Nb 1/3 )O 3 (BMN)-modified BiFeO 3 –BaTiO 3 (BF–BT) lead-free piezoelectric ceramics using the conventional solid-state reaction approach. The phase structure, microstructure, dielectric, and piezoelectric properties of these ceramics were comprehensively investigated. A typical perovskite structure is observed in all probed compositions, and the associated phase structure undergoes a gradual transition from a rhombohedral-cubic phase mixture to a cubic-dominant phase structure as increases the content of BMN and BT. All compositions exhibit obvious core–shell microstructures with inhomogeneous element distributions. Most importantly, the BF–0.30BT–0.005BMN and BF–0.34BT–0.03BMN piezoelectric ceramics presented remarkable values for the piezoelectric coefficient (225 pC/N) and converse piezoelectric coefficient (396 pm/V), respectively. These findings highlight the potential of BMN-modified BF–BT ceramics for use in high-performance piezoelectric applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Mingwang Ren,Guoqing Sun,Xiaoyu Ding,Xiaolin Yu,Li He,Shiji Xiao,Minjian Dong,Jianwen Yang,Kan Ding,Chengxin Sun
Polysaccharides are among the key bioactive components of Gynostemma pentaphyllum (Thunb.) Makino . In this study, a novel polysaccharide fraction, GPPA1-1, was isolated from G. pentaphyllum and purified using DEAE-Sepharose Fast Flow, Sephadex G-75, and Sepharose CL-6B column chromatography. GPPA1-1 was determined to have a molecular weight of 3.7 × 10 4 Da and was composed of mannose (Man), glucuronic acid (GlcA), rhamnose (Rha), glucose (Glc), galactose (Gal), and arabinose (Ara) in a molar ratio of 3.88:3.97:21.77:7.02:45.65:17.71. Comprehensive structural characterization was conducted using Congo red staining, FT-IR spectroscopy, Methylation analysis, and NMR analysis. The backbone of GPPA1-1 was identified as comprising →4)-α-Gal p- (1→, →4)-α-Gal p- (3,1→, →2)-α-Rha p- (4,1→, and →2)-α-Rha p- (1→, with branch chains containing α-Ara f -(1→, →5)-α-Ara f -(1→, →3)-α-Galp-(1→, and -α-GlcA-(1→. Biological assays demonstrated that GPPA1-1 effectively alleviates insulin resistance by inhibiting Galectin-3. This activity was confirmed through various experiments, including Galectin-3-mediated hemagglutination, Western blotting, CETSA, and glucose uptake assays. These findings highlight the potential of GPPA1-1 as a promising therapeutic agent for managing insulin resistance.
研究领域:
植物化学
·
代谢生物学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TETRAHEDRON
·
2017
·
IF 2.651
Ling-Ling Wu,Gao H. Yang,Zhi Guan,Yan-Hong He
The Rose Bengal sensitized intermolecular [2 + 2]-cycloaddition of 3-ylideneoxindoles for the synthesis of spirocyclic oxindoles was developed successfully under visible light irradiation conditions. The cycloaddition products were obtained in good yields (up to 93%) with excellent diastereoselectivity and regioselectivity by using a low loading of Rose Bengal (0.125 mol%) as a triplet sensitizer. This work demonstrates the potential benefits of Rose Bengal in visible light catalysis.
研究领域:
有机化学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2021
·
IF 0.836
Ji Yan,Zhen Li,Xiao-Kai Ma,Xin-Bo Chang,Fu-Jun Liu,Yong Zhang,Li-Zhen Wang
NASICON Na3V2(PO4)3 was investigated as cathode material in hybrid ion batteries using Li as counter and LiPF6 as electrolyte. The highly efficient and homogeneous heating merits of microwave irradiation facilitates the Na3V2(PO4)3 achieving excellent crystal structure, uniform carbon coating, as well as ideal particle size. After microwave irradiation, a specific capacity of 96.5 mAh g−1 is obtained for the first intercalation of lithium ion into Na3V2(PO4)3 at 0.1 C rate. For long-term cycling stability, the capacity retention reaches 84.4% at 5 C rate after 500 cycles. The unique intercalation/extraction characteristic promises Na3V2(PO4)3 an ideal candidate material for next-generation hybrid ion storage system.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 6
·1-7
·
IF 5.479
Xiong Huayu,Wang Bei,Wen Wei,Zhang Xiuhua,Wang Shengfu
Water-soluble cadmium telluride quantum dots capped with 3-mercaptopropionic acid were synthesized and further modified with 3-aminophenylboronic acid to form boronic acid-functionalized quantum dots (QDs). Under excitation at 350 nm, the modified QDs display yellow fluorescence with a peak at 566 nm. On exposure to copper(II), the fluorescence of the QDs is quenched. Under optimal conditions, fluorescence drops linearly in the 0.01 to 20 μM Cu(II) concentration range, and the detection limit is 7.6 nM. This fluorescent probe was applied to the determination of Cu(II) in spiked human serum and water samples and gave satisfactory results.
Schematic presentation of the principle for fluorometrice detection of copper(II) based on the use of boronic acid-functionalized cadmium telluride quantum dots (CdTe QDs).
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ChemSusChem
·
2021
·Vol. 14
·期 16
·3382-3390
·
IF 8.928
Ting Feng,Jing Ding,Haiyan Li,Wei Wang,Bohua Dong,Lixin Cao
Graphical In hot water : CeO 2 /A−Fe(OH) 3 composites synthesized by a secondary water bath at 100 °C exhibit superior photocatalytic activity. A−Fe(OH) 3 increases specific surface area, passivates the surface of CeO 2 , and reduces the activation energy of water oxidation. This work provides a new insight into exploring amorphous cocatalysts to enhance photocatalytic O 2 evolution activity and augment the possibility of overall water splitting based on CeO 2 . Noble-metal-free composites with good photocatalytic property are of great interest. Here, CeO 2 nanorods composites loaded with amorphous Fe(OH) 3 cocatalyst were designed and prepared via a secondary water bath at 100 °C. The as-synthesized CeO 2 /amorphous Fe(OH) 3 composites exhibited superior light photocatalytic activities compared to pure CeO 2 , especially the sample with a loading time of 60 min. The photocatalytic oxygen generation rate could reach to 357.2 μmol h −1 g −1 , and the average apparent quantum yield (AQY) was 24.67 %, which was a 5.5-fold increase compared to the CeO 2 sample. The improvement of photocatalytic performance could be ascribed to three main reasons: First, loading the amorphous Fe(OH) 3 enlarged the specific surface area and passivated the surface of the pristine CeO 2 . Second, the amorphous Fe(OH) 3 ,which acted as a cocatalyst, provided many active sites, and reduced the reaction activation energy. Thirdly, the maximum interface with intimate contact between CeO 2 and amorphous Fe(OH) 3 cocatalyst accelerated the photogenerated charge separation efficiency and thus improved the photocatalytic performance of CeO 2 in photocatalytic water oxidation.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Yin Zhen-Hua,Liu Xiao-Peng,Wang Jin-Mei,Xi Xue-Feng,Zhang Yan,Zhao Rui-Lin,Kang Wen-Yi
Pleurotus placentodes, a fungus, belongs to the Pleurotaceae family. The aim of the present study was to characterize the structure of a novel polysaccharide from fruiting bodies of P. placentodes (PPp-W) and evaluate its anticoagulant activity in vitro. The high-performance liquid chromatography and GC–MS analysis indicated that PPp-W with a molecular weight of 27.4 kDa was mainly composed of mannose (17.56%), glucose (6.37%), galactose (44.89%), and fucose (1.22%) with a certain amount of 3-O-methyled galactose. SEM, XRD, and AFM combined with Congo red test revealed that PPp-W was an irregular curly sheet with triple-helix conformation. The FT-IR, methylation, and nuclear magnetic resonance analysis indicated that PPp-W contained→6)-α-D-Galp-(1→, →6)-3-O-Me-α-D-Galp-(1→and →2, 6)-α-D-Galp-(1→ as main chain, partially substituted at O-2 and O-6 by non-reducing ends of β-D-Manp-(1→ and β-L-Fucp-(1→ with a small amount of α-1,3-linked-Glcp in backbone. PPp-W could significantly prolong APTT (12.9 ± 0.42 s, p < 0.001) and thrombin time (39.9 ± 0.28 s, p < 0.01) compared with the control group (11.45 ± 0.071 s and 38.05 ± 0.21 s), which showed that PPp-W had anticoagulant activity. These studies suggested that PPp-W was a 3-O-methylated heteroglycan and might be suitable for functional foods and natural drugs as an anticoagulant ingredient, which provided a basis for the application of polysaccharides from P. placentodes.
研究领域:
真菌学
·
生物化学
·
药理学
✓ 已验证
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2024
·
IF 1.3
Dandan Liang,Weili Hou,Ying Zhang,Jihua Shang,Haibo Ren,Yufeng Sun
Due to the prevailing energy shortages, the pursuit of new alternative energy sources is becoming increasingly urgent. Hydrogen production through water electrolysis has emerged as a crucial method. However, the sluggish four-electron reaction in the oxygen evolution reaction (OER) remains the primary rate-limiting step. In this study, we synthesized a heterostructure La(OH) 3 @CuO-P material on the nickel foam (NF) substrate. The experimental results demonstrate that after phosphating treatment, the heterostructure La(OH) 3 @CuO-P exhibits exceptional catalytic performance with only 215 mV overpotential, a Tafel slope value of 79.36 mV/dec, and a bilayer capacitance of 39.02 mF/cm 2 at a current density of 10 mA/cm 2 for OER in a 1 M KOH solution. These values are significantly superior compared to those obtained using heterostructure La(OH) 3 @CuO alone which showed an overpotential value of 365 mV at a current density of 10 mA/cm 2 . Moreover, during cyclic voltammetry testing for up to 500 cycles, La(OH) 3 @CuO-P also demonstrates relatively stable performance. Analyses suggest that composite heterostructure effectively addresses issues such as insufficient conductivity of La(OH) 3 and monomer aggregation tendency for CuO while maintaining excellent properties for each component. By incorporating P atoms as dopants, the interaction between La, Cu, and P atoms not only facilitates fine-tuning of the electronic structure and optimization of the adsorption free energy (-OH), but also promotes an increase in catalytic active sites through sample size reduction, thereby further augmenting the performance of the OER.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Peng Zu,Haoning Li,Guangming Yan,Gang Zhang
In this study, Ti 3 C 2 T x layers with an average lateral size of approximately 8.3 μm were prepared. The LLM composite membranes synthesized from these layers not only possessed long and narrow mass transfer channels but also further prevented the generation of internal non-selective defects. Additionally, a strategy of compositing these Ti 3 C 2 T x layers and Al(OH) 3 was adopted. The strategy contributed to expanding the interlayer distances of the composite membranes and adjusting the in-plane stacking order, thereby facilitating the construction of mass transfer channels characterized by high permeance within the membranes. This resulted in the preparation of LLMA membranes. Among these LLMA membranes, the LLMA-1:7 composite membranes displayed outstanding performance in the sieving process. Their permeances were more than 10 times higher than those of the LLM membranes (with a thickness of 1 μm). Also, the rejection ratio for CV dye could even exceed 99 %, and the operational stability was also significantly improved. These advantages enabled them to avoid some of the shortcomings commonly found in two-dimensional (2D) separation membranes to a certain extent. In summary, the LLMA-1:7 composite membranes designed in this study demonstrated superior overall performance, compared to the majority of the previously reported 2D membranes. This research is expected to establish a solid foundation for the application of 2D MXene membranes in the field of water treatment.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF NATURAL COMPOUNDS
·
2019
·Vol. 55
·期 6
·1080-1084
·
IF 0.567
Yu Pan,Li Dong-dong,Ni Jun-jun,Xia Chao-jie,Wang Zhen-zhong,Xiao Wei,Ding Gang,Zhao Lin-guo
Four novel betulinic acid (BA) derivatives modified at the C-3 position were prepared by the Mitsunobu reaction and subsequently evaluated for antitumor activity against four common cancer cell lines in vitro. The results from the MTT assay revealed that the four tested compounds showed remarkable cytotoxic activity against four cancer cell lines, much better than BA. Western blotting results indicated that the four compounds, especially compound 2c , caused a significant up-regulation expression of the caspase-12 in CT26 cell. Our results showed that configuration inversions of chiral C-3 of BA could also produce BA derivatives with potent antitumor activity.
研究领域:
药理学
·
肿瘤学
·
有机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Gao-Shang Wang,Hong-Yu Chen,Guang-Xin Feng,Yang Yuan,Zhi-Li Wan,Jian Guo,Jin-Mei Wang,Xiao-Quan Yang
Omega-3 polyunsaturated fatty acids (n-3 FAs) are essential nutrients and are considered effective in improving human health. Recent studies highlight the importance of the combination of n-3 FAs and polyphenols for limiting the oxidation of n-3 FAs and exhibiting synergistic beneficial effects. Herein, we developed a novel formulation technology to prepare oleogels that could be used for the codelivery of n-3 FAs and polyphenols with high loading efficacy and oxidative stability. These oleogels are made from algal oil with polyphenol-enriched whey protein microgel (WPM) particles as gelling agents via simple and scalable ball milling technology. The oxidative status, fatty acid composition, and volatiles of protein oleogels during accelerated storage were systematically assessed by stoichiometry and gas chromatography–mass spectrometry. These results showed that protein oleogels could overcome several challenges associated with the formulation of n-3 oils, including long-term oxidative stability and improved sensory and textural properties. The protein oleogel system could provide an excellent convenience for formulating multiple nutrients and nutraceuticals with integrating health effects, which are expected to be used in the care of highly vulnerable populations, including children, the elderly, and patients.
研究领域:
食品科学
·
营养学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2023
·
IF 2.3
Run-Ze Yuan,Peng-Fei Cui,Guo-Xin Jin
Herein, we describe the synthesis of a series pincer-type half-sandwich complexes containing selective B(3)-H activation of m -carborane. Four pincer-type complexes containing Cp*M (M = Ir/Rh) and (η 6 -pcym)Ru metal-corner, ionic Cp*M[ m -C 2 B 10 H 9 (CS 2 CH 3 ) 2 ](CF 3 SO 3 ) (M = Ir ( 2 ), Rh ( 3 )), (η 6 -pcym)Ru[ m -C 2 B 10 H 9 (CS 2 CH 3 ) 2 ](CF 3 SO 3 ) ( 4 ) and neutral solvolysis product Cp*Ir[ m -C 2 B 10 H 9 (CS 2 CH 3 )(COS)] (Complex 5 ), have been prepared. The addition reaction of MeO − toward 2 3 and 4 causes the formation of moderately stable neutral unsymmetrical pincer-type complexes Cp*M{ m -C 2 B 10 H 9 (CS 2 CH 3 )[CS(SCH 3 )(OCH 3 )]} (M = Ir ( 6 ), Rh ( 7 )) and (η 6 -pcym)Ru{ m -C 2 B 10 H 9 (CS 2 CH 3 )[CS(SCH 3 )(OCH 3 )]} ( 8 ). The substitution reaction of 2 3 and 4 have also been also explored, unsymmetrical chelate complexes Cp*M( t BuNC)[ m -C 2 B 10 H 9 (CS 2 CH 3 ) 2 ](BPh 4 ) (M = Ir ( 9 ), Rh ( 10 )) can be obtained by using t BuNC and NaBPh 4 . All of these complexes have been characterized, including X-Ray single crystal diffraction, NMR spectroscopy, IR spectroscopy and elemental analysis methods.
研究领域:
无机化学
·
配位化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）