MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2019
·
IF 2.722
Guo-quan Ma,Fu-sheng Liu,Sheng Wang,Zeng-chao Dang,Jia-wei Zhang,Xiao-jie Fu,Mei-shun Hou
A serial of Bi 2 S 3 /3DOM-TiO 2 (x-BS/3D-Ti, x denotes as the weight percentage of Bi 2 S 3 , x = 5, 10, 15, 20 and 25 wt%) were fabricated and their physico-chemical properties were characterized with the utilization of XRD , SEM, UV–Vis DRS and XPS . The photocatalytic performance was investigated based on photocatalytic degradation of rhodamine B (RhB) solution under simulated solar irradiation . The mechanisms for enhancing the photocatalytic activity and the degradation of RhB occurring on the BS/3D-Ti surface were discussed. The results indicated that 20-BS/3D-Ti exhibited the highest photocatalytic performance among the prepared samples. Although good adsorption property of BS/3D-Ti for RhB could promote the degradation of RhB, effective separation between photoinduced electron and hole was the key influencing factor compared to adsorption. The slightly reducing in the photocatalytic degradation rates after multiple cycles was caused by the adsorption of the oxidation intermediate product of RhB on the surface of BS/3D-Ti, which decreases the absorption of light.
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高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 2.1
Chao-Chao Teng,Yan Guo,Ke Cao,Han-Bo Yang,Qi-Jia Jiang,Dao-Yong Zhu,Shao-Hua Wang
A palladium catalyzed selective arylation of B(4)-H of 9-amide- o -carborane with potassium aryltrifluoroborate has been developed. A series of B(4)-Ar-B(9)-amide- o -carborane derivatives decorated with diverse active groups have been synthesized with moderate to good yields as well as excellent selectivity. This work represents an unprecedented protocol for selective arylation of o -carboranes with potassium aryltrifluoroborates.
研究领域:
有机化学
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金属有机化学
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药物化学
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材料科学
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DOI
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POLYMER DEGRADATION AND STABILITY
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2014
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IF 2.633
Weidong Zhou,Yajie Zhang,Ying Xu,Pingli Wang,Li Gao,Wei Zhang,Junhui Ji
Poly(butylene furandicarboxylate)-b-poly(tetramethylene glycol) (PBF-PTMG) copolymers were synthesized from 2,5-furandicarboxylic acid (FDCA), 1,4-butanediol (BDO) and poly(tetramethylene glycol) (PTMG, the M n is 1000 g/mol) through a process of esterification and polycondensation . The copolymers were characterized by 1 H NMR, GPC , DSC , POM, XRD , TGA and tensile strength measurements. The weight content of PTMG segments in the copolymers was 19.7%, 39.4% and 59.6% respectively, and their M w ranged from 59,300 to 85,900 g/mol. By combining the results of DSC, POM and XRD , they were block copolymers built up of crystallized PBF segments as the hard blocks and amorphous PBF and PTMG segments as the soft blocks, and the two segments were miscible in amorphous phase . As the content of PTMG segments increased, the glass transition temperature ( T g ), the melting temperature ( T m ), the crystallization temperature ( T c ) and the crystallization ability of these copolymers decreased gradually, while their crystal structure changed little. For mechanical properties, the copolymers exhibited the characteristics of elastomers , showing good stress at break (16–26 MPa) and outstanding elongation at break (381–832%). The copolymers had greatly enhanced elasticity and flexibility properties as the content of PTMG segments increased, and the thermal annealing enhanced their tensile properties due to the more crystallinity and better regularity of PBF segments. Moreover, the TGA results revealed that PBF-PTMG copolymers had excellent thermal stability. Therefore, as novel bio-based copolymers, they might find applications in thermoplastics as well as elastomers .
研究领域:
高分子科学
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材料化学
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可持续材料
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生物聚合物
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聚合物合成与表征
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高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2013
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IF 1.7
Longlong Chang,Weiwei Wang,Pingsheng Huang,Zesheng Lv,Fuqiang Hu,Jianhua Zhang,Deling Kong,Liandong Deng,Anjie Dong
Novel biodegradable core-crosslinked nanoparticles (CNPs) consisting of methoxy poly(ethylene glycol)-block-poly(ϵ-caprolactone-co-γ-cinnamoyloxy-ϵ-caprolactone) (mPEG-b-P(CL-co-CCL)) were prepared and evaluated for paclitaxel (PTX) delivery. mPEG113-b-P(CL65.2-co-CCL10.1) had a higher drug loading efficiency (95%) compared to mPEG113-b-PCL93.1 (43%). The stability of NPs has been largely improved and PTX release was significantly inhibited by crosslinking via UV irradiation at λ = 254 nm. MTT assays demonstrated that both blank non-crosslinked and crosslinked NPs showed low cytotoxicity to NCL-H460 cells while PTX-loaded non-crosslinked and crosslinked NPs exhibited obvious cytotoxicity against NCL-H460 cells, and the cytotoxicity was both dose-dependent and time-dependent. Furthermore, after 48 h incubation the cell viability of PTX-loaded crosslinked NPs was lower compared to that of PTX-loaded non-crosslinked NPs or free PTX. These properties indicated that CNPs prepared from mPEG-b-P(CL-co-CCL) have great potentials as carriers for drug delivery.
研究领域:
药物递送
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纳米医学
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高分子化学
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生物材料
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药剂学
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International Journal of Applied Ceramic Technology
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2020
·Vol. 17
·期 4
·1629-1635
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IF 1.762
Meihua Hu,Ning Bi,Mingming Liu,Shangsheng Li,Taichao Su
TiB 2 –B 4 C composites were in situ synthesized and consolidated by high pressure synthesis method from a mixture of TiC and B powders at the pressure and temperature of 5.0 GPa and 1500℃-1900℃. The phase composition, microstructure, density, hardness, thermal conductivity, and electrical resistivity of TiB 2 –B 4 C composites were analyzed. As the increase in the synthesis temperature, the products were TiB 2 and B 4 C phases and that crystallinity improved. TiB 2 –B 4 C composites were dense without obvious pores. TiB 2 –B 4 C composites synthesized at 1800℃ obtained the optimized performance, including the relative density of 98.2%, the Vickers hardness of 31.7 ± 1.2 GPa with the load of 9.8 N, the thermal conductivity of 30.3 ± 0.7 W/(m K), and the electrical resistivity of 3.3 × 10 −3 Ω cm, respectively. The grain size of the TiB 2 –B 4 C composites changed with the increase in synthesis temperature, leading to the changes in hardness, thermal conductivity, and electrical resistivity.
研究领域:
材料科学
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陶瓷
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高压处理
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复合材料
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DOI
高影响因子
International Journal of Electrochemical Science
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2023
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IF 1.5
Xiaoping Zhang,Bo Shao,Lijun Yan,Yaping Lu,Mingxuan Zhao,Xiaoli He,Xuerui Li,Wei Sun
By using cyclic voltammetric method a pyronine B (PB) and graphene (GR) copolymer was electrochemical formed on carbon molecular wire electrode (CMWE) to get the working electrode (named as PB-GR/CMWE). The synergistic functions of PB and GR resulted in the excellent electrochemical performances with higher conductivity and lower interfacial resistances. Voltammetric behaviors of quercetin on PB-GR/CMWE were investigated by cyclic voltammetry, which gave a pair of well-defined redox response in pH 5.0 phosphate buffer solution. Under the selected conditions, the oxidation peak currents were in linear to quercetin concentration from 0.2 ~ 80.0 μmol L -1 with the detection limit as 6.37×10 -8 mol L -1 (3σ). The fabricated PB-GR/CMWE was further used to detect quercetin in compound ginkgo leaf tablets with satisfactory results.
研究领域:
电化学
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分析化学
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纳米材料
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生物传感器
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药物分析
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高影响因子
Cell Reports Physical Science
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2021
·
IF 0
Ming Shi,Hongpeng Zhou,Wenming Tian,Bin Yang,Songqiu Yang,Keli Han,Rengui Li,Can Li
Although bismuth (Bi)-based halide perovskites have attracted profound attention in photocatalysis, the undesirable photophysical properties are not well modulated, and the effect of surface structure on adsorption and activation of reactant molecules is still unclear. Here, we report the structural design, via precise incorporation of antimony (Sb) atoms into the host lattice of Cs 3 Bi 2 Br 9 , of a series of B-site bimetallic perovskites (Cs 3 Sb x Bi 2-x Br 9 , 0 ≤ x ≤ 2) with tunable band structures. The incorporation of Sb dramatically enhances the separation and transfer of photogenerated charges and prolongs their lifetimes. Considering these advantages, Cs 3 SbBiBr 9 exhibits significantly enhanced photocatalytic activities in challenging benzylic C–H activation while maintaining a high selectivity of 96%. Theoretical calculations reveal that the introduction of Sb breaks the symmetry of the local structure and leads to asymmetric charge distribution that not only increases the adsorption capacity for methylbenzene but also reduces the energy barriers for C–H bond activation.
研究领域:
材料科学
·
光化学
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DOI
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
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2015
·
IF 1.25
Xinghua Guan,Xiaoyan Ma,Hualong Zhou,Fang Chen,Zhiguang Li
Two diblock copolymers of poly(methyl methacrylate)-block-poly(styrene) with chlorine as terminal group (PMMA-b-PS-Cl) were synthesized via two-step atom transfer radical polymerization. The structures of the block copolymers were characterized by Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, and gel permeation chromatography. Thermal properties including glass transition temperature (Tg) and thermal stability were studied by differential scanning calorimetry and thermogravimetric analysis (TGA), respectively. The block copolymers of PMMA-b-PS-Cl exhibited two glass transitions, which were attributed to the Tgs of PMMA and PS segments, respectively. According to TGA, thermal decompositions of PMMA macro-initiator and PMMA-b-PS-Cl block copolymers had two stages. The weight loss ratio in the second stage was more significant than that in the first stage, which may be attributed to the separation of the halogen atom from the terminal group and the formation of a double bond. The breaking down of the backbone dominates in the second stage in which the weight loss ratio was more than 70%, represented the main stage of pyrolysis. It was found that the introduction of the PS chain remarkably enhanced the thermal stability of the copolymer, thus endowing the block copolymers high activation energy for thermal decomposition. On the other hand, the remaining two pyrolysis procedures further indicated that thermodynamic mechanism didn’t change due to the introduction of PS segments.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Xin-Bo Pang,Jing-Pei Cao,Nai-Yu Yao,Jing-Ping Zhao,Tian-Long Liu,Shi-Jie Cai,Xiao-Yan Zhao,Tungalagtamir Bold
Catalytic pyrolysis as an important pathway for the production of sustainable chemicals and fuels from biomass. However, it is still a huge challenge to significantly improve the yield of light aromatics by adjusting the structure of ZSM-5 zeolite and to fully understand its catalytic mechanism. Here, the directional preparation of ZSM-5 nanosheets with controllable b-axis thickness was achieved by controlling the amount of silicalite-1 added during the hydrothermal synthesis process. Characterization results demonstrate that the reduction in b-axis thickness greatly enhances the mass transfer process of the zeolite while enhancing the accessibility of acidic sites, thereby promoting the catalytic conversion of biomass pyrolysis volatiles to aromatic. The yield of light aromatic hydrocarbons in bio-oil is substantial increased, the bio-oil of 20-NCZ5 had the highest aromatic content with a yield of 97.1% and a yield of 135 mg/g, achieving efficient catalytic upgrading of bio-oil. Highly b-axis-oriented ZSM-5 nanosheets provide a new approach for efficient biomass utilization. Furthermore, this zeolite holds promise for broader applications in the catalytic conversion of various energy sources.
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高影响因子
Journal of Functional Foods
·
2026
·
IF 3.9
Xing Song,Chenghao Lv,Dongsheng Wang,Yuhang Yi,Jing Wen,Liu Yang,Yuling He,Wenli Yang,Tao Li,Si Qin
Proanthocyanidins (PCs) may lower blood sugar, but activity differences between A-type and B-type oligomers remain unclear. This study compared A-type (PA1, PA2) and B-type (PB1, PB2) oligomeric PCs using enzyme inhibition, molecular docking, and insulin-resistant HepG2 cells. A-type PCs exhibited stronger α-glucosidase inhibition, whereas B-type PCs showed superior α-amylase inhibitory activity. All components enhanced glucose consumption and reduced oxidative stress and inflammation. B-type PCs more potently activated the IRS-1/PI3K/Akt pathway, AMPK, and the Nrf2/HO-1/NQO1 antioxidant axis. In conclusion, A-type PCs excel in direct α-glucosidase inhibition, whereas B-type PCs play a superior role in improving insulin signaling and antioxidant defense in vitro. These findings provide a structure-activity basis for developing targeted functional products, pending in vivo validation.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yuping Hou,Ning Wang,Xiaofei Wu,Guibin Hu,Guihua Li,Shuai Cheng,Zhenyu He,Yusong Du,Jingtai Zhao
Manganese-doped calcium germanate was used as the model host to optimize dual-mode emission by synergistic regulation at the B site. A series of Ga 3+ -doped samples was first prepared to determine the composition with the strongest mechanoluminescence (ML) response. A small amount of Si 4+ was then introduced to recover the photoluminescence (PL) performance. The Ga 3+ /Si 4+ co-doping strategy combines defect construction with lattice rigidification. Heterovalent Ga 3+ substitution creates an oxygen-vacancy trap network, which preserves the energy-storage capability required for ML. Isovalent Si 4+ incorporation strengthens the lattice framework through highly stable Si-O bonds, thereby suppressing non-radiative relaxation of Mn 2+ and compensating for the defect-induced energy loss. Thermoluminescence (TL), Raman spectroscopy, and optical characterizations show that B-site regulation modifies both trap distribution and lattice rigidity. As a result, PL and ML are simultaneously improved. This work provides a structural-regulation strategy for designing multimodal luminescent materials.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Bingbing Yao,Junjun Wang,Linjing Liu,Xiaohui Tang,Honglian Cui,Ning Liu,Ming Cheng,Yuying Song,Zhe Wu,Kangle Zhou,Enxiang Hou,Yan Mu,Che Sun,Danqing Liu,Fengmin Wu
Lead-free BNT-BT piezoelectric ceramics present excellent piezoelectric properties and are non-toxic, positioning them as one of the most promising lead-free ceramic systems for industrial applications. However, the typically issue is a low depolarization temperature ( T d ). Moreover, an increase in T d is accompanied by a reduction in the piezoelectric coefficient ( d 33 ), which severely hinders the improvement of piezoelectric performance and restricts applications at high temperatures. Accordingly, (Zn 0.2 Zr 0.2 Fe 0.2 Mo 0.2 Sb 0.2 )O 2 is doped into 0.935Bi 0.5 Na 0.5 TiO 3 -0.065BaTiO 3 with the morphotropic phase boundary (MPB) through the high-entropy doping strategy in this study, to design the system of 0.935Bi 0.5 Na 0.5 (Zn 0.2 Zr 0.2 Fe 0.2 Mo 0.2 Sb 0.2 ) x Ti (1-x) O 3 -0.065BaTiO 3 . High-entropy doping at the B-site induces lattice distortion and increases defect density, thereby generating domain-wall pinning and ultimately enabling the synergistic enhancement of T d and d 33 . Notably, at x = 0.1%, d 33 reaches 200 pC/N and T d increases to 108 °C, achieving simultaneous optimization of piezoelectric performance and temperature stability. These results indicate that high-entropy doping effectively addresses the issue of simultaneous optimization encountered in conventional doping, thereby providing a novel strategy to achieve synergistic optimization of T d and d 33 .
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