Journal of Materials Chemistry A
·
2026
·
IF 9.5
Wei Peng,Zhengran Chen,Chenming Gu,Ziao Xing,Bing Wang,Ruihong Liang
The high-entropy concept has emerged as a promising strategy for designing ferroelectric ceramics with superior piezoelectric properties. To clarify the role of equal-valence B-site cations within this framework, we synthesized a series of PNN–PMeN–PT (Me = Sc, In, Lu) ceramics. When Sc³⁺, In³⁺, and Lu³⁺ were introduced in equimolar proportions, the piezoelectric coefficient (d₃₃) increased from 938 pC/N to 1012 pC/N, aligning with high-entropy predictions. However, the maximum d₃₃ value of 1046 pC/N was achieved by deviating from this ratio, specifically with a higher fraction of smaller Sc³⁺ and a lower fraction of larger Lu³⁺. Analyses based on both Landau theory and fluctuating local polarization theory reveal that this asymmetric ionic ratio further enhances the distortion of piezoelectric functional cells, leading to the optimal performance. Electrical characterization and piezoresponse force microscopy confirm that the outstanding properties originate from a synergistic design: a globally disordered matrix established via multi-cation doping, augmented by local structural heterogeneity tuned through the Sc³⁺/Lu³⁺ ratio. Our findings highlight that advancing ultrahigh piezoelectricity systems requires deliberate engineering of the local piezoelectric functional cells.
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DOI
高影响因子
Advanced Healthcare Materials
·
2026
·
IF 9.6
Hai Zhou,Chaoyang Huang,Yanqi Chen,Tingzi Zhao,Fengyi Zhu,Gong Jun,Jinrong Zhang,Yingsong Pan,Qiulan Wen,Lei Yang,Huihui Zhang,Lianglong Chen
Diabetic wounds are characterized by persistent inflammation, impaired angiogenesis, and susceptibility to infection, posing significant clinical challenges. Here, we report an intelligent shape-memory sponge (P 1 A 3 @B-MOF) engineered for the programmable modulation of the diabetic wound microenvironment. The dressing consists of an interpenetrating network of oxidized pullulan and acellular dermal matrix, incorporating zeolitic imidazolate framework-8 (ZIF-8) metal–organic frameworks encapsulated with salvianolic acid B (SalB) via in situ self-assembly. This design enables exudate-triggered shape recovery and pH-responsive drug release, targeting the acidic pathological environment. We demonstrate that the released Zn 2+ and SalB exert synergistic effects: conferring broad-spectrum antibacterial activity, orchestrating macrophage repolarization from proinflammatory M1 to regenerative M2 phenotypes, and activating the hypoxia-inducible factor 1-alpha (Hif-1α)/vascular endothelial growth factor (VEGF) pathway to restore vascularization. In a diabetic rat model, the sponge accelerated wound closure with a 98.5% healing rate by day 14 and modulated collagen deposition via the transforming growth factor-β (TGF-β)/Smad signaling axis, thereby effectively mitigating scar formation. This integrated strategy offers a promising modality for restoring immune homeostasis and promoting functional skin regeneration.
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121282
·
IF 7.2
Zijian Zhang,Bonan Liu,Li Yang,Jingwen Wang,Yuqing Dong,Chao Tang,Ping Wang,Haijiao Xie,Lei Zhang,Lu Zhang,Jun Zhao,Yu Fan,Wangjing Ma
Polystyrene (PS) waste recycling remains a critical challenge due to its high energy consumption and limited monomer yield. Herein, the b-ZnO catalyst with a few in-situ formed Zn sites at 270 °C under microwaves enhances the depolymerization of PS waste into monomers. To further improve the PS depolymerization over the b-ZnO catalyst, a series of Zn/b-ZnO catalysts with different metal Zn contents were prepared. Among these catalysts, the optimal 5Zn/b-ZnO achieves nearly 100 wt% PS conversion, yielding up to 0.997 g −1 PS liquid products with 0.8 g −1 PS styrene monomer in five cycles of experiment under microwaves. Such process greatly reduces the energy cost as compared with the conventional thermal process (0.51 vs. 0.81 kWh) and the obtained styrene monomer mixture can be repolymerized into fresh PS to complete a closed-loop recovery (80 wt% PS waste recycled). This work builds a novel microwave-assisted Zn/b-ZnO catalyst system for depolymerizing PS waste into monomers in a highly efficient way, which sheds a light on the sustainable recovery of PS waste.
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高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2011
·Vol. 49
·期 20
·4458-4467
·
IF 3.894
Qiang Peng,Xiangju Liu,Yuancheng Qin,Dan Zhou,Jun Xu
A new series of low-bandgap copolymers based on electron-accepting thieno[3,4-b]pyrazine (TPZ) and different electron-donating aza-heteroaromatic units, such as carbazole (CZ), dithieno[3,2-b:2′,3′-d]pyrrole (TPR) and dithieno[3,2-b:2′,3′-e]pyridine (TPY), have been synthesized by Suzuki or Stille coupling polymerization. The resulting copolymers were characterized by NMR, elemental analysis, gel permeation chromatography, thermogravimetric analysis, and differential scanning calorimetry. UV–vis absorption and cyclic voltammetry measurements show that TPZ-based copolymer with TPR has the best absorption due to the strongest intramolecular charge transfer effect and smallest bandgap. The basic electronic structure of D-A model compounds of these copolymers were also studied by density functional theory (DFT) calculations. The conclusion of calculation agreed also well with the experimental results. The polymer solar cells (PSCs) based on these copolymers were fabricated with a typical structure of ITO/PEDOT:PSS/copolymer:PC 71 BM/Ca/Al under the illumination of AM 1.5G, 100 mW cm −2 . The performance results showed that TPZ-based copolymer with TPR donor segments showed highest efficiency of 1.55% due to enhanced short-circuit current density. The present results indicate that good electronic, optical, and photovoltaic properties of TPZ-based copolymers can be achieved by just fine-tuning the structures of aza-heteroaromatic donor segments for their application in PSCs. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 15
·6003-6009
·
IF 3.288
Yuhang Jiang,Qiuwan Shen,Shian Li,Guogang Yang,Naibao Huang
B-site cobalt-doped perovskite oxide BaNiO3 oxygen sorbents have been synthesized by an EDTA sol–gel method and further applied for producing oxygen. BaCoxNi1−xO3−δ oxygen sorbents were characterized by scanning electron microscopy (SEM) and cyclic oxygen adsorption/desorption experiments. Results showed that BaCo0.6Ni0.4O3−δ features higher production amounts of oxygen among the candidates. The operating factors of oxygen releasing performance were investigated in detail including adsorption temperature, desorption temperature, adsorption time, CO2 flow rate and CO2 partial pressure. It was concluded that the temperature and CO2 flow rate are the main reasons affecting the performance of perovskite oxygen sorbents. The optimal operating parameters of oxygen releasing performance for BaCo0.6Ni0.4O3−δ were as follows: adsorption temperature was 850 °C, desorption temperature was 850 °C, air adsorption time was 30 min, CO2 flow was 200 ml min−1 and the ratio of CO2/N2 was 100 : 0. The oxygen production amount of BaCo0.6Ni0.4O3−δ was 49.5 mg g−1 under the optimal reaction conditions. Finally, multiple cycles demonstrated that BaCo0.6Ni0.4O3−δ displays higher stability and regeneration capacity, which is the key factor providing a stable O2/CO2 gas stream for oxyfuel combustion application.
研究领域:
材料科学
·
无机化学
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能源化学
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化学工程
·
功能材料
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高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 15
·期 3
·2528-2538
·
IF 1.5
Wenhui Geng,Mengmeng Zheng,Dan Chen,Xianwen Wang,Zekai Zhang,Yishan Lin,Dongqin Cai,Huiqin Li,Guobo Huang,Yanxian Jin Yu,Binbin Yus
Palladium catalyst (Pd) are made attention to application in alcohol fuel cells due to unique performance, as well as the resource abundance and low cost, but the catalyst performance and stability of the catalysts are still not satisfied. In this article, the novel PdFe/B-N-G catalysts with the double element alloying and dual-doping for ethanol electro-oxidation are successfully prepared and determined by XRD, TEM and XPS. TEM results reveal a relatively uniform and high dispersion of Pd particles is observed on PdFe/B-N-G catalyst. The XPS analysis indicates that Pd(0) contents of the PdFe/B-N-G catalyst are increased on account of the B, N-doping effect. Being explored as the catalyst to the ethanol oxidation reactions, the PdFe/B-N-G catalysts exhibit the better electrocatalytic activity with higher current densities and catalyst stability compared to those of PdFe/G and Pd/B-N-G, which can be attributed to the synergistic effect of the enhanced PdFe alloying and the B, N-doping, that can produce more activity sites dispersing on the surface of graphene. Thus, the novel PdFe/B-N-G catalysts can be the potential alternate in alcohol fuel cells.
研究领域:
电化学
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纳米催化
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能源材料
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燃料电池
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表面科学
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 134
·期 10
·
IF 1.866
Fei Fang,Fan Kong,Xueqin Zhang,Mengqi Lin,Yichi Zhang,Shounian Ding
A series of amphiphilic poly(N-vinyl carbazole) (PVK) block copolymers containing tris(8-hydroxyquinoline) aluminum (Alq 3 ) have been synthesized via reversible addition-fragmentation chain transfer (RAFT) radical polymerization with trithiocarbonate terminated polyethylene glycol (PEG) as a RAFT agent. The chemical structures of the block copolymers have been identified by 1 H nuclear magnetic resonance and Fourier transform infrared spectrometer. The analysis of gel permeation chromatography indicates that the polydispersity indices of the block copolymers are lower than 1.30. The results of thermogravimetric analysis show that the decomposition temperatures of the copolymers are higher than 330 ° C . The optical properties of the copolymers have been investigated and the obviously enhanced emission from Alq 3 has been found due to resonance energy transfer from PVK to Alq 3 . © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44573.
研究领域:
高分子化学
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材料科学
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光电子学
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纳米功能材料
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聚合物合成
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荧光材料
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能量转移
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高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Yi Zhao,Chenyang Shen,Ling Ding,Jianping Liu,Weidong Xiang,Xiaojuan Liang
Cd 2+ doped CsPbBr 3 perovskite quantum dots were synthesized in borosilicate glass for the first time by traditional melting method. By X-Ray Diffraction (XRD) and high resolution electron microscopy analysis, it was proved that Cd 2+ successfully entered the perovskite lattice structure. The samples have good optical properties , high photostability, chemical stability, thermal stability and water stability. On this basis, CsPb 0.7 Cd 0.3 Br 3 QDs glass, commercial red phosphor (CaAlSiN 3 :Eu 2+ ) and blue light chip were coupled to produce white LED devices. This discovery opens up a new way for the application of metal ion-doped perovskite QDs glass in optoelectronic devices.
研究领域:
光电子器件
·
材料科学
·
纳米技术
·
光子学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.5
Xi Chen,Hang Luo,Guanghu He,Deng Hu,Fan Wang,Xiaona Li,Zhongna Yan,Dou Zhang
Electrostatic capacitors are considered the preferred candidates for high-power energy storage. The demand for electrostatic capacitors operating at high temperatures (>150 °C) has been driven by applications in electric vehicles, aerospace systems, etc. Herein, we propose a strategy of using a B–N coordination supramolecular network to construct crosslinked polymer dielectrics for improved energy storage performance at elevated temperatures and electric fields. Specifically, by incorporating 2,7-diboronic ester-9,9′-spirobifluorene (DBASBF) into the polyetherimide (PEI) matrix, B–N coordination bonds are formed between the nitrogen atoms in PEI and the boron atoms in DBASBF, leading to the formation of a supramolecular coordination network. Theoretical calculations and experimental results confirm that the formation of this supramolecular network effectively enhances mechanical robustness and suppresses charge migration. As a result, the fully organic PEI/DBASBF-0.5% composite dielectric achieves a discharged energy density of 4.52 J cm−3 at 200 °C with an energy efficiency exceeding 90%, which is increased by 139% compared with the PEI matrix and surpasses many of the currently reported polymer dielectrics. Moreover, the composite also exhibits outstanding flexibility, along with remarkable long-term reliability. This work offers a design paradigm for developing high-performance polymer dielectrics suitable for harsh environments.
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高影响因子
CATALYSIS TODAY
·
2026
·
IF 5.1
Feng-Xiao Xue,Shuang Wang,Yushuai Sang,Xiao-Qian Feng,Huan Wang,Xuelan Hou,Yong-Hua Zhao
The growing global concern over water pollution has amplified the demand for advanced, sustainable water treatment technologies. Photocatalysis offers a promising solution for effectively removing toxic organic contaminants, such as Rhodamine B (RhB), without generating secondary pollutants. However, despite the widespread use of TiO 2 -In 2 S 3 heterojunctions as photocatalysts to overcome the limitations of TiO 2 , the mechanisms behind their enhanced performance still need to be explored. In this study, a TiO 2 -In 2 S 3 photocatalyst with a heterojunction was constructed, and its enhanced photocatalytic performance was demonstrated by 90.6% degradation of RhB within 30 min, with a degradation rate constant 6.01 times that of pure TiO 2 and 4.89 times that of In 2 S 3 . Mechanistic investigations, including density functional theory calculations, revealed that hydroxyl radicals were the primary active species in the degradation process. Moreover, the TiO 2 -In 2 S 3 heterojunction enhanced the adsorption and stabilization of reaction intermediates, optimizing both reaction kinetics and selectivity. These findings highlight the potential of TiO 2 -In 2 S 3 heterojunctions as highly efficient photocatalysts for environmental remediation.
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高影响因子
Journal of Saudi Chemical Society
·
2026
·Vol. 30
·期 4
·62
·
IF 5.2
Zhang Tingyu,Cai Tingting,Yu Tanlai,Han Xiaojing,Sun Qi,Qi Guoli
This work reported on boron-, fluorine-, and nitrogen-co-doped carbon dots (B/F/N-CDs) produced via a straightforward one-step hydrothermal process, followed by a detailed characterization of their properties. The B/F/N-CDs exhibited bright visible fluorescence, which was rapidly quenched by doxycycline (DOX) through a dynamic quenching mechanism. A fluorescent sensing platform for doxycycline was established, showing good linearity within the concentration range of 0.138–0.421 mM. Satisfactory recoveries (97.79-102.77%) and low relative standard deviations (RSD ≤ 4.45%) were achieved in spiked water samples, demonstrating reliable practical applicability. Moreover, when incorporated into poly(vinyl alcohol) (PVA) films, the B/F/N-CDs reduced the second after-flame time in vertical burning tests from 9.5 s to 5.2 s, indicating improved flame-resistant performance. The results confirm that heteroatom co-doping was a viable tactic for producing multifunctional carbon dots capable of serving dual application roles.
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高影响因子
CHEMISTRY OF MATERIALS
·
2026
·
IF 7.1
Hao Deng,Jiyang Xie,Dandan Gao,Wanbiao Hu
The rich diversity of transition-metal pairs bridged by oxygen contributes to the fascinating magnetic behaviors in high-entropy oxides (HEOs), while the complex interplay between multisite lattice configurations, spin states, and magnetic exchange interactions remains yet to be explored. Here, we report the Al3+-driven octahedral site preferential occupations and tunable magnetic frustration in spinel-type [5M1/(5+x)Alx/(5+x)]3O4 (x = 0–5; M = Cr/Fe/Mn/Zn/Co) HEOs. Nonmagnetic Al3+ preferentially occupies octahedral sites (PB), which significantly distorts the lattice with expansion in tetrahedral sites while shrinkage in PB–O. This structural evolution enables tuning of magnetic properties, e.g., competition between ferromagnetic and antiferromagnetic states, spin glass, and spin-flop frustration states. Alternating-current susceptibility presents apparent spin frustration that follows a critical slowing-down model, which is suppressed when the Al3+ level is beyond x = 2 because of the weakly frozen and disordered magnetic moments. These findings bring insights into modulating magnetic exchange interactions within multiple structural complexities for designing HEOs with tunable magnetic properties.
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高影响因子
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