Science China-Materials
·
2021
·Vol. 64
·期 7
·1621-1631
·
IF 8.273
Wang Wenjie,Tian Yunfeng,Liu Yun,Abhishek Nalluri,Li Yitong,Chi Bo,Pu Jian
Sr-Co containing perovskite oxides are prospective air electrode candidates for reversible solid oxide cells (RSOCs). However, their efficiencies are limited by Sr segregation and the high thermal expansion coefficient (TEC) of Co-based perovskites. Herein, La 0.6 Ca 0.4 Fe 08 Ni 0.2 O 3− δ (LCaFN) is tailored as an Sr-Co-free perovskite air electrode for highperformance RSOCs. Compared with La 0.6 Sr 0.4 Fe 0.8 Ni 0.2 O 3− δ (LSFN) and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ (LSCoF), LCaFN has a high electrical conductivity (297 S cm −1 ), TEC compatibility (11.2 × 10 −6 K −1 ) and improved chemical stability. Moreover, LCaFN has high oxygen reduction reaction (ORR) activity with a low polarization resistance (0.06 Ω cm 2 ) at 800°C. A single-cell Ni-YSZ/YSZ/gadolinium-doped ceria (GDC)/LCaFN-GDC operated at 800°C yields a maximum power density of 1.08 W cm −2 using H 2 as fuel. In the solid oxide electrolysis cell (SOEC) mode, the cell can achieve a current density of approximately 1.2 A cm −2 at 1.3 V with 70% humidity at 800°C. The cell exhibits good reversibility and remains stable in continuous SOEC and solid oxide fuel cell (SOFC) modes. These findings indicate the potential application of LCaFN as an air electrode material for RSOCs.
研究领域:
材料科学
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能源技术
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电化学
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陶瓷学
·
燃料电池
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WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 12
·779
·
IF 2.9
Zeng Guanli,Zou Yilingyun,Feng Qi,Yang Hang,Liu Zisen,Wu Zhenbin,Zhang Yi
This study delves into the potential of vermiculite-based adsorbents for phosphate removal from aqueous solutions. CTAB and zirconium-modified natural vermiculite slices (CZV) were employed, with XRF analysis confirming successful zirconium loading. The Langmuir model indicated monolayer adsorption behavior, suggesting a preferential adsorption characteristic. The presence of coexisting ions showed varied effects on phosphate removal, with increasing CO 3 2− concentrations slightly inhibiting phosphate removal by CZV, while increasing NO 3 − , SO 4 2− , and Cl − concentrations improved phosphate removal by all adsorbents. Notably, the vermiculite adsorbents, despite their larger particle size, demonstrated a competitive adsorption capacity when compared to other adsorbents. The practicality of these adsorbents is further emphasized by their potential direct application in artificial wetlands and lakes without posing ecological risks. Moreover, the reutilization of used vermiculite adsorbents is highlighted as a sustainable approach, considering their beneficial effects on the growth of submerged macrophytes and sediment microecological environments. The adsorption mechanism is attributed to surface complexation and ligand exchange. This research underscores the efficacy of modified natural vermiculite slices in phosphate adsorption, paving the way for broader environmental applications and offering a promising solution to water purification challenges.
研究领域:
环境科学
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水处理
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吸附技术
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材料改性
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生态工程
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POLYMER BULLETIN
·
2011
·Vol. 67
·期 8
·1583-1594
·
IF 1.215
Zhang Linya,Jiao Qingze,Zhao Yun,Zhou Mingji,Feng Wei,Ge Yanrui
The dendritic polyester, dendritic maleate, and epoxy/dendritic maleate resins were synthesized and analyzed by acid value, hydroxyl value, FT-IR, TGA, and DSC. The dendritic maleate and epoxy/dendritic maleate resins were applied in UV-curable coating, and the properties of the UV-curable coatings were compared. With the introduction of epoxy resin, the epoxy/dendritic maleate resin formed larger cross linked structure and more cavities which helped to improve the properties of coating. The epoxy/dendritic maleate resin exhibited higher thermal decomposition temperature and T
g . The coating based on equal content of epoxy resin and dendritic maleate had higher gel content and better properties such as impact strength, adhesive strength, flexibility, pencil hardness, and solvent resistances. The SEM figures showed that the epoxy/dendritic maleate resin could form more cavities and improve the toughness of coating.
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Frontiers of Materials Science
·
2025
·Vol. 19
·期 2
·1-12
·
IF 2.3
Zou Fangqing,Xiao Ye,Qiao Xianshu,Tian Chuanjin,Wang Chang-An
Constructing specific noble metal/metal—organic framework (MOF) nanoheterostructures is an effective strategy for promoting water electrolysis, yet remains highly challenging due to complex synthesis methods, difficulties in structural characterization, and the demanding nature of performance optimization. In this work, a heterojunction electrocatalyst was developed through growing Ru nanoparticles on NiFe-MOF nanosheets (NSs) supported by nickel foam (NF) using an easily accessible solvothermal method followed by an annealing strategy. Owing to the electronic interaction between Ru nanoparticles and NiFe-MOF NSs, the optimized Ru@NiFe-MOF/NF catalyst exhibits excellent bifunctional performance for the hydrogen evolution reaction (with an overpotential of 84 mV at 10 mA·cm −2 ) and the oxygen evolution reaction (with an overpotential of 240 mV at 10 mA·cm −2 ) in a 1.0 mol·L −1 KOH solution, which is superior to that of commercial catalysts. This study highlights a promising strategy for designing and developing efficient electrocatalysts for overall water electrolysis.
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Chinese Medicine
·
2026
·Vol. 21
·期 1
·40
·
IF 5.7
Yao Qianfang,Hu Guishan,Yin Can,Wu Anguo,Hu Guangqiang,Qin Dalian,Zhou Xiaogang,Law Betty Yuen-Kwan,Du Xi,Chen Li,Li Jianqiao,Lin Hong,Long Xin,Wu Jianming,Yu Lu
Background Cerebral ischemia/reperfusion injury (CI/RI) remains a critical barrier to effective ischemic stroke (IS) treatment. While mitophagy activation has been shown to attenuate apoptosis and pyroptosis, thereby ameliorating CI/RI, the therapeutic potential of natural compounds targeting this pathway remains underexplored. Penthorum chinense Pursh (PCP), a traditional hepatoprotective herb, contains Thonningianin A (TA), a bioactive compound with reported autophagic properties. However, the role and mechanisms of TA in CI/RI mitigation remain unclear. Methods In vivo, a middle cerebral artery occlusion/reperfusion (MCAO/R) rat model was established to evaluate TA’s neuroprotective effects via TTC staining, Longa neurological scoring, and immunofluorescence staining. In vitro, oxygen–glucose deprivation/reoxygenation (OGD/R)-treated HT22 and BV2 cells were used to assess TA’s impact on cell viability (MTT, Hoechst/PI staining), mitochondrial oxidative stress (DHE, TMRM, JC-1, Mito-Tracker staining and Western blot), apoptosis (flow cytometry, immunofluorescence staining, Hochest and PI staining and Western blot), and pyroptosis (EthD-2/YO-PRO-1 staining and Western blot). Autophagy and mitophagy modulation was investigated using rapamycin (Rap), 3-MA (autophagy inhibitor), CCCP (mitophagy inducer), and AC220 (mitophagy inhibitor) in EGFP-LC3-U87 and mCherry-GFP-FIS1-293T cells. Co-localization immunofluorescence and Western blotting were employed to validate PINK1/Parkin pathway involvement. Results TA administration significantly improved neurological function, reduced cerebral infarct volume, and attenuated neuronal damage in MCAO/R rats. In vitro, TA suppressed OGD/R-induced mitochondrial oxidative stress and apoptosis in HT22 cells while mitigating pyroptosis in BV2 microglia. Mechanistically, TA activated PINK1/Parkin-dependent mitophagy, as evidenced by enhanced LC3-II/I ratio, and increased mitochondrial-autophagosome co-localization. Crucially, TA’s anti-apoptotic and anti-pyroptotic effects were abolished upon mitophagy inhibition. These findings were corroborated in the MCAO/R model, where TA upregulated PINK1/Parkin signaling and mitigated cell damage. Conclusion This study identifies TA as a novel natural agent alleviating CI/RI by activating PINK1/Parkin-mediated mitophagy, thereby concurrently suppressing apoptosis and pyroptosis. These findings provide the first elucidating the molecular mechanis underlying TA's potential as a therapeutic candidate for IS. Graphical
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高影响因子
Light-Science & Applications
·
2026
·Vol. 15
·期 1
·61
·
IF 23.4
Lv Xulong,Duan Tianyi,Fang Shaofan,Wang Zhaofeng,Chen Dongxun,Huang Lipeng,Liu Huanyu,Liu Zheming,Liu Chao,Wang Xiao-Jun,Liang Yanjie
Flexible mechanoluminescence (ML) elastomers show significant potential for next-generation wearable electronics, artificial skin, advanced sensing, and human-machine interaction. However, their broader application has been hindered by challenges such as restricted emission wavelengths, inadequate repeatability, insufficient cyclic stability, and poor self-recovery. Here, we report an innovative and high-performance solar-blind ultraviolet ML elastomer by combining commercial polydimethylsiloxane (PDMS) and newly fabricated Sr 3 (BO 3 ) 2 :Pr 3+ phosphors, capable of generating intense ultraviolet-C (UVC) ML peaked at 272 nm under mechanical stimulation. The composite elastomer exhibits exceptional repeatability and cyclic stability, maintaining detectable UVC emission over 10,000 continuous stretching cycles (power intensity at the 1st cycle is ~6.2 mW m −2 ). It also demonstrates rapid and efficient self-recovery behavior, restoring 43.2% of its initial intensity within 1 s and 90.2% after 24 h. Combined experimental and theoretical analyses reveal that interfacial triboelectrification, involving electron transfer from the phosphor to the PDMS matrix, leads to the observed UVC ML emission. Leveraging the solar-blind nature and high photon energy of UVC light, we further demonstrate the feasibility of self-powered photonics applications. This work not only offers novel insights into the design of advanced UVC ML systems but also provides “power-free” solutions for important applications where UVC photons are essential, such as outdoor optical tagging and microbial sterilization.
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APOPTOSIS
·
2026
·Vol. 31
·期 1
·41
·
IF 8.1
Cao Zhu,Yang Shizhou,Zou Jian,Jin Ye,Zhang Yanan,Chen Tingting,Shen Yuanming
Cervical cancer (CC) remains a significant global health challenge. A deeper understanding of the molecular mechanisms driving CC progression is crucial for developing improved therapeutic strategies. CSN5 is vital in cell functions and cancer, but its role in CC is unclear. This study aims to explore CSN5’s role and its target gene in CC progression, assessing their potential as therapeutic targets. We employed an integrated approach combining bioinformatics analysis, proteomic profiling, and in vitro and in vivo functional assays. Immunohistochemistry was used to analyze CSN5 and ENO3 expression in CC and normal tissues. CSN5 upregulation was associated with advanced clinical stage and poor differentiation. Furthermore, CSN5 overexpression enhanced cellular proliferation and glycolytic metabolism but, paradoxically, suppressed migration, invasion, and the epithelial-mesenchymal transition (EMT). These pro-tumorigenic effects were confirmed in vivo, and the glycolytic inhibitor 2-DG was found to reverse the phenotypes induced by CSN5. Protein sequencing highlighted ENO3’s role in CSN5-mediated tumorigenesis, regulating EMT and glycolysis by stabilizing its ubiquitination degradation through CSN5. Crucially, silencing ENO3 attenuated the oncogenic effects of CSN5 both in vitro and in vivo. Our findings unveil a novel mechanistic paradigm in which CSN5 promotes CC progression by co-opting ENO3 to enhance glycolytic flux while concurrently suppressing cell motility. This study not only deepens the understanding of CC pathogenesis but also identifies the CSN5-ENO3 axis as a promising target for novel therapeutic interventions. Graphical abstract
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Science China-Chemistry
·
2026
·
IF 9.7
Huang Chunmei,Pang Xuan,Li Fuming,Cao Shumei,Pan Shilie,Mutailipu Miriding
Nonlinear optical (NLO) and birefringent crystals are pivotal for advancing photonic technologies, enabling critical functions from laser frequency conversion to quantum information processing. To address the pressing need for miniaturized devices with enhanced optical anisotropy, we strategically select 5-hydroxy-2-pyridinecarboxylic acid (C 6 H 5 NO 3 ), a low-toxicity, cost-effective organic molecule featuring a pyridine-derived π -conjugated system marginally expanded beyond benzene, as NLO functional motif. This molecular design incorporates dual-functional OH/COOH groups that synergistically extend π -delocalization within the planar six-membered ring and provide two anionic states ([C 6 H 4 NO 3 ] − and [C 6 H 3 NO 3 ] 2− ), facilitating diverse supramolecular assemblies with alkali/alkalineearth metal ions. Through confined assembly optimization, we discovered a crystal Na 2 (C 6 H 3 NO 3 )·H 2 O, which achieves an excellent ultraviolet (UV) NLO performance: phase-matched second harmonic generation (SHG) intensity (14.0 × KH 2 PO 4 (KDP) at 1064 nm, the highest among planar mono-six-membered-ring systems), giant birefringence (0.487 at 546 nm), and a UV cutoff edge (321 nm). Multimodal analyses confirm the planar organic anion [C 6 H 3 NO 3 ] 2− as the origin of these exceptional optical responses, where ionic bonding and N–O/N layer confinement enforce optimal alignment.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 3.9
Liu Jia,Meng Qingxu,Liu Xiaona,Xie Yunrui
Developing high-performance TENG based on electrospun nanomaterials is one key to maximize the value as a sustainable green energy technology. Here, a performance-enhanced TENG is constructed by using electrospun TPU/Tb(BA) 3 phen/PVP nanofiber membrane and PVDF/PVP nanofiber membrane as two friction layers. A “dual-enhancement strategy” is proposed and implemented: a lot of micro contact points are created by utilizing the nanofiber membrane network structure to greatly increase the effective contact area and significantly enhance the frictional electrification effect. Meanwhile, a multitude of triboelectric charge capture sites are obtained via Tb(BA) 3 phen-TPU/PVP two-phase interface that is established by doping functional filler of Tb(BA) 3 phen to reduce charge dissipation and increase the accumulation of frictional charges. As the content of Tb(BA) 3 phen increases from 0 to 15% in TPU/Tb(BA) 3 phen/PVP nanofiber membrane, the output performance of TENG gradually increases from 3.3 μA, 50 V to 10.1 μA, 200 V. Moreover, electrospun nanofiber membranes are endowed with rich properties, including good flexibility, stretchability, hydrophobicity, and fluorescence. The assembled TENG with high performance and excellent multifunctional integration has great potential in wearable electronic devices and energy harvesting. Graphical abstract
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Nature Communications
·
2026
·
IF 15.7
Guo Yijia,Yin Mengran,Gao Han,Ou Wennan,Wu Pu,Liu Chenshuaiyu,Xia Siyu,Zheng Xuntian,Luo Haowen,Hong Jiajia,Guo Jinyan,Wang Enzuo,Wen Jie,Liu Runnan,Zhou Dong,Zhao Lu,Li Zhi,Liu Jinhuo,Xie Jin,Li Ludong,Lin Renxing,Tan Hairen
Replacing volatile methylammonium (MA + ) with formamidinium (FA + ) or cesium (Cs + ) cations in mixed Pb-Sn perovskite compositions improves thermal resilience. Nevertheless, the low-solubility Cs-based perovskite tends to preferentially crystallize into a dense Cs-rich surface layer during the AS-assisted crystallization process, which impedes the AS to extract the internal solvent. Here, we introduce a multi-Lewis-base modulator to maintain sustained solvent-extraction channels (SSC) open throughout the AS process, thereby homogenizing MA-free mixed Pb-Sn perovskite crystallization in depth. This approach yielded a PCE of 22.7% in FACs Pb-Sn perovskite solar cells. We fabricated monolithic all-perovskite tandem solar cell with a high PCE of 29.2% (certified PCE of 29.2%), which is the highest certified PCE for MA-free all-perovskite TSCs. The unencapsulated FACs-based mixed Pb-Sn perovskite solar cell remained over 80% of its initial PCE after 800 h of aging at 85 °C. This strategy enables the simultaneous realization of high-performance and thermal stability.
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Science China-Chemistry
·
2026
·
IF 9.7
Wang Yuchen,Zheng Yong,Shi Wenjie,Zhong Dichang,Lu Tongbu
Photocatalytic hydrogen evolution using solar energy is a promising approach for sustainable energy conversion, yet homogeneous metal cluster catalysts often suffer from instability and inefficient charge separation. Herein, we report a confinement strategy by embedding bimetallic trinuclear Fe 2 M (M = Co, Ni, Zn) clusters into a thiazole-based covalent organic framework (COF). The resulting COF@Fe 2 M hybrids combine the redox activity of metal clusters with the photoactive and porous architecture of COFs. Among them, COF@Fe 2 Co exhibits the highest activity, achieving 93.16 mmol g
−1 co
h −1 of H 2 in a 10 h irradiation, 5.8 times that of the physical mixture. Spectroscopic and electrochemical studies reveal efficient interfacial charge transfer, while density functional theory (DFT) calculations show that the Fe 2 Co cluster has the most favorable electronic structure and hydrogen adsorption energy. This work offers a rational platform for designing efficient hybrid photocatalysts.
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NATURE
·
2026
·Vol. 649
·期 8096
·353-359
·
IF 48.5
Geng Shitao,Yuan Bin,Zhao Xiaoju,Xu Qiuchen,Wang Yan,Ouyang Zhaofeng,Tang Shanshan,Wang Shuo,Zhang Chengxiao,Chen Qianyun,Liao Meng,Wang Bingjie,Zhao Chen,Jin Weihua,Li Zichuang,Ye Tian-Nan,Gong Xueqing,Peng Huisheng,Sun Hao
Room-temperature sodium–sulfur (Na–S) batteries offer a sustainable energy storage solution to conventional lithium (Li)-based systems 1 , 2 , 3 , owing to the high element abundances and theoretical electrochemical performance 4 , 5 . However, their practical applications have been severely hindered by the low discharge voltages and the need for largely excessive Na metal anode 6 , 7 , 8 . Here we report a 3.6 V class Na–S battery featuring a high-valence sulfur/sulfur tetrachloride (S/SCl 4 ) cathode chemistry and anode-free configuration. We show that sodium dicyanamide (NaDCA) can simultaneously unlock reversible S/SCl 4 conversion and Na plating/stripping in a non-flammable chloroaluminate electrolyte. This design enables the maximum energy and power densities of 1,198 Wh kg −1 and 23,773 W kg −1 , respectively, calculated on the basis of the total electrode mass including both the cathode and the anode. Also, we demonstrate facilitated S/SCl 4 conversion by incorporating a bismuth-coordinated covalent organic framework (Bi-COF) catalyst (8 wt% loading) into the S cathode, which realizes an impressive discharge capacity of 1,206 mAh g (sulfur+catalyst) −1 , contributing to a maximum energy density of 2,021 Wh kg −1 calculated on the basis of the total electrode mass. With an estimated cost of US$5.03 per kWh and excellent scalability, our anode-free Na–S battery shows promise in grid energy storage and wearable electronics.
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