Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
He Chun-Ting,Yu Li-Hong,Liu Haiming,Wang Qing,Ye Zi-Ming,Zhang Jia,Wang Li-Dong,He Mei-Qian,Zhang Xue-Feng,Du Hong-Gang,Lu Zi-Wei,Yang Jian,Huang Hai-Hua,Chen Xiao-Ming
Covalently bonded metal-free electrocatalysts exhibit significant potential for sustainable energy technologies, yet their performances remain unsatisfactory compared with metal-based catalysts. Herein, we propose an all-organic electrocatalyst, MEC-2, that conforms to the infrequent oxide path mechanism in alkaline oxygen evolution reaction through post-oxidation modification. MEC-2 achieves an intrinsic overpotential of 257.7 ± 0.6 mV at 10 mA·cm −2 and possesses durability with negligible degradation over 100,000 CV cycles or 250 h of operation at 1.0 A·cm −2 , being comparable to the advanced metal-based OER electrocatalysts. The 18 O-labeled operando characterization and theoretical calculations unveil that post-oxidation modification enhances the electron affinity to OH intermediates, and adjusts the adsorption configuration and proximity distance of O intermediates, thereby promoting direct O−O radical coupling. In this work, we show a fresh perspective for understanding the role of non-metallic elements/functional groups in electrocatalysis, and to a certain extent, narrows the gap between all-organic electrocatalysts and metal-based electrocatalysts.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-14
·
IF 15.7
Cao Yuanming,Tan Ji,Sun Tingting,Deng Yechuan,Zhang Min,Guan Shiwei,Zhang Xianming,Wei Chao,Huo Panpan,Zhuo Mingpeng,Zhu Hongqin,Qiu Jiajun,Liu Xuanyong
Hydrovoltaic technologies that generate electricity by absorbing or transferring free water without chemical reactions have been explored as potential candidates for renewable energy. Self-powered flexible sensors, including hydrovoltaic fibers, are becoming an important research direction in the field of renewable energy. However, integrating sensing and power generation in functional fibers remains challenging due to the need to regulate water movement to achieve performance differences. Here, we present a gas-liquid two-phase flow spinning method, inspired by spider multimodal spinning, that uses bubble-triggered spinning-liquid deformation to fabricate hollow, solid spindle, and ratchet tooth-shaped fibers. These structures alter water adsorption and transfer behaviors, making them suitable for targeted applications in hydrovoltaic devices for energy and sensing fields. Shaped fibers prepared from alginate-bridged MoS₂ enable a wide range of hydrovoltaic applications. The obtained fiber has a power density of 2.18 mW/cm 3 , stable operation at 2.1 V for 43 hours, and sensitivity of 9.36 mV/RH%/s, leading to the development of smart masks for nasal cycle monitoring, diagnosis, and therapy as potential applications. Spinning materials were extended to materials such as carboxymethyl cellulose, polyvinyl alcohol, etc., inspiring the design of structure-responsive hydroelectric materials and advancing textile electronics.
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Science China-Materials
·
2025
·
IF 7.4
Wang Xin,Lin Yidian,Chen Yinye,Zuo Jiachang,Wang Xiuyun,Luo Yongjin
Ethyl acetate (EA) is a stable oxygenated volatile organic compound (VOC) that is challenging to fully degrade due to its strong chemical bonds. High-entropy metal oxides (HEOs) with their active lattice oxygens and diverse metal–oxygen bonds hold great potential for efficient degradation of EA. However, synthesizing HEOs without phase separation remains a significant challenge. In this study, we developed an electrospinning method to synthesize spinel-type high-entropy (CoMnNiFeZn)O x catalysts, achieving 90% EA conversion at 266 °C with a CO 2 selectivity of 100%. The catalyst demonstrated a high turnover frequency of 101.5 ± 0.8 h −1 based on the total metal content. The optimal 1 mmol-HEO catalyst demonstrated excellent stability in both five-cycle and thermal stability tests. An 18 O isotope-labelled experiment confirmed that the oxidation of EA follows the Marsvan-Krevelen mechanism, with high lattice oxygen mobility significantly enhancing catalytic activity. Furthermore, in situ diffuse reflectance infrared Fourier transform spectroscopy provided insights into the roles of different metal–oxygen bonds in the catalytic mechanism. This work deepens the understanding of metal–oxygen bond interactions in the oxidation of oxygenated VOCs and offers a viable approach for synthesizing HEOs.
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Journal of Sustainable Metallurgy
·
2024
·Vol. 10
·期 4
·2630-2645
·
IF 2.5
Wu Zi-wang,Wang Lai-xin,Li Jing-wei,Lin Yin-he,Wang Da-long,Zhang Lin,Fan Yu-hang,Tang Wen-ming,Chen Hong-sheng
Vanadium titanomagnetite (VTM) is a complex polymetallic symbiotic mineral dominated by iron, titanium, and vanadium. Iron extraction from VTM is an issue for the utilization of Vanadium titanomagnetite concentrate. In this work, flotation method combined with magnetic sorting was proposed to separate and recover the iron resources from VTM. The reverse cationic flotation of iron ore in VTM was carried out with polyetheramine (PEA, molecular weight of 2000) as collector, and the differences of iron grade and recovery in VTM with different particle sizes were studied. The magnetic separation result shows that the iron grade of the magnetic part is 28.38% with the particle size 100–74 μm, which is 10% higher than the iron grade of the raw ore. The flotation results of magnetic separation products show that PEA-2000 can effectively separate and recover iron from VTM. The iron grade of the magnetic part is increased to 47.27% after flotation process at particle size 100–74 μm, pulp pH 4, PEA-2000 concentration 1 × 10 −4 mol/L, and pulp concentration 10 g/L. The mechanism of flotation separation of Fe from VTM by PEA-2000 was analyzed by zeta potential test, FT-IR test, and XPS test. PEA is adsorbed on the surface of silicate in VTM by electrostatic adsorption and hydrogen bond adsorption, and the iron phase minerals are mutually repulsive, which realizes the separation of iron. The model of iron separation by flotation of PEA-2000 was established. Graphical
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Zhou Yin,Yin Kun,Huang Yingying,Li Jiapei,Zhu Anquan,Lin Dewu,Gan Guoqiang,Zhang Jianfang,Liu Kai,Zhang Tian,Liu Kunlun,Luan Chuhao,Yang Huawei,Chen Hou,Guo Shaojun,Zhang Wenjun,Hong Guo
Charge overpotential for oxygen evolution reaction is a crucial parameter for the energy conversion efficiency of lithium-oxygen (Li-O 2 ) batteries. So far, the realization of low charge overpotential via catalyst design is a grand challenge in this field, which usually exceeds 0.25 V. Herein, we report an orbital reconstruction strategy to significantly decrease the charge overpotential to the low 0.11 V by employing PdCo nanosheet catalyst under a low-loading mass (0.3 mg/cm 2 ) and capacity (0.3 mAh/cm 2 ). Experimental and theoretical calculations demonstrate that the precise d-d orbital coupling ( d xz - d xz , d yz - d yz and d z 2 - d z 2 ) between the low-electronegativity Co and Pd leads to the reconstruction of Pd 4 d orbitals in PdCo nanosheets, thereby resulting in a downward shift of all the three active Pd 4 d orbitals ( d z 2 , d xz and d yz ) relative to that of Pd nanosheets. Furthermore, the highest energy level of the Pd 4 d z 2 orbital in PdCo is lower than the lowest energy levels of the Pd 4 d xz and 4 d yz orbitals in pure Pd, significantly decreasing the charge activation energy and achieving a highest energy conversion efficiency of 91%. This finding provides the orbital-level tuning into rational design of highly efficient electrocatalysts for Li-O 2 batteries.
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JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 4
·1-18
·
IF 2.8
Liu Ziqun,Yu Yunwu,Yuan Yong,Jiang Bin,Liu Changwei,Wang Junhai,Li Ting,Liu Peng,Ma Ying,Fang Yanfeng,Sun Xiaowei
Based on previous studies, we prepared ultrafiltration membranes by cross-linking PEEKWC/PEI using a non-solvent induced phase separation method, this membrane has excellent hydrophilicity. We also incorporated silica (SiO 2 ) into the cross-linked membrane system through distribution blending in this study. The membranes underwent characterization using various methods including SEM, ATR-FTIR, and water contact angle tests. To assess the impact of silica addition on membrane performance, tests were conducted on pure water flux, dye flux, dye retention, salt solution flux, salt-dye mixed solution flux, and retention. The results indicated a noticeable improvement in the hydrophilicity of the membrane following the addition of silica, as evidenced by a reduction in the hydrophilic angle from 22.175° to 6.271°, pure water flux up to 850 LMH at 0.3 MPa. Moreover, the retention performance of the membrane was enhanced, with the Congo red solution reaching a retention rate of 99.9% at 0.3 MPa pressure. Subsequently, a fixed silica ratio was chosen (2wt%), and different ratios of silane coupling agent were added using the distribution blending method to explore their effects on membrane performance. The tests revealed an improvement in the retention performance, the group with the largest change in the Congo Red cut-off rate, with an increase in the Congo Red cut-off from 88.7% to 97.9%.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-21
·
IF 10.6
Li Fupeng,Mao Zhiyuan,Du Yun,Cui Yuehan,Yang Shengbing,Huang Kai,Yang Jian,Li Zhuoyuan,Liu Yihao,Gu Jinlou,Wang Danru,Wang Chen
Excessive production of reactive oxygen species (ROS) and inflammation are the key problems that impede diabetic wound healing. In particular, dressings with ROS scavenging capacity play a crucial role in the process of chronic wound healing. Herein, Zr-based large-pore mesoporous metal–organic frameworks (mesoMOFs) were successfully developed for the construction of spatially organized cascade bioreactors. Natural superoxide dismutase (SOD) and an artificial enzyme were spatially organized in these hierarchical mesoMOFs, forming a cascade antioxidant defense system, and presenting efficient intracellular and extracellular ROS scavenging performance. In vivo experiments demonstrated that the SOD@HMUiO-MnTCPP nanoparticles (S@M@H NPs) significantly accelerated diabetic wound healing. Transcriptomic and western blot results further indicated that the nanocomposite could inhibit fibroblast senescence and ferroptosis as well as the stimulator of interferon genes (STING) signaling pathway activation in macrophages mediated by mitochondrial oxidative stress through ROS elimination. Thus, the biomimetic multi-enzyme cascade catalytic system with spatial ordering demonstrated a high potential for diabetic wound healing, where senescence, ferroptosis, and STING signaling pathways may be potential targets. Graphical Abstract
Schematic diagram showing the proposed mechanism that S@M@H NPs promoted diabetic wound healing
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CELLULOSE
·
2024
·Vol. 31
·期 10
·6517-6533
·
IF 4.9
Li Qingyi,Zong Yakun,Jiang Yuanzhang,Zhang Jun,Zhao Ruifang,Chen Jianming,Shi Yidong,Tan Lin
Cotton fabrics are widely used in clothing, packaging, and medical applications because of their excellent comfort, breathability, and low cost. However, it poses a threat to use them in specific scenarios, where flame retardance and antibacterial activity are highly desired. In this work, we propose the functionalization route by using layer-by-layer assembly of polyethyleneimine (PEI), phytic acid (PA), iron (Fe 3+ ), and aluminum (Al 3+ ) ions on cotton fabrics. Interestingly, the modified cotton fabric showed good biocompatibility in the cell viability (> 70%) and hemolysis (< 3%) test. In addition to biocompatibility, the antibacterial performance was largely improved for the modified cotton fabric with the antibacterial efficacy of > 99% due to the presence of Fe 3+ and Al 3+ that work in a synergistic manner. In term of flame retardance, the modified cotton fabric exhibited self-extinguishing characteristics in vertical burning experiments, with the Limiting Oxygen Index (LOI) of 35.0%. The excellent flame-retardant property was further supported by the results in cone calorimetry test, thermal gravimetric analysis, and TG-IR test, elucidating the underlying mechanism that rapid formation of dense char layer by the thermal decomposition of PEI/PA/FeAl system is effective to prevent the spreading of flame and thus protect the cotton from burning. This work provides a strategy to achieve multifunctionality on cotton fabrics, which may inspire the design on other types of fabrics or materials for extended applications.
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JOURNAL OF MOLECULAR MEDICINE-JMM
·
2025
·
IF 4.2
Wen Xin,Peng Yuefeng,Yang Wenqing,Zhu Yuzhong,Yu Fan,Geng Li,Wang Xianfeng,Wang Xiaoyan,Zhang Xiaodong,Tang Yi,Feng Lei,Zhou Tingting,Jia Hongliang,Yang Liu
Transient receptor potential canonical 1 (TRPC1) channel, a Ca 2+ -permeable ion channel widely expressed in vasculature, has been reported to be involved in various cardiovascular disorders. However, the pathophysiological function of vascular smooth muscle cell (VSMC)-derived TRPC1 in hypertension and hypertensive cardiovascular remodeling remains to be defined. In this study, we found increased TRPC1 expression in both angiotensin II (AngII)-treated VSMCs and aortas from AngII-infused mice. VSMC-specific TRPC1 deficiency strikingly attenuated AngII-induced vasoconstriction, hypertension, vascular remodeling, and cardiac hypertrophy. Mechanistically, AngII activated enhancer of zeste homolog 2 (EZH2) to stimulate TRPC1 expression, induced calcium influx and phosphorylation of mitogen-activated protein kinase/extracellular signal-regulated kinase (MEK-ERK), which in turn triggered VSMC proliferation and migration and exacerbated hypertension and cardiovascular remodeling. Treatment with EZH2 inhibitor reduced VSMC proliferation and migration and alleviated vasoconstriction and hypertension in AngII-infused mice. Together, we revealed the pathogenic role of the EZH2-TRPC1-MEK/ERK pathway in AngII-induced hypertension and cardiovascular damage. TRPC1 or EZH2 inhibition may represent a desirable therapeutic target for the treatment of hypertension. Key messages
AngII activates AT1R-EZH2-TRPC1 pathway in VSMCs and aortas of hypertensive mice.
TRPC1 promotes VSMC proliferation and migration via MEK/ERK signaling.
Inhibition of TRPC1 or EZH2 alleviates hypertension and cardiovascular remodeling.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 5
·1-13
·
IF 5.3
Li Ruidan,Tian Li,Song Yujia,Guo Yanjia,Ma Guangping,Han Pengfei,Jiang Hanyue,Wang Wenzhuo,Lu Juan
The self-supporting material Zn3Cu2O2 was synthesized through the methods of electrospinning combined with high-temperature calcination. A novel sensitive electrochemiluminescence (ECL) sensor based on Zn3Cu2O2 and CdTe@MWNTs was constructed by the multi-step amplification strategy. First, Zn3Cu2O2 and CdTe served as the ECL groups to construct the sensor, yielding a larger signal of the sensor in the presence of the co-reactant K2S2O8. Multi-walled carbon nanotubes (MWNTs) were introduced as a carrier to increase the signal value of the sensor further. The synergistic action of CdTe@MWNTs and Zn3Cu2O2 made the system obtain the maximum initial signal. With the addition of Allure Red (AR), the ECL signal decreased. The quenching phenomenon was not only due to the large organic molecule AR occupying the active sites of Zn3Cu2O2 and CdTe, but also, more importantly, because the sensor existed as an ECL-RET mechanism between CdTe and AR. The response mechanism and experimental conditions of the system were also investigated. Under optimal conditions, the sensor showed a linear relationship between the ECL signal change and the logarithm of AR concentration in the range 1.0 × 10−14 to 1.0 × 10−6 mol L−1, the linear equation was ∆I = 15,295.54 + 956.42 log CAR, and the correlation coefficient was 0.9928. The lowest detection limit of (S/N = 3) was 1.67 × 10−15 mol L−1. Satisfactory results were obtained for the analysis of beverages.
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JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 4
·1-11
·
IF 2.8
Liang Miaoqing,Guan Fanglan,Zhang Mei,Nie Jinmei,Bao Lihong
Self-healing materials have gained significant attention due to their ability to autonomously repair damage, extending material lifespan. In this study, bio-based self-healing polyurethanes were synthesized using modified castor oil (MCO) as the soft segment and 5-(2-hydroxyethyl)- 6-methyl- 2-aminouracil (UPY) and 2,2'-diaminodiphenyldisulfide (DTDA) as dynamic components. The synergistic effect of quadruple hydrogen bonding and disulfide bonds was investigated by varying the n(UPY)/n(DTDA) ratio. Structural and mechanical properties were characterized using IR, DSC, TGA, XRD, and tensile testing. The results revealed that the castor oil-based polyurethanes exhibited transparency and amorphous structures, making them promising bio-based self-healing materials. When the DTDA content was 9.54% and the UPY content was 1.62%, the material achieved a self-healing efficiency of 96.38% under 80 °C for 12 h. Additionally, at a DTDA content of 6.65% and a UPY content of 2.43%, the tensile strength reached 17.76 MPa. Mechanistic analysis revealed that disulfide bonds played a dominant role in self-healing, while hydrogen bonds provided additional reinforcement. This work presents a novel bio-based polyurethane system with tunable mechanical and self-healing properties, contributing to the development of sustainable smart materials.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Li Zhen,Guo Guizhang,Yu Zhou,Ma Zengyue,Yu Libo
In the pursuit of highly efficient hydrogen production through photoelectrochemical water splitting, expanding the utilization of the visible spectrum and extending the lifetime of photogenerated electrons are crucial challenges for improving the efficiency. To address these challenges, we prepared CdS sensitized TiO 2 photoanodes using a one-step hydrothermal method, employing thioglycolic acid (TGA) and mercaptopropionic acid (MPA) as linkers. The successful synthesis of CdS QDs and the CdS/TiO 2 photoanode was confirmed through various characterization techniques, including transmission electron microscopy (TEM), X-ray diffraction, and scanning electron microscopy. Performance evaluations revealed that the TGA-decorated CdS/TiO 2 photoanode exhibited superior photocurrent density and stability compared to the MPA-modified counterpart. Notably, its applied bias photo-to-current conversion efficiency was 1.7 times greater than that of the MPA-modified CdS/TiO 2 photoanode. Furthermore, UV–visible absorption spectrum analysis demonstrated that the incorporation of CdS QDs significantly broadened the spectral response of the TiO 2 photoanode, extending it from the ultraviolet to the visible range. This enhancement is crucial for improving light harvesting capabilities. Additionally, our analysis of electron lifetime indicated that the shorter molecular chains of TGA effectively minimize the transfer distance for photogenerated electrons from the CdS QDs to the TiO 2 , resulting in improved electron lifetimes and, consequently, enhanced photocurrent density.
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