INORGANIC CHEMISTRY
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2024
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IF 4.3
Yue Yan,Wenrui Wu,Yang Yang,Tao Xu,Xianfu Li
The rational collocation and construction of multiphase composite electrode materials with ingenious structures is a key strategic to enhance the electrochemical performance of supercapacitors (SCs). Within this project, a unique Co9S8@CoAl-LDH/NF core–shell heterostructure consisting of CoAl-LDH/NF ultrathin nanosheets sturdily attached to Co9S8/NF needle-like nanorods is grown in situ on self-supported conductive substrate nickel foam (NF) by an effortless and productive multistep hydrothermal method. The construction of the core–shell structure can effectively enhance the capacitive properties as well as the mechanical strength of the material. Compared with the single-component materials Co9S8/NF (1769.6 mF cm–2 and 91.6%) and CoAl-LDH/NF (858 mF cm–2 and 85.2%), the Co9S8@CoAl-LDH/NF composites have excellent capacitance properties (5052.4 mF cm–2) along with exceptional capacitance retention (5000 cycles) 98.5% even after undergoing charging and discharging. Furthermore, the asymmetric SCs fabricated with Co9S8@CoAl-LDH/NF and AC/NF exhibit an energy density of 0.17 mWh cm–2 at 3.20 mW cm–2. Therefore, the innovative core–shell heterostructure of Co9S8@CoAl-LDH/NF presented in this study holds immense practical potential as a groundbreaking electrode material in the realm of SCs.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Dong Wang,Fengqin Tang,Hui Bai,Pengju Wu,Yaju Zhang,Lingyun Fang,Beibei Sun,Chunhui Shi,Libing Hu
The fabrication of advanced electrocatalysts for urea-assisted electrolytic water splitting is of great significance for yielding green hydrogen. In this study, Ce doping a quaternary sea urchin like medium-entropy NiCoFe layered double hydroxide (Ce 1.2 -NiCoFe-LDH) nanoshe et s were obtained by employing a doping engineering strategy. Characterization experimental results confirmed that Ce dopants could modify the oxygen vacancy structure of NiCoFe-LDH, accelerating charge and mass transfer. thereby enhancing the urea decomposition. The electrochemical results indicated that Ce 1.2 -NiCoFe-LDH demonstrated high-efficiency catalysis for UOR, characterized by high intrinsic activity, rapid kinetics, and robust durability. The overpotential of Ce 1.2 -NiCoFe-LDH was only 48 mV at the current density of 10 mA cm −2 , much lower than the commercial IrO 2 (126 mV at 10 mA cm −2 ). The tafel slope of Ce 1.2 -NiCoFe-LDH (62 mV dec −1 ) was also better than those of IrO 2 (88 mV dec −1 ) and NiCoFe-LDH (99 mV dec −1 ). Compared with the commercial IrO 2 , the Ce 1.2 -NiCoFe-LDH exhibited a change of only 3.2 % after a 12-hour chronoamperometric test, indicating an improvement in stability. Impedance comparison between the two hydrotalcites revealed that Ce 1.2 -NiCoFe-LDH possessed lower impedance, potentially enhancing catalytic efficiency. Therefore, this work illustrates that the modulation of oxygen vacancies in electrocatalysts, induced by the heteroatom doping effect, can enhance the electrocatalytic oxidation performance of small molecules for hydrogen production.
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Materials
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2018
·Vol. 11
·期 5
·836
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IF 2.467
Tianxiang Li,Zhengren Shi,Xianru He,Ping Jiang,Xiaobin Lu,Rui Zhang,Xin Wang
With the aim of improving the anti-aging properties of nitrile-butadiene rubber (NBR), a functional organic filler, namely LDH–SAS, prepared by intercalating 4-amino-benzenesulfonic acid monosodium salt (SAS) into layered double hydroxides (LDHs) through anion exchange, was added to nitrile-butadiene rubber (NBR), giving the NBR/LDH–SAS composites. Successful preparation of LDH–SAS was confirmed by XRD, TGA and FTIR. LDH–SAS was well dispersed in the NBR matrix, owing to its strong interaction with the nitrile group of NBR. The obtained NBR/LDH–SAS composites exhibited excellent thermo-oxidative aging resistance as shown by TGA-DSC. Further investigation by ATR-FTIR indicated that SAS can capture the radical groups, even during the aging process, which largely accounts for the improved aging resistance.Keywords:layered double hydroxides (LDHs);nitrile-butadiene rubber (NBR);4-Amino-benzenesulfonic acid monosodium salt (SAS);thermal oxidative aging resistance properties
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EUROPEAN JOURNAL OF PHARMACOLOGY
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2024
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IF 4.2
Ya-Ling Chen,Yi Wang,Qiu-Yu Fang,Tong Wang,Cong Chen,Tong-Yao Gao,Ming Wu,Wei-Ping Zhang,Yun-Bi Lu
Poly (ADP-ribose) polymerase-1 (PARP-1) activity significantly increases during cerebral ischemia/reperfusion. PARP-1 is an NAD + -consumption enzyme. PARP-1 hyperactivity causes intracellular NAD + deficiency and bioenergetic collapse, contributing to neuronal death. Besides, the powerful trigger of PARP-1 causes the catalyzation of poly (ADP-ribosyl)ation (PARylation), a posttranslational modification of proteins. Here, we found that PARP-1 was activated in the ischemic brain tissue during middle-cerebral-artery occlusion and reperfusion (MCAO/R) for 24 h, and PAR accumulated in the neurons in mice. Using immunoprecipitation, Western blotting, liquid chromatography-mass spectrometry, and 3D-modeling analysis, we revealed that the activation of PARP-1 caused PARylation of hexokinase-1 and lactate dehydrogenase-B, which, therefore, caused the inhibition of these enzyme activities and the resulting cell energy metabolism collapse. PARP-1 inhibition significantly reversed the activity of hexokinase and lactate dehydrogenase, decreased infarct volume, and improved neuronal deficiency. PARP-1 inhibitor combined with pyruvate further alleviated MCAO/R-induced ischemic brain injury in mice. As such, we conclude that PARP-1 inhibitor alleviates neuronal death partly by inhibiting the PARylation of metabolic-related enzymes and reversing metabolism reprogramming during cerebral ischemia/reperfusion injury in mice. PARP-1 inhibitor combined with pyruvate might be a promising therapeutic approach against brain ischemia/reperfusion injury.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Xu Ma,Xinhe Zhao,Ning Zhang,XiaoYu Liu,JiYue Ding,Qingyang Xu,Ke Cui,Yi Wang,Qian Zhang,Hailin Cong
The development of antimicrobial packaging materials serves as an effective means to enhance food preservation and mitigate food waste. This study had developed a near-infrared (NIR)-controlled smart responsive system for the release of antibacterial cinnamon essential oils (CEO), which involves immobilizing CEO within the interlayer of layered double hydroxides (LDHs) and decorating it with graphene oxide (GO), designated as LDH@CEO-GO. LDH@CEO-GO was prepared by co-precipitation method. The release kinetics of CEO at various temperatures was investigated, revealing that the release dynamics conform to the Fickian diffusion mechanism. Under NIR light serves as an intelligent switch that can regulate temperature, thereby facilitating the release of CEO. Antibacterial tests demonstrated that LDH@CEO-GO exhibited good antibacterial properties, achieving inhibition rates of 77.5 % and 68.3 % against E. coli and S. aureus, respectively. NIR irradiation, the inhibition rates increased to 98.3 % and 97.2 %. Through practical exploration of strawberry preservation, it was found that under NIR light stimulation, LDH@CEO-GO can effectively enhance the preservation of strawberries.
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RENEWABLE ENERGY
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2024
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IF 9
Ping Bai,Junyu Lang,Yinshu Wang,Haojie Tong,Zelin Wang,Bingbing Zhang,Yiguo Su,Zhanli Chai
Exploration of effective and renewable photocatalysts is essential for solar to hydrogen conversion technologies. However, the application of some photocatalysts with great potential, such as ZnCdS, are seriously limited by the sluggish charge transfer/separation and unavoidable light corrosion. In this work, Au/ZnCdS/NiCo-LDH ternary heterojunction was constructed by introducing Au nanoparticle mediator in core-shell ZnCdS/NiCo-LDH, which exhibits an enhanced H 2 production rate of 4.89 mmol g −1 h −1 under visible light irradiation and unexpected recyclability with 6.2 % rate reduction after 15 consecutive cycles. The enhanced photocatalytic performance is attributed to the dual pathways (Z-scheme and localized surface plasmon resonance) enabled in Au/ZnCdS/NiCo-LDH, which improves the separation of photo-generated carriers, accelerates the electron transport, and provides active sites for photocatalytic oxidation. This work provides a promising technology to jointly improve photocatalytic activity and stability by modulating the interfacial carrier dynamics of photocatalysts.
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Journal of Magnesium and Alloys
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2025
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IF 13.8
Zexuan Yang,Yazhou Wang,Xia Lin,Yongjin Zou,Cuili Xiang,Fen Xu,Lixian Sun,Yong Shen Chua
Magnesium-based hydrogen storage materials, such as MgH 2 , have attracted considerable attention because of its superior hydrogen storage capacities, inexpensive, and excellent reversibility. However, their high thermodynamic stabilities and slow kinetics lead to relatively high desorption temperatures, which severely limit the wide application of MgH 2 . In this study, the inclusion of vanadium induced the formation Ni-Co metal–organic frameworks (MOF) from a NiCo layered double hydroxide (LDH), thereby increasing the number of defects and vacancies, and improving the hydrogen storage properties of MgH 2 . The synthesized NiCo-MOF/V-O-doped MgH 2 system demonstrates excellent hydrogen storage capacity. More specifically, 5 wt.% of H 2 was released over 20 min at a relatively low dehydrogenation temperature of 250 °C, and almost complete dehydrogenation was achieved at 300 °C for 5 min. In addition, at 125 °C, the hydrogen storage material absorbed 5.5 wt.% H 2 in 10 min. Furthermore, the activation energy of dehydrogenation was determined to be 69.588 ± 6.302 kJ ·mol −1 which is significantly lower than that of the ball-milled MgH 2 (i.e., 118.649 ± 2.825 kJ ·mol −1 ). It was therefore inferred that during dehydrogenation process, a Mg 2 Ni/Mg 2 NiH 4 hydrogen pump is formed by Ni, while the V-H and Co-H bonds formed by Co and V during the reaction act synergistically to catalyze the absorption and desorption of hydrogen, thereby increasing the hydrogen storage capacity of MgH 2 . These experiments provide new perspectives on the commercial application of MgH 2 .
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Wei Zhao,Yinan Xu,Yuehui Qiao,Rui Sun,Jie Qian,Yixue Wang,Quan Liu,Zhekun Shi,Fandong Meng,Xiaoli Zhan,Qinghua Zhang
Zeolites have been widely utilized in the adsorption of volatile organic compounds (VOCs) due to their high specific surface area and robust stability. However, the adsorption capacity of zeolites for VOCs is considerably reduced under humid conditions due to the competitive adsorption between water and VOCs, thereby limiting their industrial applicability. Herein, we report a core–shell ZSM-5@NiAl-LDH (Z-L) composites designed specifically for efficient adsorption of VOCs under high humidity conditions. The core–shell architecture is achieved by introducing active sites onto the ZSM-5 framework pretreated with high-alkalinity agents, followed by the growth of NiAl-LDH on its surface, creating a regular, vertically staggered structure. Compared with ZSM-5 zeolite, Z-L composites show a larger specific surface area, wider pore size, and larger mesopore volume, allowing a high adsorption capacity of the VOCs. Contact angle and static adsorption tests of water molecules reveal that the LDH shell effectively increases the hydrophobicity of Z-L composites. The dynamic adsorption behavior for m-xylene demonstrates that Z-L composites exhibit significantly enhanced adsorption capacity, 3.79 times that of ZSM-5 zeolite. Furthermore, Z-L composites exhibit a higher selectivity for m-xylene at 60 % relative humidity, achieving a Q wet /Q dry ratio of 86.7 %, outperforming most porous adsorption materials. Kinetic model analysis reveals that the augmentation of mesopores in Z-L composites enhances the effective diffusion space for synthesized samples, resulting in exceptional adsorption performance. This novel synthetic material is anticipated to be a promising candidate for VOCs pollution control in high-humidity environments.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Yuyin Dai,Hongguang Zhao,Ri Sa,Qiuyu Lin,Yinghua Li
Enhancing the efficiency of layered nickel-cobalt double hydroxides (NiCo-LDH) as electrode materials represented a promising strategy for advancing supercapacitor technology and improving energy storage systems. However, achieving optimal synthesis conditions and addressing the inherent limitations of NiCo-LDH remained critical challenges. In this study, we developed a novel hydrothermal approach to fabricate ultrathin NiCo-LDH nanosheets with a highly porous architecture. In the present study, we have introduced a hydrothermal methodology aimed at the fabrication of ultrathin NiCo-LDH nanosheets characterized by an intricate and highly porous architecture. This innovative approach entailed the simultaneous deposition of nickel and cobalt hydroxides in the presence of ammonium fluoride, a technique that not only streamlined the synthesis process, but also markedly augmented the electrochemical performance of the resultant material. These effects collectively contributed to improved electron transport and structural stability. The optimized NiCo-LDH-18 electrode achieved an exceptional specific capacitance of 2266.6 F g⁻ 1 and an energy density of 104.8 W h kg⁻ 1 , with a remarkable 93.19 % capacitance retention after 40,000 cycles. Additionally, the potential window of the system closely approximated its theoretical maximum, reaching 96.88 % at a current density of 10 A g⁻ 1 . This refined synthesis strategy offered a significant advancement in supercapacitor performance and stability. By overcoming the inherent drawbacks of traditional supercapacitors, the developed materials provided an effective solution for meeting the growing demand for storage devices with high energy density.
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Small
·
2025
·
IF 12.1
Yongping Qu,Huajun Zhou,Yuzhen Zhang,Peihua Zhao,Kai Yuan,Rui Zhou,Hui Gao,Yanzhong Wang
Seawater electrolysis is a promising route for hydrogen production. However, the elevated concentration of Cl − in seawater can cause the serious corrosion of electrode materials, which limits the large-scale application of seawater splitting for the generation of green hydrogen. Herein, nickel iron layered double hydroxide@Ag/iron foam (NiFe-LDH@Ag/IF) composites are synthesized using a two-step method at room temperature. The introduction of Ag not only induces the electron density redistribution of NiFe-LDH to promote the formation of NiFeOOH as the catalytically active sites, but also impress the corrosion of chloride ions during the seawater oxidation. The as-prepared NiFe-LDH@Ag/IF only requires a low overpotential of 255 mV at a current density of 500 mA cm −2 in alkaline solution, and it can stably operate for 1000 h without degradation. Importantly, the formed AgCl nanoparticles loaded on the surface of NiFe-LDH nanosheets can effectively prevent the corrosive effect of Cl − during the seawater oxidation process. Thus, NiFe-LDH@Ag/IF can maintain high catalytic activity and work stably for 1000 h at high current density of 500 mA cm −2 for seawater oxidation. This study presents a simple method for preparing self-supported electrocatalysts with excellent corrosion resistance and high catalytic activity in alkaline seawater oxidation.
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Advanced Healthcare Materials
·
2025
·
IF 9.6
Hongwei Xu,Shuairu Zhu,Walaa Al-Mathagi,Mei Yang,Wanding Cui,Xiaohua Yuan,Xuping Sun,Yonggang Wei,Binwu Ying
Primary liver cancer remains a significant global health challenge, with the majority of patients diagnosed at an unresectable stage, further complicated by liver dysfunction due to cirrhosis. To address these clinical hurdles, nanozyme-based catalytic therapy has emerged as a promising strategy. However, its therapeutic efficacy is often limited by self-protective mechanisms associated with the tumor microenvironment (TME), particularly the overexpression of glutathione (GSH) and hypoxia-induced metabolic adaptation. In this study, a quaternary medium-entropy layered double hydroxide (LDH) nanozyme, denoted as NiFeMnCu-LDH is developed. This nanozyme exhibits peroxidase-like, catalase (CAT)-like, and oxidase-like activities, facilitating the cascade generation of reactive oxygen species (ROS). Simultaneously, the oxygen produced by CAT mitigates hypoxia, while the glutathione peroxidase-like activity drives the depletion of tumor antioxidants, effectively reprogramming the TME. Further in vitro experiments demonstrated that efficient production of ROS and scavenging of GSH induced substantial apoptosis in liver cancer cells. Additionally, mouse liver tumor models showed robust inhibition of tumor growth without systemic toxicity. This findings provide a framework for the precise engineering of nanozymes in advanced liver cancer treatment, addressing critical barriers within the TME and offering valuable insights into a mimetic multi-enzyme synergy for translational applications.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Saiya Guo,Huihui Li,Manman Shi,Qianqian Zhu,Jieding Wei,Qingqing Zha,Yonghong Ni
Layered double hydroxides (LDH) have attracted great research interest as catalysts for electrochemical water splitting. However, further enhancing the electrocatalytic activity of LDH materials is still a huge challenge. Here, we designed a mild wet chemical route to successfully prepare conductive metal-organic frameworks (cMOFs) modified hollow CoNiFe-LDH nanocages.Firstly, ZIF-67 nanocubes were etched by Ni 2+ and Fe 3+ ions in turn to form hollow CoNiFe-LDH nanocages. Then, hollow CoNiFe-LDH nanocages reacted with 2,3,6,7,10,11hexahydroxytriphenylene (HHTP) to obtain cMOFs modified hollow CoNiFe-LDH nanocages (labeled as CoNiFe-HHTP). Electrochemical measurements showed that the as-obtained CoNiFe-HHTP exhibited excellent electrocatalytic oxygen evolution reaction (OER) performances. In 1 M KOH solution, the as-obtained CoNiFe-HHTP merely required 209 mV overpotential to deliver a current density of 10 mA cm -2 , with a low Tafel slope of 36.81 mV dec -1 . Also, the as-obtained CoNiFe-HHTP could stably run more than 240 h at a current density of 10 mA cm -2 , exhibiting superb long-term stability. The present work provides a promising strategy to promote the electrocatalytic activity of cheap transition metal LDH materials for electrochemical water decomposition.
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