ACS Omega
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2026
·
IF 4.3
Shaozhi Wang,Yuli Liu,Chunhui Duan,Weihua Meng,Jixing Xie,Jianzhong Xu
Unsaturated polyester resin (UPR) is a long-chain, hydrocarbon-rich thermoset that is intrinsically highly flammable, which severely limits its engineering applications. Herein, NiCo-layered double hydroxide (NiCo-LDH) nanosheets were covalently grafted onto halloysite nanotubes (HNTs) via an in situ substitution route that employed ZIF-67 as a sacrificial bridging agent, yielding a hierarchical HNTs@NiCo-LDH hybrid. Upon incorporation into UPR, the hybrid formed a dense metal oxide shield during combustion that suppressed the release of combustible volatiles and attenuated radiative heat feedback, thereby imparting superior flame retardancy. Cone calorimetry revealed that 6 wt % HNTs@NiCo-LDH (UPR-H@L) reduced the peak heat release rate by 37.0% and the peak smoke production rate by 23.9% relative to neat UPR. Transition-metal-catalyzed charring generated a compact, continuous carbonaceous barrier that further inhibited mass and energy transfer. Simultaneously, the tensile and impact strengths of UPR-H@L increased, demonstrating a synergistic reinforcement effect. This work establishes a facile physical-barrier/chemical-catalytic strategy for simultaneously enhancing the fire safety and mechanical performance of UPR composites.
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PubMed
高影响因子
Theranostics
·
2026
·Vol. 16
·期 1
·398
·
IF 13.3
Jian Xu,Susu Zhang,Yu Yang,Xingwei Wei,Yunteng Fang,Zhilin Wang,Linwen Lan,Jiayi Shen,Enqian Liu,Wuming Hu,Tingting Hu,Chaojie Yu,Ruizheng Liang,Lingchun Lyu
Rationale: Myocardial ischemia-reperfusion (MI/R) injury induces apoptosis, metabolic dysregulation, and ventricular remodeling through complex pathological mechanisms. Although nanozyme engineering has the potential for antioxidation, reoxygenation, and pro-vascularization, achieving responsive modulation of the pathological microenvironment remains significantly challenging. Methods: A layered double hydroxide (LDH)-based nanozyme (ZnSrMo-LDH/Cu) was synthesized via a low-temperature hydrothermal/isomorphic substitution method for MI/R treatment. The reactive oxygen species (ROS) scavenging ability and responsive ion release performance of ZnSrMo-LDH/Cu were evaluated through various spectroscopic characterization methods. The biosafety and therapeutic efficiency of ZnSrMo-LDH/Cu-BSA nanozymes were assessed by in vitro and in vivo experiments. Results: ZnSrMo-LDH/Cu demonstrated cascade superoxide dismutase (SOD) and catalase (CAT) activities, effectively overcoming acidic microenvironment limitations to maintain CAT activity rather than peroxidase (POD) activity while scavenging ROS to generate oxygen, with a ROS scavenging capacity 2.97 times that of Fe 3 O 4 . Moreover, the acid-triggered Sr 2+ release promoted vascular regeneration and synergistically improved the ischemic-hypoxic microenvironment. Consequently, after bovine serum albumin (BSA) modification, ZnSrMo-LDH/Cu-BSA demonstrated excellent cytoprotective effects, reducing the cardiomyocyte apoptosis rates to 9.4% ( in vitro ) and 20.7% ( in vivo ) of the levels in the MI/R group. In vivo studies further validated that ZnSrMo-LDH/Cu-BSA enhanced cardiac function and attenuated ventricular remodeling by inhibiting oxidative stress and promoting angiogenesis. Mechanistically, ZnSrMo-LDH/Cu-BSA provided a cardioprotective effect by inhibiting the TGF-β signaling pathway, thereby alleviating cell damage caused by MI/R. Conclusions: The pathologically responsive LDH-based nanozyme represents a promising avenue for MI/R treatment.
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PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 12
·4290-4301
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IF 3.348
Ping Lyu,Yongbo Hou,Rongzhen Wang,Mingliang Ma,Yan Chen,Qiyang Xing,Yong Ma,Shuang Wang,Yuefeng Wu,Weibo Huang
The flame retardant zinc ferrite@Mg-Al-sodium dodecyl benzene sulfonate layered double hydroxide (ZnFe 2 O 4 @Mg-Al-SDBS LDH) was prepared successfully by simple hydrothermal method and co-precipitation method. ZnFe 2 O 4 nanoparticle was used as the core on which Mg-Al LDH was encapsulated to form a spherical structure with a lamellar intercalation layer. The microstructure, the phase structure, and the thermal properties of flame retardant were characterized in detail. Compared with pure polyurea (PUA), the total heat release (THR), peak heat release rate (PHRR) and smoke factor (SF) of PUA/ZnFe 2 O 4 @Mg-Al-SDBS LDH 3.0 wt% decreased by 17.64%, 20.13%, and 28.42%, respectively. In the combustion process, Mg-Al LDH could generate porous metal oxides (Al 2 O 3 and MgO), and ZnFe 2 O 4 could also be decomposed into ZnO and Fe 2 O 3 . These oxides catalyzed cross-linking of polymer molecules, to promote the formation of a dense char layer, and isolated heat and combustible gases from the underlying material. The improved flame retardant properties of the modified intercalated microspheres could be attributed to catalytic carbonization and physical barrier. Moreover, the mechanical properties of PUA composites were tested by universal tensile testing machine. The results showed that the addition of ZF@MASL flame retardant had little influence on the mechanical properties of PUA composites.
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高影响因子
ELECTROANALYSIS
·
2023
·Vol. 35
·期 5
·e202200521
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IF 3
Luyi Chen,Ping Xiao,Bin Hu,Yiwen Wang,Jianmao Yang,Jianyun Liu
3-dimensional (3D) Fe−Co−LDH/MXene composite was synthesized by in-situ synthesis and assembly of Fe−Co−LDH rod around MXene under hydrothermal condition. Due to the unique 3D configuration and good conductivity, the obtained Fe−Co−LDH/MXene modified glassy carbon electrode (Fe−Co−LDH/MXene/GCE) showed excellent electrochemical activity for As(III) detection. Via square-wave anodic stripping voltammetry, the response current on Fe−Co−LDH/MXene/GCE had good linear relationship with As(III) concentrations (1∼1000 ppt) with superior sensitivity (0.22 μA ppt −1 cm −2 ) and low detection limit (0.9 ppt). The mechanism of As(III) adsorption was demonstrated. The electrode showed excellent anti-interference ability. Real water sample analysis demonstrated the Fe−Co−LDH/MXene/GCE was deployable in aqua-system.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yuxin Li,Guolang Zhou,Jingzhou Yin,Feixiang Li,Qing Zou,Wen Chen,Wenjie Yan,Qiaoqi Li,Cheng Liu,Alireza Khataee,Lili Zhang
Two-dimensional catalysts, which are sensitive to visible light and have a photothermal effect, can be used to catalyse the release of H 2 from sodium borohydride (NaBH 4 ) are being actively explored in energy saving systems. In this work, oxygen vacancy enriched two-dimensional CoFe-layered double hydroxide (CoFe-LDH) derivatives (named as CoFe- x °C, x = 200–500) have been explored for NaBH 4 hydrolysis catalyzed by photo-thermal synergy without external heat source. The CoFe-300 °C presents its initial hexagonal lamellar structure and has the highest concentration of oxygen vacancy . These unique properties guarantee its excellent photo-thermal synergistic catalytic performance, achieving hydrogen production rate of 1877.5 mmol g −1 h −1 , and maintains high efficiency after 5 cycles. This enhanced photo-thermal synergistic catalytic mechanism is the •OH (generated from h + and H 2 O) attacks BH 4 − (absorbed on O v sites) to produce H 2 , the heat from photothermal conversion accelerates the adsorption ability and attacking rate. This study opens a new strategy for the synergistic photo-thermal catalytic hydrolysis of NaBH 4 .
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高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Yan Sang,Zixuan Guo,Guohong Li,Yingying Xue,Jingwei Xue
The study and development of bifunctional non-precious metal catalysts with excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) electrocatalytic activities are particularly important and challenging for electrocatalytic total water splitting. Here, we report a non-precious material constructed by growing cobalt-nickel double hydroxides on ZIF-derived Co nanoparticles and nitrogen-doped carbon framework (CoNi-LDH/Co@NC), which exhibits excellent electrocatalytic performances for both OER and HER in alkaline media. When used as OER and HER electrocatalysts, CoNi-LDH/Co@NC only needs 359 mV and 187 mV overpotentials at a current density of 100 mA cm −2 , respectively. Surprisingly, using CoNi-LDH/Co@NC as both cathode and anode for a two-electrode water splitting system, a small battery voltage of 1.51 V is required at the current density of 10 mA cm −2 , and the current density remained stable for 20 h without any obvious attenuation. This opens up new possibilities for further exploration of non-precious metal electrocatalysts for water splitting.
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高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Yongxin Lu,Junli Guo,Zhenkun He,Zhida Gao,Yan-Yan Song
With the wide application of supercapacitors, it has been recognized that the drop of energy storage capacity due to cold environmental temperatures limits their utilization efficiency. In this study, a binder-free Ni/Co-layered double hydroxide (LDH)-based high-performance energy storage device is constructed on Ni foam by in situ electrochemically triggered MOF hydrolysis, which exhibits a remarkably enhanced capacity under solar irradiation. Through electrochemically controlled hydrolysis, the ligands in MOFs are replaced by OH – , and the obtained NiCo-LDH retains the original hierarchical porous structure of the MOFs. Benefitting from the sufficient oxygen vacancies and large surface area, the NiCo-LDH electrode shows a high capacity of 5.4 C cm –2 at 1.25 mA cm –2 , which is 64.3 times higher than that of the MOF template. Importantly, the excellent photothermal conversion ability (temperature increase of 52.9 °C within only 30 s) under solar irradiation increases the capacity to 226.0% even at sub-freezing temperature. Furthermore, the asymmetric supercapacitor fabricated using NiCo-LDH delivers an energy density increase of 329.2% in a low-temperature environment (−4 °C) after 15 min solar-light irradiation.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jianyang Li,Jingqi Tian,Mengting Lu,Chenyu Yang,Huaiguo Xue,Tengfei Jiang
Delafossite structure CuFeO 2 has attracted researchers’ interest because of its narrow band gap, high stability, low cost and easy availability. However, due to the low efficiency of internal photoinduced charge separation, there is still a gap between its performance and practical application. Herein, a 2D on 2D CuFeO 2 /Co-LDH heterojunction was prepared by in situ growth method with enhanced charge separation efficiency resulted from the interfacial built-in electric field. Electrochemical and spectroscopic characterization were carried out which illustrated the energy band structure of heterojunction indicating the photoinduced electrons transfer from Co-LDH to CuFeO 2 . By fine-tuning the amount of precursor, we found that CuFeO 2 /Co-LDH-3 heterojunction showed the highest photocurrent of 6.07 μA/cm −2 , which presented optimal performance of photocatalytic selective oxidation of benzyl alcohol with the average conversion and selectivity of 84.33%, and 98.48%, respectively. This work proposes a preparation method of novel 2D on 2D CuFeO 2 /Co-LDH heterojunction, which promotes the development of the heterojunction photocatalysts .’
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Wujian Zhang,Yue Meng,Yuhua Liu,Hui Shen,Zheming Ni,Shengjie Xia,Wenfeng Han,Ying Li,Haodong Tang
In this work, LaOCl/LDH Z-scheme heterojunction catalyst containing oxygen vacancies were successfully constructed and used for photodegradation of norfloxacin (NOR). The results showed that the removal rate of NOR by LaOCl/LDH was up to 90%, and the reaction rate constant was 2 times than LaOCl and LDH. By exploring factors affecting the photodegradation performance, including pH, catalyst dosage, light intensity and reaction time, the kinetics of the degradation process were investigated in detail. It indicates that the formation of Z-scheme heterojunction enhanced the separation and transfer of photogenerated carriers and enhanced the redox capacity of photocarriers. DFT calculation shows that the oxygen vacancies on LaOCl promoted the absorption of visible light and effectively adsorbing and activating small molecules. In addition, based on LC-MS results, intermediates and a possible pathway for NOR degradation were proposed. The synergistic effect of Z-scheme heterojunction and oxygen vacancies enhanced the photodegradation property of LaOCl/LDH for NOR, which provides a reference for constructing highly efficient photocatalysts.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
·
IF 6.76
Zhaobo Fan,Xiaojie Zhang,Youji Li,Xin Guo,Zhiliang Jin
Hydrogen evolution of inorganic photocatalysts is currently a hot research topic. In order to prepare highly efficient catalysts for hydrogen evolution, p-n type heterojunctions were successfully constructed by closely combining p-type Cu 2 O and n-type NiCo-LDH with opposite electrical properties by a simple electrostatic self-assembly. In addition, because the positions of the two single catalysts NiCo-LDH and Cu 2 O Fermi levels are dissimilar from those of traditional p-n heterojunctions, the extremely high movement of Fermi levels forms a strong built-in electric field, which powerfully prevents the gradient diffusion of charge and facilitates the migration of intrinsic photocarriers. Furthermore, the flower cluster NiCo-LDH is composed of two-dimensional thin sheet structure, which has a large specific surface area and can prevent Cu 2 O agglomeration. Under the condition of using triethanolamine solution and eosin Y (EY) respectively as sacrifice reagent reducing agent and photosensitizer, the composite catalyst has reached 18332 μmol·g −1 in 5 h, which was increased by 8.5 times compared to the pure Cu 2 O. This research provides an innovative strategy to construct a heterojunction between a metal double-layer hydroxide and a non-noble metal oxide to realize an effective photocatalytic hydrogen production .
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Shiming Zhang,Yiyuan Rong,Jingwen Wei,Zhihong Li,Ting Liang,Zebin Yu,Hongxiang Zhu,Shuangfei Wang,Yanping Hou
Fabrication of efficient photocatalysts with great visible light utilization ability, rapid carriers’ separation, and suitable redox potential is essential for improving photocatalytic CO 2 reduction. Herein, flower-like microspheres Bi 2 Sn 2 O 7 /NiAl-layered double hydroxide (BSO/LDH) heterojunctions were prepared by hydrothermal process for CO 2 reduction. The Bi 2 Sn 2 O 7 nanoparticles were dispersed on NiAl-LDH nanosheets, with tight contact interface, which facilitated charges transfer and exposing more catalytic active sites. Results of photochemical deposition of metal/metal oxide demonstrated that interfacial charges transfer of the BSO/LDH followed Z-scheme mechanism, endowing more desired redox potential and more efficient carriers separation. The 30%-BSO/LDH showed the highest CO and CH 4 yields of 37.91 and 1.18 μmol g −1 h −1 under visible light irradiation, 3.4 and 2.0 times higher than those from the NiAl-LDH, respectively. The main intermediates during CO 2 reduction were carboxylate (COOH*) and aldehyde group (CHO*), and CO 2 reduction pathways and mechanism were proposed accordingly. This study provided referential strategy for designing efficient heterojunction photocatalysts for CO 2 conversion.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 38
·18295-18305
·
IF 3.925
Zi Dai,Jilin Zhang,Xiaoya Zhao,Xiaoxun Liu,Yunyun Lei,Guixia Liu
Removal of phosphate from wastewater by adsorption has become one of the effective ways to mitigate the negative effects of eutrophication in water bodies, and efficient adsorbent is the key. In this study, MgAl-LDH@ZIF-8 composites were prepared by in situ growth of zeolite imidazole framework-8 (ZIF-8) on layered double hydroxide (MgAl-LDH) for efficient removal of phosphates in wastewater. Compared with pure ZIF-8 and MgAl-LDH, MgAl-LDH@ZIF-8 has higher phosphate removal efficiency of up to 99%. Its maximum adsorption capacity was 68.53 mg P g−1. The adsorption process conformed to the pseudo-second-order kinetic model and Langmuir isotherm model. The thermodynamic results indicate that the adsorption process is spontaneous and endothermic. The adsorption mechanism is mainly electrostatic attraction, ion exchange, and ligand exchange. The MgAl-LDH@ZIF-8 with the dosage of 2.5 g L−1 can remove 30 mg P L−1 of simulated wastewater containing phosphate and meets the discharge standard of the U.S. Environmental Protection Agency (0.5 mg P L−1). The results show that MgAl-LDH@ZIF-8 is an effective adsorbent for the removal of phosphate from wastewater, with potential for practical applications.
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