APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Yufei Yuan,Cuiyan Tong,Changli Lü
ABSTRACT The low ionic conductivity and poor dimensional stability severely influence the application of anion exchange membranes (AEMs). Therefore, how to balance the problem of excessive swelling of polymer matrix caused by increasing ion conductivity becomes an important challenge. Herein, 3-(dimethylamino)-1- propylamine (DMAPA) and polyethyleneimine (PEI) were grafted to the surface of layered double hydroxide (LDH) through mussel-inspired chemistry. The sheet-like functionalized LDH (DLDH and PLDH) as both filler and crosslinker was incorporated into the quaternized fluorenyl-containing polyethersulfone (QPFSU) matrix to get a series of new composite anion exchange membranes (AEMs). The as-prepared micro-crosslinked AEMs were found to form more hydrophilic conductive ion clusters owing to the generation of new quaternary ammonium groups during the crosslinking reaction. The micro-crosslinked AEMs have better dimensional stability while having higher OH − conductivity. Especially the ion conductivity of CQPFSU-1%-PLDH membrane can reach 86.8 mS cm −1 at 80 °C with excellent dimensional and chemical stability (SR is 9.6% at 80 °C, 21.8% decrease in OH − conductivity at 60 °C in 1.0 M NaOH for 200 h). Overall, the micro-crosslinking method for functionalized LDH modified AEMs achieves a balance between ion conductivity and dimensional stability of AEMs.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Tianyu Wang,Yong Yang,Qinghua Deng,Xiaoyue Zhang,Lijun Xiong,Zheng Tang,Panjie Li,Nan Yin,Aiwu Sun,Dan Chen,Jinyou Shen
Developing of a photocatalyst for multiple antibiotics degradation and revealing their different mechanism are of great importance for wastewater remediation. Herein, a 3D marigold-like CoAl-LDH/Ti 3 C 2 hybrid is developed via in situ growth of CoAl-LDH on Ti 3 C 2 nanosheets and on-spot self-assembly during the hydrothermal process. The existence of optimized Ti 3 C 2 steers the morphology evolution from 2D lotus leaf-like nanoplate to 3D marigold-like hierarchical architecture, which greatly boosts the adsorption capacity and photon capture of the catalyst by the increased specific surface area and the scattering cross section. Meanwhile, the well-defined 2D/2D interface between the components effectively promotes the electron transfer from CoAl-LDH to Ti 3 C 2 , and the photoinduced electron-hole pairs on CoAl-LDH can be greatly separated. The density functional theory (DFT) calculations further demonstrate the change of electronic structure for the composite photocatalyst. As a result, CoAl-LDH/Ti 3 C 2 hybrid presents 85%, 56% and 70% degradation efficiency towards tetracycline hydrochloride, chloramphenicol and terramycin, which are 3.1, 3 and 2.1 times of the pristine CoAl-LDH. Furthermore, the degradation path for chloramphenicol is explored and the reason for its different degradation efficiency is revealed. The design of 3D hierarchical scaffold cooperating with 2D/2D heterogeneous interface provides a new avenue to develop ideal catalysts for wastewater remediation.
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Chunlin Chen,Bin Wang,Guoqing Xiao,Fei Zhong,Jian Zhou,Min Cao,Zhengwei Yang,Chunyan Chen,Rui Zou
In this study, phytic acid -doped polyaniline (PPA) was loaded on the surface of carbon spheres, resulting in a classical C-N-P flame retardant system, that has a beneficial function for the formation of residual carbon. Subsequently, using this phosphorus-nitride carbon sphere (CS/PPA) as a carrier, flower-like Ni-Al-layered double hydroxide (Ni-Al/LDH) were uniformly grown on its surface, thus obtaining a novel nano-fire retardant with a graded structure to heighten the fire-resistant properties of aqueous epoxy resin . Importantly, the intervention of Ni-Al/LDH nanosheets not only imparts a gas-phase fire retardant function to the coating, but also the presence of Ni and Al bimetals can effectively catalyze the formation of more residual carbon in the combustion process. The highest residual carbon (30.7 %) in thermal weight loss experiments of the CS/PPA@Ni-Al/LDH/EP composite coating confirmed this view. Tests on the thermal insulation behavior of coatings illustrated that the backside temperature (168.8 °C) for CS/PPA@Ni-Al/LDH/EP was significantly smaller than that of other coatings, and that this optimum thermal shielding is inextricably linked to the high residual carbon and the residual metal oxides . Furthermore, the CS/PPA@Ni-Al/LDH/EP specimen shown the greatest expansion height (25.1 mm), expansion ratio (19.61) as well as the smallest smoke density rating (39.1 %), proving that its expansion property and smoke suppression were effectively improved. Moreover, the microstructure for the expanded carbon layer demonstrated that the CS/PPA@Ni-Al/LDH filled EP possessed a more complete and dense residual carbon after burning. Moreover, the high degree of graphitization of the residual carbon for CS/PPA@Ni-Al/LDH/EP determined its high thermal stability. The lowest cracked gas phase products and CO release of the CS/PPA@Ni-Al/LDH/EP composite coating during TG-IR testing confirmed its lowest fire toxicity. The development of such a composite flame retardant with a graded structure could help to advance the progress of waterborne intumescent fire coatings.
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Huali Zhang,Jiaxin Zhang,Hanjun Wu,Yi Pan,Yan Xia,Zhiquan Pan,Dongshen Wang
In this work, heterogeneous catalysts of Cu(II)-ethylenediamine tetramethylene phosphonic acid (Cu(II)-EDTMPA) complex intercalated layered double hydroxides (EDTMPA-Cu-LDH) was synthesized by co-precipitation method for visible-light photocatalytic degradation of Rhodamine B (RhB). The synthesized catalysts were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, UV-Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The results indicated that the EDTMPA-Cu-LDH showed a typical layered structure. After intercalation, layer spacing increased from 7.96 to 12.21 Å. The catalysts showed excellent catalytic activity for the degradation of RhB in visible light. The optimum conditions for RhB degradation were confirmed to be natural initial pH value 5.85, 10 mmol L –1 of RhB concentration, 7 mmol L –1 of H 2 O 2 concentration, and 0.3 g L –1 of catalyst dosage. The maximum degradation efficiency was 98.2% under the optimum conditions and excellent reusability and stability were obtained in the regeneration test. In the end, the reaction mechanism that might exist in the heterogeneous UV-Fenton system was proposed.
✓ 已验证
DOI
高影响因子
JOURNAL OF CONTROLLED RELEASE
·
2025
·
IF 11.5
Meng Zhang,Yumei Wang,Jiayi Wang,Jiayi Zuo,Feng Jiang,Feng Cao
Neovascular ocular diseases are a leading cause of irreversible vision loss. Although intravitreal anti-VEGF therapy is the standard treatment, its invasive delivery and limited efficacy in some patients emphasize the need for non-invasive strategies targeting multiple angiogenic pathways. In this study, we developed a novel hybrid nanoplatform for the non-invasive co-delivery of axitinib (Axi) and telmisartan (Tel) to synergistically inhibit both VEGF and Ang-2 signaling pathways. Poorly soluble drugs were incorporated into layered double hydroxides (LDHs) via a micelle-assisted intercalation strategy and subsequently modified with hyaluronic acid (HA) conjugated to Gly-Val-Sar (GVS), a novel PepT1-targeted tripeptide. The Zn-containing LDH provided controlled drug release, and exhibited anti-inflammatory properties. HA modification prolonged ocular retention, and GVS enhanced transmembrane transport. The resulting Axi/Tel-D@LDH-HA-GVS nanocomposites demonstrated favorable physicochemical properties, efficient uptake by human conjunctival and retinal pigment epithelial cells, and potent inhibition of hypoxia-induced angiogenesis in vitro. In vivo, the formulations exhibited prolonged ocular retention, effective posterior tissue distribution, and good biosafety. In a diabetic retinopathy model, Axi/Tel-D@LDH-HA-GVS nanocomposites restored retinal structure and markedly reduced the expression of VEGF, Ang-2, TNF-α, and IL-6. Collectively, this study provides a promising non-invasive and synergistic strategy for targeted treatment of ocular neovascular diseases.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.5
Leidong Lian,Chaonan He,Yanxue Dong,Dingli Xu,Zhe Luo,Xufeng Li,Jie Li,Ke Zhou,Ting Zhang,Liangjie Lu,Kaifeng Gan
Substantial vascularization has emerged as a promising tissue engineering strategy for regenerating critical-sized bone defects. In this study, we developed an injectable smart hydrogel system (GH-LR) by incorporating roxadustat (RD)-loaded MgFe-layered double hydroxide nanoparticles into a gelatin methacryloyl/hyaluronic acid methacrylate (GH) hybrid matrix. This bioactive composite enables the sustained release of therapeutic agents (RD, Mg 2+ , and Fe 3+ ), synergistically promoting angiogenesis–osteogenesis coupling. Comprehensive characterization confirmed the successful synthesis of GH-LR hydrogels with efficient drug encapsulation. In vitro studies demonstrated that GH-LR significantly enhanced endothelial tube formation in human umbilical vein endothelial cells and osteogenic differentiation in bone marrow mesenchymal stem cells (BMSCs), attributable to the prolonged release of bioactive molecules. Mechanistic investigations using RNA sequencing revealed activation of the PI3K-Akt pathways in BMSCs treated with GH-LR hydrogels, correlating with enhanced osteogenesis. In vivo , evaluation in a critical-sized calvarial defect model confirmed accelerated bone regeneration, as evidenced by upregulated expression of Runx2 and Col-1. The therapeutic effects stem from the synergistic interplay between locally sustained angiogenesis and osteogenesis induction. This biocompatible GH-LR system collectively represents an innovative approach for reconstructing large bone defects through controlled delivery and spatiotemporal coordination of pro-regenerative cues.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Mei Wang,Yingkuan Sun,Wei Shang,Yaqian Liu,Liying Jiang
Herein, a cost-effective and user-friendly electrochemical sensor was fabricated via a straightforward surface functionalization strategy using L-cysteine-functionalized NiFe 2 O 4 @NiCoFe LDH/MLG nanocomposites, specifically designed for on-site screening of Pb 2+ in Class III-V surface waters. The fabrication process involved the in-situ one-step hydrothermal growth of NiFe 2 O 4 @ternary NiCoFe layered double hydroxide (LDH) nanomaterials on a multilayer graphene (MLG) scaffold, followed by functionalization with L-cysteine (L-Cys) to yield the Cys/NiFe 2 O 4 @NiCoFe LDH/MLG/SPE sensor. Benefiting from the excellent electrical conductivity of MLG, the synergistic enhancement effect of the ternary LDH, and the multiple coordination active sites of L-Cys, the as-prepared sensor exhibits reliable sensing performance for Pb 2+ detection. Under optimal conditions, the sensor achieved a linear dynamic range of 0.1–3 mg/L and a limit of detection (LOD) of 30 μg/L, which is sufficient to discriminate Pb 2+ concentrations exceeding the regulatory threshold for Class III surface water (50 μg/L, GB 3838–2002). The sensor also demonstrated excellent selectivity against common coexisting ions (Co 2+ , Fe 3+ , Cu 2+ , and Zn 2+ ) and satisfactory repeatability (RSD = 4.42%). In real water sample analysis, recoveries ranged from 94.1% to 113%, confirming its practical applicability. Overall, the Cys/NiFe 2 O 4 @NiCoFe LDH/MLG/SPE composite electrode offers a cost-effective, robust, and operationally simple analytical platform, showing great promise for rapid on-site risk-level screening of Pb 2+ contamination in heavily impacted surface waters, particularly in resource-limited regions.
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2026
·
IF 12.7
Ze Meng,Min Chen,Nan Wang,Bo Li,Lin Ma,Yanzhen Ji,Shiyu Song,Jiangao Liu,Daheng Liu,Jing Wang,Sensen Geng,Shouyu Ren,Xiaohui Liang,Song Ma
The high-performance electromagnetic wave (EMW) absorption materials usually rely on carbon-based materials to enhance dielectric loss, but its easily burning character at high temperatures severely limits its application in high-temperature and heat accumulation environments. How to simultaneously realize excellent EMW absorption and flame retardant in carbon-based materials remains a formidable challenge. Herein, we proposed a special composite design strategy in-situ decorating the insulating layered double hydroxide (CoAl-LDH) nanosheets with flame retardancy function on carbon foam skeleton via a simple one-step hydrothermal method. The optimal minimum reflection loss of −51.8 dB and an exceptionally broaden effective absorption bandwidth (EAB) 5.2 GHz was achieved under absorber thickness 1.8 mm and 20% filling ratio. Taking current composite as pyramidal structure, the full-band absorption from 2 to 40 GHz not only was achieved, but also the anti-combustion effect in 220°C was retained. With insulated CoAl-LDH nanosheets vertically decorating on carbon skeleton, the restriction of long-range electron in carbon skeleton was demonstrated to enhance a dominant dielectric loss, which support the excellent EMW absorption. Together with interlayer water molecules and carbonate ions, the release of H 2 O and CO 2 from the hydroxides in the CoAl-LDH layers and the isolation heat transfer and oxygen from physical barrier was confirmed to contribute the flame-retardant properties. This work not only provides a novel strategy for designing high-performance EMW absorbers with integrated flame-retardant capabilities under about 220°C, but also open up a new perspective in utilizing localized carriers interaction to complete dielectric and combustion reaction regulation. Download: Download high-res image (439KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Siraj Ullah,Waqas Ahmed,Shuozhen Hu,Xinsheng Zhang
Electrochemical water splitting is a potential method for sustainable hydrogen production. Achieving efficient and durable bifunctional electrocatalysts for alkaline water splitting remains challenging due to sluggish OER/HER kinetics and a reliance on noble metals. Here, we introduce MX-CoFe/EMN, a binder-free hybrid electrocatalyst fabricated by sequential electrodeposition of Ti 3 C 2 T x MXene integrated CoFe layered double hydroxide (LDH) nanosheets onto nickel foam. Combining CoFe LDH with MXene, which serves as both conductive scaffold and active component, yields beneficial interfacial electronic interactions, enhanced charge transfer, and a high density of active sites. In 1.0 M KOH, MX-CoFe/EMN shows low overpotentials of 260 mV (OER) and 279 mV (HER) at ±100 mA cm −2 , small Tafel slopes 39 mV dec −1 (OER), 68 mV dec −1 (HER), and excellent durability of over 80 h at ±500 mA cm −2 . These findings demonstrate a scalable electrodepositin-based approach for developing highly active and durable non-noble-metal electrocatalysts for sustainable hydrogen generation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Dayan Li,Xiufang Cui,Yuqi Dong,Xin Wen,Haoyu Song,Xinyue Dai,Guo Jin,Wei Zheng,Yuyun Yang
A novel composite coating with sandwich structure was prepared on the anodic oxidation coating (AO coating) of Mg-Li alloy, which was mainly composed of layered double hydroxide (LDH) nanosheets and electroless NiP coating. The microstructure differences between classical MgAl-LDH nanosheets and high entropy MgAlNiCrZn-LDH nanosheets (HE-LDH) and their effects on the corrosion resistance of the coatings were investigated, especially the effects of the two types of LDH nanosheets on the galvanic corrosion between Mg-Li alloy and Ni alloy coatings. The results show that the sandwich composite coating can effectively improve the corrosion resistance of Mg-Li alloy, especially to inhibit galvanic corrosion. The lifting effect of high entropy LDH sandwich composite coating is significantly higher than that of the MgAl-LDH sandwich composite coating. The coupling current density between Mg-Li alloy and Ni coating was reduced by one order of magnitude, and the self-corrosion current density of composite coating was reduced to 3.31×10 -7 A·cm -2 . HE-LDH nanosheets had better corrosion resistance, which may be due to the high charge density and densification of high-entropy LDH, which increased the adsorption and physical barrier to Cl - .
✓ 已验证
DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2023
·
IF 3.9
Yifei Li,Shimin Hou,Yue Zhang,Zanhong Wang,Chaihui Wei,Haitao Li
This study proposed a one-step preparation method for ZnTi-layered double hydroxide (ZnTi-LDH)/reduced graphene oxide (rGO) nanosheet hybrids in a supercritical ethanol system. After treating pristine ZnTi-LDH and rGO in the supercritical state of ethanol (268 °C, 10 MPa) for 1 h, nanocomposites composed of LDH nanosheets (7–10 nm in thickness) and rGO were obtained. Based on the conversion of ethanol between supercritical and conventional states, this method achieves the exfoliation of LHD nanosheets and reassembly with rGO in one step. This method promotes the generation of oxygen vacancies (OVs) favorable for electron-hole pair separation on the LDH/rGO surface. In the photocatalytic degradation of organic dyes, the degradation rate constants of LDH/rGO composites for Rhb and AO7 are 2.9 and 3.3 times that of pristine LDH, respectively. The enhanced photocatalytic activity was attributed to the OVs on the LDH/rGO surface, the positively charged LDH nanosheets, and the electrical conductivity of rGO.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Rui Ma,Xueqian Yan,Xiaohui Mi,Yaoguo Wu,Jin Qian,Qiuyu Zhang,Guang-Hao Chen
In this study, the Mg-Fe-LDH@biochar composite was firstly fabricated and applied for effectively activation peroxymonosulfate (PMS) for aqueous doxycycline (DOX) degradation. The physiochemical properties of the as-synthesized composite were thoroughly characterized. In the developed Mg-Fe-LDH@biochar/PMS system, the catalytic DOX degradations were evaluated under different conditions. Under the optimal condition (0.75 g/L catalyst loading, 0.75 g/L PMS dosage, pH = 7.0), about 88.76% DOX (35 mg/L) was removed within 120 mins. The results of quenching test and electron paramagnetic resonance (EPR) illustrated that the •OH, SO 4 • - and •O 2 – radicals all contributed to the DOX degradation in the Mg-Fe-LDH@biochar/PMS system, whereas the 1 O 2 -based non-radical degradation played the dominant role in DOX removal. The developed system was almost not adversely affected by the high-strength anions and exhibited high DOX decomposition rates in a wide pH range from 3.0 to 9.0, indicating the great potential in the practical application. The satisfactory reusability of the composite catalyst was demonstrated in the recycling test, with the DOX removal efficiency slightly declined from 90.08 to 84.42% after five runs. Based on the generation of reactive oxidative species and the transformation intermediates identified by HPLC-MS, the possible degradation pathways and reaction mechanism of DOX degradation in Mg-Fe-LDH@biochar/PMS system were proposed.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）