MICROCHIMICA ACTA
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2024
·Vol. 191
·期 10
·1-13
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IF 5.3
Zhong Yu,Liao Ran,He Guowen,Liu Saiwen,Zhang Jin,Chen Chao
Cubic hollow-structured NiCo-LDH was synthesized using a solvothermal method. Subsequently, clay-like Ti 3 C 2 T x MXenes were electrostatically self-assembled with NiCo layered double hydroxides (NiCo-LDH) to form composites featuring three-dimensional porous heterostructures. The composites were characterized using SEM, TEM, XRD, XPS, and FT-IR spectroscopy. Ti 3 C 2 T x MXenes exhibit excellent electrical conductivity and hydrophilicity, providing abundant binding sites for NiCo-LDH, thereby promoting an increase in ion diffusion channels. The formation of three-dimensional porous heterostructural composites enhances charge transport, significantly improving sensor sensitivity and response speed. Consequently, the sensor demonstrates excellent electrochemical detection capability for quercetin (Qu), with a detection range of 0.1–20 µM and a detection limit of 23 nM. Additionally, it has been applied to the detection of Qu in natural plants such as onion, golden cypress, and chrysanthemum. The recovery ranged from 97.6 to 102.28%. Graphical Abstract
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JOURNAL OF NANOBIOTECHNOLOGY
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2024
·Vol. 22
·期 1
·1-14
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IF 10.6
Liu Xueyan,Hu Tingting,Jia Yijiang,Yang Shuqing,Yang Yu,Cui Zhuolin,Wang Tao,Liang Ruizheng,Tan Chaoliang,Wang Yuji
The rapid proliferation of tumors is highly dependent on the nutrition supply of blood vessels. Cutting off the nutrient supply to tumors is an effective strategy for cancer treatment, known as starvation therapy. Although various hydrogel-based biomaterials have been developed for starvation therapy through glucose consumption or intravascular embolization, the limitations of single-mode starvation therapy hinder their therapeutic effects. Herein, we propose a dual-function nutrition deprivation strategy that can block the nutrients delivery through extravascular gelation shrinkage and inhibit neovascularization through angiogenesis inhibitors based on a novel NIR-responsive nanocomposite hydrogel. CuS nanodots-modified MgAl-LDH nanosheets loaded with angiogenesis inhibitor (sorafenib, SOR) are incorporated into the poly(n-isopropylacrylamide) (PNIPAAm) hydrogel by radical polymerization to obtain the composite hydrogel (SOR@LDH-CuS/P). The SOR@LDH-CuS/P hydrogel can deliver hydrophobic SOR with a NIR-responsive release behavior, which could decrease the tumor vascular density and accelerate cancer cells apoptosis. Moreover, the SOR@LDH-CuS/P hydrogel exhibits higher (3.5 times) compressive strength than that of the PNIPAAm, which could squeeze blood vessels through extravascular gelation shrinkage. In vitro and in vivo assays demonstrate that the interruption of nutrient supply by gelation shrinkage and the prevention of angiogenesis by SOR is a promising strategy to inhibit tumor growth for multimode starvation therapy.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shibin Nie,Kexin Yang,Jinian Yang,Jingwen Wang
Epoxy resin (EP) is a versatile material widely used in fields such as electronic encapsulation, coatings, adhesives, and composites. The targeted assembly of nanomaterials to optimize the flame retardancy, mechanical properties, and interfacial properties of composite materials is a prominent research hotspot in the field of EP. Therefore, a hierarchical sea-urchin inspired architecture (NiPS@LDH), based on layered double hydroxide (LDH) nanosheets grown on nickel phyllosilicate (NiPS), was rationally constructed as a functional filler for EP with a view to building high-performance EP composites. The addition of 1 wt% NiPS@LDH increased the tensile strength, modulus of elasticity, and elongation at break of EP by 44.1 %, 27.6 %, and 66.2 %, respectively, showing excellent strengthening and toughening effects. Meanwhile, under dry friction conditions, the wear rate of the composites was 0.86 mm 3 ·N −1 ·m −1 , reduced by 87.8 % compared to that of pure EP, indicating excellent wear resistance. Besides, the pHRR, THR, pSPR, TSP, pCO and pCO₂ of EP/NiPS@LDH-3 composites were found to be significantly reduced by 54.0 %, 61.9 %, 50.7 %, 54.4 %, 51.2 %, and 58.2 %, respectively. The LOI value of the composites increased to 26.4 %, and the maximum weight loss (R max ) was reduced by 27.7 %. This study provides an innovative strategy for the targeted assembly of nanomaterials, paving the way for the preparation of high-performance EP nanocomposites.
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Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 2
·1-15
·
IF 21.8
Zhao Weigang,Deng Jianping,Li Menghan,Du Guanben,Fan Mizi,Gao Haili,Yuan Zhanhui
In this study, tannin-derived porous carbon (TAC) with different microstructures was prepared via a microwave hydrothermal method, followed by KOH activation. Subsequently, the sea urchin–like NiCo-LDH/Tannin-derived carbon-based microsphere composite materials were rationally synthesized through a single-step microwave hydrothermal co-assembly process. The physicochemical characteristics and supercapacitive performance were systematically analyzed. TAC with a microspherical structure promoted and controlled the growth of LDHs, resulting in a more regular sea urchin–like structure, improved dispersibility, reduced resistance, and increased active sites. NiCo-LDH@TAC600-0 (without KOH activation) as an electrode material delivered a specific capacitance (Cs) of 1250 F g −1 at 1 A g −1 and 1035 F g −1 at 10 A g −1 , with a rate performance of 82.8%. The asymmetric supercapacitor device using NiCo-LDH@TAC600-0 and TAC provided an energy density of 30.8 Wh kg −1 at 800 W kg −1 and a capacitance retention rate of 72.5% after 5000 cycles. This study offers a novel approach to enhancing NiCo-LDH properties for efficient energy storage.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jiyuan Xiao,Jiatian Li,Shuai Yang,Mengjie Liu,Song Xue,Xiaofeng Liu,Miao Yu,Lili Li,Jisheng Wang,Bo Wen,Guorui Yang,Shujiang Ding
The development of efficient electromagnetic wave (EMW) absorbing materials relies on rational microstructures and loss mechanisms. This study innovatively proposes a design strategy based on micronano structural regulation─heterogeneous interface construction─synergistic loss optimization and fabricates a MoC@NiCo layered double hydroxide (LDH) composite material with a 3D chrysanthemum-like morphology. The petal-like microstructure enhances the multiple reflection and scattering effects of the incident EMWs, while heterogeneous interfaces further stimulate interface polarization. Meanwhile, density functional theory (DFT) guides the regulation of polarization and conduction loss synergy for efficient EMW energy attenuation. Experimental results show that the composite material, with a thickness of only 2.4 mm, has a minimum reflection loss (RLmin) of −57.9 dB, and an maximum effective absorption bandwidth (EABmax) covering 5.4 GHz, encompassing the entire C, X, and Ku frequency bands. Radar cross-sectional (RCS) testing further verifies the potential of the material to effectively attenuate EMWs in practical applications. This study provides theoretical basis and method guidance for the efficient design of absorbing materials through the synergistic regulation of polarization loss and conductivity loss and lays a theoretical foundation for the further design of EMW absorbing materials that meet more stringent practical application requirements.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Chunhua Zhang,Bowen Li,Xiang Gao,Wei Xiao,Mingfang Chen,Qilong Bian
This work demonstrates a wireless electroenzymatic platform using carbon microsphere electrodes co-immobilized with a rhodium catalyst and lactate dehydrogenase (LDH) for integrated NADH regeneration and pyruvate-to-L-lactate conversion in a bipolar electrochemical system. The 3D "aggregate reactor" architecture, functionalized via diazonium grafting, Rh coordination, and covalent enzyme coupling, enables spatial coupling of cofactor recycling and biocatalysis, while HPLC revealed a L-lactate production rate of 0.04 mM cm-2 h⁻¹ under 12.5 V cm⁻¹ with a plenty of carbon beads attributed to enhanced mass transport. This wireless, scalable design eliminates wiring constraints and offers modular adaptability for sustainable synthesis of chiral chemicals.
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DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Tian-Li Meng,Jia-Wei Wang,Ying-Xia Ma,Xin-Quan Chen,Lei Lei,Jing Li,Fen Ran
Layered double hydroxide (LDH), as an electrode material, consists of positively charged layers and interlayer hydrated anions and is endowed with promising prospects in supercapacitors (SCs) due to its large specific surface area, tunable metal ions, abundant redox active sites, and low cost. Moreover, metal-organic frameworks (MOFs) exhibit adjustable pore sizes, while multi-walled carbon nanotubes (MWCNTs) boast exceptional electrical conductivity. Hence, in this work, flower-like nickel/manganese layered double hydroxide (Ni/Mn-LDH) was introduced into nanohybrid of MWCNTs decorated with nickel metal-organic frameworks (Ni-MOFs/MWCNTs) to fabricate a novel Ni-MOFs/MWCNTs@Ni/Mn-LDH nanohybrid as electrode material for SCs using a two-step solvothermal method. In the composite structure of the novel Ni-MOFs/MWCNTs@Ni/Mn-LDH nanohybrid, the flower-like assembly of Ni/Mn-LDH nanosheets was seamlessly integrated with MWCNTs adorning the Ni-MOFs, creating an interconnected hierarchical porous network. This distinctive structure, coupled with the synergistic effects of its components, facilitated the swift diffusion of electrolyte ions. Furthermore, it enhanced the accessibility to more active sites at the interfaces during the redox process, thereby contributing considerably to an improved electrochemical performance. The specific capacity of the Ni-MOFs/MWCNTs@Ni/Mn-LDH nanohybrid as electrode material obtained at the optimal experimental conditions was 1151.0C g −1 at 1.0 A g −1 . The assembled asymmetric supercapacitor (ASC) had an energy density of 25.6 Wh kg −1 at a power density of 845.3 W kg −1 . The fabrication strategy of the Ni-MOFs/MWCNTs@Ni/Mn-LDH could be extended to synthesize other nanohybrid.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Lipeng Zhang,Qingqing Lv,Yang Wang,Yufeng Zhang,Yongsheng Wang,Chengjin Chen,Haiyong Wang,Wei Zhu,Zhongbin Zhuang
The development of oxygen evolution reaction (OER) catalysts based on non-noble metals that have high catalytic activity and long-term stability is crucial for the use of an anion exchange membrane water electrolyzer (AEMWE). Here, we report a three-layer composite OER catalyst, NiFe-LDH/CoPi/NF, with the cobalt phosphate (CoPi) interlayer in the middle of nickel foam and a NiFe-LDH nanosheet array. The CoPi interlayer significantly improves the OER catalytic activity as well as the stability. The overpotential required for NiFe-LDH/CoPi/NF to achieve an OER current density of 1000 mA·cm–2 is only 277 mV, and the performance has almost no attenuation for 1000 h of continuous working at 1000 mA·cm–2. The AEMWE using NiFe-LDH/CoPi/NF as an anode reached a current density of 1 A·cm–2 at the cell voltage of only 1.709 V, and it stably operated up to 1200 h. It is found that the CoPi interlayer modulated the morphology of the NiFe-LDH nanosheet arrays and also tuned the electronic structure of the NiFe-LDH. The Ni in NiFe-LDH/CoPi/NF shows a higher valence state, thereby promoting its activity, and also shows a low dissolution rate, thereby promoting its stability.
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JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Xiaoshu Lv,Xiaofeng Qin,Kaifeng Wang,Yiyin Peng,Peng Wang,Guangming Jiang
The scaled application of nanoscale zero-valent iron nanoparticles (nZVI or Fe° NPs) in environmental remediation is challenged by easy surface passivation and particle aggregation. To improve this situation and enhance their performance in Cr(VI) removal from water phase, we present one novel strategy to hybridize nZVI with layered double hydroxide (LDH) decorated reduced graphene oxide (rGO). The as-prepared ternary (Fe@LDH/rGO) composites possess better dispersibility, improved hydrophilicity and more positive surfaces that allows higher removal efficiency and capacity for Cr(VI) oxyanions. Composition proportion are optimized and influences of surroundings (solution pH, Cr(VI) concentration and temperature) are evaluated. Also, we demonstrate that Fe@LDH/rGO can be reused with suitable post-treatments, which combines alkaline solution desorption and NaBH 4 revivification possess. Cr desorption and Fe leaching ratio during regeneration should be critical indicators that determine the recovery efficiency. Synergistic effect within this ternary system not only contributes to its superiorities in stability, but also continuous iron corrosion via the formation of micro Fe-C batteries, where rGO acts as cathode and alternative electron conductor. The present work suggests great potentials of Fe@LDH/rGO composites in groundwater remediation.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Saiya Guo,Wentao Lin,Manman Shi,Jieding Wei,Wei Che,Jong-Beom Baek,Yonghong Ni
It has been attracting extensive research interest how to promote the electrocatalytic performance of transition-metal layered double hydroxides (LDHs) for water splitting. Here, we designed a heteroatom-doping and conductive metal-organic frameworks (cMOFs) co-modification strategy to successfully construct a Ru-doped CoCu-HHTP (HHTP=2,3,6,7,10,11-hexahydroxytriphenylene) /CoCu-LDH nanosheets array on the Cu foam substrate (labeled as CoCuRu-HHTP/CoCu-LDH). Electrochemical measurements showed that CoCu-LDH, CoCuRu-LDH, CoCu-HHTP/CoCu-LDH and CoCuRu-HHTP/CoCu-LDH separately required an overpotential of 204 mV, 175 mV, 69 mV, 27 mV to deliver the current density of -10 mA cm-2 for HER; and 345 mV, 216 mV, 275 mV, 204 mV to reach the current density of 10 mA cm-2 for OER; in 1 M KOH solution. The above facts clearly demonstrate that the present co-modification strategy significantly enhances the electrocatalytic water splitting performance of CoCu-LDH. In a two-electrode setup using the as-prepared CoCuRu-HHTP/CoCu-LDH nanosheets array as the cathode and anode simultaneously, only a cell voltage of 1.48 V was required to deliver the current density of 10 mA cm-2, which is comparable to that of pure noble metal-based materials and outperforms most MOF-based catalysts reported.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Jiangfu Zheng,Xiaoming Li,Jinglin Ding,Xingong Li
Research on peroxymonosulfate (PMS) activation via catalytic processes for degrading trace organic pollutants in aquatic environments has attracted considerable interest. Although iron is widely used in homogeneous advanced oxidation processes (AOPs), its effectiveness in activating PMS remains suboptimal. This study demonstrates that the environmentally benign chelating agent ethylenediamine- N , N ′-dibutyldicarboxylate (EDDS) markedly enhances iron-mediated PMS activation. With six coordination sites, EDDS forms stable five- and six-membered chelate rings with Fe(III)/Fe(II) ions, facilitating efficient PMS activation and leading to complete degradation of NTP. Beyond improving iron's catalytic performance, EDDS also inhibits iron disproportionation, thereby promoting PMS activation and facilitating NTP mineralization. Moreover, the system achieved removal efficiencies exceeding 96 % for tetracycline (TC), ciprofloxacin (CIP), sulfamethoxazole (SMX), and methylene blue (MB) within 35 min. Systematic experiments elucidated the critical role of the Fe(III)/Fe(II) redox cycle in the HeLDH/EDDS/PMS system, highlighting the central involvement of Fe(III) species in the regeneration of Fe(II). Multiple reactive oxygen species, including •OH, SO₄• − , RO•, O₂• − , and 1 O₂, were identified as contributors to NTP degradation. Transformation pathways and mechanistic details of NTP degradation were revealed via mass spectrometry, and toxicity evaluations confirmed a significant reduction in the ecotoxicity of oxidation products. The system also exhibited strong resistance to humic acid interference and effectively degraded multiple organic contaminants, underscoring its potential for sustainable water purification applications.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yuqi Liu,Huanxin Zhao,Dan Wu,Xiaoyuan Shang,Mingyi Lv,Huixin Yu
Although single atom catalysts (SACs) have been recognized as a prospective catalyst in advanced oxidation processes (AOPs) via persulfate activation, they still confronted with the issues of metal atoms aggregation and limit loading amounts. For addressing these issues, single Co atoms that incorporated on Fe-Ni layered double hydroxides (FeNi-LDHs) with oxygen vacancies is fabricated. Employing it as the support of Co atoms can not only minimize the aggregation of single metal atoms but also conductive to increase their loading amounts (up to 3.26 wt%), which is expected to display an unprecedented catalytic activity. 100 % of TC (20 mg/L) can be eliminated within 5 min in Co-FeNi-LDH/PMS system. Radical and nonradical pathway collectively contributed to the TC elimination in Co-FeNi-LDH/PMS system, in which the electron transfer process in nonradical pathway is confirmed as the dominate mechanism via electrochemical studies and quenching experiments. PMS was adsorbed by Co-FeNi-LDH to form a Co-FeNi-LDH/PMS* complex during the PMS activation. Subsequently, TC is decomposed by transferring electrons to the Co-FeNi-LDH/PMS* complex via “donor-acceptor complex” mechanism. Benefiting from this mechanism, the Co-FeNi-LDH/PMS system displays superior anti-interference capability against inorganic anions. This study provides a unique insight on the skillful design and application of SACs.
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