JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Chunyan Li,Xin Li,Huiqin Wang,MengLing Zheng,Fang Tian,RuYong Tan,Pengwei Huo,Yan Yan,Xinkun Wang
Ternary metal layered double hydroxides (LDHs) have been widely used in supercapacitors (SCs) due to their polyvalent state and high electrochemical activity. In this study, Ga (III) doped NiCo layered double hydroxides (NiCoGa-LDHs) electrode material is prepared on carbon cloth (CC) by simple one-step hydrothermal method for the first time. The effects of Ga 3+ with different molar ratios on the structure, morphology, crystallinity, ion transport mechanics and electrochemical properties of ternary LDHs electrode materials are systematically investigated. At Ga 3+ = 1.0, the as-synthesized Ni 1 Co 3 Ga 1 -LDHs@CC exhibits a special electrochemical capacitance of 2012.5 F g -1 at 1 A g -1 with 57.7% capacitance retention observed at 5.0 A g -1 . The synthesis and evaluation of the two bimetallic NiCo-LDHs and NiGa-LDHs are similar in order to demonstrate the performance improvement of gallium heterovalent substitution. And heterovalent substitution of gallium for cobalt ion and nickel ion is proved indirectly. An Asymmetric supercapacitors (ASCs) device is assembled with Ni 1 Co 3 Ga 1 -LDHs@CC as anode and mesoporous carbon (MPC) as cathode, providing a high energy density of 84.22 Wh kg -1 at a power density of 800.1 W kg -1 , with excellent cyclic stability. This study provides a new way to improve the electrochemical performance and stability of ternary metal LDHs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Ao Xian,Changlong Wei,Zhiwen Tang,Yao Zhang,Qing Wang,Zhiyong Han,Xin Song
Layered double hydroxides have been proved to be effective adsorbents for the removal of per- and polyfluoroalkyl substances (PFASs) from aqueous solutions. In this study, a novel layered double hydroxides modified by perfluorooctyltriethoxysilane (LDHs-PFOTES) was synthesized at room temperature, demonstrating rapid and selective sorption of perfluorooctane sulfonic acid (PFOS). The covalent grafting of fluorosilane groups onto the LDHs surface enhanced hydrophobicity and introduced fluorine functional groups, while preserving the positive charge essential for electrostatic interactions. LDHs-PFOTES removed 97.21 % of PFOS from water within 5 min, with a sorption capacity of 1530.33 mg/g, nearly doubling the capacity of unmodified LDHs (831.79 mg/g). The thermodynamic analysis of PFOS sorption on LDHs-PFOTES revealed that the process is spontaneous and endothermic. LDHs-PFOTES maintained over 90 % PFOS removal efficiency under varying pH levels, ionic strengths, and the presence of competing compounds. Furthermore, the C-F structure on the LDHs-PFOTES enabled fluorine-fluorine (F-F) interactions with PFOS, further improving selective sorption. It was concluded that the combined effects of electrostatic interactions, hydrophobicity, F-F interactions, and ion exchange resulted in the efficient and selective removal of PFOS from water. LDHs-PFOTES demonstrated 95.37 % sorptive efficiency in removing PFOS when treating a mixture of 11 PFAS compounds. Additionally, LDHs-PFOTES effectively desorbed PFOS using a mixed solution of NaCl and methanol, maintaining approximately 95.08 % removal efficiency over three regeneration cycles. This fluorination strategy to modify LDHs offers a novel approach for selectively and efficiently removing PFASs from water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2024
·
IF 2.4
Jia Peijie,Duan Jinsheng,Liu Zhaogang,Li Yilin,Du Guifang,Hu Yanhong,Wu Jinxiu
This study delves into the exploration of zinc lanthanum layered double hydroxides (Zn–La-LDHs) and zinc aluminum lanthanum layered double hydroxides (Zn–Al–La-LDHs) as potential thermal stabilizers for poly(vinyl chloride) (PVC). The investigation aims to elucidate the synergistic effects of the above rare-earth (RE) LDHs in combination with dibenzoylmethane (β-diketone), pentaerythritol (PE), and other commonly employed heat stabilizers on PVC’s crucial properties, including thermal stability, plasticization, and mechanical strength. The experimental findings demonstrated notable enhancements in PVC’s thermal stability upon incorporation of RE-LDHs, β-diketone, and PE. This enhancement is attributed to the ability of RE-LDHs to effectively hinder degradation reactions within the PVC matrix, thereby increasing its degradation activation energy and overall stability. Moreover, the integration of RE-LDHs contributes significantly to improving PVC’s plasticization and mechanical properties, rendering it suitable for a diverse range of applications. While both Zn–La-LDHs and Zn–Al–La-LDHs exhibited good thermal stability, Zn–La-LDHs demonstrated slightly inferior performance compared to Zn–Al–La-LDHs. This distinction underscores the importance of considering the specific characteristics of each LDHs compound when formulating PVC stabilizer systems. Furthermore, this study highlights the potential of RE-LDHs as eco-friendly alternatives to traditional PVC stabilizers, offering opportunities to develop sustainable stabilizer formulations that address environmental concerns associated with conventional stabilizers. In conclusion, the synthesis and application of RE-LDHs represent a significant advancement in PVC stabilization technology, providing a viable and environmentally conscious approach to enhancing the performance and longevity of PVC-based materials. Graphical abstract
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wei Liang,Xiangling Zhang,Chen Wang,Jing Bai,Xuhao Li,Yajia Mao,Jixian Cai,Yifan Li,Siqi Chang,Zhouying Xu,Yu Jiang
The refractory and hard-to-dispose tetracycline hydrochloride (TC) poses an enormous threat to human health and the water environment. Herein, a novel Z-scheme ZnTi-LDHs/Ce 2 S 3 heterojunction photocatalyst was successfully developed for TC degradation under visible light conditions. This sophisticated material demonstrated a remarkable degradation rate of 0.0124 min −1 , marking a noteworthy advancement compared to ZnTi-LDHs, Ce 2 S 3 , and the commonly reported LDHs/LDHs-based composites, with an approximate one-order-of-magnitude improvement. The inherent synergy between Ce 2 S 3 and LDHs manifested as a Z-scheme charge transfer channel, augmenting visible-light absorption, and fostering carrier separation. Both O 2 ·- and h + played critical roles in the TC degradation process, mediating reductive and oxidative pathways, respectively. ZnTi-LDHs/Ce 2 S 3 demonstrated robust reusability and broad applicability for degrading diverse dyes and antibiotics. This work demonstrated a promising protocol for crafting efficient Z-scheme heterojunction photocatalysts based on LDHs and expanded our understanding and potential applications of photocatalytic degradation mechanisms for antibiotics.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiaodong Yang,Feifei Peng,Longfei Zhang,Xiang Wang,Shulin Liu,Wei Yang,Luhong Zhang,Na Yang
Amorphous LDHs materials have been considered promising electrocatalysts for OER since their abundant coordination sites but still undergo poor stability. It is an efficient strategy to rationally architect amorphous/crystalline hybrid nanostructures on the ZIFs-derived amorphous LDH counterparts. Herein, we provide a facile two-step method to fabricate crystalline Ag NPs decorated amorphous QLDHs (Ag/QLDHs) nanosheet arrays on the Ni foam through ions exchange and spontaneous redox reaction. Based on the multi-metal synergetic effects (Co, Zn, Fe, Ni) and regulation of Ag nanoparticles (NPs), the as-formed Ag/QLDHs with heterogeneously hierarchal structures exhibit excellent OER performance with a low overpotential of 216 and 247 mV under 10 and 100 mA cm −2 in 1 M KOH, respectively, together with highly structural robustness. Through using the in situ-Raman spectroscopy, we reveal that the Ag NPs play the important role in enhancing the oxidation state of Ni and Fe species in Ag/QLDHs, which facilitates the generation of active MO x (OH) y at a much lower potential. The synthesized approach proposed in this work will supply a promising pathway for constructing amorphous/crystalline hybrid structures applied to alkaline water oxidation.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·
IF 7.2
Mengnan Qu,Siyu Li,Mengge Cao,Ziqi Liu,Kun Xue,Jinmei He
In this article, a kind of multifunctional composite with magnetic actuation and photothermal conversion functions for oils and MPs adsorption in water was successfully fabricated through dip-coating method. Through a series of steps of grafting PDA, CuCo-LDHs, Fe 3 O 4 , and PDMS on melamine foam (MF) structure, a multifunctional composite sponge was designed, and was labeled as PDMS/Fe 3 O 4 /CuCo-LDHs/PDA@MF (PFCA). The PFCA shows remarkable photothermal conversion performance, the maximum surface temperature can attain 141.1 ℃ under simulated sunlight with intensity of 2.0 kW/m 2 . Meanwhile, the PFCA exhibits remarkable oil–water separation performance, the oil removal efficiencies of various oils are all higher than 99%. Besides, the PFCA presents good adsorption performance for MPs, the maximum removal efficiencies of MPs removal based on PE, PP and PS are 98.3%, 98.1% and 98.7%, respectively. Finally, the adsorption behavior of PFCA for MPs were studied, the MPs adsorption mechanism of PFCA was explored and p–π, π–π interaction, electrostatic force, hydrogen bonding, superhydrophobic effect and their synergistic effect were analyzed.
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产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2022
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IF 8.91
Jialing Sheng,Jiangyan Xu,Benyuan Qin,Hongmei Jiang
In this study, 3D flower-like magnetic CoFe-LDHs/CoFe 2 O 4 was prepared by a facile urea hydrothermal method and utilized to activate peroxymonosulfate (PMS) for degrading aniline (AN). CoFe-LDHs/CoFe 2 O 4 was systematically characterized to explore the relationship between its structure and catalytic performance. Compared with CoFe-LDHs synthesized by co-precipitation method, CoFe-LDHs/CoFe 2 O 4 exhibited three dimensional structure and larger specific surface, which could increase the degradation efficiency of AN markedly. 96% of 10 mg L −1 AN could be eliminated by 0.3 mM PMS and 50 mg L −1 CoFe-LDHs/CoFe 2 O 4 at initial pH 6 within 5 min and the total organic carbon (TOC) removal efficiency could be high to 52.8% in 30 min. CoFe-LDHs/CoFe 2 O 4 can be separated by a magnet easily due to its magnetism, which makes it avoid secondary pollution and provide convenience. After recycling six times, the degradation efficiency still maintained at 92.6%. Besides, CoFe-LDHs/CoFe 2 O 4 /PMS can degrade AN in practical water samples effectively. In addition, the possible mechanism of CoFe-LDHs/CoFe 2 O 4 /PMS system for the degradation of AN was proposed. The radical scavenging experiments confirmed that SO 4 · - , HO· and O 2 · - were involved and SO 4 · - played a dominant role in the degradation of AN, and it was further proved by electron Paramagnetic Resonance (EPR) as well. Our findings can provide some new insights into the efficient and skillful design and application of heterogeneous catalyst for environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 40
·17066-17076
·
IF 0
X. Ge,C. D. Gu,X. L. Wang,J. P. Tu
Traditional methods to synthesize layered double hydroxides (LDHs) with large interplanar spacing require the synthesis of precursor and subsequent ion exchange process. In this work, a one-step ionothermal strategy involving a “two-stage water injection” method is developed for the first time to synthesize cobalt iron layered double hydroxide (CoFe LDH) with 11.3 Å interplanar spacing from an easily available ionic liquid analog, deep eutectic solvent (DES) system. The expansion of interplanar spacing is accompanied with the occurrence of tetrahedrally coordinated cobalt, and the insertion of molecules possibly being acetaldehyde, ethanol and biuret. In addition, more CO32− and fewer Cl− and cyanate/isocyanate anions were intercalated. The nominal formula of a CoFe LDH sample with exclusively 11.3 Å (003) interplanar spacing was determined to be Co0.901Fe0.099C1.398O6.857N0.925H3.375Cl0.018. As a representative demonstration for its improved electrochemical activity, supercapacitor application and OER catalytic activity of the LDHs with different interplanar spacings are displayed, which indicates that the increasing interplanar spacing is a powerful way to improve the electrochemical activity of LDH. The innovative methodology developed in this work should be widely applicable based on the mechanism we investigated, thus providing a fast, simple and cheap way towards LDH with large interplanar spacings.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jingyi Chen,Yongqi Gao,Qingyang Xu,Ke Cui,Yi Wang,Qian Zhang,Zilin Meng
Soil contamination with heavy metals poses a serious threat to ecosystem safety and human health, highlighting the need for efficient adsorbents for remediation. A novel magnetic composite adsorbent was developed in this study through the in-situ growth of layered double hydroxides (LDHs) on biotite followed by sodium dimethyldithiocarbamate (DTC) intercalated (DTC-LDH/Biotite), designed for the efficient removal of Cu(II), Pb(II), As(V), and Cr(VI) from contaminated soil. The successful insertion was confirmed by characterization of C 3 H 6 NS 2 − into the interlayers of LDHs. A three-dimensional porous structure was revealed by SEM with uniformly dispersed LDHs on Biotite surface. Adsorption kinetics followed both the pseudo-second-order model and intraparticle diffusion model, indicating the adsorption process was predominantly controlled by active sites. Isotherm studies demonstrated that Cu(II)/Pb(II) adsorption followed the Freundlich model, indicative of multilayer sorption, while As(V)/Cr(VI) adsorption aligned with the Langmuir model, consistent with monolayer sorption. The maximum adsorption capacities reached 198.7 mg/g (Cu), 211.5 mg/g (Pb), 175.2 mg/g (As), and 163.8 mg/g (Cr). It was revealed by mechanistic analyses that Cu/Pb were immobilized through complexation with C 3 H 6 NS 2 − and with hydroxyl groups to form precipitates, whereas As/Cr were fixed through anion exchange and redox reactions. Soil column tests demonstrated that DTC-LDHs/Biotite effectively intercepted heavy metals within the 10–20 cm soil layer, minimizing vertical migration. The composite enabled efficient magnetic separation, with removal rates for As(V) and Cr(VI) remaining above 82 % after five cycles. This work presents a sustainable strategy for heavy metal remediation, integrating high adsorption efficiency, and recyclability, offering promising applications in soil pollution control.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jin Li,Ying Song,Yanna Wang,Hui Zhang
A series of hierarchical nanosheet array-like Co–Al layered double hydroxides (LDHs)/reduced graphene oxide (rGO) hybrid supported ultrafine PdCu nanocluster (NC) catalysts m-PdCux/LDHs/rGO (x: Cu/Pd molar ratio of 1.5, 3.0, and 5.5; m: Pd loadings of ∼0.80, 0.40, 0.11, and 0.01 wt %) were assembled via an ultrasonic-assisted NaBH4 reduction–sol immobilization strategy. The as-obtained catalysts display ultrafine PdCu alloy NCs with sizes of ∼0.9–1.8 nm finely tuned by both Cu/Pd ratios and Pd loadings and mainly distributed on the edge sites of LDH nanosheets and part of LDHs–rGO junctions upon the unique hierarchical nanosheet array-like structure. Three catalysts 0.85-PdCu1.5/LDHs/rGO, 0.83-PdCu3.0/LDHs/rGO, and 0.80-PdCu5.5/LDHs/rGO exhibit excellent Heck reactivity for iodobenzene with styrene, of which the 0.83-PdCu3.0/LDHs/rGO shows the highest activity, much higher than Pd/LDHs/rGO and single LDHs or GO supported PdCu3.0 catalysts, attributed to the ultrafine PdCu3.0 NCs, the largest electron density of the Pd0 center, and the strongest PdCu3.0 NCs–LDHs–rGO three-phase synergistic effect. The lowest Pd-loading sample 0.01-PdCu3.0/LDHs/rGO shows an unprecedented turnover frequency of 210 000 h–1 (Pd dosage: 2 × 10–5 mol %) with the highest value so far, excellent adaptability for substrates, and reusability. The present work provides a versatile method for designing hierarchically structured ultrafine Pd–M alloy NC catalysts for varied catalysis processes.
研究领域:
催化化学
·
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE SCIENCES
·
2014
·
IF 1.679
Lijun Dong,Chunling Ge,Peiyong Qin,Yan Chen,Qinghong Xu
In this study, MgAl-LDHs (layered double hydroxides) intercalated with sodium dodecyl sulfate and outside surface modified with (3-aminopropyl)triethoxysilane (KH550) were prepared. The existence of organic part in LDHs improved immobilization efficiency and activity recovery of candida lipolytic lipase loaded. Also the positive charge in framework of LDHs was found to be beneficial to the enzyme immobilization. An immobilization efficiency of 56.4% and an activity recovery over 69.2% of the enzyme were obtained after it was loaded on the intercalated and modified LDHs, and catalytic activity of the immobilization can be kept at least five times. Moreover, the immobilized enzyme was found to have higher temperature resistance, wider pH value and better thermostability in reactive activity.
研究领域:
生物化学
·
酶工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Qinwei Zhang,Ruinian Xu,Ning Liu,Chengna Dai,Gangqiang Yu,Ning Wang,Biaohua Chen
In this work, a Ni-supported CeO 2 -Al 2 O 3 catalyst, called NiCeAl-RMO (reduced metal-oxide), was prepared via air calcination and H 2 reduction of NiCeAl-LDH (layered double hydroxide). The NiCeAl-RMO catalyst shows superior CO 2 methanation activity, especially at low temperature (250 °C), and it performed 78.6% CO 2 conversion with ∼ 100% CH 4 selectivity. Compared with NiAl-RMO, the NiCeAl-RMO catalyst prepared via the Ce-doping strategy has significantly improved CO 2 methanation activity. Characterizations revealed that Ce doping would increase the amount of active Ni 0 species, cause a large number of oxygen vacancies, and generate new moderate basicity sites on the catalyst. In addition, in situ DRIFTS found that, unlike the RWGS + CO methanation mechanism over NiAl-RMO, the CO 2 methanation mechanism over NiCeAl-RMO followed the formate pathway by generating bidentate carbonate species, which was revealed as a key intermediate for enhancing the low-temperature activity of CO 2 methanation.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 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）