DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 46
·17743-17752
·
IF 4.569
Xinyuan Yu,Jiaying Shen,Qianqiao Chen,Qin Zhong
The rational design of heterostructures, including the synthesis of candidate materials and the construction of structures, is particularly important for the activities of electrocatalysts. Herein, a unique heterostructure of ultrathin NiCo-LDH wrapped CuNiCo trimetallic spinel sulfides was constructed via facile hydrothermal and electrodeposition processes. Due to the ultrathin NiCo-LDH layer, the change in the local electronic structure resulting from the interaction of two components can be effectively transferred to the surface of electrocatalysts, which was verified by XPS tests. The heterostructure exhibits excellent activity and stability as efficient bifunctional electrocatalysts for overall water splitting. The corresponding overpotentials are 270 mV at 50 mA cm−2 for the oxygen evolution reaction (OER), and 93 mV at 10 mA cm−2 for the hydrogen evolution reaction (HER) in 1.0 M KOH, respectively. It is noteworthy that the OER activity exceeds that of RuO2. Meanwhile, the heterostructure presents excellent stability for more than 40 hours. The outstanding performance is attributed to the surface electronic structure of NiCo-LDH optimized by highly conductive and stable CuNiCo trimetallic spinel sulfides. The results confirm that it is an effective strategy to tune the catalytic performance by constructing a heterostructure with an ultrathin surface layer.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 11
·2204
·
IF 4.967
Yi Qian,Wenyuan Su,Long Li,Rongmin Zhao,Haoyan Fu,Jiayin Li,Peidong Zhang,Qingjie Guo,Jingjing Ma
In this work, a novel three-dimensional (3D) hollow nickel-cobalt layered double hydroxide (NiCo-LDH) was synthesized using zeolitic imidazole framework-67 (ZIF-67) as a template, and then utilized to functionalize molybdenum disulfide (NiCo-LDH/MoS2) via electrostatic force. Flame retardant thermoplastic polyurethane (TPU) composites were prepared by the melt blending method. Compared to pure TPU, NiCo-LDH/MoS2filled TPU composite was endowed with a decrease of 30.9% and 55.7% of the peak heat release rate (PHRR) and the peak smoke production rate (PSPR), respectively. Furthermore, the addition of NiCo-LDH/MoS2can significantly improve the thermal stability and char yield of the TPU composite. The catalytic carbonization effect and dilution effect of NiCo-LDH, and the barrier effect of MoS2nanosheets enable TPU composites with excellent flame retardancy and toxic gas suppression ability.Keywords:layered double hydroxide;molybdenum disulfide;thermoplastic polyurethane;flame retardancy
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Mengfang Jiang,Xuefeng Zhang,Xiao Du,Xiaowei An,Fengfeng Gao,Xiaogang Hao,Guoqing Guan,Zhong Liu,Jun Li,Abuliti Abudula
An electrochemically induced electrode with bromide ion (Br - ) dual adsorption sites was obtained by in-situ growing of Ni-MOF derivative/NiCo layered double hydroxide (Ni-MOF(D)/NiCo LDH) composite film on the stainless-steel wire mesh via an electrodeposition-assisted solvothermal method, which exhibited excellent Br - selectivity from ionic mixture solutions of Br - , NO 3 – and I - in an electrochemically switched ion exchange (ESIX) system. The Br - extraction capacity was as high as 126.30 mg·g −1 and the separation factors of Br - /NO 3 – and Br - /I - were 8.29 and 4.83 respectively. Combining the simulation and experimental results, it was confirmed that the highly efficient selective extraction of Br - in neutral solution should be derived from the dual-site (i.e., electrochemically induced laminate metal coordination sites and interlayer anion exchange sites of NiCo LDH) adsorption. Furthermore, the electrode demonstrated superior adsorption–desorption performance and electrochemical stability because of the in-situ growth strategy, which enhanced the binding force between NiCo LDH and substrate and improved the electrical conductivity of NiCo LDH, and provided a storage space for Br - . This study served deep understanding of ions selective extraction mechanism of LDH-based materials in the ESIX process, which could be a novel reaction concept for the design of those electrodes with specific recognition sites in the applications of them in other fields such as supercapacitors, sensors and batteries.
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 5
·1741-1749
·
IF 2.8
Xiong Qiming,Li Xiongzhuang,Zhou Mulan,Chen Rentian,Sun Cheng,Zhou Yanyan,Wang Sijia,Qiu Xiangyun,Song Meijia,Wei Tao
Nickel cobalt layered double hydroxide (NiCo-LDH) nanosheets have attracted much interests in lithium-ion batteries (LIBs) because of its high capacity and low cost. However, the low cycling stability limits their practical applications. Herein, we introduce a simple one-pot hydrothermal method to fabricate a novel flower-shaped Zif-67@NiCo-LDH heterostructure as the anode materials. The structures, morphology, and compositions of the materials were studied by XRD, SEM, TEM, XPS, EDX, and Raman spectra. Electrochemical tests were also conducted. The Zif-67@NiCo-LDH simultaneously inherited the cycling stability of Zif-67 and the high capacity of NiCo-LDH, which effectively improves the conductivity and structural integrity under the synergistic effect of the flower-shaped heterostructures and compositions and showed a good electrochemical performance. This work might enable the future design of heterostructures materials with layered double hydroxide for many other energy-storage technologies.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2024
·
IF 2.7
Honglin Qin,Ruozhu Xu,Lizhen Qiao,Xupeng Zhai,Peixin Guo,Chen Li,Bingyan Han
The widespread use of endocrine disruptors (EDPs) has certain potential hazards to organisms and environments, and it is particularly important to develop effective pretreatment methods before detection of EDPs in complex samples. In this work, a novel magnetic nanocomposite decorated with layered double hydroxides (LDHs) and carbon dots (CDs) was designed and prepared for magnetic solid-phase extraction (MSPE) of EDPs (bisphenol S, bisphenol F, bisphenol A, bisphenol AF, diethylstilbestrol and 4-cumylphenol) combined with high-performance liquid chromatography-ultraviolet (HPLC-UV) detection. The prepared composites were characterized by field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), and the adsorption mechanism towards these EDPs might be mainly based on hydrogen bonds and π–π conjugation. Under the optimized conditions, the proposed method showed limits of detection within 0.05–0.50 μg L−1 and limits of quantitation within 0.2–2.0 μg L−1, and good linearity (R2 ≥ 0.9975) was presented in the range of 0.2–200 μg L−1. Finally, the Fe3O4@C@NiCo-LDH@CDs composite-based MSPE-HPLC-UV method was applied for enrichment and determination of EDPs in water, milk, and tea beverage samples with recoveries in the range of 81.2–119.8% and relative standard deviations below 9.7%.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2025
·
IF 12.1
Lu Luo,Qianqian Zhang,Diwei Shi,Mizi Fan,Guanben Du,Xuesong Tian,Weigang Zhao
Nickel-cobalt layered double hydroxides (NiCo-LDHs) are considered highly promising electrode materials for supercapacitors (SCs). Nevertheless, their limited conductivity and inherent stacking defects lead to inactive electronic states, thereby constraining their electrochemical performance. Here, a dual-conductive-engineered flexible electrode is fabricated through synergistic integration of in situ constructed 3D porous LDH with Ti 3 C 2 T x nanosheets deposition, establishing a semi-confined reaction microenvironment. The collaborative conductive architecture and confinement-enhanced effects enable continuous modulation of Faradaic reaction kinetics during charge/discharge processes, achieving breakthrough improvements in both energy density and cycling stability. The optimized Ti 3 C 2 T x /LDH/CC-50 electrode delivers a remarkable specific capacitance of 1598.7 F g⁻¹ at 1 A g⁻¹, along with excellent rate performance of 87.2% (10 A g −1 ). Furthermore, the constructed aqueous asymmetric supercapacitor (ASC) delivers an impressive energy density of 72.4 Wh kg − ¹ and remarkable cycling stability (90.5% retention after 10 000 cycles). A flexible solid-state asymmetric SC (FSASC) is also fabricated, showcasing a significant energy density of 83.9 Wh kg − ¹ at 900 W kg − ¹ with excellent mechanical flexibility. DFT simulations further revealed enhanced electron transport and a greater number of active sites due to the reduced energy barrier. This work contributes new insights into the structural design of LDH/MXene nanohybrid electrodes for advanced energy density supercapacitors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Jinjie Wei,Qiang Yu,Hui Zhang,Jinbi Che,Qiao Wan,Zhengming Dai,Zhen Chen,Changming Li,Yuanyuan Zhang
In this study, a template-assisted method was successfully employed to derive NiCo layered double hydroxide nanoflowers (NiCo-LDH NFs) with a size of 400–600 nm from cobalt-zeolitic imidazolate framework (Co-ZIF) grown on carbon nanotubes (CNTs). These nanoflowers self-assembled on the CNTs into a distinctive three-dimensional (3D) lamellar architecture, resulting in the NiCo-LDH NFs/CNTs nanocomposite material, which was further leveraged to develop a novel nanozyme-based electrochemical glucose biosensor. The precise regulation of Ni2+ concentration facilitated the directional formation of NiCo-LDH into a 3D lamellar nanoflowers structure, effectively precluding the formation of disordered stacking configurations and thereby endowing it with a high specific surface area and abundant electrochemical active sites. In addition, the synergy between NiCo-LDH NFs and CNTs promoted efficient electron transfer during electrocatalysis, leading to excellent catalytic oxidation ability for glucose. With these merits, the NiCo-LDH NFs/CNTs showed a significant current response to various concentrations of glucose within the detection ranges of 0.5–1000 and 1000–5000 μM, having sensitivities of 1151 and 928.8 μA·mM–1·cm–2, respectively, with a limit of detection of 0.092 μM (S/N = 3). Moreover, the NiCo-LDH NFs/CNTs biosensor was successfully applied to the glucose detection of actual human serum samples, demonstrating the applicability of the biosensor and showing broad application prospects.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2024
·
IF 5.9
Shaohui Wang,Lei Wang,Yanfeng Wang,Lin Li,Hua Wang,Tonghua Wang
The imperative quest for renewable energy sources and advanced energy storage technologies has arisen amidst the escalating perils of climate change and dwindling fossil fuel reserves. In the realm of energy storage technologies, asymmetric supercapacitor (ASC) has garnered significant attention owing to its high energy density and power density. In the quest for advanced electrode materials for ASC, the integration of 2D layered heterostructures on hierarchical porous carbon (HPC) substrates has emerged as a promising approach to enhance the electrochemical performance. Herein, a highly innovative hierarchical NiCo LDH/MoS 2 /HPC heterostructure was successfully synthesized using a simple two-step hydrothermal method for the electrode materials of ASC. Benefiting from the unique hierarchical heterostructure of NiCo LDH/MoS 2 /HPC composite and the synergistic effect between the components, it reveals an exceptional specific capacitance of 2368 F/g at 0.5 A/g in a three-electrode system, which significantly exceeds that of conventional supercapacitor electrodes. Additionally, the ASC device of NiCo LDH/MoS 2 /HPC//HPC achieves remarkable specific capacitance of 236 F/g at 0.5 A/g and an impressive energy density of 84 Wh/kg at a power density of 400 W/kg, as well as superior cyclic stability. This study not only demonstrates the effectiveness of incorporating MoS 2 and NiCo LDH into a carbon-based framework for supercapacitor applications but also opens avenues for designing more efficient energy storage devices.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 47
·22830-22840
·
IF 3.925
Jiajun Nong,Yuexiang Jin,Jun Tan,Hongxia Ma,Yuan Lian
Realizing highly efficient utilization of solar energy for solving problems of environmental pollution and energy shortage has attracted increasing attention. Herein, Z-scheme two-dimensional (2D)/2D NiCo-LDH/g-C3N4 (LDH/CN) heterojunction composites were synthesized, which showed enhanced photocatalytic performance for tetracycline hydrochloride (TC) degradation and hydrogen (H2) generation under visible light irradiation. A 2D/2D heterojunction structure was formed between NiCo-LDH nanosheets (LDH) and g-C3N4 (CN), which was beneficial for the effective separation of photogenerated charge carriers. The active species of hydroxyl (˙OH), superoxide (˙O2−) and hole (h+) radicals contributed to TC photodegradation. The optimum photocatalyst showed a remarkably enhanced photocatalytic capability with a hydrogen generation rate of 451.7 μmol g−1 h−1. The improved photocatalytic activities may be attributed to the synergistic effects of the increased absorption of visible light, the separation efficiency of carriers and the 2D/2D heterostructure. A Z-scheme photocatalytic mechanism was proposed for the LDH/CN composite, showing dual advantages of a high redox ability and efficient charge carrier separation.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Lifeng Hao,Junhuan Zhao,Kangyuan Li,Weiping Zheng,Yanfei Yang,Chenyang Qiu,Zewen Jiang,Wenjun Xia
We report a hydrothermal engineering strategy to synergistically regulate structural barriers, oxygen vacancy-driven redox cycling, and surface functionalization in Ce-NiCo-LDH coatings for ultralong corrosion protection. Vertically aligned LDH nanosheets constructed a tortuous labyrinth barrier to physically impede corrosive species penetration. Oxygen vacancies acted as electron reservoirs to drive Ce 3+ /Ce 4+ redox cycling, enabling dynamic passivation repair via preferential Ce 4+ → Ce 3+ reduction at vacancy sites. Surface functionalization further enhanced protection through two independent pathways: CTAB induced interlocked fibrous nanostructures for mechanical reinforcement, while PFDT grafting formed a fluorine-rich hydrophobic barrier through C-F dipole interactions. EIS characterization demonstrated a 3.6-fold enhancement in charge transfer resistance (Rct = 5.1 × 10 5 Ω·cm 2 ) for the sequentially hydrothermally processed Ce-NiCo-LDHs compared to their single-step counterparts (1.4 × 10 5 Ω·cm 2 ). The CTAB-modified coating achieved 99.0 % inhibition efficiency, while PFDT modification provided long-term hydrophobicity. This triple-scale synergy-structural obstruction, redox-mediated self-healing, and surface engineering-provides a universal framework for designing advanced protective coatings.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
M. Usman Tahir,Hina Arshad,Wenyu Xie,Xianglong Wang,Muhammad Nawaz,Chao Yang,Xintai Su
Dodecahedral imidazolium framework-67 (ZIF-67) is synthesized in aqueous solution and used as a sacrificial template for the synthesis of uniform three-dimensional (3-D) hierarchical hexagonal flower-like nickel–cobalt layered double hydroxides (NiCo-LDH) by facile hydrothermal treatment. TEM and SEM results reveal that each microflower is composed of abundant two-dimensional (2D) ultrathin wrinkled nanosheets. The induction of 2,3,5,6-terafluroterephthalic acid (H 2 tfbdc) and hexamethylenetetramine (HMT) as an additive along with nickel nitrate hexahydrate plays a vital role to tune uniform hierarchical morphology and augmented electrochemical performance. The supercapacitor performance results show that (NiCo-LDH)S HH electrode has the best supercapacitor performance when it is used as a pseudo-capacitor. The maximum specific capacitance is 1765 F g −1 at the current density of 1 A g −1 with stable cycling performance. An asymmetric supercapacitor device assembled using (NiCo-LDH)S HH as the positive and activated carbon (AC) as the negative electrode attains a high energy density of 53.31 Wh kg −1 at a power density of 749.7 W kg −1 with 84.3% capacitance retention after 6000 cycles. This work provides a novel route for the design and synthesis of two-component hydrotalcite with 2D nanosheets having a large interlayer spacing of 9.3 d(Å) and its potential application in electrochemical energy storage.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 47
·33463-33470
·
IF 3.9
Ruibin Liang,Si Liu,Jianrong Lin,Jingfei Dai,Jingyi Peng,Peiyuan Huang,Jianwen Chen,Peng Xiao
Mass loading is an important parameter to evaluate the application potential of active materials in high-capacity supercapacitors. Synthesizing active materials with high mass loading is a promising strategy to improve high performance energy storage devices. Preparing electrode materials with a porous structure is of significance to overcome the disadvantages brought by high mass loading. In this work, a Mn3O4/NiMoO4@NiCo layered double hydroxide (MO/NMO/NiCo LDH) positive electrode is fabricated on a carbon cloth with a high mass loading of 20.4 mg cm−2. The MO/NMO/NiCo LDH presents as a special three-dimensional porous nanostructure and exhibits a high specific capacitance of 815 F g−1 at 1 A g−1. Impressively, the flexible supercapacitor based on the MO/NMO/NiCo LDH positive electrode and an AC negative electrode delivers a maximum energy density of 22.5 W h kg−1 and a power density of 8730 W kg−1. It also retains 60.84% of the original specific capacitance after bending to 180° 600 times. Moreover, it exhibits 76.92% capacitance retention after 15 000 charge/discharge cycles. These results make MO/NMO/NiCo LDH one of the most attractive candidates of positive electrode materials for high-performance flexible supercapacitors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）