JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Ying Xue,Xilong Liu,Leiyun Han,Zhengjie Xie,Liangyu Liu,Yixin Li,Yingjie Hua,Chongtai Wang,Xudong Zhao,Xiaoyang Liu
The present study successfully synthesized NiCo 2 S 4 nanotubes@NiMn-LDH nanosheets core-shell hybrid structure on Ni foam through a controllable three-step facile hydrothermal method , the NiMn-layered double hydroxides (LDHs) nanosheets with unlike thicknesses adhere to the outer layer of NiCo 2 S 4 nanotubes by adjusting the heating time of hydrothermal reaction. The optimized NiCo 2 S 4 @NiMn-LDH electrode was able to transmit a high specific capacity of 822.64 C g −1 (4.36 C cm −2 ) at a high current density of 50 mA cm −2 , and maintained 92.7% of its initial specific capacity after 5000 cycles at a current density of 50 mA cm −2 when 2 M KOH was used as the electrolyte. Furthermore, an asymmetric supercapacitor (ASC) device fabricated with NiCo 2 S 4 @NiMn-LDH as the positive electrode and activated carbon (AC) as the negative electrode, and it achieved a maximal energy density of 53.10 W h kg −1 at a power density of 370.82 W kg −1 also maintained 94.3% retention of the initial specific capacitance after 10,000 cycles at a high current density of 20 mA cm −2 . With the excellent electrochemical properties , the as-prepared core-shell structured NiCo 2 S 4 @NiMn-LDH hybrid arrays have extraordinary application potential in the energy storage field.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 31
·19128-19135
·
IF 3.361
Tong Ye,Hongye Li,Mingyue Du,Xiaowei Ma,Xiaolin Liu,Lixiong Wen
Polymer-based dielectric nanocomposites as raw materials of dielectric capacitors used in advanced electronics and electrical systems have a great application prospect but remain a huge challenge to energy storage performance in high electric fields. In this work, MgAl layered double hydroxide (MgAl LDH) nanosheets loaded with Ni nanoparticles were designed and synthesized, and incorporated into polyvinylidene fluoride (PVDF) to fabricate Ni–MgAl LDH/PVDF nanocomposites with high energy density. The effect of Ni–MgAl LDH nanosheet content (0.2 to 0.8 wt%) on the energy storage performance of MgAl LDH/PVDF nanocomposites was studied. As a result, after adding 0.6 wt% Ni–MgAl LDH nanosheets, the nanocomposites obtained the highest energy density 23.87 J cm−3 (at 640 kV mm−1) and the charge–discharge efficiency reached 65%, which was 76% and 18% higher than that of pure PVDF, respectively. This improvement could be attributed to the multiple functions of Ni–MgAl LDH nanosheets under an applied electric field. On the one hand, Ni nanoparticles on the surface of the MgAl LDH nanosheets could enhance the interfacial conductivity, form plenty of parallel micro-capacitors and produce Coulomb blockade effect, which resulted in high dielectric constant and high breakdown strength. On the other hand, two functions contributed by MgAl LDH nanosheets, homogenizing the electric field and inhibiting the growth of the electric tree coming from its medium dielectric constant and sheet structure, were beneficial to increase the breakdown strength. Furthermore, finite element simulations were employed to explain the mechanism of improved dielectric properties of the Ni–MgAl LDH/PVDF nanocomposites.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Jiayu Song,Shengping Wang,Yan Xu,Qingling Liu,Yujun Zhao
Poor catalytic activity and stability are primary defects of traditional Pd/Al 2 O 3 catalysts for the low-temperature methane combustion. Herein, we developed a facile way to synthesize a MgAl-LDHs derived MgAl 2 O 4 spinel with good crystalline lattice and high surface area, which was used as support of Pd-based catalysts. Catalysts with Mg/Al ratio of 1/3 presented the highest methane combustion activity. It was found the well-crystallized MgAl 2 O 4 spinel promoted the dispersion and crystallization of PdO due to the strong interaction between PdO and support, and the electrophilicity and basicity originated from Mg doping suppressed the sintering of PdO particles, leading to the excellent performance of Pd/MgAl3. Moreover, these factors also inhibited the formation of surface OH- species, therefore, improved the water resistance. Such a synthesis strategy of the Pd/Mg x Al y derived from LDHs and the roles of MgAl 2 O 4 spinel could pose some meaningful directions for developing high-efficient Pd-based catalysts for the low-temperature methane combustion.
✓ 已验证
产品关联
DOI
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
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Wenning Yang,Jia Li,Mingyue Wang,Xiaofan Sun,Yong Liu,Jie Yang,Dickon H.L. Ng
A novel core-shell Fe 3 O 4 /CoFe-LDH (layered double hydroxides) hybrid as a peroxidase mimic for the colorimetric detection of ascorbic acid was first fabricated via a facile two-step route. The resulting Fe 3 O 4 /CoFe-LDH hybrid exhibited much higher peroxidase-like catalytic activity for the oxidation of 3,3′,5,5′- tetramethylbenzidine (TMB) with H 2 O 2 than the pristine Fe 3 O 4 and CoFe-LDH nanosheets owing to the unique hierarchical architecture containing more exposed active sites and the synergistic effect between Fe 3 O 4 and CoFe-LDH. A sensitively and selectively visual sensor for the determination of ascorbic acid (AA) was successfully constructed based on the reduction effect of AA with enediol group on the formed oxidation of TMB, which exhibited a sensitive response to AA in the range of 0.5 ∼ 10 μM with the detection limit of 0.2 μM. Additionally, the Fe 3 O 4 /CoFe-LDH magnetic hybrid could be easily recycled by applying a magnetic field. This work provided a feasible means for the fabrication of magnetic nanomaterials with encouraging prospect in biosensing, environmental monitoring and medical diagnostics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Qiuling Ma,Li-chao Nengzi,Bo Li,Zhongjuan Wang,Lichen Liu,Xiuwen Cheng
Activated carbon coated with CoFe layered double hydroxide (AC@CoFe-LDH) as an efficient catalyst of activating persulfate (PS) for the degradation of lomefloxacin (LMF) was successfully prepared and characterized. Various effects of reaction parameters on LMF degradation including PS dosage, catalyst concentration, initial pH and temperature were systematically studied. Results indicated that AC@CoFe-LDH nanocomposites exhibited ultra-high activity for PS activation compared with bare AC, modified AC (AC-HCl) and CoFe-LDH, in which 93.2% of LMF could be removed within 60 min by the AC@CoFe-LDH with an AC to CoFe-LDH ratio of 1:1 activating PS. It was also found that the condition of 1 g·L −1 PS, 0.2 g·L −1 catalyst, solution pH of 5 and reaction temperature of 25 °C was optimized. In the reaction system, both SO 4 − and HO were responsible for the LMF degradation and SO 4 − was the primary one. The cycles of Fe(II)/Fe(III) and Co(II)/Co(III) were confirmed by XPS analysis which revealed the proposed mechanism for PS activation. Moreover, AC@CoFe-LDH nanocomposites with good stability and recyclability showed great potential for the oxidative treatment of organic contaminants.
✓ 已验证
产品关联
DOI
高影响因子
Journal of CO2 Utilization
·
2022
·
IF 8.321
Jia Li,Ge Gao,Yang Liu,Yang Li,Zhi Liu
Stimulating photocatalytic activity of layered double hydroxides (LDHs) have been being as a research hotspot in photocatalysis . Quantum dots doping is a well acknowledged strategy to utilize their photoelectric superiorities to overcome the intrinsic defects of pristine LDHs. In this work, waste biomass-derived carbon quantum dots (B-CQDs)-interspersed CoAl-LDH photocatalysts (B/CALs) are successfully prepared by means of a simple hydrothermal method from green and renewable points of view. The introduction of B-CQDs significantly broadens the light absorption range and capacity of CoAl-LDH. As the terminal electron acceptor , the highly-dispersed B-CQDs can effectively prolong the lifetime of photogenerated charge carriers and promote the separation of photogenerated electron-hole pairs. No assistance from any sacrificial agent , the optimal sample of B/CAL-2 exhibits significantly enhanced photoreduction activity of CO 2 -to-CO and CH 4 , 6.4- and 7.5-fold higher than those of the pristine CoAl-LDH, respectively, and also surpassing many reported high-level LDHs counterparts. Such an uncomplicated case guides a green and feasible route to modify semiconductor materials with renewable biomass, which is expected to be applied to others for enhanced photocatalytic activity.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·125118
·
IF 7.5
Jinzhuo Wang,Yonggang Zhang
Sulfurization-induced in situ surface reconstruction generates a Ni³⁺-rich NiOOH active phase for enhanced AOR activity. • Ni–Cu interaction optimizes interfacial electron transfer and promotes ammonia oxidation kinetics. • Cu/NF cathode promotes NO₃⁻/NO₂⁻ intermediate reduction and improves N₂ selectivity. • Anode–cathode synergistic catalysis integrates active phase reconstruction with intermediate regulation. • The integrated electrocatalytic system achieves > 98% NH₄⁺-N removal with high N₂ selectivity under mild conditions. Electrocatalytic ammonia oxidation (AOR) is a promising strategy for efficient ammonia removal and recovery; however, its practical application remains limited by sluggish reaction kinetics and low N₂ selectivity, while the structure–activity relationship between catalyst surface reconstruction and catalytic performance remains poorly understood. Herein, a sulfurization-modified NiCu layered double hydroxide (S-NiCu-LDH/NF) anode coupled with a Cu/NF cathode was rationally constructed to establish an anode–cathode synergistic electrocatalytic system for efficient NH₄⁺-N oxidation and selective nitrogen conversion. The optimized system achieved over 98% NH₄⁺-N removal within 90 min with an N₂ selectivity exceeding 82%. Electrochemical analyses reveal that sulfurization improves interfacial charge-transfer kinetics, while the Cu/NF cathode further facilitates electron transport through reduced charge-transfer resistance. XPS and Raman analyses suggest that sulfurization induces in situ surface reconstruction during electrolysis, accompanied by the formation of a Ni³ ⁺-rich NiOOH active phase. The reconstructed active phase is proposed to facilitate NH₃ activation and the adsorption and conversion of key reaction intermediates, thereby promoting multi-electron transfer during AOR. Meanwhile, the Cu/NF cathode promotes the electrochemical conversion of NO₂⁻ and NO₃⁻ intermediates, suppressing their accumulation and consequently improving N₂ selectivity through an anode–cathode synergistic process. Download: Download high-res image (232KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Ming-Dan Yao,Qi Liu,Zhe Feng,Ji Cai-Rang,Zi-Long Yang,Yu-long Xie
The heterostructure enhances the stability and activity of the catalyst. • The interfacial electron transfer and slight reconstruction synergistically enhance the catalyst performance. • d-p orbital hybridization enhances the metal synergy. • The formation of the heterojunction alters the rate-determining step of the reaction. This paper reports on a Ni 3 S 2 /NiFe-LDH heterostructure grown in-situ on a nickel foam substrate via a one-step hydrothermal method, and systematically evaluates its oxygen evolution reaction performance. This catalyst requires an overpotential of only 284 mV to reach a current density of 300 mA·cm −2 . Benefiting from the construction of the heterointerface, following 100 h galvanostatic electrolysis at 50 mA cm −2 , merely a 12 mV increase in overpotential was detected at 300 mA cm −2 in post-stability LSV tests. In-depth mechanistic analysis reveals that the introduction of Ni 3 S 2 triggers interfacial electronic reconstruction. Spin polarization and orbital hybridization collectively optimize the density of states of NiFe-LDH, accelerate charge transfer, and enhances its intrinsic catalytic kinetics. This work not only develops a high-performance oxygen evolution catalyst, but also provides a rational strategy for modulating electronic structures via heterointerface engineering to enhance electrocatalytic performance. Download: Download high-res image (328KB) Download: Download full-size image
✓ 已验证
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
Nanoscale
·
2023
·Vol. 15
·期 39
·16131-16143
·
IF 6.7
Jingzhi Wang,Mei Li,Zhiliang Jin
Dynamics and morphology play a crucial role in the field of photocatalytic hydrogen production. Regulating the transfer of photogenerated charges is an effective way to improve the catalytic activity. In this paper, 1T-WS2 is introduced into a p–n heterostructure, ZnCdS/NiV-LDH, as a metalloid electron pump to transfer photogenerated electrons from semiconductors with larger work functions to metalloid materials with smaller work functions, effectively to attract photogenerated electrons, and promote charge rearrangement at the p–n heterostructure interface, so as to achieve the best utilization efficiency of photogenerated charges. Second, adjusting the morphology to increase the light absorption area of the catalyst is also a way to improve the photocatalytic activity. Two different nanosheet structures dispersed heavily stacked ZnCdS, increasing the light absorption area of the system. The optimal catalyst ratio achieves a hydrogen evolution rate of 22.37 mmol g−1 h−1, achieving 7.98% AQE and 2.12% STH conversion efficiency at 450 nm. The potential mechanism was demonstrated through in situ XPS. This study provides new insights into adding “electron pumps” to heterostructures to enhance photocatalytic activity.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Shuangshuang Li,Shuting Tian,Jingcheng Wu,Peng Zhou,Yi He,Xiao Guo
Designing hierarchical micro/nanostructures on the surface of a membrane to endow it with underwater superoleophobic properties and oil-fouling resistance, poses a considerable challenge. In this study, we propose an elaborate method for depositing layered double hydroxides (LDHs) on a ZIF-67 surface grown along nanofibers , resulting in a nanoflower-branched nanofibrous membrane (ZnCo-LDH@PAN) with an abundant cavity structure. The ZnCo-LDH@PAN membrane exhibited excellent mechanical and superdrophilic/underwater superoleophobic properties, reaching an outstanding separation efficiency (>99.0 %) for crude oil emulsion and various sodium dodecyl sulfate (SDS) stabilized oil/water emulsions, and a separation flux of up to 5434.8 L m −2 h −1 under a low-pressure drive. In the continuous separation of 1700 mL emulsion, the efficiency remained relatively stable, and the FRR (flux recovery rate) can be as high as 97.8 %. Further, the ZnCo-LDH@PAN membrane exhibited good mechanical and chemical stabilities. Overall, this study presents an advanced approach for designing separation membranes by combining LDHs with nanofiber-derived materials.
✓ 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）