MATERIALS RESEARCH BULLETIN
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2023
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IF 5.4
Tao Wang,Jinyu Wang,Chunlan Li,Yu Wu,Yuxuan Sun,Xiqing Liu,Xiaoli Su,Hongquan Zhan,Yongqing Wang
Carbon materials can act as electron transfer media to effectively enhance photocatalytic performance. In this study, carbon dots (CDs) were prepared using green tea to modify Ni 2 P/NiCo-LDH heterostructures. Benefitting from the Co-P bond formed between Ni 2 P and NiCo-LDH and biomass CDs, charge transfer was improved via dual channel. Ni 2 P and CDs acted as active sites for improving the photocatalytic performance. Owing to the synergistic process, the photoresponse capability of CDs/Ni 2 P/NiCo-LDH was significantly increased. In addition, the possible active species in the photocatalytic process are discussed. This study provides a design for ternary photocatalysts with carbon materials and phosphides.
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 35
·18106-18116
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IF 11.301
Tuo Wang,Huimin Wu,Chuanqi Feng,Lei Zhang,Jiujun Zhang
Water electrolysis is an important way to produce hydrogen at the cathode, but the oxygen evolution reaction (OER) at the anode has a high overpotential. Using the urea oxidation reaction (UOR) to replace OER has been an energy-saving approach for its lower electrode potential, and also a potential approach for wastewater treatment. In this paper, novel materials of MoP@NiCo-LDH/NF-x (x = 10, 20, 30 minutes) are synthesized and explored as bifunctional catalysts for both the hydrogen evolution reaction (HER) at the cathode and the urea oxidation reaction (UOR) or the oxygen evolution reaction (OER) at the anodes of urea–water or water electrolysis. The morphologies and compositions of such catalyst materials are characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy. The catalytic activity and stability are measured by linear sweep voltammetry, electrochemical impedance spectroscopy, chronoamperometry, etc. The results indicate that MoP@NiCo-LDH/NF-20 has better catalytic performance, and can be used as a bifunctional catalyst for both HER and OER/UOR in the electrolysis. A two-electrode electrolyser (MoP@NiCo-LDH/NF-20‖MoP@NiCo-LDH/NF-20) is constructed. At 100 mA cm−2, the two-electrode electrolyser needs only 1.405 V, while the precious metal electrolyser Pt/C/NF‖IrO2/NF needs 1.697 V at the same current density, indicating that MoP@NiCo-LDH/NF-20 could be a promising bifunctional electrocatalyst in water and urea–water electrolysis for the treatment of urea wastewater and hydrogen production.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2019
·Vol. 166
·期 16
·B1681
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IF 3.12
Dandan Song,Lili Wang,Yuning Qu,Bing Wang,Yanting Li,Xueli Miao,Yuying Yang,Cunpeng Duan
Constructing a reasonable electrode material structure is significant for the sensitivity and selectivity of glucose detection. Herein, in this paper, the three-dimensional (3D) hierarchically layered double hydroxides (CC@CCH MOF LDH) is prepared by using carbon cloth (CC) as the conductive base, cobalt carbonate nanorod (CCH) as the guiding template and metal organic framework (MOF) as the sacrifice template. This unique 3D hierarchical structure facilitates the rapid transfer of ions and the reversible redox reaction. Moreover, the electrochemical tests confirm that the material has excellent electrocatalytic oxidation activity in alkaline solution. The amperometric detection results reveal that CC@CCH MOF LDH electrode material possesses better selectivity, higher sensitivity (4310 μA·mM−1·cm−2), fast amperometric response (<6 s), wide linear range (0.001-2 mM) and low detection limit (110 nM) under the optimal conditions, which is expected to be a high performance enzyme-free glucose sensor.
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JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Jiuyun Cui,Zhiping Zhou,Atian Xie,Qianqian Wang,Siwei Liu,Jihui Lang,Chunxiang Li,Yongsheng Yan,Jiangdong Dai
Development of antifouling membrane to separate oil–water emulsions by low energy consumption approach is an urgent demand. Herein, we report for the first time a grass-like structured composite membrane from array growth of nickel cobalt layered double hydroxide (NiCo-LDH) onto the polydopamine modified polyvinylidene fluoride (PVDF) membrane surface via simple hydrothermal strategy. The surface morphology of as-prepared membrane has controlled by hydrothermal time. The obtained NiCo-LDH/PVDF composite membrane exhibits superhydrophilicity/underwater superoleophobicity for separating both surfactant-free and surfactant-stabilized oil–water emulsions by capillary effect under the driving of gravity. Moreover, with the advantages of antifouling performance, the membrane displays outstanding cyclic performance for long-term application, which is promising for practical oily wastewater treatment .
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Journal of Energy Storage
·
2024
·
IF 8.9
Shaopei Yang,Yuhang Jia,Hongzhang Cao,Quan Li,Yujia Guo,Yongqi Mi,Jiajun He,Pengcheng Du
Layered double hydroxides (LDHs) show great advantage in supercapacitors (SCs) due to their unique layered structure and high theoretical capacity. However, their poor electrical conductivity and structural instability hinder their practical application. Metal-organic framework materials (MOFs) can be utilized to construct transition metal derived materials with adjustable morphology and high electrochemical properties . In this study, we first synthesized flower-like NiCo-based MOFs (NiCo-BTC) using a one-step solvothermal reaction. The formation process followed a sequence of “nucleation-growth-etching” corresponding to Ostwald's maturation theory. Subsequently, novel hierarchical NiCo-LDHs micro-flowers were constructed through treating the NiCo-BTC in an alkaline solution. The morphology of NiCo-LDHs was optimized by adjusting the ratio of Ni to Co, so as to achieve excellent electrochemical properties due to the hierarchical flower-like structure and the bimetallic synergistic effect. As a result, Ni 3 Co 1 -LDH exhibited a high specific capacitance of 1978.2 F/g at 1 A/g, excellent rate capability of 82.80 % at 40 A/g and good cycle stability with 70.6 % capacitance retention after 10,000 cycles at a high current density of 10 A/g. Furthermore, the asymmetric SC (ASC) based on Ni 3 Co 1 -LDH//AC exhibited high specific capacitance of 162.4 F/g at 1 A/g and excellent energy density of 54.8 Wh/kg at power density of 779.4 W/kg. In addition, the ASC demonstrated remarkable cycle stability with a capacitance retention of 96.5 % after 3500 cycles. The successful synthesis of 3D hierarchical NiCo-LDHs micro-flowers offers an effective approach to developing highly promising electrodes for SCs.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Yuxuan Zhu,Jing Qian,Ke Xu,Wanru Ouyang,Juan Yang,Nianjun Yang
Monitoring salivary glucose has gained increased attention as a non-invasive approach to prevent and diagnose diabetes. Since the glucose concentration in saliva is lower than that in blood, the development of effective electrocatalysts for highly sensitive glucose detection is thus of great significance. In this study, a hollow nanocage from NiCo-layered double hydroxides (LDH) modified with multi-walled carbon nanotubes (MWCNTs) is designed and further employed as the sensing material to construct a novel non-enzymatic glucose electrochemical sensor with high sensitivity. It is synthesized by utilizing pre-synthesized zeolitic imidazolate framework (ZIF-67)/MWCNTs as a sacrificial template and subsequently conducting a simple solvent-thermal reaction with Ni(NO 3 ) 2 . Such a hollow nanocage preserves the polyhedral framework structure of the used precursor, where the hollow frame-like structure of NiCo-LDH offers accessible catalytic sites, and MWCNTs provides good conductivity. Their combination brings in a bridging effect between MWCNTs and NiCo-LDH, further leading to a large electrochemical active area and excellent catalytic activity of this hollow nanocage. The constructed sensor exhibits a detection limit as low as 0.03 μM for the glucose detection as well as wide linear ranges of 0.1–3000 μM and 3000–9231.8 μM, corresponding to the sensitivity of 2.55 and 1.15 μA mM −1 cm −2 , respectively. Moreover, this sensor enables the tracking of glucose concentration change in salivary before and after food intake. This work offers new highly sensitive sensing materials and potentially valuable approaches for non-invasive glucose detection.
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ACS Sustainable Chemistry & Engineering
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2024
·
IF 7.1
Xujing Ji,Jiayang Zhang,Na Li,Lijing Qiu,Guoqing Zhang,Xinping Duan,Ruixin Wang
Accelerating the electron transfer and thus inhibiting recombination of photogenerated carriers hold paramount significance for photocatalytic solar hydrogen generation. Introducing an intermediate transition layer in the Schottky junction structure would modulate the Schottky barrier and thus enhance the separation efficiency of photogenerated carriers. Herein, we insert an efficient NiCo-layered-double-hydroxide (NiCo-LDH) lamina between molybdenum carbide-supported reduced graphene oxide (Mo2C/rGO, abbreviated as MG) and CdS, fabricating the sandwich composite CdS@NiCo-LDH@Mo2C/rGO (noted as CLMG) for photogenerated hydrogen. The inserted NiCo-LDH enables the dual heterogeneous interface phase of CdS/NiCo-LDH and NiCo-LDH/Mo2C and decreases the Schottky barrier of CdS/Mo2C, boosting the electron transfer of CLMG. In addition, the experiments and DFT calculations indicate that the work functions increase in the order of CdS < NiCo-LDH < Mo2C. Benefiting from the unique nanoarchitecture of the catalyst, the unidirectional cascade electron transport is realized following the order of CdS → NiCo-LDH → Mo2C with NiCo-LDH as an accelerated “electron converter”, which eventually expedites the photogenerated electron transfer of CdS to Mo2C and boosts carrier separation as well as the hydrogen reduction of the integrated system, achieving a 135 times greater H2 production rate (58.07 mmol g–1 h–1) than pristine CdS (0.43 mmol g–1 h–1). Moreover, CLMG exhibits excellent durability.
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APPLIED ENERGY
·
2024
·
IF 10.1
Miao Sun,Yanan Wang,Jaka Sunarso,Xiuxia Meng,Weimin Zhang,Jun Cao,Naitao Yang
Layered nickel‑cobalt double hydroxide (NiCo-LDH) with a high theoretical charge storage capacity has great potential to be used as a supercapacitor (SC) electrode. However, its low electronic conductivity, low stability, and aggregation tendency has been recognized as the main drawbacks. Herein, solvent-induced interfacial-confined process was used to synthesize an unusual brush-like heterostructure of NiCo-LDH vertically anchored on conductive MXene nanosheets, enabled by the solvent-induced effect of the polar hydroxyl group of ethylene glycol and the limited domain effect of MXene nanosheets. This unique brush-like structure promoted mass transfer and improves charge transport behaviours compared to the pure NiCo-LDHs. The resultant NiCo-LDH@MXene had an ideal larger peak pore size of 3.8 nm and BET specific surface area of 175.13 m 2 g −1 compared to those of NiCo-LDH, which facilitates the exposure of active sites and mass transfer. In three-electrode configuration, NiCo-LDH@MXene provided a significant specific capacity of 1310 F g −1 at a 1 A g −1 current density. At a power density of 699.1 W kg −1 , NiCo-LDH@MXene showcased a substantial energy density of 73.8 Wh kg −1 in a symmetric supercapacitor. At a 6 A g −1 current density, NiCo-LDH@MXene-based SC could retain 92.5% of its capacitance at the end of 10,000 charge and discharge cycles, underscoring its excellent stability in practical application. Electrochemical tests and DFT simulation further revealed enhanced ionic adsorption/transport and electron transport, more enriched active sites, and altered electrical configuration on account of the lower energy barrier for NiCo-LDH@MXene relative to NiCo-LDH. The synthesis route and the insights reported here pave a way toward advanced electrode design and development.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2025
·
IF 4.9
Yazhou Liu,Jingwen Hu,Qiyong Zhu,Ping Yang,Yao Jiang,Xuezhi Zhang,Siying Wu
An innovative preparation approach was utilized to prepare bimetallic nanohybrid arrays of NiCo-LDH onto nickel foam through a hydrothermal technique. Then, 2,5-Dihydroxyterephthalic acid ligands were engaged to synthesize NiCo-MOF via a solvothermal method. Subsequently, an alkaline etching-induced technique transformed the bimetallic MOF back into LDH (designated as Et–NiCo-LDH), yielding a bimetallic hydroxide characterized by a denser nanohybrid array and a more abundant pore structure, thereby demonstrating exceptional specific capacitance. The resultant material exhibited a remarkable specific capacitance of 22.39 F cm −2 at a current density of 2 mA cm −2 (about 1194.16 F g −1 at 1 A g −1 .The loading capacity is 12 mg per square centimeter). After enduring 5000 galvanostatic charge-discharge cycles at a current density of 15 mA cm −2 , the material maintained 83.6 % of its initial capacity. Furthermore, when assembled into an asymmetric supercapacitor device with the as-synthesized Et–NiCo-LDH@NF composites serving as the positive electrode and activated carbon (AC) as the negative electrode, the device demonstrated an energy density of 671.42 Wh m −2 and a power density of 1399.99 W m −2 . Additionally, at a mass loading of 1 A g −1 , the energy density and power density were recorded as 45.04 Wh kg −1 and 350.37 W kg −1 , respectively, with a mass loading of 12 mg cm −2 . A capacity retention rate of 85.6 % was achieved after 5000 cycles. This study offers a straightforward method for producing uniform and dense bimetallic nanohybrid arrays tailored for applications in the capacitor field.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 10
·1-15
·
IF 5.3
Xiao Aijin,Li Meng,Hu Yiluo,Zhang Wei,Bai Huiping,Pan Xuejun,Jiang Fengzhi
A CuFeO 2 /NiCo-LDH heterojunction electrochemical sensor (LDH: layered double hydroxide) was developed for the sensitive detection of tetracycline (TC). The sensor was constructed by integrating ZIF-67-derived nanocage NiCo-LDH on nickel foam with CuFeO 2 , forming a p-n heterojunction that enhanced electron transfer and TC adsorption. The sensor exhibited bilinear detection ranges (0.00594 ~ 1 and 1 ~ 25 μM) and a low detection limit of 1.98 nM. Recoveries in real water samples ranged from 92.0 to 109.0%, with relative standard deviations not exceeding 4.5%. In situ Raman spectroscopy and density functional theory calculations confirmed the involvement of multiple redox pairs (Ni 3+ /Ni 2+ , Co 3+ /Co 2+ , Fe 3+ /Fe 2+ and Cu 2+ /Cu + ) and strong interfacial adsorption energy. This sensor presents a practical and efficient approach for onsite TC monitoring. Graphical
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PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Jiayu Zhang,Kun Wang,Jinglu Yu,Kaiyang Xu,Lu Yang,Jiali Rao,Shuqin Song,Yi Wang
Electrochemical H 2 O 2 synthesis via the two-electron oxygen reduction reaction (2e – ORR) offers a green alternative to the energy-intensive anthraquinone process, but its practical viability is hindered by the sluggish and low-value oxygen evolution reaction (OER) at the anode. Here, we present an energy-saving paired electrolysis strategy that replaces anodic OER with methanol oxidation reaction (MOR) using a ternary Mn-doped NiCo layered double hydroxide (Ni 0.50 Co 0.30 Mn 0.20 LDH) catalyst in situ grown on nickel foam (NF) by a one-step hydrothermal method. The optimized catalyst achieves a low MOR potential of 1.32 V RHE at 10 mA cm –2 and a formate Faradaic efficiency of 92.9%, outperforming its undoped counterpart (Ni 0.61 Co 0.39 LDH, 1.37 V RHE and 83.3%). In-situ Raman spectroscopy and density functional theory calculations reveal that Mn doping lowers the energy barrier for the Ni 2+ /Ni 3+ redox transition, facilitating the generation of catalytically active Ni 3+ species. When coupled with graphitized hydroxyl-functionalized multi-walled carbon nanotubes coated on carbon paper (CNTs@CP) as the 2e – ORR cathode in a two-electrode electrolyzer, at the operation condition of 50 mA cm –2 , the 2e – ORR||MOR system delivers a cell voltage reduction of 254 mV, enabling a 10.3% decrease in energy consumption for H 2 O 2 production, compared with the conventional 2e – ORR||OER system. Moreover, the simultaneous generation of value-added formate at the anode yields a 97.9% increase in net economic benefit. This work establishes a generalizable paired electrolysis paradigm for the decentralized, energy-efficient, and economically viable co-production of H 2 O 2 and high-value chemicals.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Mingtao Hu,Ying Wang,Beibei Zhang,Fei Jin,Hongliang Ge,Jiabing Dai,Feng Gao,Qiong Wu
Achieving a broad effective absorption bandwidth at an ultrathin matching thickness remains a central challenge in the design of microwave absorbing materials. Herein, to the best of our knowledge, an amino-acid-mediated molecular regulation strategy is introduced for the first time into conductive textile/LDH microwave absorber design. L -lysine is employed as a molecular regulator to modulate the nucleation and growth of NiCo-LDH nanoarrays on flexible conductive carbon cloth, leading to the formation of denser and more uniform vertically aligned nanoarrays from the initially loose and disordered deposits. The optimized 1.0Lys sample achieves a minimum reflection loss of −25.0 dB at 17.2 GHz with an ultrathin matching thickness of only 1.00 mm and delivers a broad effective absorption bandwidth of 4.24 GHz at 1.09 mm, demonstrating that strong and broadband absorption are realized under ultrathin matching conditions. The enhanced absorption originates from the synergistic effects of L -lysine-regulated dense nanoarrays, abundant heterogeneous interfaces, molecule-related polar groups, high-frequency dielectric attenuation, and improved impedance matching. In addition, CST-based radar cross section simulations reveal effective high-frequency scattering suppression under different observation angles, highlighting its potential applicability in complex electromagnetic environments. This work provides a previously unexplored amino-acid-mediated molecular regulation route for designing flexible microwave absorbers with broad effective absorption bandwidths at ultrathin matching thicknesses.
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危险品化学品经营许可证（带存储）