SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9
Jiali Chen,Lijuan Chen,Yuanzhao Huang,Jin Su,Fan Chen,Wei Wang
The excessive reliance on traditional fossil fuels has not only triggered an energy shortage crisis but also caused severe environmental pollution. These pollutants can significant accumulate via the process of bioaccumulation within the food chain, ultimately posing a serious threat to human health. Therefore, the development of efficient and precise water quality monitoring technologies is crucial for the prevention and control of environmental pollution. In this study, a g-C 3 N 4 -FeCoNi layered double hydroxide (LDH) heterostructure material (g-C 3 N 4 -LDH) was successfully synthesized using a one-step hydrothermal method. The formation of an n–n heterojunction between g-C 3 N 4 and LDH facilitates efficient interfacial charge transfer and structural stabilization, which is critical for bifunctional applications. Consequently, the constructed g-C 3 N 4 -LDH sensing platform exhibits good performance in 4-NP detection, with a sensitivity of 0.664 μA·μM −1 ·cm −2 , a linear response range of 5–800 μM, and a low detection limit of 0.67 μM (S/N = 3). Moreover, the platform demonstrates strong resistance to interference and excellent stability. Additionally, g-C 3 N 4 -LDH can completely degrade 4-NP within 10 min, effectively detoxifying the pollutants. This study offers new insights and a solid foundation for the rapid and accurate detection and treatment of water pollutants.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Mengdie Xu,Jia Wei,Xueru Cui,Jiamei Li,Guoping Pan,Yanan Li,Zijian Jiang,Xiruo Niu,Nan Cui,Jun Li
Electro-Fenton is one of the promising clean and renewable technologies for refractory pollutants control. Herein, a ternary metal-layered double hydroxide (CoFeCe-LDH) nanoparticle in situ growth on carbon felt (CF) was prepared to fabricate heterogeneous electro-Fenton (HEF) cathode via one-pot hydrothermal strategy. The optimal CoFeCe-LDH@CF cathode demonstrated high oxygen reduction activity, low resistance and efficient degradation of DOX over a wide pH range (pH = 1–9). On one hand, the introduction of Ce resulted in the generation of plenty of oxygen vacancies (O α ) on the electrode surface. On the other hand, the coexistence of Co 2+ /Co 3+ , Fe 2+ /Fe 3+ and Ce 3+ /Ce 4+ redox pairs significantly enhanced interfacial electron transfer and promoted the generation and decomposition of in situ H 2 O 2 , which in turn boosted the production of reactive radicals ( OH, O 2 − and 1 O 2 ). The Estimation Program Interface ( EPI ) certificated that intermediates resulted from DOX degradation in the system were relatively low in toxicity to typical aquatic organisms. Meanwhile, the effect experiments of various ions, types of wastewater and pollutants were carried out in the CoFeCe-LDH@CFs-HEF system and all showed excellent pollutant degradation, proving that the developed cathode had special applicability and reusability. Thus, this paper gave a global contribution to develop the high-performance cathode by exploring the synergistic effects of trimetals in LDH and proposed a reliable strategy for enhanced degradation of contaminant by HEF system.
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高影响因子
Polymers
·
2023
·Vol. 15
·期 3
·734
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IF 5
Jinliang Ma,Longlong Liu,Zihao Chen,Minghui Wang,Han Wu,Hongmiao Wang,Ding Yuan,Xin Ning
Exploring high-efficiency, low-cost, and long-life bifunctional self-supporting electrocatalysts is of great significance for the practical application of advanced rechargeable Zn-air batteries (ZABs), especially flexible solid-state ZABs. Herein, ultrathin CoFe-layered double hydroxide (CoFe-LDH) nanosheets are strongly coupled on the surface of leaf-like bimetallic metal-organic frameworks (MOFs)-derived hybrid carbon (Co@NC) nanoflake nanoarrays supported by carbon cloth (CC) via a facile and scalable method for rechargeable and flexible ZABs. This interfacial engineering for CoFe-LDHs on Co@NC improves the electronic conductivity of CoFe-LDH nanosheets as well as achieves the balance of oxygen evolution reduction (OER) and oxygen reduction reaction (ORR) activity. The unique three-dimensional (3D) open interconnected hierarchical structure facilitates the transport of substances during the electrochemical process while ensuring adequate exposure of OER/ORR active centers. When applied as an additive-free air cathode in rechargeable liquid ZABs, CC/Co@NC/CoFe-LDH-700 demonstrates high open-circuit potential of 1.47 V, maximum power density of 129.3 mW cm−2, and satisfactory specific capacity of 710.7 mAh g−1Zn. Further, the flexible all-solid-state ZAB assembled by CC/Co@NC/CoFe-LDH-700 displays gratifying mechanical flexibility and stable cycling performance over 40 h. More significantly, the series-connected flexible ZAB is further verified as a chain power supply for LED strips and performs well throughout the bending process, showing great application prospects in portable and wearable electronics. This work sheds new light on the design of high-performance self-supporting non-precious metal bifunctional electrocatalysts for OER/ORR and air cathodes for rechargeable ZABs.Keywords:carbon fiber;bifunctional electrocatalysts;bimetallic MOFs;self-supporting electrodes;Zn-air battery
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PubMed
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Xin Xu,Shang Wu,Xin Sun,Shuo Tian,Chaoyang Liu,Penghui Zhang,Shuaishuai Fu,Yanbin Wang,Qiong Su,Xia Wang,Quanlu Yang
The rectangular nanorods microstructure with abundant pores can reduce structural damage caused by the volume contraction during charging-discharging processes and enhance the specific capacitance. In this work, to enhance the energy density and accelerate the marketable applications of supercapacitors , Bi 2 O 3 /BiFeO 3 rectangular nanorods with rich mesoporous structure derived from the iron‑bismuth based Prussian blue analogue are rationally designed to achieve a large specific capacitance through precipitation and annealing measures. There are a huge specific capacity of 741 F g −1 and long cycle life. The NiCo-LDH/rGO (954 F g −1 ) demonstrated an impressive stability of 86 % after 10,000 cycles and is utilized to establish asymmetric supercapacitor device. Amazingly, the NiCo-LDH/rGO//Bi 2 O 3 /BiFeO 3 device achieves an enormous energy density of 59.7 Wh kg −1 at 800 W kg −1 . In addition, the capacity retention ratio is 79.3 % after 7000 cycles. The work has suggested that Bi 2 O 3 /BiFeO 3 has great potential as a negative electrode of supercapacitors.
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CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Jian Zhang,Jia-Fang Xie,Jia-Cheng E. Yang,Ding Li,Lu-Bin Zhong,Yu-Ming Zheng
CoFe 2 O 4 /BHC-LDH3 catalyst was constructed by decoration of Co/Al layered double hydroxides (Co/Al-LDH) on bamboo hydrochar (BHC) loaded with magnetic CoFe 2 O 4 to activate peroxymonosulfate (PMS) for ciprofloxacin (CIP) degradation. Taking advantage of structural modulation and synergistic effects between the multi-components, CoFe 2 O 4 /BHC-LDH3 demonstrated high efficient PMS activation and ultra-fast CIP removal (91.50 % within 10 min), compared with BHC (6.26 %), CoFe 2 O 4 (26.32 %), and Co/Al-LDH (40.10 %). Both free radical (SO 4 – ) and non-radical ( 1 O 2 ) were crucial during the degradation process, and a substantial decrease in aquatic toxicity of the intermediates was observed. Additionally, the stability of CoFe 2 O 4 /BHC-LDH3 in actual water environment was tested using a fixed-bed reactor, illustrating the CoFe 2 O 4 /BHC-LDH3 has good stability and anti-interference ability in long-term operation. Possible degradation pathways of CIP in the CoFe 2 O 4 /BHC-LDH3 + PMS system were proposed based on liquid chromatography-mass spectrometer analysis and density functional theory calculation. This work provides new strategies for hydrochar-supported catalyst synthesis for organic pollutants decomposition.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Weibin Chen,Changshui Wang,Shibiao Su,Hai Wang,Dandan Cai
The quest for desirable two-dimensional (2D) materials and facile strategies to construct 2D layered composites with fascinating structures and compositions for high-performance electrocatalysis is still a major challenge. In the present research, novel nanocomposites of 2D zeolitic imidazolate framework-9 (ZIF-9) combined with Co-layered double hydroxide (Co LDH) were successfully synthetized through a controllable phase transition from ZIF-9(I). The 3D to 2D structural transformation of ZIF-9 was induced by deionized water, and the formation of 2D Co LDH was simultaneously realized during the one-step fabrication of ZIF-9(III)/Co LDH nanocomposites. Due to the high surface area, the presence of abundant metal sites, and the interactions between 2D ZIF-9(III) and 2D Co LDH, the as-optimized ZIF-9(III)/Co LDH nanocomposite exhibits great electrochemical activities for oxygen evolution reaction (OER) (η = 297 mV at 10 mA cm −2 ) in 1.0 M KOH solution. The electrochemical performance of the ZIF-9(III)/Co LDH nanocomposite was superior to those of the pure Co LDH, ZIF-9(III), and commercial RuO 2 . The present work demonstrates that the proposed strategy can effectively boost catalytic activities and also design new routes to synthesize advanced MOF nanohybrids for various applications.
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高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Jing Miao,Xiaojun Zhao,Yu-Xiu Zhang,Zhong-Li Lei,Zhi-Hong Liu
Three-dimensionally ordered hollow borate anions intercalated CoMgAl-LDH ball-flower with hierarchical porous structure have been prepared by using zeolitic imidazolate framework-67 (ZIF-67) as a self-sacrificing template. After calcination it, the obtained CoMgAl-borate LDO can inherit the hollow hierarchical porous structure. Its unique structure has the merits of low density, large specific surface area, large pore size distribution and short diffusion pathway, which should be beneficial to the adsorption of larger dye molecules. The maximum uptake capacity of CoMgAl-borate LDO can even reach as high as 1493.3 mg g −1 for Congo red (CR) and 990.1 mg g −1 for methyl orange (MO) owing to the hierarchical hollow porous structure, the “memory effect”, electrostatic interactions, hydrogen bond and ion exchange between anionic dye and cationic adsorbent surface, surpassing those of most previously reported LDH-based adsorbents. The entire adsorption processes for CR and MO follow Langmuir isotherm and pseudo-second-order kinetics model . Moreover, the removal efficiency of CoMgAl-borate LDO can still reach 86.5% for CR and 84.3% for MO after recycling five times, indicating that CoMgAl-borate LDO is a very promising high-efficiency adsorbent. This work not only demonstrates that CoMgAl-borate LDO is a very green and efficient adsorbent for the removal of anionic dyes from wastewater, but also provides a strategy for the rational design and development of hollow nanostructures .
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JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Qiang Yang,Peixin Cui,Cun Liu,Guodong Fang,Meiying Huang,Qiuyue Wang,Yiyi Zhou,Hongbo Hou,Yujun Wang
The stabilization of heavy metals adsorbed in the spent biochar remains a challenge, and the risk of secondary pollution under environmental changes will rise under inadequate post-treatment. Moreover, the safe and sufficient re-utilization of the spent biochar with heavy metals loaded have attracted extensive attention. In this research, the performance and mechanism of rice straw biochar (RSBC) pyrolyzed at different temperature for nickel and cobalt adsorption were investigated, and the stabilization of the adsorbed heavy metals was achieved via a simple two-step strategy: the adsorption of metal ions and the hydrothermal process to form the stable layered double hydroxides (LDH) on biochar, with a leaching rate below 0.005% evaluated by EPA toxicity characteristic leaching procedure (TCLP). Meanwhile, the stabilized RSBC-LDH can be reused as an excellent catalyst in the activation of peroxymonosulfate (PMS) to degrade organic pollutants efficiently. This work eliminated the risk of heavy metal desorption from the spent biochar, and enabled a new strategy for the optimized utilization of biochar in environmental remediation.
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PubMed
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 23
·期 5
·1172-1180
·
IF 3.117
Qibing Dong,Chao Shuai,Zunli Mo,Ruibin Guo,Nijuan Liu,Guigui Liu,Jia Wang,Wentong Liu,Ying Chen,Jingjing Liu,Yangyang Jiang,Qinqin Gao
A Ni-based metal organic framework (Ni-BDC) and subsequently derived NiFe-LDH were studied to overcome the defect of the low availability of active sites for the oxygen evolution reaction (OER) during the water splitting process. This work reported NiFe-LDH nanosheets with an ultra-thin structure through an in situ surface-conversion derived from Ni-BDC. The unique structure and characteristic morphology were confirmed using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy, and the OER activities of the catalysts were systematically studied. The obtained results indicated that the synthesized Ni-BDC@NiFe-LDH-2 showed excellent OER activity, with a low overpotential of 272 mV at a current density of 10 mA cm−2, a small Tafel slope of 45 mV dec−1, and excellent stability, owing to the addition of abundant metal sites and the expansion of the electron transport channels during the conversion process to form the ultra-thin layer structure. This work provides a novel strategy for the application, design, and manufacture of metal organic framework (MOF)-based high-efficiency active materials.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Xiangying Yin,Xiaoyu Ma,Yi He,Hongjie Li,Yi Fan,Teng He,Xiao Guo,Li Chen
In the face of frequent oil spills and dye emissions, membrane technology is an efficient method to treat wastewater. However, selectivity , membrane fouling and high operating pressure are tricky problems for practical membrane applications. Hence, it is desirable to design a novel membrane with high selectivity, high flux and superior antifouling properties for gravity-driven separation of complex oily wastewater. In this study, bioinspired by sea urchins with good self-cleaning properties, an urchin-like Ni/Co layered double hydroxide (LDH) surface was grown onto stainless steel mesh (SSM) via a facile hydrothermal method . Due to the unique hierarchical architecture and surface chemistry, Ni/Co@SSM displays a robust self-cleaning oil-repellent ability without hydration. Combining the unique superwettability and highly porous nanostructure , Ni/Co@SSM could be used to separate various oil/water mixtures and emulsions efficiently under only gravity-driven conditions. In addition, Ni/Co@SSM exhibits great catalytic degradation ability of dye solutions in a short time. Notably, Ni/Co@SSM displays excellent physical, chemical and thermal stability in acidic, alkaline and saline environments. Consequently, Ni/Co@SSM possesses broad application prospects with superior self-cleaning and outstanding catalytic degradation ability of aromatic dyes. It shows promising application value in practical complex oily wastewater treatment without complicated operations and chemicals.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Bin Ou,Jixiao Wang,Ying Wu,Song Zhao,Zhi Wang
Magnetic and recyclable calcined CoFe-LDH/g-C 3 N 4 catalyst was prepared by co-precipitation and calcination method, and used as a multifunctional material to remove hexavalent chromium (VI) via the synergistic effect of adsorption and photocatalysis. The calcined CoFe-LDH provide surface adsorption in the composite, which could lead to the adsorption of Cr (VI) with high adsorption capacity and fast speed. The g-C 3 N 4 nanosheets have high photocatalytic activity in situ for the composite to reduce Cr (VI) into Cr (III). The results demonstrated that 60% Cr (VI) (50 mg L −1 ) can be adsorbed by the nanocomposite in 10 min and the removal efficiency of Cr (VI) reached 100% in 90 min under visible light irradiation by adsorption and photocatalysis. In addition, the calcined CoFe-LDH/g-C 3 N 4 exhibits a mostly pore size about 2.58 nm, large specific surface area (101.61 m 2 g −1 ) with the high structural stability and saturation magnetization (23.06 emu g −1 ), hence, could be easily recycled for ten subsequent runs with little activity loss.
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高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Zhi Wang,Zhengyu Jin,Haixian Liu,Ruoling Liu,Yi Zhang,Yansheng Yin,Hongfang Liu,Xin Yuan,Shaojia Fan,Hongwei Liu
In this work, a series of hydrophobic coatings based on the anti-bacterial nano-hydrotalcite (LDH) materials were successfully prepared in this work. Results indicate that the introduction of Ag and sodium pyrithione (SPT) can effectively increase the anti-bacterial performance of NiAlZn LDH . The designed Ag/NiAlZn LDH and Ag/NiAlZn LDH-SPT coatings not only possess high anti-corrosion performance but can effectively inhibit the adhesion of Pseudomonas aeruginosa and Chlorella vulgaris . The anti-biofouling efficiencies of Ag/NiAlZn LDH-SPT coating against P. aeruginosa and C. vulgaris are 98.5% and 98.2%. Ag/NiAlZn LDH-SPT coating possesses integrated high-efficiency anti-corrosion, anti-biofouling and self-healing properties and good mechanical performance.
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高影响因子
危险品化学品经营许可证（带存储）