CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Tao Li,Weikun Sun,Jian Zhang,Shengqin Liu,Hongbin Chen,Zumin Qiu,Jason Chun-Ho Lam
Herein, an efficient and stable catalyst of Co 3 O 4 @LDH-AC was innovatively prepared through uniform loading of an activated carbon substrate with Mg/Al layered double hydroxide (Mg/Al-LDH) followed by dispersing Co 3 O 4 nanoparticles in the confined space of LDH. This unique flower-like spherical structure significantly improved the adsorption capacity and would increase the concentration of reactants in the confined space. Experimental results showed that levofloxacin (LFX) completely degraded in 4 min with the addition of µM peroxymonosulfate (PMS). The fast conversion of Co 2+ and Co 3+ in catalyst for the generation of highly reactive species is revealed via EPR, in-situ Raman, in-situ FT-IR, and XPS. Further tests of 5Co 3 O 4 @LDH-AC in effluent of hospital wastewater treatment showed that it not only possessed strong anti-interference capabilities, but also maintained stable catalytic activity in fixed-bed reactor for a long operation time. Therefore, the excellent catalytic performance in confined space offers the possibility of application for the degradation of micropollutants in real pharmaceutical wastewater discharged from hospital (800–1200 tons/day, COD > 150 mg/L).
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Xian Wang,Ze Qin,Jinjie Qian,Liyu Chen,Kui Shen
Developing low-cost but efficient electrocatalysts for continuous oxygen evolution reaction (OER) at ampere-level current densities can promote the hydrogen economy. LDHs are promising electrocatalysts to replace noble-metal-based catalysts for efficient OER, and rationally constructing LDH-based heterostructures can further boost their OER activities. Herein, we report the anchoring of FeNi-LDH nanoflakes onto MOF-derived carbon nanotube (CNT) networks on carbon cloth to obtain the self-supported LDH/CNT/CC. Benefiting from the advantages of its CNT network and the highly-active sites of its three-layer heterostructure, the optimized LDH/CNT/CC only requires a low overpotential of 200 mV at 10 mA cm −2 and exhibits robust stability under continuous electrolysis for 160 h at an ampere-level current density of 1 A cm −2 . Theoretical calculations show three-layer FeNi-LDH(001)/graphene(002)/Co(111) slab has the lowest OER energy barrier, and its graphene layer can gain electrons from the FeNi-LDH and Co to show the most suitable binding strength for intermediates to facilitate OER.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2021
·Vol. 107
·期 1
·70-82
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IF 2.326
Wang Kai,Liu Shanchi,Yang Mengxue,Jin Zhiliang
CdS and layered double hydroxides (LDHs) have drawn wide attention for photocatalytic water decomposition due to their abundant structure and excellent properties. The construction of a heterogeneous structure is a widely used method for a single material to overcome their narrow spectral light response and inefficient charge separation. In this work, a CdS/CoAl LDH step-scheme (S-scheme) heterojunction photocatalyst was successfully constructed by coupling CdS and CoAl LDH based on the complementary properties of the two materials. Compared with single CdS and CoAl LDH, the prepared CdS/CoAl LDH composite photocatalyst shows excellent photocatalytic hydrogen production efficiency by efficient use of electrons and holes under visible light irradiation. A significant number of electrons in the S-scheme heterojunction photocatalyst can be efficiently used to participate in water splitting while the holes were consumed by the sacrificial reagent. Therefore, the building of the S-scheme heterojunction eventually improved the efficiency of photocatalyst hydrogen production by efficiently separating electrons and holes. At the same time, our work will provide a new approach for the practical application of such semiconductors.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Energy Material Advances
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2023
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IF 12.9
Yingying Hao,Chen Qiao,Shuping Zhang,Yibin Zhu,Lei Ji,Chuanbao Cao,Jiatao Zhang
Active site exposure and intrinsic catalytic performance are considered important aspects of oxygen evolution reaction catalyst design. In this work, the coordination capacity of tributylphosphine is utilized to construct cationic vacancy defects on NiFe-LDH nanosheets. As-prepared defective NiFe-LDH nanosheets show not only the optimization of the exposure ability of the active site but also the intrinsic catalytic capacity is improved by construction of cationic vacancy defect to tune local electronic structure. The x-ray photoelectron spectroscopy results revealed that after reconstruction of the prepared d-NiFe-LDH, high-valence Ni and Fe can stably appear on the surface of the material. The presence of high-valence Ni and Fe is considered to be the main reason to improve the intrinsic catalytic capacity of catalysts. Finally, d-NiFe-LDH nanosheets show excellent catalytic performance (η10 = 243 mV) and remarkable long-term stability.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Guangchao Sun,Jiayu Zhang,Xiang Li,Bianlei Hao,Fatang Xu,Kaiqi Liu
The efficient removal of Cr(VI) in water with high solubility and mobility is of great significance because Cr(VI) is one of the most toxic heavy metals, but it also faces some major challenges. The dispersibility and recyclability of nanoadsorbents are closely related to their Cr(VI) removal efficiency. Herein, the self-assembly method was used to synthesize core-shell hybrid nanoparticles , named Fe 3 O 4 @LDH, with a vertically aligned layered double hydroxide (MgAl-LDH) nanosheet shell and a Fe 3 O 4 magnetite core. The obtained Fe 3 O 4 @LDH nanoparticles exhibit a highly porous and well-ordered three-dimensional core-shell structure with a wool-ball-like morphology. The self-assembled morphology of the core-shell structure can be effectively controlled and induced by regulating the Mg 2+ /Al 3+ ratio of the reaction system. The influence mechanism of charge density of LDH brucite-like layers on the self-assembled morphology was proposed. Fe 3 O 4 @LDH nanoparticles exhibit a Cr(VI) adsorption capacity of 108.7 mg/g. The synergetic contribution of the hybrid self-assembly of Fe 3 O 4 and MgAl-LDH leads to more dispersion, better adsorption capability, and faster kinetics. Moreover, because of the super-paramagnetic and highly saturated magnetization (34.53 emu/g) of the Fe 3 O 4 @LDH nanoparticles, they can be used as efficient magnetic adsorbents and easily separated using a magnetic field and reused. The prepared Fe 3 O 4 @LDH nanoparticles are a cost-effective nanoadsorbent for removing Cr(VI) from wastewater and provide a reference for the structural design and construction of nanocomposites .
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Catalysis Science & Technology
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2021
·Vol. 11
·期 23
·7727-7739
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IF 6.119
Biao Zhu,Qianxin Xu,Xiaoyan Bao,Dawei Lu,Hao Yin,Yumei Qin,Xing-Can Shen
The development of efficient and stable photocatalysts to solve environmental issues is essential and remains a big challenge. In this work, flower-like CoNiFe-LDH is deposited in situ on g-C3N4 nanosheets, successfully constructing a Z-scheme heterojunction CoNiFe-LDH/g-C3N4 photocatalyst for the photoreduction of CO2 and photodegradation of MB dye. The synthesized nanohybrid shows superior photocatalytic CO2 performance (42.04 μmol g−1 h−1) and fast photodegradation MB performance (0.1057 min−1). The improved photocatalytic performance was attributed to the formation of the Z-scheme heterojunction with matched energy bands, and the intimate heterojunction contact interface, which significantly enhanced the interfacial charge transfer rate and improved the separation efficiency of electron–hole pairs. Moreover, the photocatalytic mechanism was proposed based on PL, photocurrent responses, EIS, and EPR experiments. This work can shed light on further application for environmental problems of Z-scheme heterojunction photocatalysts.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
iScience
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2024
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IF 4.6
Meng Wang,Xiaoyu Li,Yanrui Su,Jiaoge Wu,Tian Sun,Xuan Xu,Faying Fan,Yufei Zhao,Wa Gao
Fenton or Fenton-like reactions have been widely used in various fields, including solar energy conversion to generate hydroxyl radicals, environmental remediation, biology, and life science. However, the slow Fe 3+ /Fe 2+ cycle and narrow applicable pH range still present significant challenges. Here, a heterostructured CoFe-layered double hydroxide/MoS 2 nanocomposite (CoFe-LDH/MoS 2 ) was prepared via simple electrostatic interactions. The heterostructure establishes a robust interfacial contact, leading to an abundance of exposed Mo 6+ sites. Consequently, the developed CoFe-LDH/MoS 2 +H 2 O 2 system exhibited superior performance in the degradation of tetracycline (>85%) within 60 min across a wide pH range from acidic to basic. Moreover, the CoFe-LDH/MoS 2 heterojunction catalysts exhibited exceptional resistance to common anions and efficiently degraded various organic pollutants. The mechanism study verified that the CoFe-LDH/MoS 2 had high efficiency in producing 1 O 2 and ‧OH to degrade various organic pollutants. The present study will serve as a foundation for creating efficient catalyst systems for related environmental remediation.
研究领域:
环境科学
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催化材料
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污染治理
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Qianqian Qin,Hongliang Xu,Shiping Sun,Zhiyuan Zhao,Xiufeng Ren,Mingliang Li,Bo Song,Gang Shao,Hailong Wang,Hongxia Lu
2D/2D MgAl-LDH/g-C 3 N 4 composites were synthesized via electrostatic self-assembly method in aqueous solution. The MgAl-LDH nanosheets were uniformly anchored on the surface of g-C 3 N 4 nanosheets, which constructed a MgAl-LDH/g-C 3 N 4 heterojunction, thus facilitated the separation and transport of photogenerated electron and hole pairs and improved the photocatalytic degradation performance. The photocatalytic activity of the MgAl-LDH/g-C 3 N 4 composites strengthened with the increasing of MgAl-LDH content, reached the optimum for the sample 30 %MACN (containing 30 wt% of MgAl-LDH), and then gradually decreased. Under the visible light irradiation for 150 min, 30 %MACN composite degraded 80.1 % of ciprofloxacin (CIP), and its first-order reaction rate constant was 2.04 times that of pure g-C 3 N 4 nanosheets. Additionally, the effects of the catalyst dosage, pH value and the initial concentration of CIP on the degradation efficiency of CIP were investigated. Moreover, 30 %MACN exhibited outstanding stability and recyclability, as well as good universality for degrading organic pollutants, including norfloxacin, methylene blue, tetracycline and crystal violet. The degradation pathway and the mechanism of CIP were proposed. This work provided a feasible green way to synthesis MgAl-LDH/g-C 3 N 4 composite photocatalyst with high performance for removing pollutants in wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
DESALINATION
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2025
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IF 9.8
Yi Lu,Xiang Wang,Xiaofeng Xu,Pan Wu,Zongze Li,Guangyao Zhang
The increasing global demand for freshwater and clean energy necessitates innovative solutions that address both resource scarcity and environmental challenges. Herein, we present a 2D sandwich-like hybrid membrane, composed of bacterial cellulose (BC) and calcined CoAl-LDH nanosheets (CAL-T), fabricated via a layer-by-layer deposition strategy. This multifunctional membrane synergistically integrates photothermal evaporation and photocatalytic CO 2 reduction, leveraging the porous structure and narrow bandgap (1.37 eV) of CAL-T to enhance solar absorption and energy conversion. Furthermore, the BC matrix facilitates efficient water transport and mechanical stability, ensuring long-term operational performance. Under 1 kW ∙ m −2 solar irradiance, the BC/CAL-650 membrane achieves a water evaporation rate of 1.36 kg ∙ m −2 ∙ h −1 , surpassing most reported 2D evaporators, and a CO evolution rate of 8.78 μmol ∙ g −1 ∙ h −1 , significantly outperforming conventional photocatalysts. Furthermore, the BC matrix facilitates efficient water transport and mechanical robustness, ensuring long-term operational performance. These dual-functional capabilities, coupled with low-cost fabrication (~$0.0041 per membrane), demonstrate the membrane's superiority and practical potential in integrated solar-driven water purification and solar-to-fuel conversion. This work establishes a versatile platform for advancing next-generation hybrid materials to mitigate water scarcity and climate change challenges.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ENERGY
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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.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 35
·16625-16640
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IF 3.553
Zhang Zewu,Zhou Jiamin,Wei Hanlin,Dai Yifan,Li Shijia,Shi Haojun,Xu Gang
Abstract Efficient design and preparation of cost-effective and binder-free bifunctional electrocatalysts to accelerate the hydrogen and oxygen evolution reaction (HER and OER) are critical for overall water splitting. In this work, 3D hierarchical NiFe-LDH/FeCoS 2 /CFC electrodes were synthesized for the first time. The carboxyl groups derived from acid treating promote the homogeneously coated FeCoS 2 on CFC, giving rise to the strongly coupled FeCoS 2 /CFC hybrid. The NiFe-LDH exhibited the vertical growth feature on the FeCoS 2 /CFC composite, which can efficiently expose the active edges sites. Due to unique structure and synergistic effect between the components, the NiFe-LDH/FeCoS 2 /CFC exhibits significant electrocatalytic activity and stability under alkaline environments, with overpotentials of 190 and 308 mV to achieve 10 mA cm −2 for OER and HER, respectively, providing it as a promising electrocatalyst for water splitting reaction. In addition, we deeply studied the synergistic catalytic mechanism of NiFe-LDH/FeCoS 2 /CFC, explaining the reasons leading to the improved catalytic performance of HER and OER. Graphic abstract
研究领域:
材料科学
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电化学
✓ 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.
研究领域:
材料科学
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能源存储技术
✓ 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）