Journal of Environmental Chemical Engineering
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2026
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IF 7.5
Mengzhen Du,Tao Niu,Ximin Wang,Chenxin Xie,Fei Li
Traditional oil-water separation technologies are often ineffective for various types of highly stable oil-water emulsions. In this study, magnesium aluminum layered double hydroxide (MgAl-LDH) and fluorosilane (CF₃-Si-O-) were introduced into carbon fiber cloth (CC) via a combination of the hydrothermal method and the impregnation method. By leveraging the synergistic effect of micro-nano structures and functional groups, superhydrophobic and superoleophilic carbon-based composites (denoted as CMAF) with excellent oil-water separation performance were successfully fabricated. The resulting CMAF exhibits a water contact angle (WCA) of 158°, achieves a separation efficiency of 99% for water-in-oil (W/O) emulsions, and delivers a treatment flux of 386.86 L·m⁻²·h⁻¹. In addition, CMAF demonstrates good cyclic stability and environmental adaptability: it maintains a separation efficiency of over 99% after 10 cycles, and retains stable hydrophobicity across a wide pH range. This material offers a new solution for efficient oil-water separation and holds broad application prospects.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2026
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IF 4.9
Yanling Hu,Yanshu Chen,Ruitong Li,Ximan Wang,Sigen A,Yunfeng Wu,Dehui Bian,Siqi Bao
Constructed an S-scheme g-C 3 N 4 /Ce-MgAl-LDH heterojunction via hydrothermal method. • Achieved complete TC-HCl degradation in 20 min under visible light with H 2 O 2 synergy. • Identified superoxide radicals as dominant species and proposed three degradation pathways. • Revealed enhanced charge separation via Ce doping and S-scheme interfacial transfer. • Demonstrated 85.3% stability after five cycles with reduced ecotoxicity of intermediates. Antibiotic contamination, especially by tetracycline hydrochloride (TC-HCl), presents significant environmental and health challenges. In this study, a 3D flower-like g-C 3 N 4 /Ce-MgAl-LDH composite was synthesized for effective TC-HCl degradation. In situ XPS and DFT calculations confirmed that the formed S-scheme heterojunction enhances charge separation while maintaining strong redox capabilities. Response surface methodology (RSM) identified pH as the key factor influencing degradation efficiency. Under optimized conditions, the catalyst achieved complete TC-HCl removal within 20 min and a mineralization efficiency of 39.8% based on TOC analysis. Quenching experiments and EPR spectroscopy revealed superoxide radicals (·O 2 - ) as the primary reactive species. The composite also demonstrated excellent environmental adaptability, broad-spectrum activity, and cyclic stability, retaining 85.3% of its activity after five successive cycles. This work combines an advanced S-scheme photocatalyst design with RSM-guided optimization, offering a practical strategy for antibiotic wastewater treatment. Mechanism diagram of TC-HCl degradation in the CN/LDH-15%/H 2 O 2 /Vis system Download: Download high-res image (190KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
You Wang,Lijuan Qiao,Derui Zhu,Junjie Yu,Feiyan Chen,Riming Hu,Yongcheng Li,Benhua Xu,Denglong Lu,Li Gao,Guanshun Xie,Peng Zhang,Bingxin Liu
Layered double hydroxides (LDHs) hold promise for lithium (Li) extraction from salt-lake brines, owing to their distinctive layered structure and ion-exchange capability. However, the challenge of precisely modulating their electronic structure limits adsorption selectivity and capacity toward lithium-ion (Li + ). Herein, MgAl-LDH nanosheets are anchored on graphene oxide (GO) (GO@MgAl-LDH) via an in-situ growth method to achieve efficient Li + extraction. The experimental and theoretical calculations pinpoint that the hyperfine coupling interaction between GO and MgAl-LDH modulates the electronic structure of interlayer CO 3 2− in MgAl-LDH, thereby optimizing the active sites for Li + adsorption. This hyperfine coupling interaction endows the optimized GO@MgAl-LDH composite with a maximum adsorption capacity of 12.96 ± 0.50 mg·g −1 in simulated salt-lake brine, which is 3.00 and 4.56 times higher than those of pure MgAl-LDH (4.31 ± 0.35 mg·g −1 ) and GO (2.84 ± 0.46 mg·g −1 ), respectively. Practical applications in 11 representative salt-lakes across the Qinghai-Tibet Plateau of China demonstrate that the GO@MgAl-LDH maintains remarkable Li + adsorption performance in real brines, with a maximum adsorption capacity of 5.92 ± 0.18 mg·g −1 in East Taigener Lake. Ecological assessments based on microbial diversity and water quality analyses exhibit that the GO@MgAl-LDH does not induce water quality deterioration, thus ensuring its environmental safety and compatibility.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Pengqi Zhu,Mengting Gao,Jin Zhang,Zhiwei Wu,Ruiyi Wang,Yunwei Wang,Eric R. Waclawik,Zhanfeng Zheng
Coordinated Ru species, Ru/LDH, were applied to the reduction of carbonyl compounds via blue light irradiation under mild (45 °C, atmospheric argon pressure), ligand-free, and additive-free conditions. LDH can act as an efficient base catalyst to assist in formation of isopropoxide, requiring no additional base, because basic OH groups form an ordered distribution on LDH surface. The coordinated Ru species containing one OH and three oxygen atoms ligands deriving from the OH groups of LDH are a crucial component, for securing the active electron-deficient Ru species that favours formation of Ru-isopropoxide. The photocatalytic activity is related to the adsorption capacity of isopropyl alcohol near the electron-deficient Ru species and the formation of Ru-isopropoxide. The strong-metal-support interactions between Ru and LDH affect the coordination and the electronic surroundings of the Ru centres and have a significant effect on the photocatalytic activity.
研究领域:
化学
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材料科学
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催化反应
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Fang Chengqian,Dai Yimin,Chen Ling,Wang Zhiheng,Lu Qi,Li Yaqi,Cai Ling,Liu Bo,Zhang Yue-Fei,Li Yan,Wan Li
A magnetic Cl − -intercalated Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH nanocomposite has been successfully synthesized by modified one-step salt-assisted coprecipitation process. The Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH nanocomposite was characterized by FTIR, XRD, XPS, SEM, HRTEM, BET and VSM. The results showed that the Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH particles possessed core (Fe 3 O 4 @SiO 2 ) shell (Cl − -LDH) structures and magnetic properties, and Cl − anions were successfully introduced into LDH interlayers. The unique intercalated structure with week interlayer interaction of Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH provide efficient adsorption of methyl orange (MO), Congo red (CR) and methyl blue (MB), leading to its superior performance with much higher uptake capability with the maximum adsorption capacity of MO, CR and MB reaching 733 mg·g −1 , 910 mg·g −1 and 385 mg·g −1 , respectively. The adsorption process could be well described by pseudo-second-order model for MO, CR and MB. The experimental data of MO and CR could be fitted better with Freundlich model, while that of MB were fitted better with Langmuir model. The adsorption process was spontaneous and exothermic for MO and MB, while spontaneous and endothermic for CR. Moreover, the adsorbent exhibits excellent stability and reusability in the regeneration cycle, and a process called ‘‘post-processing step” is proposed to effectively improve the dye removal ability of the adsorbent in reuse. This study puts forward a new thought for the development of high-performance LDH adsorbents with mesoporous and Cl − intercalation structure for the efficient and rapid removal of dyes.
研究领域:
环境科学
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材料科学
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高影响因子
Journal of Water Process Engineering
·
2025
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IF 6.7
Jianchun Qin,Wenlin Zhao,Wensheng Zhao,Gao Cheng,Xiuxian Huang,Yuan Liu,Jiebing He,Xing Wei,Shunyan Ning,Lin Yu
Uranium (U) contamination in natural waters poses a serious threat to both ecosystems and human health. However, the efficient adsorption and separation of U(VI) remains significantly challenging due to its extremely low concentrations and the complexity of coexisting ions. Herein, we demonstrated that MgAl-LDH/CNT composites with synergistic interfacial properties were successfully synthesized via a hydrothermal method, enabling efficient adsorption and separation of U(VI) from various natural waters while maintaining excellent chemical stability and anti-interference capacity. The evaluation of adsorption performance indicated that U(VI) adsorption by MgAl-LDH/CNT composites reached equilibrium within 10 min at pH 3, exhibiting a maximum adsorption capacity of 126.4 mg/g at 298 K. Furthermore, MgAl-LDH/CNT composites exhibited excellent resistance to coexisting ions, maintaining the adsorption efficiency over 95 % after five adsorption-desorption cycles. The adsorption mechanism studies based on FT-IR, XPS, and DFT revealed that the -OH function groups in MgAl-LDH/CNT composites were involved in U(VI) complexation with a binding energy of 3.69 eV. U(VI) was preferentially enriched on the MgAl-LDH surface and its interface with CNT, confirming the interface-dominated adsorption mechanism of MgAl-LDH/CNT composites. This work provides a promising strategy for efficient adsorption and separation of U(VI) from natural waters, while offering valuable insights into environmental remediation and sustainable nuclear resource management.
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RSC Advances
·
2021
·Vol. 11
·期 31
·19128-19135
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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.
研究领域:
材料科学
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电气工程
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纳米技术
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
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IF 4.2
Rongrong Li,Wenqi Liu,Huibin Liu,Hongyu Niu,Quan Zhou,Changhai Liang,Xiao Chen
One-pot hydrogenation of biomass-derived furfural with multiple reduction sites requires suitable metal sites to achieve a high value-added chemical in high yield. In this work, nonprecious Ni–Fe bimetallic catalysts with high efficiency derived from FexNiy/MgAl-LDH hydrotalcite precursors are prepared for one-pot sequential hydrogenation of furfural to tetrahydrofurfuryl alcohol at mild conditions. Through fine adjustment of metallic Fe/Ni molar ratios in hydrotalcite precursors, bimetallic FexNiy/MgAlO catalysts can be constructed. The topological transformation of hydrotalcite precursors provides a mesoporous structure for bimetallic supported catalysts. Due to the formation of the Ni–Fe alloy, there is an electron transfer from Fe to Ni in the catalyst due to the higher electronegativity of Ni than that of Fe, which greatly influences the adsorption of furfural on the surface of catalysts. Comparing the structures and catalytic performances of monometallic Ni/MgAlO and Fe/MgAlO catalysts, the Ni-rich Fe1Ni4/MgAlO catalyst with the dual active sites of metallic Ni and FeNi3 alloy presents high efficiency in sequential hydrogenation of the C═O bonds and C═C bonds of furfural to tetrahydrofurfuryl alcohol with the yield of 90.3% under 3 MPa H2 and 80 °C for 3 h, which can be an alternative for noble metal catalysts. Additionally, the Ni-rich Fe1Ni4/MgAlO catalyst presents excellent cycling stability. This design strategy for nonprecious NiFe bimetallic catalysts not only provide promising candidates for effective utilization of biobased furfural but also extend the application of bimetallic catalysts derived from hydrotalcite precursors for one-pot hydrogenation reactions.
研究领域:
催化
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化学工程
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材料科学
·
绿色化学
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
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IF 7.65
Xiaoshu Lv,Xiaofeng Qin,Kaifeng Wang,Yiyin Peng,Peng Wang,Guangming Jiang
The scaled application of nanoscale zero-valent iron nanoparticles (nZVI or Fe° NPs) in environmental remediation is challenged by easy surface passivation and particle aggregation. To improve this situation and enhance their performance in Cr(VI) removal from water phase, we present one novel strategy to hybridize nZVI with layered double hydroxide (LDH) decorated reduced graphene oxide (rGO). The as-prepared ternary (Fe@LDH/rGO) composites possess better dispersibility, improved hydrophilicity and more positive surfaces that allows higher removal efficiency and capacity for Cr(VI) oxyanions. Composition proportion are optimized and influences of surroundings (solution pH, Cr(VI) concentration and temperature) are evaluated. Also, we demonstrate that Fe@LDH/rGO can be reused with suitable post-treatments, which combines alkaline solution desorption and NaBH 4 revivification possess. Cr desorption and Fe leaching ratio during regeneration should be critical indicators that determine the recovery efficiency. Synergistic effect within this ternary system not only contributes to its superiorities in stability, but also continuous iron corrosion via the formation of micro Fe-C batteries, where rGO acts as cathode and alternative electron conductor. The present work suggests great potentials of Fe@LDH/rGO composites in groundwater remediation.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2021
·
IF 8.067
Ting Hu,Yuejun Ouyang,Zhi-Hui Xie,Liang Wu
Current corrosion-resistant layered double hydroxide (LDH) coating on Mg alloy is usually in situ grown in autoclave by hydrothermal methods under high temperature and high-pressure conditions, which is unfavorable for industrial application. We report that an inhibitor (2-mercaptobenzothiazole, MBT) incorporated composite (MgAl-LDH/MBT) coating can be in situ deposited on bare AZ31 Mg alloy surface with the assistance of a chelating agent (ethylenediaminetetraacetic acid) under a relatively low temperature (95 °C) and ambient pressure by a one-pot method. The successful formation of LDH/MBT composite coating is confirmed by a series of characterizations, such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and energy dispersive spectroscopy (EDS). The corrosion resistance of the composite coating is evaluated by means of hydrogen evolution measurement, electrochemical impedance spectroscopy (EIS), Tafel polarization curves, and neutral salt spray test. The tests show that the LDH/MBT composite coating has a very low corrosion current density (1.73 10 −8 A cm −2 ), an extremely high charge transfer resistance (2.336 MΩ cm 2 ), and does not show any corrosion pits even after 15 d of exposure to a NaCl solution or 7 d of exposure to salt fog environment, manifesting the good and robust corrosion protection. Lastly, the deposition and corrosion protection mechanisms of the MgAl-LDH/MBT composite coating are also discussed and proposed based on the EDS characterization of the coating after long-time exposure.
研究领域:
材料科学
·
腐蚀与防护
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高影响因子
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
·
2023
·Vol. 74
·期 5
·754-765
·
IF 1.8
Xing Han,Yongqin Wang,Jia Hu,Tianbing Xiao,Jianjun Li
We reported the realization of superhydrophobic layered double hydroxide (LDH) coating with the double-anticorrosion mechanism on magnesium alloys. This coating was prepared via in-situ growth of LDHs on the etched AZ31 alloy and the modification was caused by 1H, 1H, 2H, 2H-perfluorooctyltrimethoxysilane. The water contact angle on the coating was as large as 161°, possessing the two-scale rough structure consisting of microislands and LDH crystal nanosheets. The excellent corrosion resistance properties of the superhydrophobic LDH coating can be attributed to the double-anticorrosion mechanism associated with LDH coating and superhydrophobic structure. In addition to the active protection of LDH coating, the passive protection of superhydrophobic coating can suppress the occurrence of ion-exchange reactions, leading to excellent corrosion resistance stability.
研究领域:
材料科学
·
腐蚀与防护
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高影响因子
BIOELECTROCHEMISTRY
·
2026
·
IF 4.9
Lan Jiang,Lina Zou,Jing Dong,Ping Zhang,Jian Zhou,Hao Jiang,Huanyu Ren,Huiru Niu,Hao Liao,Xiaojing Zhang,Shanshan An,Fei Ren,Xiuhong Ge,Feiyan Yang,Lang Cheng,Hongzhi Pan,Shengzhong Rong,Hongkun Ma
Non-coding RNAs are critical tumor biomarkers, rendering innovations in their detection technologies highly significant. To overcome the limitations of conventional single-signal electrochemical biosensors (susceptibility to interference, insufficient stability), this study developed a novel ratiometric electrochemical DNA biosensor with dual-signal amplification. Its core novelty is the rational integration of two synergistic nanomaterials: Ferrocene-functionalized MgAl-layered double hydroxide (Fc@MgAl-LDH, as stable immobilization matrix and internal reference signal source) and AuNPs@Fc@MgAl-LDH coupled with MB-cDNA@AuNPs, which construct a cascaded signal amplification pathway. The sensing mechanism involves two-stage amplification: Primary by high-loading-capacity AuNPs@Fc@MgAl-LDH, secondary by MB-cDNA@AuNPs hybridizing with electrode-immobilized microRNA-21 (miRNA-21). The ratiometric signal ( I MB / I Fc ) enables built-in correction, boosting detection accuracy and reproducibility. After systematic optimization, the sensor has a wide linear range (1.0 fM–0.1 nM) and an ultra-low LOD of 0.757 fM, eliminating RNA extraction/enzymatic amplification to simplify operation. Serum validation shows high accuracy (95.3%–101.4% recovery), indicating strong clinical diagnostic application potential.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）