COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Hui-qiang Li,Mei-yu Zhang,Ke-xin Zhou,Ping Yang,Zhi-wei Gan,Zhi Li
s Iron-based catalysts are widely used in the electro-Fenton technology, which are limited by strict acidic conditions. Cobalt-based catalysts can undergo Fenton-like reactions with H 2 O 2 under neutral conditions. In this study, a CF@Co 2 NiO x @MgAl-LDH cobalt-based bimetallic catalyst was prepared to study 1-hydroxyethylidene-1 (HEDP) and methylisothiazolinone (MIT) degradation performance in a heterogeneous electro-Fenton system. Cobalt-based bimetallic oxides were first modified with magnesium-aluminum hydrotalcite (MgAl-LDH) and subsequently loaded onto carbon felts (CF) to reduce metal ion leaching and improve catalyst recyclability. The experimental results showed that CF@Co 2 NiO x @MgAl-LDH could effectively remove 93.06% of HEDP and 92.42% of MIT after 2 hours of reaction. Removal of HEDP and MIT was still achieved at 78.62% and 81.09% after four cycles of experiments. Based on the catalyst characterization results, the reasons for the differences in the pollutant removal performance were analyzed and the optimal operating parameters of the CF@Co 2 NiO x @MgAl-LDH for the removal of HEDP and MIT were investigated. This study provides a novel and sustainable strategy for the design and application of cobalt-based catalysts.
研究领域:
环境化学
·
催化科学
·
水污染控制
·
材料化学
·
环境工程
·
应用电化学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2019
·
IF 1.293
Xinyao Li,Jinjuan Xue,Shuaishuai Ma,Peng Xu,Chengjuan Huang,Mingxin Wang
A novel heterojunction photocatalyst consisting of three-dimensional (3D) flower-like MgAl LDH and acidified g-C 3 N 4 (CN-H) was first developed by a simple facile coating method. The obtained MgAl LDH/CN-H samples were thoroughly characterized by powder X-ray diffraction (XRD), UV–Vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence spectroscopy (PL), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS) and Brunauer–Emmett–Teller (BET) analyzer. The detailed results demonstrated that g-C 3 N 4 could transform from a generally two-dimensional layered structure into special cavity-like structure after acid treatment. CN-H increased specific surface to expose more active reaction sites in comparison to pristine g-C 3 N 4 . MgAl LDH and CN-H with matched band gaps were tightly bonded to form heterojunction structure by strong electrostatic intercalation. The combination could obviously boost the separation of photogenerated carriers. The as-prepared MgAl LDH/CN-H exhibited high photocatalytic performance in the degrading on typical antibiotic tetracycline hydrochloride (TC ⋅ HCl), of which degradation rate was 6.5 and even 22 times higher than that of MgAl LDH and pristine g-C 3 N 4 , respectively. The synthesis of MgAl LDH/CN-H heterojunction photocatalyst could have some positive suggestions for the rational construction of new photocatalysts and also has great application prospect in the degradation of environmental pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Ran-ran Shan,Liang-guo Yan,Kun Yang,Shu-jun Yu,Yuan-feng Hao,Hai-qin Yu,Bin Du
Magnetic material as adsorbent can provide effective remove and quickly separate of pollutant in wastewater treatment. A magnetic Fe 3 O 4 /MgAl-layered double hydroxide (LDH) composite was prepared by low saturation coprecipitation in the dispersed Fe 3 O 4 suspension. The characterization of XRD, TEM and FTIR revealed that the Fe 3 O 4 /MgAl-LDH composite was combined with Fe 3 O 4 and MgAl-LDH. This provided the composite of magnetic property which improved the separation of solid from aqueous solution. The adsorption of reactive red (RR), congo red (CR) and acid red 1 (AR1) by magnetic Fe 3 O 4 /MgAl-LDH composite depended upon the adsorbent dosage, contact time, initial concentration and temperature. The adsorption of the three red dyes reached equilibrium at 30 min and followed the pseudo-second-order kinetic equation. The equilibrium adsorption isotherm data well fitted the Langmuir model for RR, Freundlich model for CR and AR1. Thermodynamic results demonstrated that the adsorption processes were spontaneous, endothermic for RR and CR or exothermic for AR1. The adsorption capacities changed insignificantly between solution pH 2–10 and the maximum were 97, 253 and 92 mg/g for RR, CR and AR1, respectively. Moreover, the solid composite can be quickly separated from the aqueous solution by an external magnet before and after adsorption process. This indicated that the magnetic Fe 3 O 4 /MgAl-LDH composite was an effective adsorbent for red dyes removal with quick separation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Qi Guo,Tengle Wang,Tian C. Zhang,Like Ouyang,Shaojun Yuan
The practical applications of magnesium alloys are significantly limited owing to being susceptible to corrosion. In this study, superhydrophobic double layered MgAl-LDH/epoxy (DMALE) composite coatings were fabricated on magnesium alloys by the combination of hydrothermal synthesis and spraying methods, which consisted of a bottom layer of MgAl-LDH(WO 4 2− )/epoxy coating and a top layer of superhydrophobic hexadecyltrimethoxysilane (HDTMS)-modified MgAl-LDH(CO 3 2− )/epoxy coating. The as-prepared DMALE coating delivered superior superhydrophobic and self-cleaning property. Such composite coating was demonstrated to possess good anticorrosion property, good chemical stability, and high abrasion resistance. This large-scale prepared composite coating is potentially useful for corrosion protection of magnesium alloys.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Jiaoyang Mi,Wenhui Zhang,Jiao Han,Yuqin Fu,Wenjing Zhu,Ying Liu,Xiuran Wang,Changli Lü
Layered double hydroxides (LDHs) as carriers of antibacterial agents and catalysts have attracted much attention in the research of antibacterial materials. Herein, a novel hybrid of nanosilver-loaded polydopamine (PDA)-polyethylenimine (PEI)-decorated dissected LDH nanosheets (dLDH-PDA-PEI-Ag) was successfully constructed as antibacterial material utilizing a simple mussel-inspired surface engineering strategy. dLDH-PDA-PEI-Ag shows good antimicrobial activities against different bacteria including drug-resistant bacteria, Gram-positive and Gram-negative bacteria. Especially, it has excellent cyclic antibacterial properties against S. epidermidis and E. coli. The bactericidal mechanism of dLDH-PDA-PEI-Ag mainly involves the destruction of cell membrane and production of high level ROS in bacterial cells. In addition, the as-prepared dLDH-PDA-PEI-Ag also presents good catalytic reduction properties for methylene blue and p-nitrophenol in a shorter time. This research indicates that dLDH-PDA-PEI-Ag nanohybrid material has broad application prospects in the fields of public health and environmental protection.
研究领域:
材料科学
·
生物学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2023
·
IF 7.5
Jie Xu,Xiaowei Liu,Rui Li,Boxiong Shen,Zijian Zhou,Lidan Deng,Lei Liu,Xinbo Zhu
Converting CO 2 into renewable fuel via photocatalysis is of significance to solving the energy crisis and climate change. However, the limited electron transfer in single catalysts always limits the reduction reaction. In this work, a p-n heterojunction was constructed between Cr doped MgAl–LDH (abbreviated as LDH) and Co 3 O 4 for visible-light-driven fuel production. Since LDH and Co 3 O 4 both have the sufficient potentials to drive CO 2 photoreduction, the constructed type-II heterojunction is more favorable for electron utilization efficiency. The optimal Co 3 O 4 /LDH heterojunction exhibited the highest CO evolution rate of 7.42 μmol•g −1 •h −1 and a CO selectivity of 90.5% with TEOA as sacrificial agent . The further characterizations highlight that the addition of Co 3 O 4 greatly improves the light absorption and the heterojunction effectively promotes the reverse migration of electrons and holes. This work investigates and verifies the designed type-II heterojunction based on MgAl–LDH, which has the guidance for the design of heterojunction catalysts and promotes the practical application of MgAl–LDH in photocatalytic region.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Min Li,Jiang Wang,Feiyu Liu,Xinze Song,Chunmei Su,Jinjia Liu,Shuai Wang,Jingchun Jia,Hongwei Ji,Chuncheng Chen
Fluoride contamination in groundwater and the disposal of spent adsorbents remain critical environmental challenges. Herein, a series of monolithic Ca-containing MgAl layered double hydroxide/polyacrylonitrile nanofiber membranes (Mg 2-x Ca x Al-LDH/PAN) were fabricated via electrospinning, which combine the high adsorption performance of LDH with the exceptional separability of nanofibrous matrices. Mg 1.9 Ca 0.1 Al-LDH/PAN showed 96.2% removal efficiency for 10 mg/L F - and maximum adsorption capacity of 16.7 mg/g at 25 °C in a batch reactor, and achieved a specific treatment rate of 150 L/kg/h in a fixed-bed column. The adsorption mechanisms were elucidated through combined experimental and DFT studies. More importantly, rather than following conventional regeneration routes, the spent fluoride-laden adsorbent was converted through pyrolysis into a fluorine-doped carbon-based electrode material. This upcycled material retained a high-surface-area fibrous structure and exhibited enhanced oxygen reduction reaction (ORR) activity compared to its non-fluorinated counterpart. This work presents an “adsorb-and-transform” paradigm that integrates efficient water decontamination with sustainable recovery of functional materials for energy applications. Download: Download high-res image (184KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jianan Qu,Jinjuan Xue,Yanli Qi,Kaiwen Huang,Mingxin Wang,Yuming Zhou
Passive daytime radiative cooling provides a promising zero-energy solution to reduce energy consumption and carbon emissions in building cooling. While cellulose-based radiative coolers have gained research focus, their efficiency remains constrained by inadequate spectral properties and parasitic heat gain. Herein, a novel silylated bacterial cellulose/MgAl-layered double hydroxide (MBC/LDH) composite aerogel with multi-scale architecture and nano/micro porous structure was fabricated via facile freeze-drying. Within this architecture, 1D bacterial cellulose (BC) nanofibers serve as the matrix, while methyltrimethoxysilane (MTMS) silylation simultaneously enables crosslinking, hydrophobization, and enhanced emissivity through Si-O-Si/Si-O-C bonding. Incorporating 2D MgAl-LDH imparts flame retardancy and further modulates infrared emissivity. This synergistic design yields robust mechanical strength and exceptional optical properties with 96.5 % solar reflectivity and 92.3 % infrared emissivity. Outdoor testing (493.2 W·m −2 solar intensity) achieved a 6.3 °C sub-ambient cooling effect, significantly surpassing pure BC aerogel (1.9 °C). The aerogel also exhibits outstanding flame resistance (LOI = 34.1 %), ultralow thermal conductivity (0.03478 W·m −1 ·K −1 ) and high water contact angle (142°), providing essential thermal insulation, flame retardancy and self-cleaning properties. Year-round simulations demonstrate 41.2 % cooling energy savings when applied to roofs and walls. This work provides a pathway for developing advanced sustainable BC-based composite aerogels for energy-efficient building cooling.
研究领域:
材料科学
·
建筑节能
·
可持续工程
·
纳米复合材料
·
热管理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Qinglei Sun,Bo Chen
The serious pollution of water resources has brought great challenges to human existence; it is urgent to develop adsorbents for removing toxic dyes from wastewater. In this work, we synthesized hierarchically porous MgAl-layered double hydroxide (LDH)/carbon fiber (CF) composites with excellent adsorption of Congo red (CR) by combining the biotemplating and hydrothermal method. The effects of various Mg/Al molar ratios on the X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), and Fourier transform infrared (FT-IR) spectroscopy characterizations and the dye adsorption capacity of composites were investigated. Three-dimensionally stackable MgAl-LDH nanosheets with a Mg/Al molar ratio of 4 were attached uniformly on the surface of hollow carbon fibers calcined from cotton, generating higher crystallization and specific area. The maximum adsorption capacity of Mg4Al-LDH/CF was equal to 271.00 mg g–1 (linear Langmuir model, at 200 mg g–1 CR in 72 h), which was significantly higher than the adsorption capacity of MgAl-LDH synthesized without the use of a biotemplate (linear Langmuir model, 170.35 mg g–1 at 200 mg g–1 CR in 72 h). The adsorption reaction followed the linear pseudo-second-order kinetics as well as the linear Langmuir model. Anion exchange and electrostatic attraction were considered as the main adsorption mechanisms. Mg4Al-LDH/CF still maintained 85.33% of the maximum adsorption capacity after four adsorption–desorption cycles. The adsorbent synthesized by flexible and simple methods might be a competitive candidate to purify nondegradable substances from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
·
2021
·
IF 3.515
Han Xing,Hu Jia,Wang Yong-Qin,Xiao Tian-Bing,Xia Wei,Chen Yan-Ning,Wu Liang
A super-hydrophobic anti-corrosion film was facilely prepared via in situ growth of layered double hydroxides (LDHs) on the etched AZ31 magnesium alloy and then modification by 1H, 1H, 2H, 2H-perfluorooctyltrimethoxysilane (PFOTMS) in this work. The morphology, structure, composition, surface roughness and water contact angles (WCA), and the anti-corrosion performance of the samples were investigated. The results revealed that the micro/nano hierarchical surface morphology of the films was composed of island structures obtained after chemical etching and MgAl-LDH nanowalls grown in situ. The best hydrophobicity (CA = 163°) was obtained on the MgAl-LDHs with the maximum surface roughness. Additionally, the potentiodynamic polarization, electrochemical impedance spectroscopy, and immersion test indicated that the super-hydrophobic LDH films provided better corrosion resistance to AZ31 magnesium alloy due to the double-protection derived from the LDHs and super-hydrophobic properties. Furthermore, the contact angle could be kept at above 140° after dipped in 3.5 wt% NaCl solution for 6 days.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Xingjian Dai,Chuan Jing,Kailin Li,Xiaotian Zhang,Dan Song,Li Feng,Xiaoying Liu,Hui Ding,Haodi Ran,Kangwen Zhu,Nan Dai,Shuang Yi,Jinsong Rao,Yuxin Zhang
A novel H + and Cl − intercalated montmorillonite@MgAl LDH (MMT-N) nanocomposite was prepared by a one-step hydrothermal method following acid-salt treatment. The MMT-N prepared by the advanced modification method contains low CO2–3contamination, high specific surface area, and high porosity. By enhancing the ion exchange of montmorillonite and LDH, efficient removal of anionic and anionic dyes was achieved without the introduction of another cation contamination. The adsorption kinetics of methyl orange (MO) and methylene blue (MB) are in accordance with the pseudo-second-order model, and the maximum adsorption amounts of methylene blue and methyl orange reached 815.998 mg g −1 and 399.836 mg g −1 , respectively. The coefficient of determination (R 2 ) and the corrected Akaike Information Criterion (AICc) revealed that the adsorption isotherm data of MO and MB on MMT-80 fitted well with Freundlich isotherm, signifying that the adsorption process was dominated by chemisorption . And the adsorption of MO and MB by MMA-80 was endothermic and exothermic, respectively. The “intercalation-split mechanism” and “ion exchange” mechanisms of MO and MB in MMA-80 were also investigated. This study provides an efficient method for the synthesis of high-performance bifunctional adsorbents for cationic and anionic pollutants and offers potential applications for practical wastewater purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Qinglei Sun,Mei Tang,Peter Vang Hendriksen,Bo Chen
A novel hierarchically porous magnetic ZnFe 2 O 4 /MgAl-layered double hydroxide (LDH) was reported as an effective adsorbent for the elimination of Congo Red (CR) from water. Three-dimensional stackable MgAl-LDH nanosheets synthesized through hydrothermal method were attached to the surface of ZnFe 2 O 4 microsphere , using the inexpensive, non-toxic, quick and simple bio-template technique. Mg/Al molar ratios played a crucial role in crystal phase synthesis and adsorption capacity. Adsorption kinetics and thermodynamics of CR adsorption by ZnFe 2 O 4 /MgAl-LDH were also investigated. The adsorption kinetics followed the pseudo-second-order. The maximum adsorption capacity (294.12 mg g −1 ) was obtained by the ZnFe 2 O 4 /MgAl-LDH with Mg/Al molar of 2, which was more productive than the base adsorbent without MgAl-LDH attaching (28.58 mg g −1 ). Adsorption isotherm revealed Langmuir-type monolayer adsorption. The adsorption processes were spontaneous and endothermic in nature. Absorbents fabricated in this work could be easily regenerated by rinsing the material in methanol and magnetically separated from the solution. Adsorbent synthesized in this work is very promising composite for purification of water from toxic chemicals.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）