CHEMICAL PHYSICS LETTERS
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2021
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IF 2.328
Xinyu Liu,Jing Xu,Lijun Ma,Ye Liu,Linying Hu
The research work of photocatalytic decomposition of water to produce hydrogen is wider and wider. A highly efficient composites photocatalyst was prepared by hydrothermal method. The composite photocatalyst was composed of spherical CoS x and layered nanosheets of MgAl-LDH. The composite photocatalyst retained the advantage of a wide range of visible light absorption, and can effectively prevent the photocorrosion phenomenon caused by sulfide. The hydrogen production of composite photocatalyst was 262.5 μmol. Compared with MgAl-LDH and CoS x , there was a significant improvement. The combination of the two accelerated the separation of photogenerated electrons and holes, which made the hydrogen production effect of the composite catalyst obvious. To investigate the stability of the composite catalyst, a cycle test was carried out and it showed good stability during the test. According to PL, XPS, XRD, TEM, SEM, UV–Vis DRS and electrochemical characterization, the possible reaction mechanism was proposed. A high performance photocatalyst for hydrogen production with low cost MgAl-LDH combined with CoS x had been explored, which provided a convenient way for research work.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Inorganics
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2025
·Vol. 13
·期 3
·88
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IF 3
Jingjing Dai,Guofei Li,Yuanyuan Wang,Cancan Zhang,Hui Nan,Guijun Yang
During the process of producing potassium fertilizer from salt lake resources, a large amount of waste liquid brine, rich in raw materials such as magnesium chloride, is generated. In this work, a MoS2/MgAl-LDH composite material was constructed using the secondary hydrothermal technique. Characterizations including X-ray diffractometer (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) confirmed the distribution of MoS2nanosheets on the surface of MgAl-LDH. Under full-spectrum irradiation, the degradation efficiency of Rhodamine B reached 85.5%, which was 69.2% higher than that of MgAl-LDH alone. The results from the electrochemical, UV-Vis, and XPS-VB tests indicate that the internal electric field accelerated the separation and transportation of charge carriers between MoS2and MgAl-LDH. These findings demonstrate the great potential of MoS2/MgAl-LDH as a photocatalyst in the degradation of organic dyes, which will aid in the green recycling utilization of magnesium resources from salt lake by-products.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
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2020
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IF 7.888
Chenyuan Guo,Shuguang Shen,Meina Li,Ying Wang,Jing Li,Yuanquan Xing,Cui Wang,Huajie Pan
A rapid and efficient synthesis strategy of MgAl-LDH was proposed. MgAl-LDH with high specific surface area was synthesized in situ by using η -Al 2 O 3 as carrier, and the synthesis time was greatly shortened by both increasing temperature and introducing ethanol as co-solvent. Besides, the growth process of MgAl-LDH on the surface of η -Al 2 O 3 is also revealed. Under optimized conditions, the specific surface area of the MgAl-LDH is as high as 172.4 m 2 /g, the crystalline size is as small as 12.82 nm, and the basicity can reach 1.795 mmol/g. The urea wastewater was degraded from 8000 mg/L to 6.85 mg/L over the catalyst synthesized by the rapid method, and the catalyst still maintains high activity after four uses. Also, it was found that there is a good linear relationship between the urea removal rate and the basicity of MgAl-LDH.
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
CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Cui Baoyu,Cui Jiehu,Liu Chang,Fang Jiamin,Wang Shuxia,Du Xiuhong,Li Zhen
Epoxy resin (EP) is used in construction materials due to its low curing shrinkage, excellent chemical stability, and mechanical properties. However, its flammability limits applications in the field of construction. Co-precipitation method with sodium hydroxide as the alkali source and hydrothermal method with urea as the alkali source are the common ways to prepare MgAl-LDH. In this study, MgAl-LDH1 (abbreviated as LDH1) was prepared by using NaOH as the alkali source at 65 ℃ for 12 h, MgAl-LDH2 (abbreviated as LDH2) by using urea as the alkali source at 120 ℃ for 12 h, and MgAl-LDH3 (abbreviated as LDH3) was prepared by using triethanolamine as the alkali source at 100 ℃ for 2 h. Then, LDH1, LDH2, LDH3 were compounded with ammonium polyphosphate (APP) to synergistically enhance the flame retardant properties of EP (Composite material abbreviated as LDH1-APP-EP, LDH2-APP-EP, LDH3-APP-EP). The results showed that the best flame retardant effect was achieved after compounding APP (5 wt%) with LDH3 (5 wt%) prepared with triethanolamine as the alkali source. Compared with Pure-EP, the peak exothermic rate and peak smoke production rate of LDH3-APP-EP prepared with triethanolamine as the alkali source decreased by 74.54 % and 67.44 %, respectively. Compared with LDH prepared with NaOH and urea as the alkali source, LDH prepared with triethanolamine as the alkali source has a larger layer spacing and a higher weight loss percentage which releases more gases, moisture, and carbon layers formed by triethanolamine during the combustion process to reduce the heat release from the fire. It’s evident that LDH3-APP-EP prepared with triethanolamine as the alkali source has higher residual carbon densities and the lowest residual carbon values based on SEM and Raman test results. This result proves that the LDH3 with triethanolamine as the alkali source has a good effect on EP flame retardation in this paper which provided a new way to design new efficient flame retardants.
研究领域:
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2024
·Vol. 31
·期 28
·41032-41045
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IF 0
Sun Ying,Wang Zexu,Zhang Shijie,Liu Chuyin,Xu Yunfeng
The problem of soil and water contamination caused by Cr(VI) discharged from the dyeing, electroplating, and metallurgical industries is becoming increasingly serious, posing a potentially great threat to the environment and public health. Therefore, it is crucial to develop a fast, efficient, and cost-effective adsorbent for remediating Cr-contaminated wastewater. In this work, MgAl-LDH/commercial-activated carbon nanocomposites (LDH-CACs) are prepared with hydrothermal. The effects of preparation and reaction conditions on the composite properties are first investigated, and then its adsorption behavior is thoroughly explored. Finally, a potential adsorption mechanism is proposed by several characterizations like SEM–EDS, XRD, FTIR, and XPS. The removal of Cr(VI) reaches 72.47% at optimal conditions, and the adsorption study demonstrates that LDH-CAC@1 has an extremely rapid adsorption rate and a maximum adsorption capacity of 116.7 mg/g. The primary removal mechanisms include adsorption-coupled reduction, ion exchange, surface precipitation, and electrostatic attraction. The reusability experiment illustrates that LDH-CAC@1 exhibits promising reusability. This study provides an effective adsorbent with a remarkably fast reaction, which has positive environmental significance for the treatment of Cr(VI) 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
PubMed
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
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Mingyu Wang,Honglin Kuang,Lu Zhou,Mengru Shan,Sihao Jiang,Danying Ma,Shiwen Lv,Yanqing Cong,Yingqi Song,Yi Zhang
Sea urchin-like Cu x S nanoflowers were prepared on copper foam substrate by in situ thermal oxidation and hydrothermal vulcanization. Then, thiophene (Th) was copolymerized with MgAl layered double hydroxide (MgAl-LDH) on Cu x S to obtain a polythiophene (PTh)/MgAl-LDH@Cu x S composite photocathode. Under visible-light irradiation, the electrode exhibits high photocurrent response and excellent stability for 72 h. Under an applied voltage of 3 V, the photogenic carrier was effectively separated, and combined with the graphite anode to generate highly oxidizing reactive oxygen species (ROS) and active chlorine directly and indirectly, which can achieve logarithmic inactivation of 7.57 and 7.07 log 10 CFU/mL against Escherichia coli and Bacillus subtilis within 15 and 25 min, respectively. The mechanism of photoelectrocatalytic reaction for disinfection was explored through cell membrane integrity, DNA/protein leakage and active substances analysis, and a free radical capture experiment proved that O 2 ∙– and h + played key roles in the disinfection process. The purification and degradation of different actual wastewaters show that the photoelectrocatalytic system has great practical application potential in water disinfection.
研究领域:
环境科学
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材料科学
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微生物学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Tailong Cai,Xiaoyuan Shen,Erzhuo Huang,Yutao Yan,Xiaoping Shen,Fengqiang Wang,Zhe Wang,Qingfeng Sun
Wood is an important and ubiquitous material applied in building and decorative applications, but it is easily invaded by fire, water and microorganisms. In this study, a new Ag nanoparticles supported on MgAl-LDH decorated wood veneer is successfully developed via simple hydrothermal reaction and silver mirror reaction. This unique wood veneer shows excellent flame retardancy under a continuous open flame, and super water repellency with a large water contact angle of 156°. In addition, the wood veneer has admirable antimicrobial activity (e.g. Staphylococcus aureus and Escherichia coli ). This paper presents a novel route of synthesizing a well-designed wood based composite with enhanced flame retardancy, water repellency and antimicrobial activity, which greatly broadens the application range of wood.
研究领域:
材料科学
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化学工程
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生物学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2022
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IF 4.644
Chun Sun,Yinke Wang,Lixu Wu,Jun Hu,Xinqi Long,Hongtao Wu,Feipeng Jiao
MgAl-LDH/(BiO) 2 CO 3 p-n heterojunction nanocomposite was prepared using a hydrothermal method . The as-prepared MgAl-LDH/(BiO) 2 CO 3 composites were characterized through XRD , SEM&EDX, TEM , FT-IR, XPS , as well as UV–vis DRS . The photodegradation activity of MgAl-LDH/(BiO) 2 CO 3 was examined through the degradation of tetracycline under visible light irradiation. The maximum degradation efficiency (97.2%) was achieved among the heterostructures when the percentage of MgAl-LDH was 15%. Moreover, the degradation efficiency of MgAl-LDH/(BiO) 2 CO 3 still reached 88% after five successive cycles. Furthermore, a photocatalytic mechanism involved was proposed by exploring its energy band structure . In this study, a novel method for photocatalytic degradation of tetracycline was proposed.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Shucheng Liu,Ming Li,Yi Tang,Xiaogang Wen
A novel Fe 3 O 4 /MgAl-TA LDH (FTLDH) nanocomposites with tartrate anion-intercalation is successfully synthesized by a one-step hydrothermal process. The synthesized FTLDH are flower-like hollow microspheres composed of nanosheets with an average thickness of 25 nm. The specific surface area of the calcined FTLDH (FTLDH-C) greatly increases to 120 m 2 /g, exposing more adsorption sites which can bind the target adsorbates. The adsorption capacities of obtained hollow microspheres towards Congo Red (CR), Malachite Green (MG) and Neutral Red (NR) can reach 1520, 819 and 929 mg/g at room temperature, 2590, 1041 and 1153 mg/g at 45 °C, receptively. The excellent dye adsorption performance can be attributed to the unique hollow and porous microstructure, trumpet-shaped through channels in shell layer and high specific surface area. The dye adsorption process on FTLDH-C hollow microsphere is in accordance with Langmuir isotherm and pseudo-second-order kinetic models. The adsorption is mainly driven by electrostatic attraction (CR) and the hydrogen bonds/π-π conjugation etc. chemical interaction (CR, MG, NR etc.) between dye molecules and LDH nanoflakes. Due to the presence of magnetic Fe 3 O 4 nanoparticles in the nanocomposites, the used adsorbent can be easily recollected with magnetic field. This study puts forward a new way to develop high-performance adsorbent via microstrucure-design and magnetic functionalization.
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
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Qiaohan Li,Hui-qiang Li,Qian Rao,Ping Yang
The concentrated liquor of gas field wastewater (CL-GFW) obtained by cryogenic multi-effect distillation is high-concentration organic wastewater. The MgAl-LDH@Fe 3 O 4 particles were successfully synthesized as the catalysts of the heterogeneous electro-Fenton (EF) system to effectively degrade refractory organic pollutants in the CL-GFW. The particles broadened the pH range of the EF process under optimal conditions. The highest COD removal efficiency could achieve 88.18% after 4 h with pH of 5. The mesoporous particles were systematically studied via a series of characterization techniques. The heterogeneous degradation mechanisms were explored by radical quenching experiments, variation of H 2 O 2 and Fe ion concentrations , and X-ray photoelectron spectroscopy (XPS) analysis. The results indicated that the synergistic effects of the active free radical oxidation , enhanced catalysis, and surface complexation contributed to the degradation of recalcitrant organics in the heterogeneous EF process. Electrocatalysis and homogeneous EF trials exhibited lower COD degradation rates of 45.68% and 62.86% comparing with the heterogeneous EF. The representative refractory organics before and after the heterogeneous EF reaction were identified by GC-MS and HPLC-MS methods. The excellent stability and reusability of the particles in the heterogeneous EF system were verified through five cyclic experiments with low sludge production and metal leaching rate.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2021
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IF 6.064
Manyi Huang,Guangming Lu,Jibin Pu,Yujie Qiang
Layered double hydroxides (LDHs) have been widely used as “smart” containers in the field of metal corrosion protection, and have broad industrial prospects. It is environmentally friendly and feasible to use aliphatic carboxylates and corresponding acids as substitutes for harmful corrosion inhibitors. However, previous studies rarely involved comparing the anti-corrosion mechanisms of different aliphatic acids modified on the LDH surface, and the durability of the prepared coatings also needs to be improved. In this work, MgAl-LDH laminates were grown in situ on AZ31 substrates by a hydrothermal method, and then modified by sodium laurate (SL) and sodium dodecylbenzene sulfonate (SDBS). Due to the physical barrier effect of the LDH layers, the spatial repulsion effect of the air film and the ion exchange reactions in the interlayer galleries, the functional coatings prepared exhibit smart and superior anti-corrosion performance on the magnesium substrates in 3.5 wt.% NaCl solution. Compared with LDH-SDBS-8 coating, the obtained superhydrophobic LDH-SL-8 coating shows more excellent long-term corrosion protection owing to the stronger intercalation capacity.
研究领域:
材料科学
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腐蚀工程
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表面化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）