MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jiaqi Liu,Chunning Chen,Jiaxin Lu,Yalei Wang,Jingtong Zhai,Hongkun Zhao,Nan Lu
The sensitivity of surface-enhanced Raman scattering (SERS) highly depends on the number of hotspots under laser spot and the number of analyte molecules near hotspots. Thus, a SERS substrate was constructed by assembling Ag nanocubes on a paper, which was previously modified with molecularly imprinted polymers (MIP) through in-situ polymerization. On the prepared substrate, the density of hotspots and analyte molecules near the hotspots are increased by the high surface area of paper and the modification of MIP. Malachite green (MG) is a toxic and prohibited drug that is very polluted to the environment, so monitor of trace MG is vital in complex environment. The minimum detectable concentration of MG molecules on the paper-based SERS substrate is 3.65 × 10 −3 ng/mL. The relative standard deviation (RSD) is 8.58 % and the EF is approximate to 1.78 × 10 7 . In addition, MG molecules can be accurately detected in the presence of interfering molecules, the imprinting factors of MG is up to 1.69. Furthermore, the substrate can be used for the detection of MG in shrimp leach liquor, and its minimum detectable concentration is as low as 0.365 ng/mL, the RSD is 7.49 %. The above results indicate that this substrate can be used for detecting trace molecule in complex samples.
研究领域:
分析化学
·
纳米技术
·
环境监测
·
表面增强拉曼散射
·
食品安全
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产品关联
DOI
高影响因子
Engineering Reports
·
2025
·Vol. 7
·期 9
·e70327
·
IF 2
Christina H. M. Tsang,Ruilong Zhang,Wei Xiong,Davidraj Johnravindar,Puranjan Mishra,Jun Zhao
The escalating demand for plastics has necessitated advancements in plastic recycling technologies. This study examines the development of heterogeneous metal catalysts aimed at improving the hydrolysis performance of polyethylene terephthalate (PET), a commonly used plastic, and enhancing the conversion efficiency for the efficient production of terephthalic acid (TPA). A series of Mg-Al bimetallic oxide with varying Mg and Al ratios were synthesized and employed as catalysts for the hydrolysis of PET under various conditions, including reaction temperature (80°C–220°C), reaction time (10–300 min), and solvent ratio. Optimization of the process revealed that the optimal conditions for catalytic hydrolysis were achieved at 200°C, 300 min, using a Mg-Al-1 catalyst and a solvent ratio of 5:5 ethanol to water, resulting in a PET conversion efficiency of 95.6% and a TPA yield of 80.3%. Over 70% TPA yield could be generated after first hydrolysis without regeneration. Under hydrothermal conditions, polyethylene glycol instead of ethylene glycol was found after reaction, as identified by liquid chromatography–mass spectrometry (LC–MS). This study offers a sustainable and feasible pathway for TPA recovery from PET, contributing to the advancement of recycling technologies.
研究领域:
环境催化
·
高分子化学
·
资源循环利用
·
绿色化学
·
材料科学
·
工业催化
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiyue Fan,Jie Lin,Yue Sun,Xiangting Hu,Hang Yu,Zhenda Lu
Lithium manganese oxide (LMO) ion sieves are promising for lithium extraction due to their high adsorption capacity. However, their practical application is often limited by structural degradation from manganese leakage, reduced lithium uptake, and poor Li + /Mg 2+ selectivity, especially in brines with high Mg/Li ratios. To overcome these challenges, we in-situ synthesized polyamide (PA) nanofiltration membranes on the surface of LMO using two distinct amine monomers, polyethyleneimine (PEI) and piperazine (PIP), to create novel composite adsorbents LMO@PA(PEI) and LMO@PA(PIP). Both the coated materials demonstrated improved lithium uptake capacity and cyclic stability in adsorption-desorption cycles in simulated brine. More importantly, under a challenging Li/Mg ratio of 1:50 in binary ion solutions, the separation factors (α) of HMO@PA(PEI) and HMO@PA(PIP) were 2.23 and 4.55 times higher than that of uncoated HMO, showcasing excellent Li + /Mg 2+ selectivity. These findings highlight that polyamide nanofiltration layers successfully endow LMO with enhanced capacity, selectivity, and long-term stability, presenting a promising and scalable approach for direct lithium extraction from high‑magnesium salt lakes.
研究领域:
材料科学
·
分离技术
·
能源材料
·
环境工程
·
无机化学
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产品关联
DOI
高影响因子
Inorganics
·
2025
·Vol. 13
·期 8
·261
·
IF 3
Zebin Song,Hao Zhou,Yin Zhang,Haining Ji,Liping Wang,Xiaobin Niu,Jian Gao
The O3-type layered oxide materials have the advantage of high specific capacity, which makes them more competitive in the practical application of cathode materials for sodium-ion batteries (SIBs). However, the existing reported O3-type layered oxide materials still have a complex irreversible phase transition phenomenon, and the cycle life of batteries needs, with these materials, to be further improved to meet the requirements. Herein, we performed structural characterization and electrochemical performance tests on O3-NaNi0.6−xFe0.25Mn0.15MgxO2(x = 0, 0.025, 0.05, and 0.075, denoted as NFM, NFM-2.5Mg, NFM-5.0Mg, and NFM-7.5Mg). The optimized NFM-2.5Mg has the largest sodium layer spacing, which can effectively enhance the transmission rate of sodium ions. Therefore, the reversible specific capacity can reach approximately 148.1 mAh g−1at 0.2C, and it can even achieve a capacity retention of 85.4% after 100 cycles at 1C, demonstrating excellent cycle stability. Moreover, at a low temperature of 0 °C, it also can keep capacity retention of 86.6% after 150 cycles at 1C. This study provides a view on the cycling performance improvement of sodium-ion layered oxide cathodes with a high theoretical specific capacity.
研究领域:
材料科学
·
电化学
·
储能技术
·
无机化学
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产品关联
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Xiaoke Wang,Xixi Zhang,Gang Zhao,Hu Hong,Zijie Tang,Xijin Xu,Hongfei Li,Chunyi Zhi,Cuiping Han
Magnesium ion batteries have potential for large-scale energy storage. However, the high charge density of Mg2+ ions establishes a strong intercalation energy barrier in host materials, causing sluggish diffusion kinetics and structural degradation. Here, we report that the kinetic and dissolution issues connected to cathode materials can be resolved simultaneously using a tetraethylene glycol dimethyl ether (TEGDME)–water hybrid electrolyte. The lubricating and shielding effect of water solvent could boost the swift transport of Mg2+, contributing to a high diffusion coefficient within the sodium vanadate (NaV8O20·nH2O) cathode. Meanwhile, the organic TEGDME component can coordinate with water to diminish its activity, thus providing the hybrid electrolyte with a broad electrochemical window of 3.9 V. More importantly, the TEGDME preferentially amassed at the interface, leading to a robust cathode electrolyte interface layer that suppresses the dissolution of vanadium species. Consequently, the NaV8O20·nH2O cathode achieved a specific capacity of 351 mAh g–1 at 0.3 A g–1 and a long cycle life of 1000 cycles in this hybrid electrolyte. A mechanism study revealed the reversible interaction of Mg2+ during cycles. This organic water hybrid electrolyte is effective for overcoming the difficulty of multivalent ion storage.
研究领域:
储能
·
电化学
·
材料科学
·
电池技术
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DOI
高影响因子
JOURNAL OF ELECTROCERAMICS
·
2026
·
IF 2.6
Zhou Wenjie,Zhang Yun,Yin Zezhen,Yang Jing,Ding Shihua
LiAl 1 − x Mg x O 2− x /2 ( x = 0, 0.01, 0.02, 0.03, 0.04, 0.05) ceramic were prepared by conventional solid-phase reaction method. After X-ray diffraction analysis, a single-phase solid solution was formed in this system throughout the doping range. Through the oxygen vacancies formation by the replacement of Al 3+ with Mg 2+ , the relative density was increased from 94.33% to 96.1%. The dielectric constant ( ε r ) showed a trend of first enhancing and then decreasing with doping concentration. Their relationship mainly depended on the synergistic effect of relative density and dielectric polarizability. The improvement in the quality factor ( Q×f ) from 15,647 GHz to 34,507 GHz was attributed to the increased doping ratio and the strengthened covalent bonds. The change in the temperature coefficient of resonance frequency ( τ f ) was explained from the perspective of oxygen bonding valence. Excellent microwave properties were ε r = 6.59, Q×f = 34,507 GHz, and τ f = -115.8 ppm/°C for LiAl 0.97 Mg 0.03 O 1.985 ceramic at 1325 °C for 5 h.
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产品关联
DOI
高影响因子
ANTI-CORROSION METHODS AND MATERIALS
·
2023
·Vol. 70
·期 3
·129-138
·
IF 1.2
Jiao Li,Tianshu Li,Jodie A. Yuwono,Guozhe Meng,Zhiyuan Feng
Purpose This study aims to develop a sol-gel-based coating to provide a long-lasting corrosion protection on AZ31 Mg alloy. Silane-based sol-gel coatings have been successfully applied to Mg alloys for corrosion protection. However, the micro or nano defects formed during condensation and solidification will cause the coating failure during a long-lasting immersion in a saline solution. More durable corrosion-protective sol-gel coatings are needed. Design/methodology/approach A sol-gel-based coating was modified on AZ31 Mg alloy by levodopa (DOPA). The long-lasting corrosion protection mechanism was studied by multiple electrochemical testing methods and surface characterization techniques. Findings Long-term testing by electrochemical impedance spectroscopy in aqueous 0.1 M NaCl indicated that the modified DOPA@sol-gel coating exhibited significant corrosion protection performance (>14 days). In comparison, the DOPA-free sol-gel coating failed only after three days of testing. The improved corrosion protection is attributed to the self-polymerized DOPA filling to the micro or nano defects in the glassy cross-linked networks of the sol-gel coating, which greatly improves the compactness of the coating. Originality/value The method of this study is simple and easy to process, the raw materials are green and the protective effect is excellent, which is of significance for the study of magnesium alloy corrosion protection.
研究领域:
材料科学
·
腐蚀与防护
·
生物医学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Hang Che,Yuhao Wu,Xinhua Wang,Haizhen Liu,Mi Yan
The Mg(NH 2 ) 2 -2LiH system is considered as one of the most potential hydrogen storage materials due to its high hydrogen storage capacity (5.6 wt%) and excellent reversible hydrogen adsorption and desorption performance. However, its poor kinetic characteristics of hydrogen absorption and desorption limit its practical application. In this work, Li 3 VO 4 @LiVO 2 was synthesized by a hydrothermal method , and was then introduced into Mg(NH 2 ) 2 -2LiH system to enhance the hydrogen absorption and desorption kinetic characteristics. The results show that the hydrogen storage properties were greatly improved with addition of 10 wt% Li 3 VO 4 @LiVO 2 addition. As for the hydrogen absorption and desorption kinetics, the average hydrogen absorption rate of 10 wt% Li 3 VO 4 @LiVO 2 modified Li-Mg-N-H sample within 20 min at 200 ℃ increased by 95.2% compared with that of the pristine Li-Mg-N-H sample, and the average hydrogen desorption rate of 10 wt% Li 3 VO 4 @LiVO 2 modified sample within 30 min at 180 ℃ increased by 42% compared with that of the pristine sample. The E a of hydrogen desorption decreased from 117.86 kJ/mol to 99.43 kJ/mol, which also indicates that Li 3 VO 4 @LiVO 2 catalyst effectively improved the kinetic performance of hydrogen desorption and desorption of Li-Mg-N-H. Moreover, the hydrogen desorption capacity and hydrogen absorption capacity of 10 wt% Li 3 VO 4 @LiVO 2 modified Li-Mg-N-H increased by 18.4% and 13.8% compared with that of the pristine sample. The catalytic mechanism of Li 3 VO 4 @LiVO 2 was discussed based on XRD , XPS and FTIR analysis results.
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DOI
高影响因子
Chemistry-An Asian Journal
·
2015
·Vol. 10
·期 11
·2452-2459
·
IF 4.587
Yuepeng Pang,Yongfeng Liu,Xin Zhang,Qian Li,Mingxia Gao,Hongge Pan
Herein, an initial attempt to understand the relationships between hydrogen storage properties, reaction pathways, and material compositions in LiBH 4 – x Mg(AlH 4 ) 2 composites is demonstrated. The hydrogen storage properties and the reaction pathways for hydrogen release from LiBH 4 – x Mg(AlH 4 ) 2 composites with x =1/6, 1/4, and 1/2 were systematically investigated. All of the composites exhibit a four-step dehydrogenation event upon heating, but the pathways for hydrogen desorption/absorption are varied with decreasing LiBH 4 /Mg(AlH 4 ) 2 molar ratios. Thermodynamic and kinetic investigations reveal that different x values lead to different enthalpy changes for the third and fourth dehydrogenation steps and varied apparent activation energies for the first, second, and third dehydrogenation steps. Thermodynamic and kinetic destabilization caused by the presence of Mg(AlH 4 ) 2 is likely to be responsible for the different hydrogen desorption/absorption performances of the LiBH 4 – x Mg(AlH 4 ) 2 composites.
研究领域:
材料科学
·
氢气储存
·
固态化学
·
能源材料
✓ 已验证
DOI
高影响因子
NANO
·
2024
·
IF 1
Xiaoying Lin,Xiuchun Fan,Lifang Xu,Hao Lin,Qinhua Zhong
A porous carbon material (Mg-MOF-C) was prepared by carbonization in the N 2 atmosphere using Mg-MOF-74 as the precursor. Physicochemical properties of Mg-MOF-C materials were well characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FIRT), Thermogravimetric analyzer (TG), transmission electron microscope (TEM), energy dispersive spectrometer (EDS), N 2 adsorption/desorption isotherms (BET) and EDS. The adsorption properties of the products were studied Mg-MOF-C has a high specific surface area of up to 1739.29 m 2 /g, and the pore volume of micropores was 0.98 m 3 /g. Besides, 95% of the first adsorption is retained after five cycles. The adsorption processes agreed well with the pseudo-second-order kinetic model and Langmuir isotherm model.
研究领域:
材料科学
·
环境化学
·
吸附技术
·
金属有机框架材料（MOFs）
·
碳材料
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DOI
高影响因子
Nano Research
·
2018
·Vol. 11
·期 3
·1227-1237
·
IF 7.994
Zhang Hongchao,Meng You,Song Longfei,Luo Linqu,Qin Yuanbin,Han Ning,Yang Zaixing,Liu Lei,Ho Johnny C.,Wang Fengyun
Although In 2 O 3 nanofibers (NFs) are well-known candidates as active materials for next-generation, low-cost electronics, these NF based devices still suffer from high leakage current, insufficient on–off current ratios ( I on / I off ), and large, negative threshold voltages ( V TH ), leading to poor device performance, parasitic energy consumption, and rather complicated circuit design. Here, instead of the conventional surface modification of In 2 O 3 NFs, we present a one-step electrospinning process (i.e., without hot-press) to obtain controllable Mg-doped In 2 O 3 NF networks to achieve high-performance enhancement-mode thin-film transistors (TFTs). By simply adjusting the Mg doping concentration, the device performance can be manipulated precisely. For the optimal doping concentration of 2 mol%, the devices exhibit a small V TH (3.2 V), high saturation current (1.1 × 10 –4 A), large on/off current ratio (>10 8 ), and respectable peak carrier mobility (2.04 cm 2 /(V·s)), corresponding to one of the best device performances among all 1D metal-oxide NFs based devices reported so far. When high- κ HfO x thin films are employed as the gate dielectric, their electron mobility and V TH can be further improved to 5.30 cm 2 /(V·s) and 0.9 V, respectively, which demonstrates the promising prospect of these Mg-doped In 2 O 3 NF networks for highperformance, large-scale, and low-power electronics.
研究领域:
材料科学
·
纳米电子学
·
半导体器件
·
薄膜晶体管
·
金属氧化物半导体
✓ 已验证
DOI
高影响因子
Journal of Building Engineering
·
2024
·
IF 6.7
Wenxin Wang,Shikun Chen,Xin Chen,Hao Qian,Yajun Zhang,Yi Liu,Dongming Yan
In this study, Mg–P coatings, prepared on steel alloy substrates, were exposed to temperature from 25 °C to 900 °C. The effects of high temperature exposure and the salt spray test on the anti-corrosion ability of Mg–P coating were investigated in detailed. The results show that the corrosion resistance of coatings decreases continuously from 25 °C to 700 °C, then increases at 900 °C of exposure. However, the corrosion resistance of coatings after 2000h salt spray test was significantly improved. In particular, the corrosion rate of the coating is only one-ninth that of the coating before the salt spray test when the temperature is 900 °C. Furthermore, the microscopic characterization test revealed that a dense oxide layer form between the steel alloy substrate and the coating when temperature exceed 400 °C. Besides the crystal phase transition and oxide layer , the synergistic effect of the secondary reaction of the raw material is the key factor to ensure that the coating still has good corrosion resistance at a high temperature.
研究领域:
材料科学
·
腐蚀工程
·
表面涂层
·
高温材料
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DOI
高影响因子
危险品化学品经营许可证（带存储）