INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Yongli Sun,Xiang Gao,Na Yang,Xiaowei Tantai,Xiaoming Xiao,Bin Jiang,Luhong Zhang
With the aim of simultaneously achieving synthesis and morphology control of three-dimensional (3D) hierarchical layered double hydroxide (LDH) by more efficient and environmentally friendly methods, a facile and cost-efficient double-drop coprecipitation method was creatively applied to fabricate 3D flowerlike microstructures (Al2O3-MgAl-LDHs) using γ-Al2O3 as a sacrificial template. The morphology evolution process and growth characteristics of Al2O3-MgAl-LDHs were investigated in detail, revealing that γ-Al2O3 not only provides an effective support for the crystal growth of LDH but also is involved in the LDH layer formation process through self-decomposition. More importantly, LDH morphologies can be regulated by varying the reaction conditions, such as the γ-Al2O3 concentration, Mg2+/Al3+ molar ratio, and pH. Additionally, a possible formation mechanism for 3D hierarchical flowerlike Al2O3-MgAl-LDHs was illustrated. Remarkably, owing to the high specific surface area and low/medium/high-strength basic sites, the as-obtained LDH after calcination exhibited excellent catalytic activity and reusability in the transesterification of glycerol with dimethyl carbonate.
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JOURNAL OF SOLID STATE CHEMISTRY
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2019
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IF 2.291
Zhenying Liu,Shuai Ma,Xiao Li,Hu Yang,Zhenliang Xu
New porous carbonaceous materials are anticipated in the energy storage and environmental application. In the present study, a new carbonaceous composite with hierarchically porous structure was prepared from Mg(OH) 2 pre-filled PAN based membrane for the first time. The obtained carbonaceous composite contains 54.1% C, 26.8% O, 6.2% N and 5.6% Mg. Afterwards, the composite was tested as a supercapacitor and dye adsorbent. Its special capacitance reached 278 F/g at the scan rate of 0.5 A/g, and 186 F/g at the scan rate of 50 A/g, which outperforms most of supercapacitors obtained from the same precursor. A good cycling stability (98% in 5000 cycles) and a high power density (about 7000 W/kg) are achieved. As a dye adsorbent, the composite shows a high MO adsorption capacity of 1170 mg/g, much higher that of the active carbons. These results indicate an effective method to prepare new carbonaceous materials or to treat those disfunctional membranes.
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高影响因子
Inorganic Chemistry Frontiers
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2018
·Vol. 5
·期 10
·2657-2665
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IF 5.106
Hongwei Pang,Yihan Wu,Shuyi Huang,Congcong Ding,Shun Li,Xiangxue Wang,Shujun Yu,Zhongshan Chen,Gang Song,Xiangke Wang
In the past few decades, uranium (235, 238U(VI)) has turned into a forefront environmental issue due to its extensive use in the nuclear industry and its toxicity and radioactivity. Herein, nanoscale zero valent iron (nZVI), which was supported on Ca–Mg–Al-layered double hydroxide (Ca–Mg–Al-LDH/nZVI), was fabricated via an in situ growth route and employed for U(VI) decontamination from aqueous solutions. Spectroscopy and microscopy (SEM, TEM, FTIR, XRD, BET, and XPS) technologies were applied for the investigation of the properties of Ca–Mg–Al-LDH/nZVI and the U(VI) elimination mechanism. Ca–Mg–Al-LDH/nZVI had a remarkable BET surface (426.8 m2 g−1), abundant functional groups (i.e., Fe–O, Al–O, –OH, etc.), high efficiency (4 h to achieve equilibrium) and large adsorption capacities (Qmax = 216.1 mg g−1) for U(VI) removal. The decontamination process of U(VI) was observed to be pH-dependent and ionic strength-independent, suggesting that the adsorption was predominated by inner-sphere surface coordination. XPS spectroscopy analyses indicated that the reduction and adsorption of nZVI and the adsorption of Ca–Mg–Al-LDH dominated U(VI) elimination on Ca–Mg–Al-LDH/nZVI. The environmentally friendly synthesis method, excellent physicochemical properties and remarkable removal performance suggested that Ca–Mg–Al-LDH/nZVI was applicable as a potential adsorbent for U(VI) decontamination from wastewater in environmental pollution remediation.
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CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Xiubo Xie,Ming Chen,Peng Liu,Jiaxiang Shang,Tong Liu
The Mg-5.0 wt%Ni-2.3 wt%V nanocomposite has been produced through reducing NiCl 2 with the Mg-V nanoparticles (NPs) prepared by hydrogen plasma metal reaction (HPMR) approach. The in situ formed Ni and V particles of about 15 nm uniformly decorate on the surface of Mg NPs. The Ni NPs transform into Mg 2 Ni while the V NPs remain unchanged after first hydrogen absorption and desorption cycle at 673 K. They show synergistic catalytic effects on the hydrogen storage properties of Mg-Ni-V nanocomposite. The nanocomposite can absorb 4.6 wt% H 2 within 30 min at 473 K and desorb 5.2 wt% H 2 within 10 min at 623 K. The activation energies of hydrogenation/dehydrogenation processes are decreased to 52.8 and 85.1 kJ per mol H 2 , lower than those of the Mg-5.4 wt%Ni nanocomposite of 63.2 and 89.3 kJ per mol H 2 . The enhanced hydrogen storage performances of the Mg-Ni-V nanocomposite are mainly attributed to the synergistic catalytic effects of the Mg 2 Ni and V catalysts, and the nanosize effect of Mg NPs on the decrease of the hydrogen diffusion distance.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Kangbao Li,Yuanyuan Zhang,Dong Zhang
In the field of construction, structural supercapacitors (SSCs) have been widely noticed due to their simultaneous functions of load-bearing and energy storage. Unfortunately, the currently available electrodes for SSCs are still aimed at application scenarios such as electronics and electric vehicles, and while their performance is good, they are not applicable to the construction sector, which is massive in scale and extremely cost-sensitive industry. Herein, after trade-off between cost and electrochemical performance, a novel low-cost 3D nanomaterial was designed through a facile approach aimed at increasing the areal energy density of SSCs. By growing Mg-Co double hydroxide nanomaterials directly on nickel foam, we achieved a large areal capacitance of 2577 mF/cm 2 at 5 mA/cm 2 (1136.7 F/g at 2.2 A/g). It also exhibits good cycling stability with a capacitance retention of 82.4 % after 10,000 cycles. In addition, SSCs using magnesium-cobalt double hydroxides achieves a high energy density of 285.6 μWh/cm 3 at a power density of 6.31 mW/cm 3 , which is superior to previously reported structural devices. This demonstrates that Mg-Co double hydroxide electrode has good suitability with SSCs and effectively improves the areal energy density of SSCs. Our proposed method also provides a faster and more reliable pathway for low-cost electrode preparation in SSCs, which may lead to the development of a new generation of SSCs.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2017
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IF 3.133
Liuting Shi,Jia Hu,XuDong Lin,Liang Fang,Fang Wu,Jiao Xie,FanMing Meng
Composite coatings consisting of polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE) and 40 nm silicon dioxide (SiO 2 ) nanoparticles (PPS-PTFE/SiO 2 ) with SiO 2 in the range of 0–4 g/l were successfully prepared on AZ31 Mg alloys by a simple spray process. The morphology, composition, water contact angle (WCA), wear behavior and corrosion properties of the composite coatings were measured by using SEM, FT-IR, OCA20, sandpaper abrasion and electrochemical workstation, respectively. Effects of SiO 2 content on the wear behavior and corrosion properties of the coatings were studied. It is found that micro-sized protrusions distribute on the surface of the coatings, and a fibrous-network structure of PTFE arranges on the protrusions. WCAs of the PPS-PTFE/SiO 2 (0–4 g/l) coating are in the range of (152°–145.5°) ± 0.3° and the sliding angles (SAs) are less than 5°. The WCAs of the un-abraded and 10 m-abraded-on-sandpaper PPS-PTFE/SiO 2 (4 g/l) coating are 145.5°±0.3° and 142.5°±0.3°, respectively, implying the PPS-PTFE/SiO 2 coating is a robust superhydrophobic one with good wear resistance. Due to the superhydrophobic characteristics, the PPS-PTFE-based coatings show superior corrosion resistance in 3.5 wt% NaCl solution to pristine AZ31 Mg alloys. Owing to the excellent superhydrophobicity, wear resistance and corrosion resistance properties, the robust PPS-PTFE/SiO 2 coating is regarded to possess great potential to be applied in automobiles and navigation industries in future.
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MATERIALS CHARACTERIZATION
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2015
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IF 1.845
Muhammad Rashad,Fusheng Pan,Wei Guo,Han Lin,Muhammad Asif,Muhammad Irfan
Powder metallurgy method was used to synthesize Mg–3Al–1Zn-(1.5Al 2 O 3 –xSiC) composites, to investigate the influence of Al 2 O 3 and SiC hybrid particles on mechanical properties of magnesium alloy. The mechanical characterization of as-extruded composites demonstrated enhanced 0.2% yield strength, and ultimate strength, and reduced fracture strain (Strain at fracture) values both in tension and compression loading. The micro hardness (Vickers hardness, Hv) of composites was increased with increasing reinforcement particle contents. The mechanical characterization of heat treated samples indicated the enhanced fracture strains and reduced microhardness, 0.2% tensile yield strength, ultimate tensile strength. The enhanced fracture strains of heat treated sample are attributed to the dissolved Mg 17 Al 12 intermetallic phases in the matrix. An attempt is made to narrate the effect of heat treatment, presence of Al 2 O 3 and SiC hybrid particles, and their increasing amount on microstructural and mechanical properties of magnesium alloy.
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CORROSION SCIENCE
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2013
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IF 3.615
Yingqi Chen,Guojiang Wan,Juan Wang,Sheng Zhao,Yuancong Zhao,Nan Huang
Magnesium-based materials are promising in biodegradable implants, but the proper corrosion control is a challenge. Phytic acid has potential as a coating on Mg to control the degradation rate. An alkaline pre-treatment process is implemented to form the hydroxyl group on the Mg surface and covalently immobilize phytic acid. The surface-immobilized phytic acid molecules chelate with Mg to form a dense and homogenous protective coating. The coated Mg exhibits a smaller corrosion current density and degradation rate as compared to bare Mg in the phosphate buffered saline.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2017
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IF 2.843
Peng Chen,Siyang Tang,Hairong Yue,Changjun Liu,Chun Li,Bin Liang
A new method coupling CO2 mineralization and solvent extraction was proposed and investigated to precipitate magnesium from high Mg/Li ratio brine. Organic amine was employed to extract HCl formed during the CO2 mineralization process and to realize continuous conversion of MgCl2 to precipitated MgCO3, thereby removing the magnesium contained in the brine. The effects of brine concentration, extractant, diluents, extractant concentration, phase ratio, and reaction temperature were systematically investigated. A blend of trioctylamine and isoamyl alcohol was used as the extractant and diluent, and the reaction parameters were optimized. The mechanism was proposed, and a stripping process was designed. Under the optimal conditions, the conversion of magnesium was as high as 67.41%, and the Mg/Li ratio of the raffinate decreased from 20 to 5.4.
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NANOTECHNOLOGY
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2024
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IF 2.9
Mewin Vincent,Venkata Sai Avvaru,Maciej Haranczyk,Vinodkumar Etacheri
Although Mg-Li dual metal-ion batteries are proposed as a superior system that unite safety of Mg-batteries and performance of Li-ion based systems, its practical implantation is limited due to the lack of reliable high performance cathodes. Herein, we report a high-performance Mg-Li dual metal-ion battery system based on highly pseudocapacitive hierarchical TiO2-B nanosheet assembled spheres (NS) cathode. This 2D cathode displayed exceptional pseudocapacitance (a maximum of 93%) specific capacity (303 mAh/g at 25 mA/g), rate performance (210 mAh/g at 1A/g), consistent cycling (retain ~100% capacity for 3000 cycles at 1A/g), coulombic efficiency (nearly 100%) and fast-charging (~12.1 min). These properties are remarkably dominant to the existing Mg-Li dual metal-ion battery cathodes. Spectroscopic and microscopic mechanistic studies confirmed negligible structural changes during charge-discharge cycles of the TiO2-B nanosheet assembled spheres electrodes. Exceptional electrochemical properties of the 2D electrode is ascribed to remarkable pseudocapacitive Mg-Li dual metal-ion diffusion via the numerous nanointerfaces of TiO2-B caused by its hierarchical microstrucrure. Large surface area, nanosheet morphology, mesoporous structure and ultrathin nature also acted as secondary factors facilitating improved electrode-electrolyte contact. Demonstrated approach of pseudocapacitive type Mg-Li dual metal-ion intercalation through hierarchical nanointerfaces may be further utilized for the designing of numerous top-notch electrode materials for futuristic Mg-Li dual metal-ion batteries
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PubMed
高影响因子
JOURNAL OF LIGHTWAVE TECHNOLOGY
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2025
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IF 4.8
Shenghu Wei,Jiaxuan Ma,Shiyuan Wang,Yunfan Tang,Liyun Ding,Li Yang,Tuanjie Che
A novel optical fiber surface plasmon resonance (SPR) biosensor based on a hetero-core structure (multimode/non-core/multimode) and polydopamine modification is developed for the detection of beta-2-microglobulin (β2-MG) in urine. When β2-MG at different concentrations is captured by the antibody on the optical fiber probe, it leads to different changes in the local refractive index. Based on this SPR effect, the optimal conditions for various sensitive materials were explored and experimental characterization was done accordingly, and finally the proposed optical fiber biosensor was prepared. The β2-MG sensor showed a linear sensitivity of 0.96 nm/lg c and a LOD of 4.22 ng/mL in the range of 0.01-1000 ng/mL. With no need for labeling, this biosensor has rapid response and low cost. In addition, it exhibited excellent specificity and stability. The proposed sensor provides excellent performance with simple fabrication and offers a bioanalytical platform with potential applications for clinical diagnosis of renal function diseases.
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JOURNAL OF CATALYSIS
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2024
·
IF 6.5
Yun Tian,Mengqiao Gao,Zhiyang Tang,Fukun Li,Qiang Zeng,Jinxing Long,Xuehui Li
Conversion of lignin to valuable chemicals without external hydrogen presents a significative but challengeable endeavor. Herein, an efficient approach has been proposed for the lignin hydrogenolysis with in-situ hydrogen in the presence of Ni nanoparticles nested in layered double oxides (LDOs). 84.4 % conversion of lignin was achieved over 30Ni-Mg 3 Al-LDOs, affording a 21.3 % yield of monomers, and 38.0 % of which was identified as 4-ethylphenol. Catalyst characterizations revealed that this excellent performance of lignin conversion should be ascribed to the highly dispersed Ni nanoparticles, strong interfacial interactions between Ni and LDOs, and suitable basicity of catalysts. Furthermore, the roles of the solvent (1,4-dioxane aqueous solution) and the lignin methoxyl groups as hydrogen resources were distinguished, and the former acted as an initial hydrogen to promote lignin depolymerization, and the latter was responsible for the high yield of 4-ethylphenol. In addition, a plausible reaction pathway for lignin hydrogenolysis has been proposed.
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