RSC Advances
·
2024
·Vol. 14
·期 33
·24055-24065
·
IF 3.9
Xiuzhen Wei,Zelong Chen,Mengjia He,Liangliang Xu,Yue Li,Jia Yang,Xuekang Zhang,Xianghao Zhang,Ze Wang,Shiyu Cao,Qinghua Zhou,Bingjun Pan
Mg–Fe layered hydroxide (LDH) was synthesized by the double titration method and added to trimesoyl chloride (TMC) to prepare an Mg–Fe LDH-modified polyamide nanofiltration (NF) membrane by interfacial polymerization (IP). Compared to the pure polyamide NF membrane, the Mg–Fe LDH-modified membrane presented a wrinkled structure and a comparatively smooth surface. Additionally, the permeation flux and rejection rate of the modified NF membrane for 1000 mg L−1 Na2SO4 solution were 61.7 L m−2 h−1 and 95.9%, respectively. When the Mg–Fe LDH modified NF membrane was used to separate dye/NaCl mixed solutions, the rejection of NaCl was less than 17% and the rejection rate of Coomassie Brilliant Blue (CBB) molecules was close to 100%. At the same time, the concentration of CBB increased from 500 mg L−1 to 1151 mg L−1 which means that the LDH modified NF membrane could separate CBB/NaCl effectively and could concentrate CBB at the same time.
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Journal of Energy Storage
·
2024
·
IF 8.9
Congwen Duan,Haimei Wang,Jinhui Wu,Ting Qu,Yuling Zhang,Dong Fu,Lianxi Hu,Fei Wang,Dongsheng Lai,Yueru Dai,Ying Wu
Mg/MgH 2 stands out as an excellent hydrogen storage material due to its abundant presence and its capacity for high hydrogen storage density. However, the sluggish hydrogenation/dehydrogenation kinetics make it unsuitable for solid-state hydrogen storage. To tackle these challenges, the MgH 2 -Co@Pd‑c arbon nanotubes composite was created through ball milling , and its hydrogenation/dehydrogenation behavior was examined. The inclusion of Co@Pd notably enhanced the kinetics of hydrogenation/dehydrogenation in Mg/MgH 2 . The Mg-Co@Pd‑c arbon nanotubes composite achieved an absorption of 7.30 wt% H 2 in just 8 h of milling. The study proposed an energy conversion model to investigate the enhanced properties of Mg/MgH 2 . The addition of Co@Pd substantially reduced the activation energy (Ea) for hydrogen desorption to 81.9 kJ/mol. Furthermore, Transmission Electron Microscope and Density Functional Theory simulations were employed to understand how Co@Pd enhances the properties of Mg/MgH 2 . The improved hydriding/dehydriding kinetics of Mg/MgH 2 are likely closely linked to both the confining impact of c arbon nanotubes and the synergistic interplay of the “spillover” and “hydrogen pump” effects facilitated by the Co@Pd bimetallic catalysts . The excellent hydriding/dehydriding behavior is ascribed to the electron spillover and the phase transformation of Mg 2 Co/Mg 2 CoH 5 and Mg 6 Pd/Pd. These findings offer new insights into the new insights into the rational design of Co@Pd bimetallic catalysts, which are expected to be an optimal solution for supported catalysts in Mg-based solid-state hydrogen storage systems.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Zhijiang Rong,Wei Guo,Haotian Liang,Huan Lv,Hua Guo,Yi Zhang,Bo Zhang,Chunyan Hao,Xianjun Liu,Hongyan Sun,Yifan Gao
Biological metal ions play crucial roles in various life processes and exhibit diverse biological functions. Specifically, Ca(II), Mg(II), Cu(II), and Mn (II) ions are intricately involved in insulin function. To further clarify the biological functions of biological metal ions on insulin, the interaction mechanism of insulin affected by Ca(II), Mg(II), Cu(II), and Mn (II) ions were comparably investigated via spectroscopic, circular dichroism(CD), and electrochemical approaches. Electrochemical studies demonstrate that Mn(II) forms an M 2 L-type complex with insulin, exhibiting a binding constant of β Mn = 9.3 × 10 9 , while Cu(II) and insulin form an M 4 L-type complex with a significantly higher binding constant of β Cu =9.18 × 10 12 . Electrochemical investigation of the interaction between Ca(II) and Mg(II) with insulin adsorbed onto a glass carbon electrode surface revealed that the presence of Ca(II) and Mg(II) induced conformational changes in insulin, resulting in reduced adsorption capacity. Additionally, it was observed that the presence of Ca(II) and Mg(II) enhanced the redox signal of probe ions. The binding constants values were calculated to be 1.108 × 10 3 L•mol –1 for the insulin-Ca(II) system and 2.28 ×10 2 L• mol –1 for the insulin-Mg(II) system. Spectroscopic studies showed that the binding of Cu(II) ions to insulin molecules may be controlled by chelation mechanism, and the interaction between Cu(II) ions and insulin molecules may occur in the aromatic region. Mn(II) ion binding is mainly controlled by ionic interactions, and its binding site is far away from the aromatic region.The combination of Ca(II) and Mg(II) with insulin induced a small enhancement in the Ultraviolet-visible (UV) absorption peak, with Ca(II) exhibiting a more pronounced effect compared to Mg(II). The results of spectral, CD and electrochemical studies are consistent.
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KEY ENGINEERING MATERIALS
·
2017
·
IF 0
Meng Xia Qian,Jian Li Ma,Min Hong Xu
A novel supported catalyst is prepared through immobilization of water soluble phthalocyanine, which is synthesized by modifying tetraminophthalocyanine with cyanuric chloride, onto the supporting material Mg-Al hydrotalcite via co-precipitation method. The structure of the catalyst is characterized by infrared spectroscopy instrument (FT-IR) and X-ray diffractometer. Catalytic activity is examined through comparative experiments. The results show that it exhibits high catalytic activity for degradation of methylene blue (MB) in the presence of H2O2, the remaining rate of MB is 12.02% after 6 h. The reaction process conforms to the equation of pseudo-first-order kinetics, and the correlation coefficient R2> 0.99. The recycling tests for five times are also carried out and prove its reusability in catalytic application.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·
IF 3.5
Mengting Jiang,Xiaopeng Li,Tengfei Deng
In this study, aluminum titanate/anorthite (Al 2 TiO 5 -CaAl 2 Si 2 O 8 ) ceramics were fabricated from ferrotitanium slag through phase reconstruction. Stabilization of the ceramic was achieved by migration of Mg element into Al 2 TiO 5 phase. The results indicated that optimal performance was achieved with the addition of 4 wt% MgO and 60 wt% ferrotitanium slag at 1370°C. The ceramic exhibited bulk density of 3.11 ± 0.01 g/cm 3 , thermal storage density of 1.51 kJ/cm 3 , and thermal expansion coefficient of 3.40 × 10 −6 /°C (1000°C), respectively. Additionally, the solid solution of Mg 2+ in the Al 2 TiO 5 lattice reduced the formation of microcracks and enhanced the mass transfer process. Consequently, the sintering temperature decreased from 1415°C to 1370°C while the bending strength increased from 61.25 ± 1.05 MPa to 75.92 ± 7.72 MPa. Furthermore, finite element simulation demonstrated that higher thermal expansion led to concentrated thermal stress, potentially increasing the possibility of ceramic cracking. This research provides a new strategy for preparing low thermal expansion ceramics from titanium-containing solid waste.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Yu-Zhen Xu,Yu-Le Wang,Yu-Dong Shan,Song-Hai Wu,Yong Liu,Xu Han
Selective oxidation of cyclohexene (Cy) to cyclohexene oxide (Cy-ep) by O2 under solvent- and initiator-free conditions is a challenge in chemical processes, which is still constrained by its low selectivity (theoretical selectivity of 50.0%). Given the low epoxide selectivity (<20.0%) of single metal catalysts, we propose a relay catalysis strategy on the oxidation of Cy to Cy-ep with high selectivity by the spherical Mg–Mo bimetallic oxide (MMO). Such a relay catalyst exhibits a desirable Cy conversion of 31.0% and a high selectivity of 49.3% toward Cy-ep. Meanwhile, the high stability and reusability of MMO also indicate its potential to be used for industrial scale-ups. A series of characterizations and DFT calculations reveal that the negatively charged lattice oxygen in [MgII–O–II] adsorbs allylic H of Cy to weaken the bond energy of the allylic C–H bond and form Cy•, and then Cy• rapidly traps O2 to give CyOO•, which subsequently abstracts H from allylic C–H of another Cy to form 2-cyclohexene-1-hydroperoxide (Cy-OOH) and Cy•, achieving the propagation cycle. On the other hand, the Mo(VI) site in MMO catalyzes the produced Cy-OOH peroxo, which then oxidizes Cy to Cy-ep and 2-cyclohexene-1-ol. This work provides insight into the relay catalyst for the epoxidation of olefin with O2 with high selectivity under solvent- and initiator-free conditions.
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OPTICAL MATERIALS
·
2025
·
IF 4.2
Jianjun Zeng,Kuibao Zhang,Xi Zhang,Shengquan Yu
The co-precipitation method allows rapid and large-scale preparation of highly active Mg–Al spinel precursors, but the crystalline growth of precursors affects the activity of the calcined powders. In the study, the stirring is introduced to inhibit the crystal growth during aging. The effects of stirring during aging on the grain growth of precursors, the phase composition and morphology of calcined powders and the optical transmittance of ceramics were comparatively investigated. It is found that the rod-like morphology obtained by static aging would be retained after calcination, resulting in the formation of a small number of pores in the HIPed ceramics. The stirring effect inhibits the growth of the precursor and molds it into granular-like particles, resulting in spherical-like particles of approximately 50 nm after calcination. The transmittance of stirred aging in the near-infrared wavelength band is also above 80 % (1000–1500 nm) and the maximum transmittance of 84 % can be achieved at 1300 nm wavelength.
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PLoS One
·
2025
·Vol. 20
·期 8
·e0331575
·
IF 2.6
Yu Jin,Haifeng Wu,Shuai Huo,Siyu Chen,Lili Shen,Hongjie Di,Lianfeng Du,Peng Li
Livestock and poultry farming effluents (LPFE) have become a significant source of pollution in the agricultural water environment, with nitrogen (N) and phosphorus (P) being the major pollutants. The use of inexpensive Mg2 + -modified materials as crystallization carriers can enhance the struvite crystallization and precipitation reaction, enabling efficient recovery of N and P nutrients from LPFE. In this study, Mg2 + -modified corncob biochar (CCBC-Mg) and Mg2 + -modified natural zeolite (NZ-Mg) were assessed for their simultaneous recovery of N and P from LPFE. BET, SEM-EDS, FTIR, XRD and adsorption isotherm and adsorption kinetics modelling were used to study the N and P adsorption properties and mechanisms. The results showed that Mg2 + modification significantly enhanced the simultaneous ammonia nitrogen (AN) and total phosphorus (TP) recovery of the two materials. After modification, corncob biochar (CCBC-Mg) showed the best P recovery performance, while natural zeolite (NZ-Mg) showed the best AN recovery, with adsorption quantities reaching 116.99 mg/g and 47.50 mg/g, respectively. The findings demonstrated that the adsorption processes for both AN and phosphate across all materials adhered to the pseudo-second-order kinetic model and Langmuir isotherm, collectively indicating that monolayer adsorption governed by chemical interactions was the predominant mechanism. CCBC and NZ mainly adsorbed AN and TP by electrostatic attraction and ion exchange, whereas CCBC-Mg and NZ-Mg, mainly relied on struvite precipitation on the material surface. The Mg2 + - modification increased the solution pH and formed Mg-P precipitates on the material surface, providing a favourable alkaline environment and nucleation conditions for the struvite reaction, thereby promoting the simultaneous recovery of AN and TP by the materials. This study could provide a theoretical basis for the design of struvite carrier for the simultaneous recovery of AN and TP from LPFE by the struvite precipitation method, and promote the application of this process in livestock and poultry farming effluent treatments.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Xuxi Teng,Yingying Sun,Jili Yue,Rong Li,Guangsheng Huang,Jingfeng Wang,Chaohe Xu
Rechargeable magnesium batteries (RMBs) have garnered significant attention in recent years. However, the commercialization of RMBs has been severely hampered by the low-strength and high-resistance connections between the magnesium (Mg) anodes and aluminum (Al) tabs. To address this challenge, we perform orthogonal experiments on 0.2 mm-thick Al–Mg ultrasonic welded joints to establish an optimized parameter range. Analysis of variance revealed that ultrasonic amplitude exerted the most dominant influence on joint strength (52.03%), followed by welding time (25.59%) and welding pressure (22.37%), with a significant interaction effect observed between welding time and amplitude. Notably, at a welding pressure of 0.40 MPa, the Al–Mg joint achieved peak performance, including the maximum lap-shear load (59.20 N) and minimal electrical resistance (0.483 mΩ). RMB pouch cells assembled with good-welded tabs demonstrated superior electrochemical performance compared to under and overwelded counterparts, exhibiting reduced internal resistance (3.55 Ω in the first cycle), enhanced capacity retention (77.45% after 60 cycles), and raised Coulombic efficiency (99.88% after 440 cycles).
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APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Muhua Chen,Yuqing Wang,Mengting Li,Bo Fu,Jihuai Tan,Licheng Li,Meisi Chen
The construction of efficient interfacial active sites in metal oxides remains a major challenge for driving the CO 2 cycloaddition under mild conditions. Herein, we engineered a Co x Mg 1-x O solid solution catalyst via a controlled reduction strategy, which achieves near-atomic dispersion within the MgO lattice. The catalyst delivers 96 % yield of cyclic carbonate from epichlorohydrin at 90 °C and 0.1 MPa CO 2 , surpassing the performance of benchmark MgO and Co 3 O 4 catalysts and maintaining stability over five cycles. Structural and spectroscopic characterization (XRD, XPS, UV-Vis) combined with DFT calculations reveal that the high activity originates from synergistic Co-O V -Mg interfacial sites, where Lewis acidic Co 2 + activates epoxides and adjacent oxygen vacancies facilitate CO 2 adsorption. This synergistic effect lowers the energy barrier for the rate-determining ring-opening step to 0.37 eV. This work demonstrates the rational design of oxide solid solutions to create cooperative interfacial sites for efficient CO 2 conversion under mild conditions.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Jiaxin Huang,Huanbin Gou,Jinming Pan,Yuping Liu,Ming Nie,Bo Shang,Danmei Yu,Guangsheng Huang,Dingfei Zhang,Fusheng Pan
Within the domain of metal-air battery systems, developing the non - precious metal catalysts featuring extraordinary catalytic activity in oxygen reduction reaction (ORR) is crucial to the air-cathode. This work unveils a sol-gel engineered synthesis of La 0.9 Ce 0.1 Co 0.1 Mn 0.9 O 3 perovskite via the co-doping strategy, with targeted exploration of its electrochemical behavior and underlying mechanism in Zn-air and Mg-air battery systems. The perovskite La 0.9 Ce 0.1 Co 0.1 Mn 0.9 O 3 has a wealth of catalytically active ORR sites and a mesoporous architecture. The diffusion-limited current density of La 0.9 Ce 0.1 Co 0.1 Mn 0.9 O 3 successfully achieves a 1.2-fold enhancement relative to commercial Pt/C with a low H 2 O 2 yield of <0.27 %, underscoring its superior mass transport kinetics. The maximum power densities of La 0.9 Ce 0.1 Co 0.1 Mn 0.9 O 3 -based primary/secondary zinc - air batteries are 130 and 83 mW cm −2 , respectively, which are on a par with those of Pt/C - based Zinc - air batteries. Whereas, the open - circuit voltage and maximum power density of the primary magnesium - air battery fabricated with 10 wt% KCl as the electrolyte are 1.85 V and 52 mW cm −2 , respectively, which exhibit superiority over Pt/C catalysts. In combination with DFT analyses, the La 0.9 Ce 0.1 Co 0.1 Mn 0.9 O 3 perovskite emerges as a prospective ORR catalyst for metal-air battery realization.
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Materials Today Communications
·
2025
·
IF 4.5
Qiaoyin Li,Aijie Ma,Yuxiang Zhang,Wei Gao,Hongwei Zhou
Superhydrophobic materials have attracted significant attention for their exceptional surface wettability. However, their short service life limits their application in practical anti-corrosion engineering. Magnesium alloys exhibit numerous unique properties but suffer from poor corrosion resistance. To enable the widespread use of magnesium alloys, it is crucial to develop effective anti-corrosion strategies. In this study, a mechanically stable superhydrophobic material was developed using siloxane-modified SiO₂ combined with an adhesive. Test results showed that the contact angle of this superhydrophobic material reached 160° and demonstrated excellent mechanical stability and antifouling properties. Even after 60 cycles of tape adhesion-peeling tests, the contact angle was remained above 150°. In addition, we used an epoxy resin (EP) coating as a primer and sprayed this superhydrophobic material on its surface to prepare a dual-layer coating for the anti-corrosion of magnesium alloys. The coating retained outstanding anti-corrosion performance after immersion in a 3.5 % NaCl solution for 30 days, with impedance values two orders of magnitude higher than those of the pure EP coating. The combination of superhydrophobic material and EP coating provides durable and effective protection for magnesium alloys. We believe that this method presents a promising approach for designing novel anti-corrosion coatings.
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