ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 33
·期 5
·2210343
·
IF 19.924
Qiuchen Xu,Shitao Geng,Bin Yuan,Meng Liao,Lei Ye,Xiaoju Zhao,Yan Wang,Xiao Zhang,Shuo Wang,Zongtao Qu,Han Miao,Zhibin Yang,Yue Gao,Bingjie Wang,Yongfeng Zhou,Huisheng Peng,Hao Sun
Lithium/thionyl chloride (Li/SOCl 2 ) primary batteries are appealing power solutions because of their remarkable electrochemical performances. However, their mass applications are hindered by the challenges in sustainability, cost and safety concerns owing to the employed Li chemistry. Here, magnesium (Mg) chemistry is shown as a promising alternative through synergistic optimization of electrolyte solvation and electrode reaction kinetics. The first Mg/SOCl 2 primary battery yields surprisingly high specific capacities up to ≈14 000 mAh g −1 at a decent discharge voltage of ≈1.67 V, which outperforms the state-of-the-art Mg-based primary batteries. In addition, it retains almost 100% of the original capacity after 20-day reservation. The impressive battery performances are originated from the stabilized MgCl 2 formation on high-surface-area carbon cathode and suppressed Mg anode corrosion via the Mg-induced solvation effect. Mg/SOCl 2 primary batteries are promising candidates for low-cost and recyclable power supplies, and they thus open new avenues for the development of sustainable battery chemistries.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Shenhua Pan,Huan Yao,Yu Wen,Yue Liu,Xiaoqiang Fan,Liang Wu,Zhi-Hui Xie
ZnAl-LDH was deposited on TiO 2 nanotube to form a composite heterojunction. • The heterojunction facilitates the transfer of electrons to the Mg/Ni couple. • The composite shows low potential and high current compared to undoped TiO 2 . • The heterojunction effectively delays the galvanic corrosion of the Mg/Ni couple. To address the intrinsically poor visible-light response of conventional TiO 2 semiconductor and the severe galvanic corrosion of nickel-plated magnesium alloy (Mg/Ni), a ZnAl-layered double hydroxide (ZnAl-LDH)–modified TiO 2 composite photoanode (LDH/TiO 2 ) was rationally designed for photogenerated cathodic protection of Mg/Ni electrode. The in-situ deposition of ZnAl-LDH onto the TiO 2 nanotube arrays constructs a heterointerface that enhances visible-light harvesting and promotes the separation and directional transport of photogenerated charge carriers. Under visible-light irradiation, the LDH/TiO 2 photoanode efficiently injects photogenerated electrons into the Mg/Ni alloy, resulting in a pronounced negative shift in the photoinduced potential and thus suppressing galvanic corrosion. Electrochemical analyses reveal that the LDH/TiO 2 composite exhibits a lower photoinduced potential, higher photocurrent density, and reduced interfacial charge-transfer resistance compared with unmodified TiO 2 nanotube photoanodes, confirming the synergistic effect of LDH modification on charge-transfer kinetics and photogenerated cathodic protection efficiency. This study presents a mechanistically guided approach for constructing high-performance photoanodes for the photogenerated cathodic protection of magnesium alloys.
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Acta Biomaterialia
·
2017
·
IF 6.319
Qiuyue Yang,Wei Yuan,Xiangmei Liu,Yufeng Zheng,Zhenduo Cui,Xianjin Yang,Haobo Pan,Shuilin Wu
The biodegradability and good mechanical property of magnesium alloys make them potential biomedical materials . However, their rapid corrosion rate in the human body’s environment impairs these advantages and limits their clinical use. In this work, a compact zirconia (ZrO 2 ) nanofilm was fabricated on the surface of a magnesium-strontium (Mg-Sr) alloy by the atomic layer deposition (ALD) method, which can regulate the thickness of the film precisely and thus also control the corrosion rate. Corrosion tests reveal that the ZrO 2 film can effectively reduce the corrosion rate of Mg-Sr alloys that is closely related to the thickness of the film. The cell culture test shows that this kind of ZrO 2 film can also enhance the activity and adhesion of osteoblasts on the surfaces of Mg-Sr alloys. Statement of Significance The significance of the current work is to develop a zirconia nanofilm on biomedical MgSr alloy with controllable thickness precisely through atomic layer deposition technique. By adjusting the thickness of nanofilm, the corrosion rate of Mg-Sr alloy can be modulated, thereafter, the degradation rate of Mg-based alloys can be controlled precisely according to actual clinical requirement. In addition, this zirconia nanofilm modified Mg-Sr alloys show excellent biocompatibility than the bare samples. Hence, this work provides a new surface strategy to control the degradation rate while improving the biocompatibility of substrates.
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·
IF 5.8
Wang Chu-Ya,Zhou Heng-Deng,Wang Qi,Xu Bo-Xing,Zhu Guangcan
Phosphate removal is complicated by the need for resource recovery. Biochar shows promise for efficient phosphate adsorption, but it must be modified to enhance its adsorption capacity. In this work, magnesium (Mg)-loaded biochar was synthesized through a two-step dipping and calcination process, and the MgBC600 product was used to adsorb phosphate from simulated water and biogas slurry wastewater. The phosphate adsorption capacity of Mg-loaded biochar was 109.35 mg/g, which was 12 times higher than that of unmodified biochar. The R 2 of the Langmuir and pseudo-second-order kinetic models were 0.988 and 0.990, respectively, which fitted the phosphate adsorption process of MgBC600. Phosphate adsorption by MgBC600 was a spontaneous and endothermic process. The adsorption mechanism study showed that phosphate adsorption was controlled by the formation and electrostatic attraction of MgHPO 4 . In addition, 98% of chemically adsorbed phosphate was released after regeneration. Using phosphate-adsorbed MgBC600 as a soil amendment, Arabidopsis thaliana was 1.47 times higher than that in the biochar-only group, demonstrating that this is a promising strategy for enhancing phosphate adsorption efficiency and adsorbent recycling.
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PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 12
·1972
·
IF 5.719
Yihao Li,Hepan Zhao,Wei Xue,Fang Li,Zhimiao Wang
A series of Mg-Zr composite oxide catalysts prepared by the hydrothermal process were used for the transesterification of glycerol (GL) with dimethyl carbonate (DMC) to produce glycerol carbonate (GC). The effects of the preparation method (co-precipitation, hydrothermal process) and Mg/Zr ratio on the catalytic performance were systematically investigated, and the deactivation of the catalyst was also explored. The Mg-Zr composite oxide catalysts were characterized by XRD, TEM, TPD, N2adsorption-desorption, and XPS. The characterization results showed that compared with the co-precipitation process, the catalyst prepared by the hydrothermal process has a larger specific surface area, smaller grain size, and higher dispersion. Mg1Zr2-HT catalyst calcined at 600 °C in a nitrogen atmosphere exhibited the best catalytic performance. Under the conditions of reaction time of 90 min, reaction temperature of 90 °C, catalyst dosage of 3 wt% of GL, and GL/DMC molar ratio of 1/5, the GL conversion was 99% with 96.1% GC selectivity, and the yield of GC was 74.5% when it was reused for the fourth time.Keywords:glycerol carbonate;transesterification;hydrothermal process;Mg-Zr oxides
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Hongju Qiu,Weiwei Huang,Yanqiong Zhang,Jin Chen,Lei Gao,Mamdouh Omran,Li Nan,Guo Chen
In the family of inorganic nanomaterials , zirconia is a highly promising functional ceramic with a high refractive index , hardness, and dielectric constant, as well as excellent chemical inertness and thermal stability. These properties are enhanced in nano-zirconia ceramics, because nanopowders have a small particle size, good morphology, and uniform and dispersive distribution. In this study, a co-precipitation process was proposed to synthesise highly dispersed MgO–Y 2 O 3 co-stabilized ZrO 2 nanopowders. The effects of different calcination temperatures on the crystallisation degree and particle dispersion of zirconia nanopowders were characterised by X-ray diffraction (XRD), thermogravimetry-differential scanning calorimetry (TG-DSC), Raman spectroscopy , Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption using the Brunauer–Emmett–Teller (BET) theory, transmission electron microscopy (TEM), and field emission scanning electron microscopy (FESEM). The optimum synthesis conditions were obtained as follows: 6 h of high-energy planetary grinding and calcination at 800 °C in an electric furnace. Under these optimum conditions, the average particle size of the prepared powder was 28.7 nm. This process enriches the literature on the controllable preparation of Mg–Y/ZrO 2 nanopowders obtained by the co-precipitation method.
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高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 44
·期 41
·18012-18018
·
IF 4.197
Yongfeng Liu,Yaxiong Yang,Xin Zhang,You Li,Mingxia Gao,Hongge Pan
The thermal dehydrogenation process of the KOH-containing Mg(NH2)2–2LiH system was systematically investigated by identifying changes in the structure and composition of its components by XRD and FTIR. During ball milling, the added KOH reacts with Mg(NH2)2 and LiH to produce MgO, KH and Li2K(NH2)3. During the initial heating process (<120 °C), the newly formed KH and Li2K(NH2)3 react with Mg(NH2)2 and LiH to yield MgNH, LiNH2 and Li3K(NH2)4 along with hydrogen release. Raising the temperature to 185 °C results in a reaction between Mg(NH2)2, MgNH and LiH that gives Li2Mg2N3H3 as the product and further releases hydrogen. As the temperature is increased to 220 °C, Li2Mg2N3H3 reacts with LiNH2 and LiH to produce Li2MgN2H2 and H2. Meanwhile, two parallel reactions between Li2Mg2N3H3, Li3K(NH2)4 and LiH also generate additional hydrogen. Specifically, the KH and Li2K(NH2)3, formed in situ during ball milling, serve as reactants in the dehydrogenation reaction of the Mg(NH2)2–2LiH system, which is responsible for the significantly improved thermodynamics and kinetics of hydrogen storage.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 11
·10454-10464
·
IF 2.195
Yao Jiao,Ye Huihua,Wang Xusheng,Li Yanxia
The xMg 2+ /ySm 3+ ions co-doped CaTiO 3 :0.12Eu 3+ red phosphors were synthesized by solid-state reaction method and their structure, crystalline morphology, luminescent properties, decay curves and quantum efficiency were investigated in detail. The XRD patterns show these phosphors have an orthorhombic perovskite structure when the sintering temperature was 1350 °C. From photoluminescence spectra, two excitation peaks were observed located at 397 nm ( 7 F 0 → 5 L 6 ) and 465 nm ( 7 F 0 → 5 D 2 ), and there are two prominent red emission peaks around 595 nm ( 5 D 0 → 7 F 1 ) and 616 nm ( 5 D 0 → 7 F 2 ) corresponding to the magnetic dipole transition and electric dipole transition of Eu 3+ respectively. The luminescent properties were improved by adjusting Mg 2+ and Sm 3+ ions co-doping concentration and their optimal doping amount was found to be 7 mol% and 0.5 mol%. At this moment, their internal quantum efficiency was measured to be 52.4% and 47.5% respectively and decay times were 0.64 ms and 0.59 ms. According to concentration quench theory, the critical distance between activators in CaMTiO 3 :Eu 3+ (M = Mg, Sm) were 15.27 Å and 15.07 Å. CaTiO 3 :Eu 3+ phosphor’s thermal stability has been improved a lot due to Mg 2+ introduction. When temperature increases from 248 to 388 K, the red emission intensity of CaMg 0.07 TiO 3 :0.12Eu 3+ and CaMg 0.07 TiO 3 :0.12Eu 3+ ,0.005Sm 3+ phosphors have decayed only 12.1% and 15.9% respectively. These experimental results have indicated that the synthesized red phosphors can be used in solid state lighting devices.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Jiaguang Zheng,Xuezhang Xiao,Liuting Zhang,Yan He,Shouquan Li,Hongwei Ge,Lixin Chen
Mg(BH 4 ) 2 has been considered as one of the promising light metal complex hydrides due to its high hydrogen capacity and low cost. But its higher thermal stability (dehydrogenation at above 300 °C) needs to be improved for the practical application. In this study, the aluminum hydride AlH 3 was introduced into complex borohydride Mg(BH 4 ) 2 to synthesize a new Mg(BH 4 ) 2 AlH 3 composite by ball milling method. It is found that the active Al ∗ formed from the self-decomposition of AlH 3 can effectively improve the dehydrogenation properties of Mg(BH 4 ) 2 , the Mg(BH 4 ) 2 AlH 3 composite starts to release hydrogen at 130.8 °C with a total hydrogen capacity of 11.9 wt.%. The dehydrogenated products of the composite is composed of Mg 2 Al 3 and B at 350 °C, resulting in the improved hydrogen desorption properties of Mg(BH 4 ) 2 AlH 3 composite. The Mg 2 Al 3 and B products would be further transformed into MgAlB 4 and Al at 500 °C. Moreover, the Mg 2 Al 3 and B dehydrogenated products show better reversible hydrogen storage property than that of the MgAlB 4 and Al products. This research shows a way to alter hydrogen de/hydrogenation route and reversibility of Mg(BH 4 ) 2 complex hydride by compositing with AlH 3 and controlling the dehydrogenation temperature.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Siyuan Wang,Jie Li,Yang Xiao,Xinyi Zhu,Jingyu Yuan,Yan Yang,Jinliang Zou,Yichao Yan
This study presents a systematic investigation of the crystalline phases, grain characteristics, dynamic hysteresis loops, and magnetodielectric attributes of Mg 0.9 Zn 0.1 Fe 2- x Co x O 4 ferrites ( x = 0.00–0.10, with a increments of 0.02). The samples were fabricated by a solid-state synthesis route, and formed by sintering at 950 °C for 3 h. XRD analysis shows that all samples possess the standard ferrite phase. Due to the influence of sintering additive Bi 2 O 3 , the trace amounts of Bi 24 Fe 2 O 39 phase are present in the samples, which exert a positive influence on the material’s dielectric performance. Analysis of the grain characteristics indicates that the mean crystallite dimension of the samples gradually increases as Co 2 + ion substitution level rises, and the particle size distribution becomes more uniform. Upon applied magnetic field stimulation, all samples present outstanding soft magnetic properties. When the Co 2+ content is 0.06, the saturation magnetization of the material attains a peak value of 48.8 emu/g. Dynamic magnetic measurements reveal that the permeability decreases significantly (from 20 to 7.5) with the incorporation of Co 2+ ions, while the cutoff frequency correspondingly increases from 0.2 GHz to 1 GHz. At x = 0.08, the sample exhibits excellent magneto-dielectric matching characteristics across the 10–300 MHz frequency band. The normalized impedance value is approximately 1, and the permeability and permittivity are nearly equal in magnitude ( μ' = 10, ε' = 10.1 at 100 MHz). Additionally, the magnetic and dielectric losses are remarkably low at 100 MHz, with tanδ μ = 0.054 and tanδ ε = 0.0048. Consequently, the magneto-dielectric material prepared in this work is a potential option for miniaturized VHF antenna substrate material.
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Di Wu,Weiqin Wang,Yanna NuLi,Jun Yang,Jiulin Wang
To enhance the electrochemical performance of Se cathode for high-energy-density magnesium-selenium (Mg–Se) batteries with easily prepared nucleophilic (PhMgCl) 2 -AlCl 3 +LiCl/THF (APC-based) hybrid electrolyte, Cu doped Se@MC composites (Cu–Se@MC) with different Cu content (0.05, 0.10, 0.15, 0.20, 0.25 and 0.30) are prepared by impregnation reduction and melting selenization method. The composites are composed of a mixture of chain-structured Se and CuSe embedding in the microporous carbon, and the addition of Cu significantly improves reversibility and cycle life of the composites in the nucleophilic APC-based hybrid electrolyte. At the 0.25 Cu content, the cell exhibits 346.7mAhg −1 first discharge capacity and the specific capacity maintains at 112mAhg −1 after 200 cycles at a current density of 50 mA g −1 , which is superior to that with non-nucleophilic Mg(HMDS) 2 -(AlCl 3 ) 2 –MgCl 2 +LiTFSI/DME (HMDS-based) and MBA-(MgCl 2 ) 2 –(AlCl 3 ) 2 +LiCl/THF (MBA-based) hybrid electrolytes.
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高影响因子
Energy & Environmental Materials
·
2022
·Vol. 6
·期 6
·e12486
·
IF 13.443
Dong Chen,Xin Ren,Ting Li,Zhongxue Chen,Yuliang Cao,Fei Xu
Rechargeable Mg batteries (RMBs) are a promising large-scale energy-storage technology with low cost and high safety, but the performance is limited by the inferior kinetics of Mg-intercalation cathodes. In the present study, an octylamine-supporting interlayer expanded molybdenum diselenide (e-MoSe 2 ) is synthesized and used as cathode for RMBs, in comparison with ordinary crystalline MoSe 2 . The octylamine molecules introduced show a strong interaction with the MoSe 2 layers and increase the layer spacing significantly from 6.46 to 11.5 Å. e-MoSe 2 shows a high Mg-storage capacity of 238 mAh g −1 at 50 mA g −1 and a superior rate performance of 39 mAh g −1 at 10 A g −1 , far advantageous over crystalline MoSe 2 . e-MoSe 2 also shows a considerably high structure stability during repeated magnesiation/demagnesiation, providing an outstanding cycling stability for 1000 cycles. Further electrochemical tests demonstrate the high Mg 2+ diffusion coefficients in e-MoSe 2 . Theoretical computation indicates the interlayer expansion changes the Mg 2+ diffusion paths from “hollow site → hollow site” to “hollow site → Se atom site → hollow site”, largely decreasing the energy barrier and improving the Mg 2+ diffusion kinetics. The present work highlights an efficient strategy for the improvement of Mg-storage performance for RMB cathodes.
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高影响因子
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