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Effect of Ca/Mg molar ratio on the calcium-based sorbents Ca/Mg摩尔比对钙基吸附剂性能的影响
IF 2.232 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-15 DOI: 10.1007/s12613-023-2657-y
Yumeng Li, Qing Zhao, Xiaohui Mei, Chengjun Liu, Henrik Saxén, Ron Zevenhoven

Steelmaking industry faces urgent demands for both steel slag utilization and CO2 abatement. Ca and Mg of steel slag can be extracted by acid solution and used to prepare sorbents for CO2 capture. In this work, the calcium-based sorbents were prepared from stainless steel slag leachate by co-precipitation, and the initial CO2 chemisorption capacity of the calcium-based sorbent prepared from steel slag with the Ca and Mg molar ratio of 3.64:1 was 0.40 g/g. Moreover, the effect of Ca/Mg molar ratio on the morphology, structure, and CO2 chemisorption capacity of the calcium-based sorbents were investigated. The results show that the optimal Ca/Mg molar ratio of sorbent for CO2 capture was 4.2:1, and the skeleton support effect of MgO in calcium-based sorbents was determined. Meanwhile, the chemisorption kinetics of the sorbents was studied using the Avrami-Erofeev model. There were two processes of CO2 chemisorption, and the activation energy of the first stage (reaction control) was found to be lower than that of the second stage (diffusion control).

炼钢行业对钢渣利用和二氧化碳减排都有迫切的需求。钢渣中的Ca和Mg可以用酸溶液萃取,制备捕集CO2的吸附剂。本文以不锈钢渣渗滤液为原料,采用共沉淀法制备了钙基吸附剂,在Ca和Mg摩尔比为3.64:1的条件下,钢渣制备的钙基吸附剂的初始CO2化学吸附量为0.40 g/g。此外,还研究了Ca/Mg摩尔比对钙基吸附剂的形貌、结构和CO2化学吸附能力的影响。结果表明,吸附CO2的最佳Ca/Mg摩尔比为4.2:1,并确定了钙基吸附剂中MgO的骨架支撑作用。同时,采用Avrami-Erofeev模型研究了吸附剂的化学吸附动力学。CO2化学吸附有两个过程,第一阶段(反应控制)的活化能低于第二阶段(扩散控制)的活化能。
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引用次数: 0
Effect of Sr2+ on 3D gel-printed Sr3−xMgx(PO4)2 composite scaffolds for bone tissue engineering Sr2+对3D凝胶打印Sr3−xMgx(PO4)2复合材料骨组织工程支架的影响
IF 2.232 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-15 DOI: 10.1007/s12613-023-2638-1
Hongyuan Liu, Jialei Wu, Siqi Wang, Jing Duan, Huiping Shao

Porous magnesium strontium phosphate (Sr3−xMgx(PO4)2) (x = 2, 2.5, 3) composite scaffolds were successfully prepared by three dimension gel-printing (3DGP) method in this study. The results show that Sr0.5Mg2.5(PO4)2 scaffolds had good compressive strength, and Sr1.0Mg2.0(PO4)2 scaffolds had good degradation rate in vitro. The weight loss rate of Sr1.0Mg2.0(PO4)2 scaffolds soaked in simulated body fluid (SBF) or 6 weeks was 6.96%, and pH value varied between 7.50 and 8.61, which was within the acceptable range of human body. Preliminary biological experiment shows that MC3T3-E1 cells had good adhesion and proliferation on the surface of Sr3−xMgx(PO4)2 scaffolds. Compared with pure Mg3(PO4)2 scaffolds, strontium doped scaffolds had excellent comprehensive properties, which explain that Sr3−xMgx(PO4)2 composite scaffolds can be used for bone tissue engineering.

本研究采用三维凝胶打印(3DGP)方法成功制备了多孔磷酸镁锶(Sr3−xMgx(PO4)2) (x = 2,2.5, 3)复合支架。结果表明,Sr0.5Mg2.5(PO4)2支架具有良好的抗压强度,Sr1.0Mg2.0(PO4)2支架具有良好的体外降解率。Sr1.0Mg2.0(PO4)2支架在模拟体液(SBF)中浸泡6周后失重率为6.96%,pH值在7.50 ~ 8.61之间变化,在人体可接受范围内。初步生物学实验表明,MC3T3-E1细胞在Sr3−xMgx(PO4)2支架表面具有良好的粘附和增殖能力。与纯Mg3(PO4)2支架相比,锶掺杂支架具有优异的综合性能,这说明Sr3−xMgx(PO4)2复合支架可用于骨组织工程。
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引用次数: 0
Erratum to: Phase-field simulation of lack-of-fusion defect and grain growth during laser powder bed fusion of Inconel 718 Inconel 718激光粉末床熔合过程中缺乏熔合缺陷和晶粒生长的相场模拟
IF 2.232 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-15 DOI: 10.1007/s12613-023-2769-4
Miaomiao Chen, Renhai Shi, Zhuangzhuang Liu, Yinghui Li, Qiang Du, Yuhong Zhao, Jianxin Xie
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引用次数: 0
Mechanically mixing copper and silver into self-supporting electrocatalyst for hydrogen evolution 将铜和银机械混合到用于析氢的自支撑电催化剂中
IF 2.232 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-11 DOI: 10.1007/s12613-023-2695-5
Xinzhuo Hu, Zhe Liu, Yi Feng, Yongfeng Zhang, Zhe Li, Zhennan Chen, Jing Mao, Jing Yang, Hui Liu, Pengfei Yin, Lei Cui, Xiwen Du

Commercial hydrogen production involves the development of efficient hydrogen evolution reaction catalysts. Herein, we adopted a friction stir processing (FSP) technique to mix immiscible metals homogenously and obtain a self-supporting copper–silver (CuAg) catalyst. The gust of Ag atoms with larger atomic sizes caused a tensile strain in the Cu matrix. Meanwhile, the chemical-potential difference induced electron transfer from Cu to Ag, and the two factors jointly led to the upshift of Cu d-band and improved the catalytic activity. Consequently, the CuAg electrode exhibited a high turnover frequency (12 times that of pure Cu), a low overpotential at high current density (superior to platinum foil), and high durability (1.57% decay over 180 h). Our work demonstrates that FSP is a powerful method for preparing self-supporting catalysts of immiscible alloys with high catalytic performance.

商业氢气生产涉及开发高效的析氢反应催化剂。在此,我们采用搅拌摩擦处理(FSP)技术将不混溶的金属均匀混合,获得了自支撑的铜-银(CuAg)催化剂。原子尺寸较大的Ag原子阵风在Cu基体中引起拉伸应变。同时,化学电势差诱导了电子从Cu向Ag的转移,这两个因素共同导致Cu d带的上移,提高了催化活性。因此,CuAg电极表现出高的转换频率(纯Cu的12倍)、在高电流密度下的低过电位(优于铂箔)和高耐久性(在180小时内衰减1.57%)。我们的工作表明,FSP是一种制备具有高催化性能的不混溶合金自支撑催化剂的有力方法。
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引用次数: 1
Uniform nanoplating of metallic magnesium film on titanium dioxide nanotubes as a skeleton for reversible Na metal anode 在二氧化钛纳米管上均匀纳米镀金属镁膜作为可逆Na金属阳极骨架
IF 2.232 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-11 DOI: 10.1007/s12613-023-2685-7
Jinshan Wang, Feng Li, Si Zhao, Lituo Zheng, Yiyin Huang, Zhensheng Hong

To meet the low-cost concept advocated by the sodium metal anode, this paper reports the use of a pulsed electrodeposition technology with ionic liquids as electrolytes to achieve uniform nanoplating of metallic magnesium films at around 20 nm on spaced titanium dioxide (TiO2) nanotubes (STNA-Mg). First, the sodiophilic magnesium metal coating can effectively reduce the nucleation overpotential of sodium metal. Moreover, three-dimensional STNA can limit the volume expansion during sodium metal plating and stripping to achieve the ultrastable deposition and stripping of sodium metals with a high Coulombic efficiency of up to 99.5% and a small voltage polarization of 5 mV in symmetric Na∥Na batteries. In addition, the comparative study of sodium metal deposition behavior of STNA-Mg and STNA-Cu prepared by the same route further confirmed the advantage of magnesium metal to guide sodium metal growth. Finally, the prepared STNA-Mg–Na metal anode and commercial sodium vanadium phosphate cathode were assembled into a full cell, delivering a discharge capacity of 110.2 mAh·g−1 with a retention rate of 95.6% after 110 cycles at 1C rate.

为了满足钠金属阳极倡导的低成本概念,本文报道了使用离子液体作为电解质的脉冲电沉积技术,在间隔的二氧化钛(TiO2)纳米管(STNA-Mg)上实现约20nm的金属镁膜的均匀纳米电镀。首先,亲钠金属镁涂层可以有效降低金属钠的成核过电位。此外,三维STNA可以限制钠金属电镀和剥离过程中的体积膨胀,以实现钠金属的超稳定沉积和剥离,在对称的钠电池中具有高达99.5%的高库仑效率和5mV的小电压极化。此外,通过对相同路线制备的STNA-Mg和STNA-Cu的钠金属沉积行为的比较研究,进一步证实了镁金属引导钠金属生长的优势。最后,将制备的STNA Mg–Na金属阳极和商用磷酸钒钠阴极组装成一个完整的电池,在1C速率下110次循环后,放电容量为110.2 mAh·g−1,保留率为95.6%。
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引用次数: 1
Recent advances and influencing parameters in developing electrode materials for symmetrical solid oxide fuel cells 对称固体氧化物燃料电池电极材料的研究进展及影响因素
IF 2.232 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-11 DOI: 10.1007/s12613-023-2694-6
Wan Nor Anasuhah Wan Yusoff, Nurul Akidah Baharuddin, Mahendra Rao Somalu, Andanastuti Muchtar, Nigel P. Brandon, Huiqing Fan

This article delivers a robust overview of potential electrode materials for use in symmetrical solid oxide fuel cells (S-SOFCs), a relatively new SOFC technology. To this end, this article provides a comprehensive review of recent advances and progress in electrode materials for S-SOFC, discussing both the selection of materials and the challenges that come with making that choice. This article discussed the relevant factors involved in developing electrodes with nano/microstructure. Nanocomposites, e.g., non-cobalt and lithiated materials, are only a few of the electrode types now being researched. Furthermore, the phase structure and microstructure of the produced materials are heavily influenced by the synthesis procedure. Insights into the possibilities and difficulties of the material are discussed. To achieve the desired microstructural features, this article focuses on a synthesis technique that is either the most recent or a better iteration of an existing process. The portion of this analysis that addresses the risks associated with manufacturing and the challenges posed by materials when fabricating S-SOFCs is the most critical. This article also provides important and useful recommendations for the strategic design of electrode materials researchers.

本文对对称固体氧化物燃料电池(S-SOFC)中使用的潜在电极材料进行了全面的概述,这是一种相对较新的SOFC技术。为此,本文全面回顾了S-SOFC电极材料的最新进展,讨论了材料的选择和选择所带来的挑战。本文讨论了开发纳米/微结构电极的相关因素。纳米复合材料,例如非钴和锂化材料,只是目前正在研究的几种电极类型。此外,所生产材料的相结构和微观结构在很大程度上受到合成过程的影响。讨论了对材料的可能性和困难的见解。为了实现所需的微观结构特征,本文重点介绍了一种合成技术,该技术是现有工艺的最新迭代或更好的迭代。该分析中涉及制造相关风险和制造S-SOFC时材料带来的挑战的部分是最关键的。本文还为电极材料研究人员的战略设计提供了重要而有用的建议。
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引用次数: 2
Enhanced energy-absorbing and sound-absorbing capability of functionally graded and helicoidal lattice structures with triply periodic minimal surfaces 具有三周期最小表面的功能梯度和螺旋晶格结构增强的能量吸收和吸声能力
IF 2.232 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-11 DOI: 10.1007/s12613-023-2684-8
Miao Zhao, Zhendong Li, Jun Wei Chua, Chong Heng Lim, Xinwei Li

Lattice structures have drawn much attention in engineering applications due to their lightweight and multi-functional properties. In this work, a mathematical design approach for functionally graded (FG) and helicoidal lattice structures with triply periodic minimal surfaces is proposed. Four types of lattice structures including uniform, helicoidal, FG, and combined FG and helicoidal are fabricated by the additive manufacturing technology. The deformation behaviors, mechanical properties, energy absorption, and acoustic properties of lattice samples are thoroughly investigated. The load-bearing capability of helicoidal lattice samples is gradually improved in the plateau stage, leading to the plateau stress and total energy absorption improved by over 26.9% and 21.2% compared to the uniform sample, respectively. This phenomenon was attributed to the helicoidal design reduces the gap in unit cells and enhances fracture resistance. For acoustic properties, the design of helicoidal reduces the resonance frequency and improves the peak of absorption coefficient, while the FG design mainly influences the peak of absorption coefficient. Across broad range of frequency from 1000 to 6300 Hz, the maximum value of absorption coefficient is improved by 18.6%–30%, and the number of points higher than 0.6 increased by 55.2%–61.7% by combining the FG and helicoidal designs. This study provides a novel strategy to simultaneously improve energy absorption and sound absorption properties by controlling the internal architecture of lattice structures.

格构结构由于其轻量化和多功能性,在工程应用中备受关注。在这项工作中,提出了一种具有三周期最小表面的功能梯度(FG)和螺旋晶格结构的数学设计方法。采用增材制造技术制备了均匀、螺旋、FG和FG与螺旋相结合的四种晶格结构。对晶格样品的变形行为、力学性能、能量吸收和声学性能进行了深入研究。螺旋晶格样品的承载能力在平台阶段逐渐提高,导致平台应力和总能量吸收分别比均匀样品提高了26.9%和21.2%以上。这种现象归因于螺旋形设计减少了晶胞中的间隙并提高了抗断裂性。在声学性能方面,螺旋面的设计降低了谐振频率,提高了吸收系数的峰值,而FG的设计主要影响吸收系数的峰。在1000-6300Hz的宽频率范围内,FG和螺旋设计相结合,吸收系数的最大值提高了18.6%-30%,高于0.6的点数增加了55.2%-61.7%。这项研究提供了一种新的策略,通过控制晶格结构的内部结构来同时提高能量吸收和吸声性能。
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引用次数: 2
Crystalline framework nanosheets as platforms for functional materials 作为功能材料平台的结晶框架纳米片
IF 2.232 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-11 DOI: 10.1007/s12613-023-2696-4
Yun Fan, Cheng Chen, Siyao Zhang, Suoying Zhang, Fengwei Huo, Weina Zhang

The integration of organic and inorganic materials has been widely used in various applications to generate novel functional nano-materials characterized by unique properties. Functional crystalline framework nanosheets and their synergistic effects have been studied recently for possessing the advantages of functional species as well as crystalline framework nanosheets. Hence, we have focused on the preparation methods and applications of functional crystalline framework nanosheets in this review. We introduced crystalline framework nanosheets and discussed the importance of integrating functional species with nanosheets to form functional crystalline framework nanosheets. Then, two aspects of the preparation methods of functional crystalline framework nanosheets were reviewed: in situ synthesis and post-synthesis modification. Subsequently, we discussed the properties of the crystalline framework nanosheets combined with various functional species and summarized their applications in catalysis, sensing, separation, and energy storage. Finally, we have shared our insights on the challenges of functional crystalline framework nanosheets, hoping to contribute to the knowledge base for optimizing the preparation methods, expanding categories, improving stability, and exploring potential applications.

有机和无机材料的结合已被广泛应用于各种应用中,以产生具有独特性能的新型功能纳米材料。近年来,由于具有功能物种和晶体骨架纳米片的优点,人们对功能性晶体骨架纳米片材及其协同效应进行了研究。因此,本文重点介绍了功能性晶体骨架纳米片的制备方法和应用。我们介绍了晶体框架纳米片,并讨论了将功能物种与纳米片结合以形成功能性晶体框架纳米板的重要性。然后,从原位合成和合成后修饰两个方面综述了功能性结晶骨架纳米片的制备方法。随后,我们讨论了与各种功能物种结合的结晶骨架纳米片的性质,并总结了它们在催化、传感、分离和储能方面的应用。最后,我们分享了我们对功能性晶体框架纳米片挑战的见解,希望为优化制备方法、扩大类别、提高稳定性和探索潜在应用提供知识库。
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引用次数: 1
Introducing oxygen vacancies in TiO2 lattice through trivalent iron to enhance the photocatalytic removal of indoor NO 通过三价铁在TiO2晶格中引入氧空位增强室内NO的光催化去除
IF 2.232 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-11 DOI: 10.1007/s12613-023-2611-z
Peng Sun, Sumei Han, Jinhua Liu, Jingjing Zhang, Shuo Yang, Faguo Wang, Wenxiu Liu, Shu Yin, Zhanwu Ning, Wenbin Cao

The synthesis of oxygen vacancies (OVs)-modified TiO2 under mild conditions is attractive. In this work, OVs were easily introduced in TiO2 lattice during the hydrothermal doping process of trivalent iron ions. Theoretical calculations based on a novel charge-compensation structure model were employed with experimental methods to reveal the intrinsic photocatalytic mechanism of Fe-doped TiO2 (Fe–TiO2). The OVs formation energy in Fe–TiO2 (1.12 eV) was only 23.6% of that in TiO2 (4.74 eV), explaining why Fe3+ doping could introduce OVs in the TiO2 lattice. The calculation results also indicated that impurity states introduced by Fe3+ and OVs enhanced the light absorption activity of TiO2. Additionally, charge carrier transport was investigated through the carrier lifetime and relative mass. The carrier lifetime of Fe–TiO2 (4.00, 4.10, and 3.34 ns for 1at%, 2at%, and 3at% doping contents, respectively) was longer than that of undoped TiO2 (3.22 ns), indicating that Fe3+ and OVs could promote charge carrier separation, which can be attributed to the larger relative effective mass of electrons and holes. Herein, Fe–TiO2 has higher photocatalytic indoor NO removal activity compared with other photocatalysts because it has strong light absorption activity and high carrier separation efficiency.

在温和的条件下合成氧空位(OVs)修饰的TiO2是有吸引力的。在这项工作中,在三价铁离子的水热掺杂过程中,OVs很容易被引入TiO2晶格。采用基于新型电荷补偿结构模型的理论计算和实验方法,揭示了Fe掺杂TiO2(Fe–TiO2)的内在光催化机理。Fe–TiO2(1.12 eV)中的OVs形成能仅为TiO2(4.74 eV)的23.6%,这解释了为什么Fe3+掺杂会在TiO2晶格中引入OVs。计算结果还表明,Fe3+和OVs引入的杂质态增强了TiO2的光吸收活性。此外,通过载流子寿命和相对质量研究了电荷载流子输运。Fe–TiO2的载流子寿命(对于1at%、2at%和3at%的掺杂含量,分别为4.00、4.10和3.34ns)比未掺杂的TiO2的载流子生命(3.22ns)长,表明Fe3+和OVs可以促进电荷载流子分离,这可归因于电子和空穴的较大的相对有效质量。在此,与其他光催化剂相比,Fe–TiO2具有更高的光催化室内NO去除活性,因为它具有较强的光吸收活性和较高的载流子分离效率。
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引用次数: 1
Efficient utilization of glass fiber separator for low-cost sodium-ion batteries 玻璃纤维隔膜在低成本钠离子电池中的高效利用
IF 2.232 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-11 DOI: 10.1007/s12613-023-2691-9
Xiaohang Ma, Zhijie Chen, Tianwen Zhang, Xueqian Zhang, Yuan Ma, Yanqing Guo, Yiyong Wei, Mengyuan Ge, Zhiguo Hou, Zhenfa Zi

The separator is a key component of sodium-ion battery, which greatly affects the electrochemical performances and safety characteristics of the battery. Conventional glass fiber separator cannot meet the requirements of large-scale application because of high cost and poor mechanical properties. Herein, the novel composite separators are prepared by a simple slurry sieving process using glass fiber separator scraps and ordinary qualitative filter paper as raw materials. As the composite mass ratio is 1:1, the composite separator has excellent comprehensive properties, including tensile strength of 15.8 MPa, porosity of 74.3%, ionic conductivity of 1.57 × 10−3 S·cm−1 and thermal stability at 210°C. The assembled sodium-ion battery shows superior cycling performance (capacity retention of 94.1% after 500 cycles at 1C) and rate capacity (retention rate of 87.3% at 10C), and it maintains fine interface stability. The above results provide some new ideas for the separator design of high-performance and low-cost sodium-ion batteries.

隔膜是钠离子电池的关键部件,它在很大程度上影响着电池的电化学性能和安全特性。传统的玻璃纤维分离器由于成本高、力学性能差,无法满足大规模应用的要求。本文以玻璃纤维分离器废料和普通定性滤纸为原料,通过简单的浆料筛分工艺制备了新型复合分离器。当复合材料质量比为1:1时,复合隔膜具有优异的综合性能,包括15.8MPa的拉伸强度、74.3%的孔隙率、1.57×10−3 S·cm−1的离子电导率和210°C的热稳定性。组装的钠离子电池显示出优异的循环性能(在1C下500次循环后的容量保持率为94.1%)和倍率容量(在10C下的保持率为87.3%),并保持良好的界面稳定性。上述结果为高性能、低成本钠离子电池隔膜的设计提供了一些新的思路。
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引用次数: 1
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