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First-principles comprehensive study of electronic and mechanical properties of novel uranium hydrides at different pressures
Publication date: Available online 13 February 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Min Liu, Yongpeng Shi, Mingfeng Liu, Dianzhong Li, Wenlin Mo, Tao Fa, Bin Bai, Xiaolin Wang, Xingqiu ChenAbstractThe systematic investigation on the U–H binary system up to 300 GPa has been performed by means of first-principles calculations in combination with the variable-composition evolutionary algorithm. Twenty uranium hydrides, including UHx (x = 1, 2, 3, 4, 5, 6, 7, 8, 9, 17), U2Hy (y = 3, 5, 7, 13, 15, 17), U3H8, U3H10, U4H5 and U4H9 have been found under different pressures. Besides thir...
Source: Progress in Natural Science: Materials International - February 15, 2020 Category: Materials Science Source Type: research

Magnetically separable and visible light-active Ag/NiCo2O4 nanorods prepared by a simple route for superior photodegradation of atrazine in water
Publication date: Available online 13 February 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Ahmed Shawky, Maha Alhaddad, R.M. Mohamed, Nasser S. Awwad, Hala A. IbrahiumAbstractAtrazine (ATZ) is a known herbicide used in agriculture and caused many concerns according to its toxicity. Herein, we have prepared NiCo2O4 nanorods that can work as a photocatalyst under visible light exposure by Ag loading through a simple route. The characterizations revealed the role of Ag for improving the structural, optical and optoelectronic properties of the produced photocatalyst. The Ag loading with 5 wt% co...
Source: Progress in Natural Science: Materials International - February 15, 2020 Category: Materials Science Source Type: research

Synthesis, characterization of a DOPO-based polymeric flame retardant and its application in polyethylene terephthalate
Publication date: Available online 13 February 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Xiang Ao, Ya Du, Dan Yu, Wei Wang, Weizhong Yang, Bin Sun, Meifang ZhuAbstractA high molecular weight DOPO-based flame retardant (DP-DE) containing phosphorus linked pendent groups was synthesized by a two-step esterification and polycondensation reaction, and characterized by Fourier transform infrared spectroscopy (FTIR), 13C nuclear magnetic resonance (13C NMR) and gel permeation chromatography (GPC). After added into polyethylene terephthalate (PET) via melt-blending method, the flame retardancy of ...
Source: Progress in Natural Science: Materials International - February 15, 2020 Category: Materials Science Source Type: research

Simultaneous acquisition of Fe3O4 monocrystals: Tunable magnetic properties with various morphologies
Publication date: Available online 12 February 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Zemin Zheng, Yiming Cao, Zhe Li, Huiyong Li, Dafeng Hu, Hao Jiang, Xuemin Geng, Jiangwei Lu, Xudong Zhang, Peng Yang, Yanfen WanAbstractFe3O4 nanoparticles (NPs) with a face-centered cubic (fcc) structure and two different morphologies (nanospheres and nanoprisms) were synthesized by a facile one-step method. The synthesized Fe3O4 nanospheres and nanoprisms were monocrystalline and separable in a magnetic field. In different volume ratios of oleylamine (OAm) to dibenzyl ether, the sizes of the prepared ...
Source: Progress in Natural Science: Materials International - February 13, 2020 Category: Materials Science Source Type: research

Microstructure/texture evolution maps to optimize hot deformation process of near-α titanium alloy
Publication date: Available online 12 February 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Zhixin Zhang, Jiangkun Fan, Bin Tang, Hongchao Kou, Jian Wang, Zhiyong Chen, Jinshan LiAbstractThe microstructure/texture evolution (MTE, for short) map and processing map of a new near α titanium alloy Ti65 were constructed in order to investigate the workability and microstructure evolution of hot deformation. The processing map illustrated four domains, two summit domains and two instability domains. The morphologies of the α phase changed from the spheroidization (α+β region) to the deformed and...
Source: Progress in Natural Science: Materials International - February 13, 2020 Category: Materials Science Source Type: research

Sodium-ion capacitors with superior energy-power performance by using carbon-based materials in both electrodes
Publication date: Available online 12 February 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Hongwei Zhang, Mingxiang Hu, Zheng-Hong Huang, Feiyu Kang, Ruitao LvAbstractNa-ion capacitors (NICs) are promising energy storage devices in virtue of their merits in combining the high energy densities of secondary batteries and the high power densities of supercapacitors. However, it is still very challenging to achieve a balanced energy-power performance in NIC device due to the kinetic imbalance between the battery-type anode and the capacitive-type cathode. In this work, an NIC device based on carb...
Source: Progress in Natural Science: Materials International - February 13, 2020 Category: Materials Science Source Type: research

Microstructural evolution in the surface of Ti–10V–2Fe–3Al alloy by solution treatments
Publication date: Available online 12 February 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Lichun Qi, Kaichao Zhang, Xueliang Qiao, Lijun Huang, Xu Huang, Xinqing ZhaoAbstractBy solution treatments in vacuum and in air, the surface region of Ti–10V–2Fe–3Al exhibits different microstructures from the interior region of the alloy. When solution treated in vacuum, the microstructure of the specimen is composed of dominant β phase and a few of α″ martensite in surface region, with a large amount of α″ martensite and a little of β phase in interior. When solution treated in air, the ...
Source: Progress in Natural Science: Materials International - February 13, 2020 Category: Materials Science Source Type: research

The first principle calculation of elemental-vacancy-assisted modifications on structural properties and optical responses of ZnO system
Publication date: Available online 13 February 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Shibghatullah Muhammady, Suryana Suryana, Fatimah Arofiati Noor, Yudi DarmaAbstractThe structural properties and optical responses of ZnO0.94 and Zn0.94O systems as the possible models of ZnO system containing elemental defect states were studied using the plane-wave method within the generalized gradient approximation. The pristine ZnO system was used as the reference. The simulated XRD patterns showed the three highest intensity for (100), (002), and (101) orientations for all the systems. Compared to...
Source: Progress in Natural Science: Materials International - February 13, 2020 Category: Materials Science Source Type: research

Hollow bismuth ferrite combined graphene as advanced anode material for sodium-ion batteries
Publication date: Available online 13 February 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Xuli Ding, Yi LiuAbstractHollow bismuth ferrite nanofibers were fabricated via simple electrospinning process, and the storage properties of Na-ions were investigated by atmospheric pressure X-ray photoelectron spectrum (APXPS) and Synchrotron Radiation. The results show that the hollow bismuth ferrite nanotubes demonstrate impressive sodium storage properties and good cycling stability that the specific capacity can exceed 500 mA h g-1 and the cycle number reaches several hundred cycles. The graphene...
Source: Progress in Natural Science: Materials International - February 13, 2020 Category: Materials Science Source Type: research

Facile synthesis of hierarchical hollow Mn-ZSM-5 zeolite for enhanced cyclohexane catalytic oxidation
In this study, hierarchical hollow ZSM-5 zeolite was synthesized via a facile one-pot hydrothermal process during which a few amount of polyvinylpyrrolidone (PVP) was added. The synthesized ZSM-5 zeolite catalysts were characterized by the XRD, BET-BJH, TEM, FE-SEM, EDS, ICP-AES, XPS and intrusion/extrusion mercury analysis. The results showed that such hierarchical hollow ZSM-5 zeolite as micro-reactor after the modification by Mn species displayed excellent activity with a conversion of 98.7% and an overall selectivity of 97.6% for mild oxidation of cyclohexane to cyclohexanol and cyclohexanone (KA oil) at 70 °C, makin...
Source: Progress in Natural Science: Materials International - February 13, 2020 Category: Materials Science Source Type: research

Layered carbon-based pseudocapacitive materials for lithium/sodium-ion capacitor with high energy-power densities and long cycle life
Publication date: Available online 11 February 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Mingxiang Hu, Hongwei Zhang, Ruitao LvAbstractHybrid ion capacitors that combined high-power density of supercapacitor and high-energy density of battery are drawing attention to insufficient power densities of currently-used lithium-ion batteries (LIBs). Two kinds of layered carbon-based pseudocapacitive materials were used as both anode and cathode for lithium/sodium ion capacitors (LICs/NICs) with balanced energy/power properties. As-assembled NIC and LIC could deliver the energy densities of 125.7 ...
Source: Progress in Natural Science: Materials International - February 13, 2020 Category: Materials Science Source Type: research

Thermoelectric properties of phase separated Ti substituted Zr0.75Hf0.25NiSn0.985Sb0.015 half-Heuslers
Publication date: Available online 23 January 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Rizwan Akram, Yonggao Yan, Mozaffar Hussain, Xiaoyu She, Xinfeng TangAbstractSb is a very effective dopant for ZrNiSn based half-Heusler alloys. The effect of Ti substitution on Zr0.75Hf0.25NiSn0.985Sb0.015 half-Heusler (HH) semiconductor alloys has been investigated to explore the structural modifications and composition variation. TixHf0.25 Zr0.75-xNiSn0.985Sb0.015 (x = 0, 0.15, 0.30, 0.45) alloys were synthesized by induction melting. A set of samples was also annealed for comparative studies. The s...
Source: Progress in Natural Science: Materials International - January 25, 2020 Category: Materials Science Source Type: research

Effects of homogenization on the dissolution and precipitation behaviors of intermetallic phase for a Zr and Er containing Al–Zn–Mg–Cu alloy
Publication date: Available online 23 January 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Yuanchun Huang, Chuanchao Zhang, Yunlong Ma, Yu LiuAbstractThe effects of homogenization on dissolution and precipitation behaviors of intermetallic phase in a novel Zr and Er containing Al–Zn–Mg–Cu alloy were investigated. In this work, single-stage (SS:475 °C/24 h) and double-stage (DS:400 °C/12 h + 475 °C/24 h) homogenization treatments were carried out for the ingots with the heating rates of 300 °C/h, 50 °C/h and 25 °C/h, respectively. It was found that Er tended to segregate ...
Source: Progress in Natural Science: Materials International - January 25, 2020 Category: Materials Science Source Type: research

Microstructure evolution and mechanical properties of Ti–8Nb–2Fe-0.2O alloy with high elastic admissible strain for orthopedic implant applications
Publication date: Available online 22 January 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Yu Fu, Junshuai Wang, Wenlong Xiao, Xinqing Zhao, Chaoli MaAbstractA Ti–8Nb–2Fe-0.2O (wt.%) alloy with high strength, high elastic admissible strain (δ) and low cost was designed using d-electron theory combined with electron-to-atom ratio (e/a‾) approach. Interstitial oxygen was introduced to strengthen the matrix of the alloy. The β-solution treated alloy was mainly composed of α″ martensite with internal {111}α″ type I nano-twins. The α″ martensite with hexagonal-like crystal structur...
Source: Progress in Natural Science: Materials International - January 23, 2020 Category: Materials Science Source Type: research

Effect of high magnetic field on the recovery of tempered martensite
Publication date: Available online 22 January 2020Source: Progress in Natural Science: Materials InternationalAuthor(s): Guanghui Wu, Tingping Hou, Zihua Li, Long Chen, Hengfu Lin, Kaiming WuAbstractInfluence of a 12 T high magnetic field on the recovery of tempered martensite in the chromium-containing steel was investigated. The results showed that a high magnetic field caused the percentage of low angle boundaries θ between 5° ~ 8° to increase by about 8%, while correspondingly decreased the percentage of high angle boundaries (>15°) by 9%. With the application of the magnetic field, the strain energy increased due...
Source: Progress in Natural Science: Materials International - January 23, 2020 Category: Materials Science Source Type: research