JOM
·
2023
·Vol. 75
·期 11
·4910-4921
·
IF 2.6
Zhang Jiahe,Feng Wenyu,Cao Huazhen,Zhang Huibin,Zheng Guoqu
This study explored a highly selective and efficient oxidation system for the recovery of rhenium resources from Re-rich arsenic sulfide slag containing significant quantities of arsenic. The effects of H 2 O 2 dosage, initial H 2 SO 4 concentration and leaching temperature on the Re, As and Bi extraction efficiency were investigated in detail. The results demonstrated that under the most favorable conditions of 20 mL H 2 O 2 , 70°C, 0.25 mol L −1 H 2 SO 4 solution, the Re extraction efficiency can reach 99.2%. The phase transitions of the main constituents of the slag, Re, As and Bi were analyzed. ReS 2 and Re 2 S 7 in the Re-rich arsenic sulfide slag were transformed to ReO 4 − , impelling Re to enter the leachate. Bi and As were oxidized and entered the leachate in ionic form under a limited H 2 O 2 dosage. As the H 2 O 2 dosage increased, the concentration of Bi and As in the leachate reached a threshold value and transformed to stable BiAsO 4 , resulting in the attenuation of As and Bi extraction efficiency. This process considerably promoted the selective leaching of Re and the separation of Re from As and Bi. Kinetic analysis shows that the leaching process is controlled by chemical reaction with an apparent activation energy of 29.05 kJ mol −1 .
研究领域:
冶金工程
·
化学工程
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产品关联
DOI
高影响因子
HYDROMETALLURGY
·
2023
·
IF 4.7
Anyang Tang,Jiahe Zhang,Huazhen Cao,Huibin Zhang,Guoqu Zheng
The synthesis of refractory rhenium (Re) powders is significant for the production of rhenic products. In this work, the ultra-fine Re nanoparticles were synthesized via a combination of aqueous-phase reduction and rapid hydrogen reduction using NH 4 ReO 4 as Re source. The theoretical reduction route was determined by investigating the Eh-pH diagram of the Re -H 2 O system and conducting thermodynamic calculations. The optimal results were achieved by adjusting the experimental parameters like acid type, initial acidity, molar ratio of BH 4 − : ReO 4 − , feed rate of reductant, reaction temperature (T), and reaction time (t). The amorphous Re powders with minor oxide inclusions can be prepared under the optimized conditions of [HCl] = 1.35 mol L −1 , BH 4 − : ReO 4 − molar ratio = 5.32, feed rate = 15 mL min −1 , reaction temperature = 30 °C, and reaction time = 30 min. The maximum reduction efficiency reaches 99.5%. After annealing in hydrogen for 30 min, the crystalline Re nanoparticles with low oxygen content can be obtained. This work demonstrates the feasibility and efficacy of rapidly synthesizing ultra-fine Re nanoparticles in a solution-based approach.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Qinming He,Jiangpeng Zhou,Weiqing Tang,Yufeng Hao,Litao Sun,Chongyang Zhu,Feng Xu,Jiajun Chen,Yaping Wu,Zhiming Wu,Binbin Xu,Gaohong Liu,Xu Li,Chunmiao Zhang,Junyong Kang
Among large numbers of transition metal dichalcogenides (TMDCs), monolayer rhenium disulfide (ReS2) is of particular interest due to its unique structural anisotropy, which opens up unprecedented opportunities in dichroic atomical electronics. Understanding the domain structure and controlling the anisotropic evolution of ReS2 during the growth is considered critical for increasing the domain size toward a large-scale growth of monolayer ReS2. Herein, by employing angle-resolved Raman spectroscopy, we reveal that the hexagonal ReS2 domain is constructed by six well-defined subdomains with each b-axis parallel to the diagonal of the hexagon. By further combining the first-principles calculations and the transmission electron microscopy (TEM) characterization, a dislocation-involved anisotropic evolution is proposed to explain the formation of the domain structures and understand the limitation of the domain size. Based on these findings, growth rates of different crystal planes are well controlled to enlarge the domain size, and moreover, single-crystal domains with a triangle shape are obtained. With the improved domain size, large-scale uniform, strictly monolayer ReS2 films are grown further. Scalable field-effect transistor (FET) arrays are constructed, which show good electrical performances comparable or even superior to that of the single domains reported at room temperature. This work not only sheds light on comprehending the novel growth mechanism of ReS2 but also offers a robust and controllable strategy for the synthesis of large-area and high-quality two-dimensional materials with low structural symmetry.
研究领域:
材料科学
·
物理学
·
纳米技术
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DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 16
·2839
·
IF 5.719
Yuruo Zheng,Ghulam Hussain,Shuyi Li,Shanta Batool,Xiawa Wang
In this work, nanoparticles of Co1−xRexFe2O4and CoFe2−xRexO4(0 ≤ x ≤ 0.05) were synthesized by the sol-gel method. The Rietveld refinement analysis of XRD and Raman data revealed that all of the prepared samples were single phase with a cubic spinel-type structure. With the substitution of Re, the lattice parameters were slightly increased, and Raman spectra peak positions corresponding to the movement of the tetrahedral sublattice shifted to a higher energy position. Furthermore, Raman spectra showed the splitting of T2gmode into branches, indicating the presence of different cations at crystallographic A- and B-sites. The SEM micrograph confirms that surface Re exchange changes the coordination environment of metals and induces Fe-site structure distortion, thereby revealing more active sites for reactions and indicating the bulk sample’s porous and agglomerated morphology. The vibrating sample magnetometer (VSM) results demonstrated that the synthesized nanoparticles of all samples were ferromagnetic across the entire temperature range of 300–4 K. The estimated magnetic parameters, such as the saturation magnetization, remanent magnetization, coercivity, blocking temperature (TB), and magnetic anisotropy, were found to reduce for the Co-site doping with the increasing doping ratio of Re, while in the Fe site, they enhanced with the increasing doping ratio. The ZFC-FC magnetization curve revealed the presence of spin-glass-like behavior due to the strong dipole–dipole interactions in these ferrite nanoparticles over the whole temperature range. Finally, the dielectric constant (εr′) and dielectric loss (tanδ) were sharply enhanced at low frequencies, while the AC conductivity increased at high frequencies. The sharp increases at high temperatures are explained by enhancing the barrier for charge mobility at grain boundaries, suggesting that samples were highly resistive. Interestingly, these parameters (εr′,tanδ) were found to be higher for the Fe-site doping with the increasing Re doping ratio compared with the Co site.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
Nuclear Materials and Energy
·
2024
·
IF 2.3
Y.J. Fu,H. Wang,Z.M. Xie,R. Liu,X.P. Wang,Q.F. Fang,C.S. Liu,X.B. Wu
Bulk W-0.5 wt%ZrC (W-ZrC), W-1 wt%Re-0.5 wt%ZrC (W-1Re-ZrC), and W-3 wt%Re-0.5 wt%ZrC (W-3Re-ZrC) alloys were prepared and exposed to He 2+ ion irradiation with an incident energy of 500 keV at 400 °C. Post-irradiation analysis revealed the formation of He bubbles, with consistent number density and average size across all alloys. However, the W-3Re-ZrC alloy exhibited a notably higher density of dislocation loops within grain interiors compared to W-ZrC and W-1Re-ZrC. This led to a significant increase in the hardening rate of W-3Re-ZrC to 61.5 %, nearly twice that of the other alloys. By considering the binding energies of He-vacancy, He-He, and Re-He, the formation and growth behavior of irradiation-induced defects, including He bubbles and dislocation loops, were also discussed. This work provides valuable insight into the relationships among Re alloying, He-induced defects, and irradiation hardening in Re-alloyed W materials, thus offering valuable guidance for the design of W-based plasma-facing materials.
研究领域:
材料科学
·
核能工程
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Lulu Yang,Shunkai Lu,Hui Wang,Qi Shao,Fan Liao,Mingwang Shao
Amorphous rhenium nanoparticles modified silicon nanowires were prepared via reducing Re ion by Si H bonds, which were employed to electrocatalysize the hydrogen evolution reaction because amorphous structure may have excellent catalytic activity. It is interesting that an obvious self-activation for Re/Si catalysts was observed with the current density enhanced by 2.2 times its previous value at 400 mV after a 3,000 s of continuous cyclic voltammetry scanning, and the catalytic performance remained steady thereafter. The optimal electrocatalytic performance was found with the Re: Si mass ratio of 31.1: 68.9, resulting in a Tafel slope of 81 mV·dec −1 and overpotential of 100 mV at current density of 10 mA·cm −2 .
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2015
·
IF 4.494
Jingyun Wang,Mingdong Zhou,Yuguo Yuan,Quan Zhang,Xiangchen Fang,Shuliang Zang
Quaternary ammonium perrhenates were applied as catalyst to promote the hydrolysis of cellulose in 1-allyl-3-methylimidazolium chloride ([Amim]Cl). The quaternary ammonium perrhenates displayed good catalytic performance for cellulose hydrolysis. Water was also proven to be effective to promote cellulose hydrolysis. Accordingly, 97% of total reduced sugar (TRS) and 42% of glucose yields could be obtained under the condition of using 5 mol% of tetramethyl ammonium perrhenate as catalyst, 70 μL of water, ca. 0.6 mmol of microcrystalline cellulose (MCC) and 2.0 g of [Amim]Cl as solvent under microwave irradiation for 30 min at 150 °C (optimal conditions). The influence of quaternary ammonium cation on the efficiency of cellulose hydrolysis was examined based on different cation structures of perrhenates. The mechanism on perrhenate catalyzed cellulose hydrolysis is also discussed, whereas hydrogen bonding between ReO 4 anion and hydroxyl groups of cellulose is assumed to be the key step for depolymerization of cellulose.
研究领域:
生物化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jing Xu,Zhong Dong,Ke-Jing Huang,Tian Wang,Yuanyuan Qi,Yingxin Sun,Xu Wu
Currently, the rapid capacity decay of single transition metal sulfide greatly limits its commercial application. In this work, we adopt a simple template method to prepare three-dimensional (3D) hollow nanospheres assembled with ultra-thin nanosheets. The large specific surface area of hollow structure can give a rich electrochemical active site and increase the contact area between the electrode and the electrolyte to promote mass and charge transfer rate, meanwhile, the ultra-thin permeable shell can significantly shorten the ions and electrons path. Moreover, the large layer spacing of MoS 2 /ReS 2 is conducive to the reversible ion reaction, and improves the battery rate and cycle performance. Finally, the rational design and control of heterostructural electrodes with different forms, structures and composition can significantly improve their electrochemical performance for various energy storage components. This work proves the potential application of MoS 2 /ReS 2 material as an effective electrode material for sodium ion batteries, and provides a reference idea for the new materials construction.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Huaxiong Liu,Biao Chen,Hongye Qin,Ning Wang,Enzuo Liu,Chunsheng Shi,Naiqin Zhao
Transition metal dichalcogenides (TMDs) have been widely studied as a promising sulfur host material in Li-S batteries due to their unique physical and chemical properties. Great efforts have been made to prepare carbon/TMDs, especially graphene/TMDs heterostructures as the cathodes of Li-S batteries. Recently, ReS 2 shows a new 1T′ phase and great potential in Li-S batteries because of its stable structure and a large amount of catalytic active sites. Herein, we prepared a new ReS 2 nanosheets anchored on rGO (rGO/1T′-ReS 2 ) composite as a lithium polysulfides (LiPSs) immobilizer and electrocatalyst for Li-S batteries. The unique pore structure and rGO incorporation can effectively mitigate volume expansion and enhance electronical conductivity. Moreover, the novel 1T′ phase of ReS 2 shows both efficient chemical adsorption function and large electrocatalytic active sites of LiPSs . These advantages have been demonstrated by both characterization techniques and theoretical calculations. As a result, the rGO/1T′-ReS 2 /S nanosheets display significantly enhanced coulombic efficiency, rate performance and cycling stability compared with the rGO/S nanosheets and the rGO/1T′-ReS 2 /S nanospheres.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Pigment & Resin Technology
·
2021
·Vol. 52
·期 1
·123-133
·
IF 1.263
Jun Zhang,Xiaojian Ou,Lin Li,Qianqian Chen,Zifan Zhang,Ting Huo,Xiaoyu Lin,Fangfang Niu,Shengyuan Zhao,Fang We,Hui Li,Chunli Liu,Zhenbin Chen,Sujun Lu,Peng Zhang,Jinian Zhu
Purpose A novel grafted temperature-responsive ReO 4 − Imprinted composite membranes (Re-ICMs) was successfully prepared by using polyvinylidene fluoride (PVDF) resin membranes as substrates, this study aimed to separate and purify ReO effectively. Design/methodology/approach Re-ICMs were synthesized by PVDF resin membranes as the substrate, acrylic acid (AA), acrylamide (AM), ethylene glycol dimethacrylate (EGDMA) were functional monomers. The morphology and structure of Re-ICMs were characterized by scanning electron microscope and Fourier transform infrared spectroscopy. Findings The maximum adsorption capacity toward ReO 4 − was 0.1,163 mmol/g and the separation decree had relation to MnO 4 − was 19.3. The optimal operation conditions were studied detailedly and the results as follows: the molar ratios of AA, AM, EGDMA, ascorbic acid, NH4ReO 4 , were 0.8, 0.96, 0.02, 0.003 and 0.006. The optimal time and temperature were 20 h and 40°C, respectively. The Langmuir and pseudo-second-order models were fit these adsorption characteristics well. Practical implications Rhenium (Re) is mainly used to chemical petroleum and make superalloys for jet engine parts. This study was representing a technology in separate and purify of Re, which provided a method for the development of the petroleum and aviation industry. Originality/value This contribution provided a novel method to separate ReO 4 − from MnO 4 − . The maximum adsorption capacity was 0.1163 mmol/g at 35°C and the adsorption equilibrium time was within 2 h. Meanwhile, the adsorption selectivity rate ReO 4 − /MnO 4 − was 19.3 and the desorption rate was 78.3%. Controlling the adsorption experiment at 35°C and desorption experiment at 25°C in aqueous solution, it could remain 61.3% of the initial adsorption capacity with the adsorption selectivity rate of 13.3 by 10 adsorption/desorption cycles, a slight decrease, varied from 78.3% to 65.3%, in desorption rate was observed.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2024
·
IF 4.8
Shuai Ma,Di Dong,Mengyao Zhang,Ye Gao,Zhuangzhi Wu,Dezhi Wang
W-Re-HfC alloys have been extensively applied in the field of high-temperature structural parts. To ensure high temperature reliability, it is essential to enhance creep resistance ability. In this study, the microstructures of forged W-Re-HfC alloys were adjusted using different heat treatment processes . The corresponding tensile creep properties were also measured at 2000 °C with 40 MPa. Furthermore, a possible creep fracture mechanism was also explored. The forged W-Re-HfC sample annealed for 2 h exhibited the best creep performances with a steady-state creep rate of 3.28 × 10 −6 and a creep life of 5.6 h. Generally, a larger grain size indicates a lower steady-state creep rate; however, the precipitation of carbides at the grain boundaries (GBs) deteriorates the bonding strength of interfaces, thus reversing the former trend. The dominant creep mechanism is diffusion creep , in which the voids nucleate perpendicular to the GBs, grow and connect into cracks, ultimately leading to fractures.
研究领域:
材料科学
·
金属学与热处理
·
高温结构材料
·
固态物理
·
力学性能
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2020
·
IF 2.463
Xueyu Wang,Xiaoyang Hu,Lianjun Song,Xiuying Yang,Qian Xiao,Haowei Xu,Songdong Ding
The two DOTA-tetraamide ligands, DOTAM- n -butyl (1,4,7,10-tetrakis[( N - n -butyl; carbamoyl)methyl]-1,4,7,10-tetraazacyclododecane) and DOTAM-benzyl (1,4,7,10- tetrakis[( N -benzylcarbamoyl)methyl]-1,4,7,10-tetraazacyclododecane), were synthesized and characterized by MS, NMR and FTIR spectra. In acid solution, DOTAM- n -butyl was liable to be protonated. FTIR, 1 H NMR, ESI-MS spectra and X-ray diffraction analyses revealed that the nitrogen atoms of cyclen ring combined two protons to form a cation with two positive charges. The protonated DOTAM- n -butyl had strong extraction ability and good selectivity for ReO 4 − . It was extracted by means of the substitution of one ReO 4 − for one NO 3 − in the 1:2 complex of DOTAM- n -butyl with HNO 3 . The solvent extraction and X-ray crystallography demonstrated an anion-exchange extraction model. Meanwhile, X-ray crystal structure analyses of ligand complexes with HReO 4 or HNO 3 also indicated that ReO 4 − or NO 3 − ions were located in the gap between the upper and lower protonated ligands through multiple hydrogen bonds and electrostatic interactions.
研究领域:
化学
·
放射化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）