JOURNAL OF ORGANOMETALLIC CHEMISTRY
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2018
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IF 1.946
Linna Sha,Peng Gao,Xiaobo Li,Xuefeng Bai
In this work, amorphous CoB has been uniformly coated on C 60 surfaces through a simple ball milling process. Accordingly their XRD , SEM and TEM measurements clarify their related composite structures. Especially, a C-B chemical bond has been found through its XPS measurement, which enhanced the composite's stability and electrochemical activity. And the following electrochemical experimental results demonstrated that the as-obtained C 60 /CoB composite had considerably high storage capacities of 602 mA h/g, which were much higher than those of individual C 60 and CoB. Furthermore their hydrogen storage processes and the mechanism have also been investigated.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 17
·10723-10728
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IF 10.733
Hao Zhong,Liuzhang Ouyang,Meiqin Zeng,Jiangwen Liu,Hui Wang,Huaiyu Shao,Michael Felderhoff,Min Zhu
The regeneration of sodium borohydride (NaBH4) is crucial to form a closed cycle after it either supplies hydrogen energy via a hydrolysis process or provides energy through electron transfer at the anode of direct borohydride fuel cells (DBFCs). In both of these cases, the spent fuels are NaB(OH)4 from NaBO2 aqueous solution. However, the current regeneration process from (NaB(OH)4)·xH2O to form NaBH4 by reduction reaction and calcination at high temperature with metal hydrides as reducing agents is very expensive. In this work, we developed a simple regeneration process via ball milling with Mg–Al alloys as the reducing agent for NaB(OH)4 under an argon atmosphere. Under optimized conditions, a high yield of about 72% of NaBH4 could be obtained. Mechanistic study showed that all the hydrogen atoms from NaB(OH)4 remain in NaBH4 and no additional hydrogen sources are needed for the reduction process. The inexpensive Mg–Al alloy works as a reducing agent transforming the H+ to H− in NaBH4. This approach demonstrates a ∼20-fold cost reduction compared with the method using metal hydrides. This opens the door to the commercial implementation of simple ball milling processes for the regeneration of spent NaBH4 from NaB(OH)4 with cheap reducing agents.
研究领域:
化学工程
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能源材料科学
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产品关联
DOI
高影响因子
ChemElectroChem
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2019
·Vol. 6
·期 17
·4689-4695
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IF 3.975
Yuqing Gao,Qiang Ru,Yang Liu,Shikun Cheng,Li Wei,Francis Chi-Chung Ling,Fuming Chen,Xianhua Hou
Graphical Seeing red : Benefitting from the controllable interplanar spacing of MoS 2 and the high theoretical capacity provided by red phosphorus (RP) particles, the mosaic RP/MoS 2 (2 : 1) hybrid synthesized by a simple ball-milling approach delivers impressive electrochemical performance for potassium-ion batteries (KIBs). This study provides a new insight into developing the rational design of novel anode alternatives for KIBs. Low-cost, non-toxic, and abundant red phosphorus (RP) with high gravimetric discharge/charge capacity has been recognized as a promising anode candidate for potassium-ion batteries (KIBs). However, the large volumetric change, severe agglomeration, and rapid capacity attenuation during discharge/charge cycles are major obstacles for practical applications in potassium-ion storage. In order to eliminate such intrinsic deficiencies, a mosaic RP/MoS 2 hybrid is designed and prepared by using a simple ball-milling method and subsequently used as an anode for KIBs. The hybrid with a certain ratio of 2 : 1 can achieve a sustainable K + storage capability (246.6/239.6 mAh g −1 for 100 cycles at 50 mA g −1 ), considerable long-cycle performance (120.5/118.0 mAh g −1 at 1000 mA g −1 after 500 cycles), and good rate capability. The cycling performance is attributed to a pseudocapacitive effect, controllable interlayer spacing of MoS 2 , and enhanced conductivity. In view of the scalable synthesis process and considerable cycling durability, the RP/MoS 2 hybrid may shed light on the rational design of novel anode alternatives for KIBs.
研究领域:
材料科学
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能源存储
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纳米技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Lei Wang,Decao Ma,Chun Guo,Xin Jiang,Mingliang Li,Tingting Xu,Jinpeng Zhu,Bingbing Fan,Wen Liu,Gang Shao,Hongliang Xu,Hailong Wang,Rui Zhang,Hongxia Lu
All-inorganic halide perovskite nanocrystals (NCs) are generally prepared by liquid phase method with the help of volatile organic solvents, inert gas protection and complex organometallic precursors. Herein, a simple, efficient and green method based on all-solid-state mechanochemical synthesis is proposed to prepare CsPbBr 3 NCs. NCs with excellent performance can be prepared by grinding raw materials CsBr and PbBr 2 through high energy ball milling, and prepared NCs show good stability in ethanol and living conditions. Interestingly, CsPbBr 3 NCs prepared by ball milling have a sudden increase in their fluorescence intensity dispersed in water. After soaking for 8 h, CsPbBr 3 NCs have been almost entirely transformed into CsPb 2 Br 5 NCs. The fluorescence intensity of samples is 80 times of that before soaking, and absolute PL quantum yield (PLQY) of samples increases significantly by up to 92%. These results provide a strong evidence for the current debate about whether CsPb 2 Br 5 emits light and propose a deeper understanding about structural transition from orthorhombic CsPbBr 3 to tetragonal CsPb 2 Br 5 , which is of great significance to the application of CsPb 2 Br 5 in optoelectronic devices. This will provide a new idea for the synthesis and transformation of halide perovskites.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
Materials
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2021
·Vol. 14
·期 24
·7889
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IF 3.623
Lixiang Zhu,Meishuai Zou,Xiaodong Zhang,Lichen Zhang,Xiaoxuan Wang,Tinglu Song,Shuo Wang,Xiaodong Li
The main problem for the application of hydrogen generated via hydrolysis of metal alloys is the low hydrogen generation rate (HGR). In this paper, active Al alloys were prepared using a new coupled method-melting-mechanical crushing-mechanical ball milling method to enhance the HGR at room temperature. This method contains three steps, including the melting of Al, Ga, In, and Sn ingots with low melting alloy blocks and casting into plates, then crushing alloy plate into powders and ball milling with chloride salts such as NiCl2and CoCl2were added during the ball milling process. The microstructure and phase compositions of Al alloys and reaction products were investigated via X-ray diffraction and scanning electron microscopy with energy dispersed X-ray spectroscopy. The low-melting-point Ga-In -Sn (GIS) phases contain a large amount of Al can act as a transmission medium for Al, which improves the diffusion of Al to Al/H2O reaction sites. Finer GIS phases after ball milling can further enhance the diffusion of Al and thus enhance the activity of Al alloy. The hydrogen generation performance through hydrolysis of water with Al at room temperature was investigated. The results show that the H2generation performance of the Al-low-melting point alloy composite powder is significantly higher than the results reported to date. The highest H2generation rate and H2conversion efficiency can reach 5337 mL·min−1·g−1for the hydrolysis of water with 1 g active alloy.Keywords:aluminum alloys;melting-crushing-ball milling;hydrogen generation performance;hydrogen storage
研究领域:
材料科学
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能源工程
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产品关联
DOI
PubMed
高影响因子
ChemElectroChem
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2016
·Vol. 4
·期 1
·115-121
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IF 3.506
Peiming Xin,Bo Jin,Huan Li,Xingyou Lang,Chuncheng Yang,Wang Gao,Yongfu Zhu,Wenqi Zhang,Shixue Dou,Qing Jiang
Graphical To the grindstone : A sulfur–polypyrrole (S-PPy) composite is synthesized by a facile ball-milling route, in which PPy has been prepared through a self-degrading template method. Owing to the interstitial structure of S-PPy and multiple effects of PPy, S-PPy possesses a high discharge capacity, good cycling stability, and good rate performance (see figure; DME=1,2-dimethoxyethane, DOL=1,3-dioxolane). To explore the potential application of lithium–sulfur batteries (LSBs) in the emerging electric vehicle market, sulfur–polypyrrole (S-PPy) is prepared by a facile ball-milling route, in which polypyrrole is synthesized by using ferric chloride as an oxidant in a self-degrading template method. Compared with sulfur, S-PPy possesses a higher discharge capacity, much better cycling stability, and better rate performance. At a current density of 200 mA g −1 , the discharge capacity of S-PPy is maintained at 675 mA h g −1 after 150 cycles, and even at a current density of 1675 mA g −1 , the retained discharge capacity is still 617 mA h g −1 after 100 cycles. The retained discharge capacity of pure sulfur, however, is only 150 mA h g −1 after 150 cycles at a current density of 200 mA g −1 . These results indicate that S-PPy, with its facile, low-cost, and eco-friendly synthesis, could be a potential cathode material for LSBs.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2020
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IF 2.717
Yanglin Zhang,Xi'an Fan,Wentao Hu,Zigui Luo,Zhenjia Yang,Guangqiang Li,Yawei Li
In this paper, Fe soft magnetic composites (SMCs) coated with MnO 2 were prepared successfully by ball milling and following spark plasma sintering. The effect of MnO 2 content on microstructure and magnetic properties for the Fe/MnO 2 SMCs was investigated in detail. The analysis results show that a uniform MnO 2 coating layer can be formed on the surface of the Fe particles via low speed ball milling with agate balls. When the MnO 2 content increases from 0.0 wt% to 10.0 wt%, the thickness of the MnO 2 coating layer exhibits a growth trend. As a consequence, the increased nonmagnetic phase leads to the magnetic dilution, finally resulting in the reduced saturation magnetization and deteriorated coercivity. Moreover, the enhanced resistivity induced by the increased thickness, significantly reduces the generation of the inter-particle eddy current, which leads to more stable permeability and lower total core loss at high frequencies. This study provides a novel insulating coating layer to reduce total core loss and is advantageous for the development of iron-based SMCs.
研究领域:
材料科学
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物理学
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2024
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IF 9.7
Siyu Xu,Haixin Guo,De Li,Hejuan Wu,Mo Qiu,Jirui Yang,Feng Shen
The isomerization of glucose is a crucial step for biomass valorization to downstream chemicals. Herein, highly dispersed MgO doped biochar (BM-0.5@450) was prepared from rice straw via a solvent-free ball milling pretreatment and pyrolysis under nitrogen conditions. The nano-MgO doped biochar demonstrated enhanced conversion of glucose in water at low temperatures. A 31 % yield of fructose was obtained from glucose over BM-0.5@450 at 50 °C with 80.0 % selectivity. At 60 °C for 140 min, BM-0.5@450 achieved a 32.5 % yield of fructose. Compared to catalyst synthesized from conventional impregnation method (IM@450), the BM-0.5@450 catalyst shows much higher fructose yields (32.5 % vs 25.9 %), which can be attributed to smaller crystallite size of MgO (11.32 nm vs 19.58 nm) and homogenous distribution. The mechanism study shows that the activated MgOH + ·OH − group by water facilitated the deprotonation process leading to the formation of key intermediate enediol.
研究领域:
化学工程
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催化材料
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生物质转化
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产品关联
DOI
PubMed
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
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2024
·
IF 2.7
Shiwei Xue,Huiling Ding,Zhenghao Xia,Hengbin Mao,Sibo Zhao,Hailong Wang,Bingbing Fan,Gang Shao,Hongliang Xu,Hongxia Lu
Light Emitting Diodes (LEDs) are the key to new generation displays. New semiconductor electron–hole recombination layer is the key to high-performance LEDs. Although all-inorganic quantum dot (QD) materials have the advantages of wide color gamut and narrow emission peaks, they face issues of toxicity of heavy metal ions and stability of QDs, the synthesis method is highly polluting and difficult to achieve industrial production. Thereby, lead-free all-inorganic phosphor with narrow FWHM needs to be explored. A new synthesis method is required to be investigated. All-inorganic Mn 2+ bromide (Cs 3 MnBr 5 ) is easy to synthesize and has low toxicity and superior luminescent properties. However, most synthesis methods rely on liquid-phase reaction systems and cannot achieve highly efficient synthesis. High-energy ball milling is an efficient method and has enormous potential for industrial production. In this paper, this method is used to synthesize Cs 3 MnBr 5 , and then Cs/Mn ratio, ball milling time, and ligand usage are studied. Furthermore, a new phase transformation of all-inorganic Mn 2+ bromide is discovered, and the mechanism of high-energy ball milling is interpreted combining with phase transformation process. This article brings a new method to synthesis of all-inorganic Mn 2+ bromide, explains the mechanism of ball milling, and expands the phase transformation of all-inorganic Mn 2+ bromide.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
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2015
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IF 4.38
Zhengqiu Yuan,Jinxing Long,Tiejun Wang,Riyang Shu,Qi Zhang,Longlong Ma
Enhancement of the cellulose accessibility is significant for biomass enzymatic hydrolysis. Here, we reported an efficient combined pretreatment for corn straw enzymolysis using ball milling and dilute acid hydrothermal method (a mixture solvent of H 2 O/ethanol/sulfuric acid/hydrogen peroxide liquid). The process intensification effect of ball milling on the pretreatment of the corn straw was studied through the comparative characterization of the physical–chemical properties of the raw and pretreated corn straw using FT-IR, BET, XRD, SEM, and HPLC analysis. The effect of the pretreatment temperature was also investigated. Furthermore, various pretreatment methods were compared as well. Moreover, the pretreatment performance was measured by enzymolysis. The results showed that ball milling had a significant process intensification effect on the corn straw enzymolysis. The glucose concentration was dramatically increased from 0.41 to 13.86 mg mL −1 after the combined treatment of ball milling and hydrothermal. The efficient removal of lignin and hemicellulose and the enlargement of the surface area were considered to be responsible for this significant increase based on the intensive analysis on the main components and the physical–chemical properties of the raw and pretreated corn straw.
研究领域:
生物化学
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生物质能
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2016
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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.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Shuai Liu,Wenjie Tao,Yang Yu,Sandile Fakudze,Chen Wang,Jiaxin Wang,Jiangang Han,Jianqiang Chen
Aiming at enhancing cyclic stability and fast charging performance of lithium-ion batteries (LIBs), a sandwich structured composite with a buffer layer of porous silicon (Si) between the carbon layer and SnO 2 layer (C/Si@SnO 2 ) was developed by using ball milling. The results showed that the Si layer with plenty of mesoporous and cracks was coated successfully and the introduction of Si increased the disordered structure of SnO 2 , including the expansion of interlayer spacing, the emergence of Sn and SiOx indicated the reaction between Si and SnO 2 occurred during the ball milling process, while the generation of Si-O-Sn and Si-O-C bonds formed by Si integration connected the three components with intimate interfaces. Used as an anode for LIBs, the C/Si@SnO 2 electrode performed a favorable discharge capacity (919.21 mAh·g −1 at 0.1 A·g −1 ), the ultra-long cyclability after 1000 and 2000 cycles, impressive rate performance (269.87 mAh·g −1 at 5 A·g −1 ), and fast charging capability accompanying discharge capacity of 805.57 mAh·g −1 at 0.2 A·g −1 and charge capacity of 400.55 mAh·g −1 at 2 A·g −1 . In addition, the electrochemical impedance spectroscopy analysis showed that the graphitic carbon layer and porous Si layer improved the rapid Li + diffusion and transportation, which was beneficial to fast charging in LIBs. Our work provided a facile and green ball milling method to construct porous sandwich structured metal oxide/C composites with the introduction of Si, which can effectively increase the disordered structure of composite and also open up a new scheme of Si materials as an anode in the field of fast charging for LIBs.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）