CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 35
·9087-9093
·
IF 5.236
Yongyang Zhu,Hao Zhong,Hui Wang,Liuzhang Ouyang,Jiangwen Liu,Zhenguo Huang,Min Zhu
Graphical A cost-effective way to produce NaBH 4 with high yield by ball milling hydrated borax (Na 2 B 4 O 7 ⋅ 10H 2 O) with cheap Al or Al 88 Si 12 at ambient condition is presented. An effective strategy was developed to facilitate mass transfer during the reaction by introducing NaH to enable the formation of loose NaAlO 2 instead of dense Al 2 O 3 on Al surface, and by using Si as a milling additive that prevents agglomeration and also breaks up passivation layers. A significant obstacle in the large-scale applications of sodium borohydride (NaBH 4 ) for hydrogen storage is its high cost. Herein, we report a new method to synthesize NaBH 4 by ball milling hydrated sodium tetraborate (Na 2 B 4 O 7 ⋅ 10H 2 O) with low-cost Al or Al 88 Si 12 , instead of Na, Mg or Ca. An effective strategy is developed to facilitate mass transfer during the reaction by introducing NaH to enable the formation of NaAlO 2 instead of dense Al 2 O 3 on Al surface, and by using Si as a milling additive to prevent agglomeration and also break up passivation layers. Another advantage of this process is that hydrogen in Na 2 B 4 O 7 ⋅ 10H 2 O serves as a hydrogen source for NaBH 4 generation. Considering the low cost of the starting materials and simplicity in operation, our studies demonstrate the potential of producing NaBH 4 in a more economical way than the commercial process.
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Songfeng E,Yuan Wang,Yuanming Wang,Jiaming Yang,Junli Ma,Kaiyue Huang,Zhangzi Li,Zhaoqing Lu,Lejia Wang
We discovered that incorporating the Ca 2+ into sodium alginate (SA) solution as ball-milling medium of hexagonal boron nitride ( h -BN) could increase the lateral size of the exfoliated h -BN nanosheets (BNNSs) at least twice those of pure SA solution obtained, which can be owing to the Ca 2+ −induced crosslinking of SA and enhancement of interfacial adhesion forces between SA and h -BN that not only boost the impacting resistance to milling balls but also the exfoliation energy to h -BN. Based on the crucial role of Ca 2+ in h -BN exfoliation, the large-area and small-thickness BNNSs are produced simultaneously with the increased milling speed and Ca 2+ concentration, which can be assembled into highly compact and horizontal oriented structures with aramid nanofibers (ANFs) due to the favorable compatibility, dispersity, and interfacial binding force. This kind of compact and ordered structure enables ANF/BNNS film with high thermal conductivity (TC) since the connective and high-efficiency heat conduction paths, of which the highest TC is 27.57 W⋅m −1 ⋅K -1 . Compared with soft and molecular SA chains, the ANFs show an incredible ability to guide the horizontal orientation of BNNSs for the superior TCs of their composites.
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Jianhui Su,Yan Liu,Xiujing Peng,Guoxin Sun,Xuchuan Jiang
Due to the high activation energy barrier and the sporadic nature of nucleation, the temperature required for the transition from cubic dense γ-Al 2 O 3 to tripartite α-Al 2 O 3 is as high as 1100–1200 °C. In this work, a two-step strategy was employed to reduce the phase transformation temperature, and prepare α-Al 2 O 3 particles with good dispersion. As the first step, 10 nm sheet γ-Al 2 O 3 was obtained by ammonium aluminum carbonate (AACH) decomposition, which was more favorable to the crystal transformation in the next ball-milling processing. In the second step, γ-Al 2 O 3 powder with partial α-Al 2 O 3 produced in situ by ball-milling γ-Al 2 O 3 was calcined, and α-Al 2 O 3 nanoparticles were obtained at just 850 °C. The content of the α-Al 2 O 3 is determined by the Rietveld Refine method. The relationship between ball-milling time and α-Al 2 O 3 content was clarified, and the effect of α-Al 2 O 3 content on the transformation temperature and morphology of γ-Al 2 O 3 was discussed. The results showed that the α-Al 2 O 3 content rises with the increase of ball milling time, and spherical α-Al 2 O 3 nanoparticles can be obtained when the α-Al 2 O 3 content is 5 %. The addition of α-Al 2 O 3 seeds reduces the phase transition temperature but agglomeration exists. Our proposed two-step low-temperature calcination strategy is an important method for the preparation of alumina nanoparticles
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 9
·期 2
·370-378
·
IF 6.569
Yongyang Zhu,Hao Zhong,Liuzhang Ouyang,Jiangwen Liu,Hui Wang,Huaiyu Shao,Min Zhu
In this work, we reported an energy-saving and cost-efficient process for the (re)generation of NaBH4 by ball milling hydrated borax (Na2B4O7·10H2O) with a Mg–Al alloy under ambient conditions. The introduction of abundant and readily available Al can increase air stability of the reducing agent. A high yield up to 85.2% could be achieved by using Mg17Al12 because of its hardness and brittleness.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 2
·317
·
IF 3.4
Yan Zhang,Tianyi Sun,Dashuai Zhang,Chen Li,Jinrui Liu,Bangsen Li,Zaifeng Shi
The fact that the use of a large number of plastic products has brought serious pollution to the environment has always been the focus of global attention. The development of photocatalytic degradable plastics is one of the effective ways to solve the problem of “white pollution”. In this work, La3+modified TiO2nanoparticles were prepared by ball milling and characterized. La3+/TiO2was mixed with Polyvinyl chloride (PVC) plastic to make a photodegradable composite film, and the photodegradation performance and mechanical properties of films were evaluated. The photodegradable films were characterized by infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), and scanning electron microscopy (SEM). After 30 h UV irradiation, the weight loss rate of the PVC was only 2.12%, while that of the TiO2/PVC reached 8.94%. The accelerating of the degradation rate was due to the mixing of TiO2into PVC. As for the La3+/TiO2/PVC composite film, when the mass percentage of La3+/TiO2was 1.5%, the weight loss rate of La3+/TiO2/PVC sample reached a maximum of 17.78%, which was eight times the degradation rate of PVC and two times the degradation rate of TiO2/PVC. The La3+/TiO2/PVC film showed good photodegradability. La is a transition metal element with a special 4f electronic structure. The reaction mechanism of photodegradation of PVC by the interaction of La3+and TiO2were discussed.Keywords:La3+modified TiO2;La3+/TiO2/PVC composite film;ball milling method;photodegradation
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Jinyi Zhao,Xiaochen Jin,Mengxing Yan,Chen Huang,Qiang Yong,Zhe Ling
Nanocellulose (NC) derived from lignocellulosic biomass has served as a promising material for functional applications. However, conventional chemical and mechanical processes for NC fabrication are environmentally harmful and energy intensive and may inevitably cause component loss. Herein, a green dual-enzymatic treatment assisted by ball milling strategy was proposed for bamboo pulp to produce NC with varied morphologies and supramolecular structures, as well as the coproduction of monosaccharides and xylooligosaccharides (XOS) with reduced enzyme loading and treatment time. Endoglucanase (EG) and xylanase at various loading ratios were used for adjusting the physical–chemical structures of NC. Mechanistic studies showed the accomplishment of nanofibrillation under shorter ball milling time via retention of hemicelluloses, while longer ball milling time intensified fibril deconstruction, thus exposing cellulose hydrophobic surfaces favorable for subsequent enzymatic hydrolysis. The method was subsequently applied to bamboo holocellulose and microcrystalline cellulose (MCC)/xylan models, which obtained the highest yields of 23.2% glucose, 24.4% XOS, and 21.5% NC. Bamboo holocellulose produced NC with a high aspect ratio of up to 55.1, while MCC produced spherical NC with cellulose II allomorph. The proposed ball-milling-assisted dual-enzymatic treatment can provide theoretical guidance for high-value conversion and more complete utilization of bamboo polysaccharides.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Kangkang Bai,Jin-Chen Fan,Peng-Hui Shi,Yu-Lin Min,Qun-Jie Xu
Oxygen evolution reaction (OER) electrocatalysis plays an important role in clean and renewable energy conversion. Designing high-performance OER electrocatalyst is key to the high electrochemical activity. Noble-metal-free electrochemical OER electrocatalysts become the major trend. Herein, we report a facile ball-milling method to prepare red phosphorus (BP)-black phosphorus (BP)/expended graphite (EG) toward OER electrocatalysis. By virtue of the high temperature and shearing force generated in the ball-milling process, a portion of red phosphorus can be in-situ transferred into chemical active BP and formed the RP-BP heterostructure . Meantime, the EG flakes are cut and exfoliated into defect-rich graphene nanosheets and thin EG flakes, reacting with the RP-BP heterostructure through P–C and P– O –C bonds. The hybridization of RP-BP and EG improves the electroconductivity and facilitate more active electrocatalytic sites toward OER. The results demonstrate that RP-BP/EG heterostructure shows good OER performance with a low overpotential of 328 mV vs. RHE) at a current density of 10 mA cm −2 , lower than commercial IrO 2 (330 mV vs. RHE , 10 mA cm −2 ). A very small Tafel slope of 58 mV·dec −1 indicates the high electron transmission on the RP-BP/EG catalyst. The stable structure of RP-BP/EG provides the long-term durability of the RP-BP/EG catalysts in OER.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Miaojun Huang,Hao Zhong,Liuzhang Ouyang,Chenghong Peng,Xiaoke Zhu,Weiheng Zhu,Fang Fang,Min Zhu
The application of NaBH 4 hydrolysis to hydrogen generation is currently obstructed by its regeneration. Finding a simple and low cost method to regenerate its hydrolysis byproduct is therefore important. Herein, the regeneration of NaBH 4 is obtained by reacting its direct hydrolysis byproduct, NaBO 2 ·2H 2 O, with a mixture of Mg and Mg 2 Si by ball milling. In this reaction, the reduced agents are only metal and intermetallic compounds , thus hydrogen in the regenerated NaBH 4 (H δ− ) derives solely from NaBO 2 ·2H 2 O (H δ+ ). The introduction of Mg 2 Si increases the NaBH 4 regeneration yield to 86%, which is the highest regeneration yield reported for NaBH 4 until now. The reaction mechanism was also clarified for the first time.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Shuzhen Zhou,Jingyi Hao,Mengjie Zhou,Xiaoguang Qiao,Xinchang Pang
The combination of piezoelectric material and ball milling leads to new frontiers in catalysis research. Here we used piezoelectric BaTiO 3 nanoparticles as the additive for the degradation of dye pollutant in solid state in ball milling process. With the assistant of ppm level CuBr 2 and H 2 O 2 , high degradation conversion (> 99%) of dyes can be achieved in short time (10 min). BaTiO 3 nanoparticles became temporarily highly polarized particles during BM process and generated electron-hole. These particles exhibited strong reducing properties and reduced Cu(II) into the active Cu(I) species which can catalyze H 2 O 2 to generate highly active ·O 2– to enhance the dye degradation. In addition to the general applicability for different dyes and larger scales, this BaTiO 3 assist BM process was deduced to be a promising powerful platform for organic pollutant treatment in solid states.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 46
·8027-8032
·
IF 3.545
Fenghua Chen,Jie Fan,Xiuzhi Chen,Yanping Li,Chengfeng Liang,Shizhao Ren,Rongrong Xue
Polymorph control of 5-fluorouracil (5-FU) was achieved by ball milling. Form II was synthesized through one-step neat grinding of raw 5-FU (RFU), and Form III (a new polymorph) was obtained by neat grinding RFU twice. Forms II and III of 5-FU were prepared separately through ball milling with different amounts of ethanol as an additive at the same period without influencing each other.
研究领域:
药物化学
·
制药工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Ruobing Zheng,Lili Zhu,Changdian Li,Ziqiang Wu,Yanan Huang,Jie Yang,Renhuai Wei,Xuebin Zhu,Yuping Sun
Misfit-layered Ca 3 Co 4 O 9 was investigated as oxygen evolution reaction catalyst for electrochemical water splitting. Oxygen vacancies can be effectively induced by ball milling as detected by electronic paramagnetic resonance and X-ray photoelectron spectrometer measurements. The electrochemical performance was investigated for the Ca 3 Co 4 O 9 catalysts with different ball milling times. The results show that the sample with the ball milling time of 24 h possesses the best performance due to the induced oxygen vacancies as well as the enhanced specific surface area. This work will provide an effective route to improve the electrochemical oxygen evolution reaction performance of the misfit-layered cobaltates.
研究领域:
材料科学
·
电催化
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Ying Chu,Peng Wang,Yihong Ding,Jie Lin,Xinxin Zhu,Shiqiang Zhao,Huile Jin,Tianbiao Zeng
Antimony (Sb) has been considered a promising anode for sodium-ion batteries (SIBs) owing to its high theoretical capacity (660 mA h g–1) and low redox voltage (0.2–0.9 V vs Na+/Na). However, the capacity degradation caused by the volumetric variation during battery discharge/charge hinders the practical application. Herein, guided by the DFT calculation, Sb/Fe2S3 was fabricated by annealing Fe and Sb2S3 mixed powder. Next, Sb/Fe2S3 was blended with 15 wt % graphite by ball milling, yielding nano-Sb/Fe2S3 anchored on an exfoliated graphite composite (denoted as Sb/Fe2S3-15%). When applied as an anode of SIBs, Sb/Fe2S3-15% delivered reversible capacities of 565, 542, 467, 366, 285, and 236 mA h g–1 at current rates of 1, 2, 4, 6, 8, and 10 A g–1, respectively, surpassing most of the Sb-based anodes. The co-existence of highly conductive Fe2S3 and Sb minimizes the polarization of the anode. Our experiments proved that the Sb and Fe2S3 phases were reversible during discharge/charge cycling, and the exfoliated graphite can accelerate the Na+ diffusion and e– conduction. The proposed synthesis method of this work can also be applicable to synthesize various antimony/transition metal sulfide heterostructures (Sb/M1–xS), which may be applied in a series of fields.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）