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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 895-903页

作者：韩宗盈 DONG Hui DING Guoyang ZHANG Jiale SONG Xiufang College of Energy Storage Technology Shandong University of Science and TechnologyQingdao 266590China College of Chemical and Biological Engineering Shandong University of Science and TechnologyQingdao 266590China

The lignite-derived carbon from self-protection pyrolysis was employed to balance the fracturing and cold-welding of magnesium during ball milling.Particle size analysis indicates that the introduction of lignite-derived carbon can effectively reduce the particle size of Mg while the introduction of graphite does no help.Besides,the effect of lignite-derived carbon on crystallite size reduction of Mg is also better than graphite.A moderate cold-welding phenomenon was observed after ball-milling Mg with the lignite-derived carbon,suggesting less Mg is wasted on the milling vials and balls.Molecular dynamic simulations reveal that the balanced fracturing and cold-welding of magnesium during ball milling is mainly attributed to the special structure of the lignite-derived carbon:graphitized short-range ordered stacking function as dry lubricant and irregular shape/sharp edge function as milling aid.The preliminary findings in current study are expected to offer implications for designing efficient Mg-based hydrogen storage materials.

关键词： magnesium lignite-derived carbon cold-welding ball milling molecular dynamic

ball milling pretreatment of corn straw and Pediococcus acidilactici fermentation for non‑ruminant diet

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Systems Microbiology and Biomanufacturing 2022年第2期2卷 355-360页

作者： Dianhui Wu Wenzhe Li Beibei Chu Lulu Wang Xiaomin Li Guolin Cai Jian Lu The Key Laboratory of Industrial Biotechnology Ministry of EducationJiangnan University1800 Lihu RoadWuxi 214122People’s Republic of China National Engineering Laboratory for Cereal Fermentation Technology Jiangnan UniversityNo.1800 Lihu RoadWuxi 214122JiangsuPeople’s Republic of China Jiangsu Provincial Research Center for Bioactive Product Processing Technology Jiangnan University1800 Lihu RoadWuxi 214122People’s Republic of China School of Biotechnology Jiangnan University1800 Lihu RoadWuxi 214122People’s Republic of China Charoen Pokphan Food Research and Development Co. LtdModern Agricultural ParkCixi 315300People’s Republic of China

A new strategy was proposed to improve the utilization rate of corn straw by making non-ruminant feed products.The corn straw was ball milled,and the crushed straw was subjected to solid-state fermentation.After ball milling,the particle size of corn straw decreased signifcantly from 4.85±0.07 cm to 10–100μm,the content of neutral detergent fber and acid detergent fber decreased by 1.3%and 3.5%,respectively,and the total soluble sugar content increased by 16.2 mg/g.At the same time,the straw treated by ball milling as substrate could promote the rapid growth of Pediococcus acidilactici R30,the increase of organic acid production and further improvement of other nutrients during solid-state fermentation.In conclusion,the fermented straw products after ball milling could signifcantly improve the performance of pig feed in terms of digestibility and nutritional value,and better meet the feed needs of non-ruminant animals while saving resources.

关键词： Corn straw ball milling Solid-state fermentation Non-ruminant diet Probiotics

Synthesis of Nitrogen-doped Carbon Supported Cerium Single Atom Catalyst by ball milling for Selective Oxidation of Ethylbenzene

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Chemical Research in Chinese Universities 2022年第5期38卷 1258-1262页

作者： ZHANG Xingcong ZHONG Yunzhu CHEN Hongyu CHENG Yujie SUN Qingdi ZHANG Hao HE Qian ZHANG Ying GUO Guanghui HE Xiaohui JI Hongbing Fine Chemical Industry Research Institute School of ChemistrySun Yat-sen UniversityGuangzhou 510275P.R.China Huizhou Research Institute of Sun Yat-sen University Huizhou 516216P.R.China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516000P.R.China

Through screening Ce precursors and pyrolysis temperatures[Ce(acac)3 as Ce precursors and pyrolysis at 900°C],zeolitic imidazolate framework-8(ZIF-8)derived nitrogen-doped carbon supported cerium single atom catalyst(Ce_(1)/NC)is successfully prepared by ball milling method.The Ce_(1)/NC catalyst exhibits exceptional catalytic performance in the selective oxidation of saturated C―H bonds in aromatic compounds,e.g.,91%conversion and 99%selelctivity can be achieved in the oxidation of ethylbenzene to acetophenone under mild reaction conditions.

关键词： Single atom catalyst ball milling ZIF-8 Ethylbenzene oxidation

Improving hydrogen storage thermodynamics and kinetics of Ce-Mg-Ni-based alloy by mechanical milling with TiF_(3)

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Journal of Magnesium and Alloys 2024年第4期12卷 1593-1607页

作者： Hongwei Shang Wei Zhang Xin Wei Yaqin Li Zeming Yuan Jun Li Yanghuan Zhang School of Mechanical and Electrical Engineering Chuzhou UniversityChuzhou 239000China Department of Functional Material Research Central Iron and Steel Research InstituteNo.76 Xueyuannan RoadHaidian DistrictBeijing 100081China Key Laboratory of Integrated Exploitation of Bayan-Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010China China Rare Earth New Material(Weishan)Co. Ltd.Jining 277600China

Mg-based hydrides are too stable and the kinetics of hydrogen absorption and desorption is not satisfactory.An efficient way to improve these shortcomings is to employ reactive ball milling to synthesize the nanocomposite materials of Mg and additives.In this experiment,TiF_(3)was selected as an additive,and the mechanical milling method was employed to prepare the experimental alloys.The alloys used in this experiment were the as-cast Ce_(5)Mg_(85)Ni_(10),as-milled Ce_(5)Mg_(85)Ni_(10)and Ce_(5)Mg_(85)Ni_(10)+3 wt.%TiF3.The phase transformation,structural evolution,isothermal and non-isothermal hydrogenation and dehydrogenation performances of the alloys were inspected by XRD,SEM,TEM,Sievert apparatus,DSC and TGA.It revealed that nanocrystalline appeared in the as-milled samples.Compared with the as-cast alloy,ball milling made the particle dimension and grain size decrease dramatically and the defect density increase significantly.The addition of TiF_(3)made the surface of ball milling alloy particles markedly coarser and more irregular.ball milling and adding TiF_(3)distinctly improved the activation and kinetics of the alloys.Moreover,ball milling along with TiF_(3)can decrease the onset dehydrogenation temperature of Mg-based hydrides and slightly ameliorate their thermodynamics.

关键词： Mg-based hydrides TiF_(3) ball milling Thermodynamics Kinetics

ball milling promoted direct liquefaction of lignocellulosic biomass in supercritical ethanol

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Frontiers of Chemical Science and Engineering 2020年第4期14卷 605-613页

作者： Chunyan Yang Xiaoliang Yuan Xueting Wang Kejing Wu Yingying Liu Changjun Liu Houfang Lu Bin Liang School of Chemical Engineering Sichuan UniversityChengdu 610065China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610207China

In the present work,ball milling was applied for the pretreatment of lignocellulose to obtain high conversion and bio-oil yield in supercritical ethanol.ball milling substantially decreased the crystallinity and particle size of lignocellulose,thereby improving its accessibility in ethanol solvent.An increased bio-oil yield of 59.2%was obtained for the ball milled camphor-wood sawdust at 300℃,compared with 39.6%for the original lignocellulose.Decreased crystallinity signifi-cantly benefited the conversion of the cellulose component from 60.8%to 91.7%,and decreased particle size was beneficial for the conversion of all components.The obtained bio-oil had a high phenolic content,as analyzed by gas chromatography-mass spectrometry.Methoxylation and retro-aldol condensation were observed during alcoholysis,and the reaction pathways of lignocellulose in supercritical ethanol were attributed to the action of free radicals.

关键词： ball milling lignocellulose superitial etha-nol liquefaction bio-oil

Mechanochemical decomposition of pentachlorophenol by ball milling

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Journal of Environmental Sciences 2009年第12期21卷 1761-1768页

作者： WEI Yinglei, YAN Jianhua, LU Shengyong, LI XiaodongState Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China. State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

The mechanochemical dechlorination of pentachlorophenol （PCP） was studied using CaO and SiO2 powder as additives. The effects of the milling time and additives on the dechlorination rate were investigated. The resulting product was characterized by X-ray diffraction （XRD）, Fourier transform infrared spectra （FT-IR）, thermogravimetric analysis （TG） and ion chromatography （IC）. It is found that grinding operation could dechlorinate PCP, with the formation of inorganic chloride and amorphous carbon. The addition of quartz to the grinding mixture facilitated dechlorination. On the basis of the experimental results, the decomposition mechanism was proposed. Decomposition predominantly proceeds through rupture of C-Cl bond in PCP molecule, followed by the formation of inorganic chlorides.

关键词： ball milling dechlorination mechanochemical pentachlorophenol

Graphitic carbon nitride/biochar composite synthesized by a facile ball-milling method for the adsorption and photocatalytic degradation of enrofloxacin

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Journal of Environmental Sciences 2021年第5期33卷 93-107页

作者： Yao Xiao Honghong Lyu Chengliang Yang Beibei Zhao Lan Wang Jingchun Tang School of Energy and Environmental Engineering Hebei University of TechnologyTianjin 300401China School of Civil and Transportation Engineering Hebei University of TechnologyTianjin 300401China Key Laboratory of Pollution Processes and Environmental Criteria(Ministry of Education) Tianjin Engineering Center of Environmental Diagnosis and Contamination RemediationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China BCIG Environmental Remediation Co. LtdTianjin 300042China

In order to enhance the removal performance of graphitic carbon nitride(g-C_(3)N_(4)) on organic pollutant, a simultaneous process of adsorption and photocatalysis was achieved via the compounding of biochar and g-C_(3)N_(4). In this study, g-C_(3)N_(4) was obtained by a condensation reaction of melamine at 550 °C. Then the g-C_(3)N_(4)/biochar composites were synthesized by ball milling biochar and g-C_(3)N_(4) together, which was considered as a simple, economical, and green strategy. The characterization of resulting g-C_(3)N_(4)/biochar suggested that biochar and g-C_(3)N_(4) achieved effective linkage. The adsorption and photocatalytic performance of the composites were evaluated with enrofloxacin(EFA) as a model pollutant. The result showed that all the g-C_(3)N_(4)/biochar composites displayed higher adsorption and photocatalytic performance to EFA than that of pure g-C_(3)N_(4). The 50% g-C_(3)N_(4)/biochar performed best and removed 45.2% and 81.1% of EFA(10 mg/L) under darkness and light with a dosage of 1 mg/mL, while g-C_(3)N_(4) were 19.0% and 27.3%, respectively. Besides, 50% g-C_(3)N_(4)/biochar showed the highest total organic carbon(TOC) removal efficiency(65.9%). Radical trapping experiments suggested that superoxide radical( ·O_(2)^(-)) and hole(h~+) were the main active species in the photocatalytic process. After 4 cycles, the composite still exhibited activity for catalytic removal of EFA.

关键词： Biochar g-C_(3)N_(4) ball milling Adsorption Photocatalysis

Removal of hexavalent chromium from contaminated waters by ultrasound-assisted aqueous solution ball milling

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Journal of Environmental Sciences 2017年第2期29卷 276-283页

作者： Lin Chen Zhenhua Chen Ding Chen Wei Xiong College of Materials Science and Engineering Hunan UniversityChangsha 410082China

Batch mode experiments were conducted to study the removal of hexavalent chromium（Cr（Ⅵ）） from aqueous solutions using ultrasound-assisted aqueous solution ball milling.The results show that the reduction rate of Cr（Ⅵ） by ultrasound-assisted aqueous solution ball milling was significantly faster than that by ball milling or ultrasound treatment alone,and an initial Cr（Ⅵ） concentration of 166 mg/L could be decreased to 0.35 mg/L at 120 min.The decisive factors, including initial concentration of Cr（Ⅵ）, p H value, ultrasonic frequency and filling gas, were studied. It was found that the optimal ultrasonic frequency for ultrasound-assisted aqueous solution ball milling device was 20 k Hz, and the rate of Cr（Ⅵ）reduction as a function of filling gas followed the order： Ar 〉 air 〉 N2〉 O2. Samples were characterized by X-ray diffraction, fluorescence measurements, atomic absorption and the diphenylcarbazide colorimetric method. The Cr（Ⅵ） transformed into a precipitate that could be removed from the contaminated water, after which the water could be reused.

关键词： Cr（VI） Ultrasound wave ball milling Hydroxyl radicals

Optimization of thermoelectric properties of n-type Bi_2(Te,Se)_3 with optimizing ball milling time

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Rare Metals 2018年第4期37卷 351-359页

作者： Ji-Hee Son Min-Wook Oh Bong-Seo Kim Su-Dong Park Thermoelectric Conversion Research Center Korea Electrotechnology Research Institute Department of Materials Science and Engineering Hanbat National University

The thermoelectric properties at elevated temperature were investigated for n-type Bi2（Te,Se）3 which is obtained from ball milling processed powder with various milling times. Electrical properties such as electrical resistivity and Seebeck coefficient are clearly dependent on milling time, in which the carrier concentration is attributed to the change of the electrical properties. The concentrations of the defects are also varied with the ball milling time, which is the origin of the carrier concentration variation. Even though finer grain sizes are obtained after the long ball milling time, the temperature dependence of the thermal conductivity is not solely understood with the grain size, whereas the electrical contribution to the thermal conductivity should be also considered. The highest figure of merit value of ZT = 0.83 is achieved at 373 K for the optimized samples, in which ball milling time is 10 h. The obtained ZT value is 48% improvement over that of the 0.5-h sample at 373 K.

关键词： Thermoelectric properties ball milling Bi2Te3 Seebeck coefficient Grain size Thermalconductivity

A comparative study on nano La_2O_3 suspension treated by ultrasonic and ball milling

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Journal of Rare Earths 2012年第11期30卷 1116-1122页

作者：江世好黎向锋左敦稳王宏宇柳振平许瑞华 College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology Nanjing University of Aeronautics and Astronautics School of Mechanical Engineering Jiangsu University

This paper presented a scientific study of the effects of four dispersion methods on the dispersion capability of nano La2O3 suspensions, which are ball milling, ultrasonic, ultrasonic followed by ball milling and ball milling followed by ultrasonic. For the purposes of com- paring their dispersion capability, sedimentation test, Zeta-potential measurement test, particles size measurement test and transmission electron microscopy （TEM） test were carried out. Suspension ability coefficient was also defined with expectation to estimate the stability of nano La2O3 suspension through granularity size, and their relationship curve was worked out. The results showed that ultrasonic followed by ball milling enjoyed an excellent capability of dispersion for nano La2O3 suspension. Its mechanism was discussed, and breakage models of nano La2O3 particles were developed. The study results indicated that ultrasonic followed by ball milling could break through both the limits of ultrasonic dispersion size range and thermo-effect, and thus was able to overcome the problem of the secondary aggregation of nanoparticles. Moreover, aggregations could be further de-agglomerated. As a result, dispersion capability of nano La2O3 suspension could be improved more greatly by ultrasonic followed by ball milling. And its suspension stability was the best with the highest suspension ability coefficient of the nanoparticles. It was found in the experiment that there was almost no obvious phenomenon of stratification for the suspension with a little sediment after being deposited for 8 d.

关键词： nano La2O3 suspension ultrasonic ball milling rare earths rare earths