Advanced Powder Technology最新文献_第9页

Tribocatalytic activity of poled BaCuxTi1-xO3-x nanofibers for degradation of organic dye 抛光 BaCuxTi1-xO3-x 纳米纤维降解有机染料的摩擦催化活性

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-06 DOI: 10.1016/j.apt.2024.104612

{"title":"Tribocatalytic activity of poled BaCuxTi1-xO3-x nanofibers for degradation of organic dye","authors":"","doi":"10.1016/j.apt.2024.104612","DOIUrl":"10.1016/j.apt.2024.104612","url":null,"abstract":"<div>BaCuxTi1-xO3-x (x = 0, 0.01, 0.02, 0.03, 0.04) nanofibers were synthesized via the hydrothermal method and subsequently subjected to poling. The impact of composition on their tribocatalytic performance and the underlying catalytic mechanism were investigated. After 100 min, all poled BaCuxTi1-xO3-x nanofibers exhibited superior tribocatalytic efficiency compared to pure BaTiO3, with BaCu0.02Ti0.98O2.98 poled nanofibers achieving a degradation rate of up to 80 % for RhB solution. This is because the increased conductivity and reduced carrier recombination rate which were caused by a 0.02 Cu doping, smaller grain size and poling effect. Control experiments confirmed that both stirring and the presence of a catalyst are essential prerequisites for tribocatalysis. Furthermore, the universality, selectivity, stability, and main active group <img>O2– of poled BaCuxTi1-xO3-x (x = 0, 0.01, 0.02, 0.03, 0.04) nanofibers were verified. Lastly, although the tribocatalytic efficiency presented in this paper does not match that of piezoelectric catalysis, the latter requires ultrasonic conditions that are challenging to find naturally. As a result, tribocatalysis offers greater potential for practical applications.</div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The distribution of Y2O3 during selective laser melting of IN625/Y2O3 core-shell powders 选择性激光熔融 IN625/Y2O3 核壳粉末过程中 Y2O3 的分布

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-06 DOI: 10.1016/j.apt.2024.104609

{"title":"The distribution of Y2O3 during selective laser melting of IN625/Y2O3 core-shell powders","authors":"","doi":"10.1016/j.apt.2024.104609","DOIUrl":"10.1016/j.apt.2024.104609","url":null,"abstract":"<div>Selective laser melting (SLM) of metal-oxide hybrid powder is currently a cost-effective approach for fabricating oxide-dispersion-strengthened alloys. The distribution behavior of oxide during the SLM process has significant effects on the performance of the final components. In this work, Y2O3 strengthened IN625 superalloys were fabricated by selective laser melting using IN625 powder coated by 1 wt% and 3 wt% Y2O3. The hybrid powder prepared by the resonant mixing method present the good flowability. Due to the high melting point of Y2O3 powder and its harmful effect on the wettability between the melt track and the formed surface, the required laser energy density for successful SLM-fabrication of the hybrid powder should be high. The distribution characteristics of Y2O3 during the SLM process and the corresponding evolution mechanism were analyzed. It was found that severe loss of Y2O3 occurred during SLM process, resulting from Y2O3 slag on the top surface of the built specimen, Y2O3 adhered to spatter particles falling into the recycling powder, and Y2O3 plume blown into the machine filter by the gas flow. The more Y2O3 coated on the metal powder, the more Y2O3 lost during SLM. The molten pool with keyhole mode is favorable to reduce Y2O3 loss compared to the conduction mode.</div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A time-domain nuclear magnetic resonance (TD-NMR) as a tool to characterize affinity between partially hydrophobic silica nanoparticles and ethanol/hexane mixtures 将时域核磁共振（TD-NMR）作为表征部分疏水性二氧化硅纳米颗粒与乙醇/正己烷混合物之间亲和力的工具

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-05 DOI: 10.1016/j.apt.2024.104593

{"title":"A time-domain nuclear magnetic resonance (TD-NMR) as a tool to characterize affinity between partially hydrophobic silica nanoparticles and ethanol/hexane mixtures","authors":"","doi":"10.1016/j.apt.2024.104593","DOIUrl":"10.1016/j.apt.2024.104593","url":null,"abstract":"<div>Affinity between partially hydrophobic silica nanoparticles and organic solvents (ethanol and hexane) as dispersing medium has been characterized with change in the relaxation time obtained by a time-domain nuclear magnetic resonance (TD-NMR). Different chain lengths (denoted as C3, C6, and C12) were utilized as surface modifiers for the particles and the modification ratio was controlled. For ethanol, the longer chain length and higher modification ratio showed the higher affinity while for hexane, vice versa even though a quite poor affinity appeared in whole conditions. We hypothesize that the ethanol molecules could be attracted to residual silanol groups among long-chain length-functional groups. In order to prove, affinity of the partially hydrophobic silica nanoparticles with ethanol/hexane mixture has been investigated. In the range from 60 to 80 vol% of hexane, relaxation time of the C12-modified silica nanoparticles (modification ratio was 1.4 /nm2) quickly decreased. When the residual silanol was additionally modified with C3, the corresponding decrease disappeared. The TD-NMR has an effective tool to detect the change in the surface affinity of the partially hydrophobic nanoparticles even if they showed the same hydrophobicity.</div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141950267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parametric and non-parametric evaluation of conversion of number-based particle size distribution to mass-based distribution 将基于数量的粒度分布转换为基于质量的分布的参数和非参数评估

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-03 DOI: 10.1016/j.apt.2024.104594

{"title":"Parametric and non-parametric evaluation of conversion of number-based particle size distribution to mass-based distribution","authors":"","doi":"10.1016/j.apt.2024.104594","DOIUrl":"10.1016/j.apt.2024.104594","url":null,"abstract":"<div>Interest in applying non-parametric methods to analyze particle size distribution (PSD) is growing. Previous studies have demonstrated the effectiveness of the bootstrap method in evaluating percentile values and confidence intervals for number-based PSD data. In this study, the application of the method to mass-based (volume-based) distribution was extended. The performance of the parametric method, which uses the Hatch-Choate equation for lognormal distribution, was compared with that of the non-parametric method in evaluating mass-based distribution data converted from number-based distribution. The superior performance of the parametric method underscores the importance of prior distribution function knowledge. For non-parametric methods, “real repeat” simulations involving 5000 repetitions of individual samplings were conducted as a reference for the bootstrap method. It was found that there exists a critical sample size, beyond which larger samples are necessary to accurately represent the population through non-parametric analysis. This critical size requires that the maximum size in the dataset exceeds the target size (e.g., the 90th percentile value) for direct evaluation of existing data. When the sample size range surpasses the critical size, bootstrap provides a good approximation to the “real repeat” experiments. Therefore, it is essential to have a diagnostic strategy to determine whether the sample size is sufficiently large for non-parametric analysis. A simple method using multi-scale bootstrap is proposed in this regard.</div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S092188312400270X/pdfft?md5=4c04d30467bc9bafc10635a5e42637e8&pid=1-s2.0-S092188312400270X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141950266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Removal of deep traps in Lu2O3:Tm phosphors via formation of continuous solid solutions with In2O3 enabling widely tailorable bandgap energy 通过与 In2O3 形成连续固溶体消除 Lu2O3:Tm 荧光粉中的深陷阱，实现广泛的可定制带隙能

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-03 DOI: 10.1016/j.apt.2024.104610

{"title":"Removal of deep traps in Lu2O3:Tm phosphors via formation of continuous solid solutions with In2O3 enabling widely tailorable bandgap energy","authors":"","doi":"10.1016/j.apt.2024.104610","DOIUrl":"10.1016/j.apt.2024.104610","url":null,"abstract":"<div>Bandgap engineering has been effectively used to reduce the shallow-trap defects (e.g. antisite defects), but there are still rare reports on the removal of deep-trap defects (e.g. oxygen defects). In this work, our proposed strategy of In3+ substitution for Lu3+ via the formation of continuous (Lu,In)2O3 solid solutions can be used to widely tailored the bandgap energy. These solid solutions prepared from the chemical co-precipitation route presented the rounded morphology and their particle sizes increased at a higher In3+ content. The (Lu,In)2O3:Tm phosphor powders exhibited characteristic Tm3+ emissions arising from its intra‐4f12 multi‐transitions upon UV excitation into strong broad charge transfer bands. The luminescence intensity reached the highest level at 15 at.% In3+ concentration. The In3+ incorporation was found to red-shift the charge transfer bands and shortened the florescence lifetimes. The luminescence quenching was dominated by exchange interaction while the theoretical and experimental quenching concentration of Tm3+ coincided well with each other (both ∼1 at.%). The trap depth in the In3+ free Lu2O3:Tm phosphor was determined to be ∼0.61 eV and these electron traps could be almost fully buried at the In3+ concentration above 5 at.%. Both the (Lu0.99Tm0.01)2O3 and (Lu0.84In0.15Tm0.01)2O3 phosphors exhibited good thermal stability with high thermal-quenching activation energies (∼0.45 eV for the former and ∼0.39 eV for the latter). However, the (Lu0.99Tm0.01)2O3 phosphor presented abnormal thermal quenching effect.</div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel interaction theory for the starch adsorption onto hematite surface 赤铁矿表面淀粉吸附的新型相互作用理论

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-02 DOI: 10.1016/j.apt.2024.104607

{"title":"A novel interaction theory for the starch adsorption onto hematite surface","authors":"","doi":"10.1016/j.apt.2024.104607","DOIUrl":"10.1016/j.apt.2024.104607","url":null,"abstract":"<div>Depressant starch (NS) was generally used in hematite flotation, while the adsorption mechanism of the macromolecular polymer onto mineral surfaces remained in question. In this study, novel detection approaches and computational chemistry methods were introduced to update the widely-accepted acid-base interaction theory. Microflotation tests confirm that the hematite flotation recovery was easily depressed by NS under the acid or alkaline conditions rather than the neutral condition. Zeta potential measurement shows that NS could change the zeta potential of hematite, while the shift amplitude ranked as alkaline > acid > neutral, indicating the most suitable pH range is the alkaline condition. XPS analysis reveals that NS could chemisorbed onto Fe atoms of hematite surface via C-O groups in the whole studied pH range. It was further verified using AFM tests, in which the NS has a stronger interaction force under the alkaline environment. MDS further indicates that the interaction energy between NS and the (001) hematite surface was three times greater than others under alkaline conditions. In general, the interaction force at the interface between the hematite surface and NS was a strong chemical adsorption at the alkaline conditions while there was weak chemisorption and hydrogen bonding under the neutral or acidic conditions.</div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141951479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Inside Front Cover (Aims & Scope, Editors) 封面内页（目标与范围，编辑）

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-01 DOI: 10.1016/S0921-8831(24)00273-5

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Full title (Editorial Board Members) 全称（编辑委员会成员）

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-01 DOI: 10.1016/S0921-8831(24)00274-7

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Performance analysis of vertical stirred mill based on multi-coupling method 基于多耦合方法的立式搅拌磨性能分析

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-07-30 DOI: 10.1016/j.apt.2024.104603

{"title":"Performance analysis of vertical stirred mill based on multi-coupling method","authors":"","doi":"10.1016/j.apt.2024.104603","DOIUrl":"10.1016/j.apt.2024.104603","url":null,"abstract":"<div>To improve vertical mill performance, a vertical stirred mill is used as the research object. Firstly, an electromechanical multi-body dynamic model (EMBD) of the vertical stirred mill is established, followed by the establishment of a discrete element method (DEM) analysis model of the grinding media, and then the DEM-EMBD coupling model is formed. The feasibility of the DEM-EMBD coupling model is verified through experiments. On this basis, the stress distribution state of the helical agitator is analysed based on the coupling method of the discrete element method and finite element method (DEM-EMBD-FEM). The DEM-EMBD coupling model can better reflect the dynamic characteristics of the vertical stirred mill by comparing it with the DEM model and the coupling method of discrete element method and computational fluid dynamics (DEM-CFD) respectively. Finally, the effects of vertical stirred mill structural parameters, operating parameters and grinding media size on mill performance are investigated by the DEM-EMBD and DEM-EMBD-FEM coupling models. The approach then provides insights into the structural design of vertical stirred mills, motor selection, and the welding process between the helical blades and screw.</div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141950282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of carboxymethyl chitosan on selective flotation separation of smithsonite from calcite with sodium oleate 羧甲基壳聚糖对利用油酸钠从方解石中选择性浮选分离铁燧岩的影响

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-07-30 DOI: 10.1016/j.apt.2024.104604

{"title":"Influence of carboxymethyl chitosan on selective flotation separation of smithsonite from calcite with sodium oleate","authors":"","doi":"10.1016/j.apt.2024.104604","DOIUrl":"10.1016/j.apt.2024.104604","url":null,"abstract":"<div>Addressing the persistent challenge of separating smithsonite from calcite using flotation method, this study explores the impact of carboxymethyl chitosan (CMCS) on selective separation using sodium oleate (NaOL) assisted flotation. Results indicated a substantial reduction in calcite recovery to 2.25 % with the addition of 40 mg/L CMCS at pH 9, while recovery of smithsonite remained essentially unchanged at 94.78 %. Moreover, we found that using CMCS as the depressant can effectively separate smithsonite from calcite, based on the flotation testing results with artificially mixed minerals. Contact angle tests results showed that CMCS can significantly lower the surface hydrophobicity of calcite without any negative effect on that of smithsonite when using NaOL as a collector. TOC, FTIR, AFM, and ToF-SIMS analyses demonstrated stronger adsorption of CMCS on the surface of calcite compared to smithsonite. XPS data, solution chemical analysis and DFT revealed interaction between –COO- in CMCS with Ca sites on the surface of calcite because of the electrostatic adsorption and chemical adsorption, forming −COOCa. It leaded to shielding effects on the NaOL adsorption stemming, which makes NaOL more adsorbed on smithsonite surface.</div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141950284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0