Advanced Powder Technology最新文献_第3页

Self deep red luminescence in NaLaCaWO6 double perovskite, properties regulation via Er3+ doping, and applications in favorable optical thermometry with ultra high relative sensitivity and plant lighting NaLaCaWO6 双包晶中的自深红色发光、通过掺杂 Er3+ 进行的性能调节，以及在具有超高相对灵敏度的有利光学温度测量和植物照明中的应用

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-11 DOI: 10.1016/j.apt.2024.104688

{"title":"Self deep red luminescence in NaLaCaWO6 double perovskite, properties regulation via Er3+ doping, and applications in favorable optical thermometry with ultra high relative sensitivity and plant lighting","authors":"","doi":"10.1016/j.apt.2024.104688","DOIUrl":"10.1016/j.apt.2024.104688","url":null,"abstract":"<div><div>Self deep red emission was found for the first time in NaLaCaWO<sub>6</sub> double perovskite which was synthesized <em>via</em> solid-state reaction, and the luminescence was effectively enhanced and regulated <em>via</em> Er<sup>3+</sup> doping. A comprehensive analysis of the calcination atmosphere dependent photoluminescence, X-ray photoelectron spectroscopy, and electron paramagnetic resonance revealed that the deep red luminescence is particularly related to oxygen defects of oxygen interstitials. The plant growth lighting and the optical thermometry performance of the materials were systematically investigated. Under 360 nm or 502 nm excitation, the pristine NaLaCaWO<sub>6</sub> exhibits deep red emission at 690 nm that nicely matches the photosensitive pigment (P<sub>FR</sub>) essential for plant growth. The deep red luminescence of NaLaCaWO<sub>6</sub> was 230 % increased by Er<sup>3+</sup> doping. Moreover, deep red emission of the host and green emission of the Er<sup>3+</sup> shows extinguished different temperature depend luminescence behavior, and dual-mode optical thermometry with ultra high relative sensitivity (<em>S<sub>r</sub></em>) was built based on the materials. Remarkably, the maximum <em>S<sub>r</sub></em> based on the fluorescence intensity ratio (FIR) mode reached 3.84 % K<sup>−1</sup> (498 K), and maximum <em>S<sub>r</sub></em> is as high as 13.1 % K<sup>−1</sup> (548 K) when based on the fluorescence lifetime (FL) mode. The results indicate that the NaLaCaWO<sub>6</sub>:Er<sup>3+</sup> phosphor shows promising potential application in the field of plant growth and optical temperature sensing.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428038","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

Water-induced formation of Cs2AgBiBr6/BiOBr heterostructure with enhanced visible-light photocatalytic activity 水诱导形成具有增强可见光光催化活性的 Cs2AgBiBr6/BiOBr 异质结构

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-07 DOI: 10.1016/j.apt.2024.104679

{"title":"Water-induced formation of Cs2AgBiBr6/BiOBr heterostructure with enhanced visible-light photocatalytic activity","authors":"","doi":"10.1016/j.apt.2024.104679","DOIUrl":"10.1016/j.apt.2024.104679","url":null,"abstract":"<div><div>The separation and transfer of photogenerated charges are limited by the deep energy defects and high exciton binding energy of Cs<sub>2</sub>AgBiBr<sub>6</sub> (CABB). The creation of heterostructure is a great promising path to solve this obstacle. In this paper, BiOBr (BOB) nanosheets epitaxially grew on the surface of CABB octahedrons through immersing CABB into in water-solution with the assistance of ethanol, thereby creating an interesting CABB/BOB heterojunction. The CABB/BOB heterostructure markedly enhances water stability, preserving its structure and morphology even after being submerged in a mixture of ethanol and water for 100 h. The CABB/BOB photocatalyst exhibited significantly enhanced photocatalytic activity towards the degradation of Rhodamine B in comparison to its individual pristine components, namely CABB and BOB. Specifically, the advanced CABB/BOB−90 photocatalyst attains a degradation efficiency of 98 % within 40 min, significantly surpassing the initial CABB and BOB photocatalysts by approximately 1.3 and 4.1 times, respectively. The heightened photocatalytic activity is attributable to the formation of a tightly integrated heterojunction interface, which promotes the efficient separation of charge carriers.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428036","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

An innovative process for clean ammonium-free vanadium precipitation and one-step preparation of vanadium dioxide based on hydrothermal enhancement of organic alcohols 基于水热法增强有机醇的清洁无铵钒沉淀和一步法制备二氧化钒的创新工艺

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-04 DOI: 10.1016/j.apt.2024.104682

{"title":"An innovative process for clean ammonium-free vanadium precipitation and one-step preparation of vanadium dioxide based on hydrothermal enhancement of organic alcohols","authors":"","doi":"10.1016/j.apt.2024.104682","DOIUrl":"10.1016/j.apt.2024.104682","url":null,"abstract":"<div><div>As a transition metal oxide, VO<sub>2</sub> has excellent optical and electrical properties and is widely used in many fields. The production of VO<sub>2</sub> by the reduction of NH<sub>4</sub>VO<sub>3</sub> and V<sub>2</sub>O<sub>5</sub> will inevitably produce ammonia–nitrogen wastewater and NH<sub>3</sub> emission during the production of NH<sub>4</sub>VO<sub>3</sub> and V<sub>2</sub>O<sub>5</sub>, which will cause serious environmental pollution and will increase economic costs. The large-scale and low-cost synthesis of VO<sub>2</sub> still faces great challenges. In this paper, VO<sub>2</sub>(B) was successfully prepared by a one-step hydrothermal method using NaVO<sub>3</sub> as the vanadium source and CH<sub>3</sub>CH<sub>2</sub>OH as the reducing agent, and the optimal conditions for vanadium precipitation are as follows: vanadium concentration = 30 g/L, CH<sub>3</sub>CH<sub>2</sub>OH dosage = 20 % (percentage of solution volume), initial pH = 1, reaction temperature = 220 °C, reaction time = 12 h. The vanadium precipitation efficiency under the optimal conditions could reach 98.93 %, and the purity of VO<sub>2</sub>(B) could reach 98.59 %. The precipitation products were characterized by XRD, TG, FTIR, XPS, and SEM-EDS. The mechanism of VO<sub>2</sub>(B) preparation by ethanol reduction was proposed. This process is characterized by green, clean, and high efficiency. At the same time, the vanadium precipitation effect and vanadium precipitation products of various alcohols were studied to provide technical and theoretical support for the preparation of VO<sub>2</sub>(B).</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428033","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

Effects of excipient properties on pharmaceutical printlet fabrication via selective laser sintering 3D printing 辅料特性对通过选择性激光烧结三维打印技术制造药用打印件的影响

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-02 DOI: 10.1016/j.apt.2024.104678

{"title":"Effects of excipient properties on pharmaceutical printlet fabrication via selective laser sintering 3D printing","authors":"","doi":"10.1016/j.apt.2024.104678","DOIUrl":"10.1016/j.apt.2024.104678","url":null,"abstract":"<div><div>In this study, the impact of excipients on the quality of printlets manufactured using selective laser sintering (SLS) 3D printing was investigated. Various thermoplastic polymers, commonly used as pharmaceutical additives, and mannitol of different particle property grades, were used as excipients. SLS can produce complex structures and customize drug release rates; therefore, it can be used for personalized medicine. The significance of selecting suitable excipients, focusing on their powder flowability and printability, and their influence on the printlet properties was evaluated. An optimal amount of yellow iron oxide, a necessary laser-absorbing agent for printlet formation, was determined. Results revealed that excipients with optimal flow and shape characteristics considerably enhanced the printlet quality. The relation between the powder properties of excipients (internal friction angle, shear adhesion force, and flow function coefficient) and the SLS printing outcomes was evaluated using the powder shear cell test. The powder properties considerably affected the application of the powder layer using a spreader from the powder reservoir to the building platform. Moreover, the electron laser density impacted the printlet hardness. The as-fabricated printlets exhibited higher porosity and faster dissolution rates than traditional tablets, suggesting the potential advantages of using SLS in drug manufacturing.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428037","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

X-ray computed tomography (XCT) study of jetting in a fluidized bed: Measurement method development and single component fluidization 流化床喷射的 X 射线计算机断层扫描 (XCT) 研究：测量方法开发和单组分流化

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-01 DOI: 10.1016/j.apt.2024.104681

{"title":"X-ray computed tomography (XCT) study of jetting in a fluidized bed: Measurement method development and single component fluidization","authors":"","doi":"10.1016/j.apt.2024.104681","DOIUrl":"10.1016/j.apt.2024.104681","url":null,"abstract":"<div><div>Air injected into a fluidized bed through a perforated plate distributor may form individual jets above the distributor plate, which can have a significant impact on the gas–solid flow and heat/mass transfer in the dense phase region. Therefore, it is important to study the jetting characteristics in a fluidized bed, but the measurement of such jets is extremely challenging because of the opaque dense phase region. In this paper, an X-ray computed tomography (XCT) measurement system was constructed, and three-dimensional reconstruction software based on the cone beam filtered back projection algorithm (FDK) was implemented. A jet recognition and quantification algorithm was also developed and tested. Based on these methods, the influence of the jet velocity (<em>U</em><sub>j</sub>) and bed material size (<em>d</em><sub>p</sub>) on the structure and shape of the jets was studied. The results show that when the jet velocity increases, the average jet length (<em>L</em>), jet maximum diameter (<em>D</em>), and jet volume (<em>V</em>) increase, while the average jet half angle (<em>θ</em>) fluctuates around a constant value. Under the same jet velocity (<em>U</em><sub>j</sub>), the average jet length (<em>L</em>), jet maximum diameter (<em>D</em>), and jet volume (<em>V</em>) are inversely proportional to the bed material size (<em>d</em><sub>p</sub>), while the average jet half angle (<em>θ</em>) is directly proportional to the bed material size (<em>d</em><sub>p</sub>). Finally, a correlation for jet length (<em>L</em>) in a fluidized bed is proposed. This study provides a new characterization method for jetting in a fluidized bed, and offers unique experimental data for CFD model validation in fluidized bed simulations.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428034","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 effect of cylinder structure on the pre-dusting of axial separator 筒体结构对轴向分离器预除尘的影响

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-01 DOI: 10.1016/j.apt.2024.104685

引用次数: 0

3D CFD simulation of wet rough particles hydrodynamics in a pulsed fluidized bed using kinetic theory of rough spheres model 利用粗糙球体模型动力学理论对脉冲流化床中的湿粗糙颗粒流体力学进行三维 CFD 模拟

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-10-01 DOI: 10.1016/j.apt.2024.104680

{"title":"3D CFD simulation of wet rough particles hydrodynamics in a pulsed fluidized bed using kinetic theory of rough spheres model","authors":"","doi":"10.1016/j.apt.2024.104680","DOIUrl":"10.1016/j.apt.2024.104680","url":null,"abstract":"<div><div>In the framework of kinetic theory of rough spheres (KTRS) model, a dynamic coefficient of restitution model is introduced to describe the collision behavior between wet rough particles in liquid. Based on the two-fluid model (TFM) combining kinetic theory of rough spheres, numerical simulations are conducted on the flow characteristic of rough particles and liquid in a pulsed fluidized bed. The simulation results are firstly validated against experimental data reported by Ehsani et al. Subsequently, the effects of pulsation flow on liquid–solid two-phase flow, particle collision and particle rotation behavior are studied. The results indicate that resonance fluidization occurs at a frequency of 1 Hz, which is approached to the natural frequency of the bed. Furthermore, the particle volume fraction increases with the pulsation amplitude at this frequency. Conversely, at a frequency of 36 Hz, the volume fraction exhibits the opposite trend with the pulsation amplitude. The interstitial fluid increases the dissipation of kinetic energy in particle collision, though its effect is much smaller than that caused by particle rotation.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428032","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

Exploration of the formative mechanisms of colon-targeting composite particles of natural products prepared via mechanical dry particle coating 探索通过机械干法颗粒包衣制备的天然产品结肠靶向复合颗粒的形成机制

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-09-30 DOI: 10.1016/j.apt.2024.104648

{"title":"Exploration of the formative mechanisms of colon-targeting composite particles of natural products prepared via mechanical dry particle coating","authors":"","doi":"10.1016/j.apt.2024.104648","DOIUrl":"10.1016/j.apt.2024.104648","url":null,"abstract":"<div><div>Mechanical dry particle coating, coating fine particles in waterless environment, possesses great potential to prepare colon-targeting composite particles of natural products. However, host and guest particles physical properties may impact its surface coverage efficiency. This study selected 10 natural products and 4 colon-targeting excipients as host and guest particles, respectively, and characterized 13 physical properties. Using planetary ball mill, 40 composite particles were prepared and evaluated for SEM, infrared features, and in vitro release. Grey relation analysis, served as the core method, identified critical materials attributes of host and guest particle physical properties affecting the surface coverage and colon-targeting of composite particles. Results indicated that only 9 composite particles achieved favorable surface coverage and in vitro colon-targeting, like guar gum coated total saponins of Pulsatilla with respective surface area coverage and maximum cumulative drug release in colon of 76.71 % and 83.55 %, and revealed the prerequisite of well-covered structure of composite particle for colon-targeting. Identified critical material attributes, including particle size and specific surface area, etc., affected surface coverage efficiency through influencing interparticle forces for adhesion, particularly in van der Waals forces. Moreover, guest particle with favorable hydrophobicity may form a hydrophobic layer, preventing host particles from dissolving under well-covered structure.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359137","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

Flotation separation scheelite from calcite by using a novel depressant of Poly(sodium 4-styrenesulfonate) 利用新型抑制剂聚（4-苯乙烯磺酸钠）从方解石中浮选分离白钨矿

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-09-27 DOI: 10.1016/j.apt.2024.104664

{"title":"Flotation separation scheelite from calcite by using a novel depressant of Poly(sodium 4-styrenesulfonate)","authors":"","doi":"10.1016/j.apt.2024.104664","DOIUrl":"10.1016/j.apt.2024.104664","url":null,"abstract":"<div><div>Scheelite and calcite was firstly separated by new depressant Poly(sodium 4-styrenesulfonate) (PSS) with NaOL system. The recovery of scheelite was 87.18 % and the recovery of calcite was 5.57 % in single flotation experiments, the recovery and grade of WO<sub>3</sub> was 70.53 % and 61.08 % respectively in artificial mixed ore flotation under the optimal conditions of 10 mg/L NaOL, 10 mg/L PSS and pH of 8. Contact angle measurements, atomic force microscope (AFM) analysis, zeta potential analysis, fourier transforming infrared spectra (FT-IR) analysis and X-ray photoelectron spectroscopy (XPS) analysis were performed to uncover the reaction mechanism. The results showed that PSS could not adsorbed on scheelite by chemical reaction, and PSS had no impact on the further adsorption of NaOL onto the scheelite surface. Therefore, scheelite could still keep a high recovery with PSS. However, PSS could be strongly adsorbed on calcite by chemisorption between the Ca site of calcite and O site of PSS, which increased the hydrophilia of calcite and imped the further adsorption of NaOL. Therefore, it could selectively depress the flotation of calcite.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327724","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

Development of thermally stable, single-phased CaAl4O7:Dy3+ phosphor and a study on their down-conversion features for lighting applications 开发热稳定的单相 CaAl4O7:Dy3+ 荧光粉并研究其在照明应用中的下转换特性

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-09-27 DOI: 10.1016/j.apt.2024.104672

{"title":"Development of thermally stable, single-phased CaAl4O7:Dy3+ phosphor and a study on their down-conversion features for lighting applications","authors":"","doi":"10.1016/j.apt.2024.104672","DOIUrl":"10.1016/j.apt.2024.104672","url":null,"abstract":"<div><div>This investigation underscores the structural, optical and temperature-dependent photoluminescence characteristics of CaAl<sub>4</sub>O<sub>7</sub>:Dy<sup>3+</sup>-doped phosphor synthesized via microwave-assisted combustion synthesis route for the first time. The sample crystallizes in monoclinic structure affirmed by XRD analysis. Morphological behaviour was conducted via SEM analysis. The existence of functional groups was validated through FTIR study. Bandgap of the optimized sample was established as 4.11 eV from the UV–VIS absorbance spectra. The emission spectra possessed characteristic peaks of Dy<sup>3+</sup> ion around 485 nm (blue), 576 nm (yellow) upon suitable excitation at 347 nm. The concentration of Dy<sup>3+</sup> ion at <em>x</em> = 0.03 was established to be optimal. The CIE chromaticity co-ordinate of (x = 0.347, y = 0.427), correlated color temperature of 5109 K and color purity of 32.87 % were inferred. The PL decay time for CaAl<sub>4</sub>O<sub>7</sub>:Dy<sup>3+</sup>(<em>x</em> = 0.03) phosphor was obtained as 0.31 ms. Excellent thermal stability of the sample was established from the temperature-dependent PL analysis. To assess the lighting ability of the phosphor, phosphor-in-glass (P-i-G) material was fabricated. Superior luminous efficacy (428 lm/W) and luminous efficiency (62.66 %) were established for the fabricated P-i-G. The outcome vividly declares the potency of the CaAl<sub>4</sub>O<sub>7</sub>:Dy<sup>3+</sup>phosphor as a promising contender for n-UV excited phosphors for wLED applications.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327723","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