Preparation of Highly Porous Carbonous Electrodes by Selective Laser Sintering

Lahtinen, Elmeri; Jokivartio, Joonas; Parkkonen, Joni; Virkajärvi, Jussi; Kivijärvi, Lauri; Ahlskog, M.; Haukka, Matti

doi:10.1021/acsaem.8b01881

Cited by 21 publications

(15 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to HIM imaging, SEM‐EDX analysis was performed to further confirm the macroporous structure of the object and the even distribution of the additive (Figures S1 and S2 in the Supporting Information). Due to the low porosity of the polymer matrix, which has also been shown previously,, the surface area of the supporting framework is small and therefore, the surface area of the printed object is dominated by the properties of the additive. This was confirmed by analysing the BET surface area of the 3D printed MOF/N12 object.…”

Section: Figurementioning

confidence: 60%

Selective Laser Sintering of Metal‐Organic Frameworks: Production of Highly Porous Filters by 3D Printing onto a Polymeric Matrix

et al. 2019

Self Cite

View full text Add to dashboard Cite

Metal‐organic frameworks (MOFs) have raised a lot of interest, especially as adsorbing materials, because of their unique and well‐defined pore structures. One of the main challenges in the utilization of MOFs is their crystalline and powdery nature, which makes their use inconvenient in practice. Three‐dimensional printing has been suggested as a potential solution to overcome this problem. We used selective laser sintering (SLS) to print highly porous flow‐through filters containing the MOF copper(II) benzene‐1,3,5‐tricarboxylate (HKUST‐1). These filters were printed simply by mixing HKUST‐1 with an easily printable nylon‐12 polymer matrix. By using the SLS, powdery particles were fused together in such a way that the structure of the printed solid material resembles the structure of a powder bed. The MOF additive is firmly attached only on the surface of partially fused polymer particles and therefore remains accessible to fluids passing through the filter. Powder X‐ray analysis of the printed object confirmed that printing did not have any negative impact on the structure of the MOF. CO2‐adsorption studies also showed that the activity of the MOF was not affected by the printing process. SLS offers a straightforward and easy way to fabricate tailor‐made MOF‐containing filters for practical applications.

show abstract

Section: Figurementioning

confidence: 60%

Selective Laser Sintering of Metal‐Organic Frameworks: Production of Highly Porous Filters by 3D Printing onto a Polymeric Matrix

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…In order to study the possible changes in physical structure of the catalytic objects, SEM images of outer surfaces and internal structures of the catalyst before and after the reactions were obtained. Analysis of the images revealed – typical for SLS 3d printed objects – a highly porous structure both on the surface and in the bulk of the objects, which remained principally intact after 10 reaction cycles. The only observed changes were associated with the loss of loosely attached larger particles of sizes≥100 μm, which did not undergo sintering during the 3d printing process due to their size (Figure ).…”

Section: Resultsmentioning

confidence: 97%

“…Therefore, SLS 3d printing allows fabrication of solid but highly porous objects, in which fluid can flow through the voids between the partially fused particles, making catalysts within the bulk of the object accessible for contact with the reaction medium. We have previously demonstrated the applicability of SLS 3d printing for the production of porous filters with various absorption properties, flexible carbonous electrodes, and heterogeneous hydrogenation catalysts, and in this work we further develop catalytically active 3d printed materials with implementation in Suzuki‐Miyaura cross‐coupling reaction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

3D Printed Palladium Catalyst for Suzuki‐Miyaura Cross‐coupling Reactions

et al. 2020

Self Cite

View full text Add to dashboard Cite

Selective laser sintering (SLS) 3d printing was utilized to manufacture a solid catalyst for Suzuki-Miyaura cross-coupling reactions from polypropylene as a base material and palladium nanoparticles on silica (SilicaCat Pd 0 R815-100 by SiliCycle) as the catalytically active additive. The 3d printed catalyst showed similar activity to that of the pristine powdery commercial catalyst, but with improved practical recoverability and reduced leaching of palladium into solution. Recycling of the printed catalyst led to increase of the induction period of the reactions, attributed to the pseudo-homogeneous catalysis. The reaction is initiated by oxidative addition of aryl iodide to palladium nanoparticles, resulting in formation of soluble molecular species, which then act as the homogeneous catalyst. SLS 3d printing improves handling, overall practicality and recyclability of the catalyst without altering the chemical behaviour of the active component.

show abstract

“…18−22 When the particles are sintered in such a way that only their surfaces are partially melted, a solid structure containing accessible voids between the sintered grains is obtained. 15,18,23 Also, a wide range of chemically active printing materials can be used without complicated preprocessing steps ranging from functional polymers to mixtures of functional additives and supporting polymer matrices. 23,24…”

Section: Introductionmentioning

confidence: 99%

Gold Nanoparticles on 3D-Printed Filters: From Waste to Catalysts

et al. 2019

Self Cite

View full text Add to dashboard Cite

Three-dimensionally printed solid but highly porous polyamide-12 (PA12) plate-like filters were used as selective adsorbents for capturing tetrachloroaurate from acidic solutions and leachates to prepare PA12–Au composite catalysts. The polyamide-adsorbed tetrachloroaurate can be readily reduced to gold nanoparticles by using sodium borohydride, ascorbic acid, hydrogen peroxide, UV light, or by heating. All reduction methods led to polyamide-anchored nanoparticles with an even size distribution and high dispersion. The particle sizes were somewhat dependent on the reduction method, but the average diameters were typically about 20 nm. Particle sizes were determined by using a combination of single-particle inductively coupled plasma mass spectrometry, helium ion microscopy, and powder X-ray diffraction. Dispersion of the particles was analyzed by scanning electron microscopy with energy-dispersive spectroscopy. Due to the high adsorption selectivity of polyamide-12 toward tetrachloroaurate, the three-dimensional-printed filters were first used as selective gold scavengers for the acidic leachate of electronicwaste (WEEE). The supported nanoparticles were then generated directly on the filter via a simple reduction step. These objects were used as catalysts for the reduction of 4-nitrophenol to 4-aminophenol. The described method provides a direct route from waste to catalysts. The selective laser sintering method can be used to customize the flow properties of the catalytically active filter object, which allows the optimization of the porous catalytic object to meet the requirements of catalytic processes.

show abstract

Preparation of Highly Porous Carbonous Electrodes by Selective Laser Sintering

Cited by 21 publications

References 32 publications

Selective Laser Sintering of Metal‐Organic Frameworks: Production of Highly Porous Filters by 3D Printing onto a Polymeric Matrix

Selective Laser Sintering of Metal‐Organic Frameworks: Production of Highly Porous Filters by 3D Printing onto a Polymeric Matrix

3D Printed Palladium Catalyst for Suzuki‐Miyaura Cross‐coupling Reactions

Gold Nanoparticles on 3D-Printed Filters: From Waste to Catalysts

Contact Info

Product

Resources

About