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Vall, M., Strömme, M. & Cheung, O. (2019). Amine-Modified Mesoporous Magnesium Carbonate as an Effective Adsorbent for Azo Dyes. ACS OMEGA, 4(2), 2973-2979
Open this publication in new window or tab >>Amine-Modified Mesoporous Magnesium Carbonate as an Effective Adsorbent for Azo Dyes
2019 (English)In: ACS OMEGA, ISSN 2470-1343, Vol. 4, no 2, p. 2973-2979Article in journal (Refereed) Published
Abstract [en]

Mesoporous magnesium carbonate (MMC) was evaluated as a potential candidate material for removal of dyes from textile industry wastewater. The adsorption property of MMC was analyzed for three different azo dyes: reactive black 5 (RB5), amaranth (AM), and acid red 183 (AR183). Further, the effect of porosity, amine modification, ionic strength, and pH was evaluated. MMC modified with 3-(aminopropyl)-triethoxysilane (aMMC) showed consistently high uptake levels for all of the azo dyes tested; the uptake of RB5, AM, and AR183 was similar to 360, similar to 143 and similar to 170 mg/g, respectively. The results demonstrated the importance of porosity and surface chemistry in the effective adsorption of the azo dye in aqueous systems. The uptake of RB5 and AM on aMMC was not significantly affected by pH (when varied between 4 and 10), although reduced uptake of RB5 and AM was observed at pH values <2 and >12. The addition of NaCl salt at concentrations up to 1000 mM had minimal effect on the high uptake of RB5 on aMMC. The uptake of AM by aMMC was reduced by approximately 20% in the presence of NaCl even at low concentrations. The uptake of AR183 by aMMC varied noticeably by changes in pH and no specific trend was observed. The presence of NaCl also adversely affected the uptake of AR183 on aMMC. The adsorption of the azo dye on aMMC was most likely driven by electrostatic interactions. We show here that aMMC is a potential candidate adsorbent for the effective removal of azo dyes from textile wastewaters.

National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-379941 (URN)10.1021/acsomega.8b03493 (DOI)000460237300054 ()
Funder
Swedish Research Council, 2014-3929
Available from: 2019-03-26 Created: 2019-03-26 Last updated: 2019-03-26Bibliographically approved
Vall, M., Strömme, M. & Cheung, O. (2019). Amine-Modified Mesoporous Magnesium Carbonate as an Effective Adsorbent for Azo Dyes. ACS Omega, 4, 2973-2979
Open this publication in new window or tab >>Amine-Modified Mesoporous Magnesium Carbonate as an Effective Adsorbent for Azo Dyes
2019 (English)In: ACS Omega, Vol. 4, p. 2973-2979Article in journal (Refereed) Published
Abstract [en]

Mesoporous magnesium carbonate (MMC) was evaluated as a potential candidate material for removal of dyes from textile industry wastewater. The adsorption property of MMC was analyzed for three different azo dyes: reactive black 5 (RB5), amaranth (AM), and acid red 183 (AR183). Further, the effect of porosity, amine modification, ionic strength, and pH was evaluated. MMC modified with 3-(aminopropyl)triethoxysilane (aMMC) showed consistently high uptake levels for all of the azo dyes tested; the uptake of RB5, AM, and AR183 was ∼360, ∼143 and ∼170 mg/g, respectively. The results demonstrated the importance of porosity and surface chemistry in the effective adsorption of the azo dye in aqueous systems. The uptake of RB5 and AM on aMMC was not significantly affected by pH (when varied between 4 and 10), although reduced uptake of RB5 and AM was observed at pH values <2 and >12. The addition of NaCl salt at concentrations up to 1000 mM had minimal effect on the high uptake of RB5 on aMMC. The uptake of AM by aMMC was reduced by approximately 20% in the presence of NaCl even at low concentrations. The uptake of AR183 by aMMC varied noticeably by changes in pH and no specific trend was observed. The presence of NaCl also adversely affected the uptake of AR183 on aMMC. The adsorption of the azo dye on aMMC was most likely driven by electrostatic interactions. We show here that aMMC is a potential candidate adsorbent for the effective removal of azo dyes from textile wastewaters.

National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-380594 (URN)10.1021/acsomega.8b03493 (DOI)
Available from: 2019-03-29 Created: 2019-03-29 Last updated: 2019-04-10Bibliographically approved
Åhlén, M., Cheung, O. & Strömme, M. (2019). Amorphous Mesoporous Magnesium Carbonate as a Functional Support for UV-Blocking Semiconductor Nanoparticles for Cosmetic Applications. ACS Omega, 4(2), 4429-4436
Open this publication in new window or tab >>Amorphous Mesoporous Magnesium Carbonate as a Functional Support for UV-Blocking Semiconductor Nanoparticles for Cosmetic Applications
2019 (English)In: ACS Omega, ISSN 2470-1343, Vol. 4, no 2, p. 4429-4436Article in journal (Refereed) Published
Abstract [en]

Highly porous amorphous mesoporous magnesium carbonate (MMC) with a Brunauer–Emmett–Teller (BET) surface area over 600 m2·g–1 was evaluated as a micrometer-sized support for TiO2 and ZnO semiconductor nanoparticles. The resulting MMC-TiO2-ZnO contained 25 wt % TiO2 and 25 wt % ZnO incorporated into an MMC structure without blocking the pores as revealed by nitrogen sorption isotherms, scanning electron microscopy, and transmission electron microscopy. In vitro ultraviolet (UV) light-blocking experiments showed that the MMC-TiO2-ZnO had comparable UV-blocking ability as a TiO2 and ZnO nanoparticle mixture containing the same amount of semiconductor particles without a support. Amaranth dye degradation studies revealed that MMC was able to diminish the catalytic activity of TiO2 and ZnO nanoparticles, possibly due to the presence of free carbonate ions in MMC as well as in the dye solution. In summary, this paper demonstrated for the first time that micrometer-sized particles of the recently emerged MMC materials can be used as a support for sun-blocking semiconductor nanoparticles without compromising their UV blocking ability and with significantly lowered photocatalytic activity. When used in a formulation as a support for semiconductor nanoparticles, MMC may also reduce the risk of nanoparticle exposure, and the high porosity of MMC-TiO2-ZnO may be utilized for the delivery of therapeutic agents to the skin.

National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-379180 (URN)10.1021/acsomega.8b03498 (DOI)000460237300215 ()
Funder
Swedish Research Council, 2014-3929
Available from: 2019-03-13 Created: 2019-03-13 Last updated: 2019-03-25Bibliographically approved
Strömme, M. (2019). Be ready for new opportunities! Nanotechnology will totally change our society, industry and lives. In: Enfo (Ed.), Integration Days 2019: . Paper presented at Integration Days 31/1-1/2 2019, Lindholmen Conference Centre GOTHENBURG, SWEDEN. Göteborg
Open this publication in new window or tab >>Be ready for new opportunities! Nanotechnology will totally change our society, industry and lives
2019 (English)In: Integration Days 2019 / [ed] Enfo, Göteborg, 2019Conference paper, Oral presentation with published abstract (Other academic)
Place, publisher, year, edition, pages
Göteborg: , 2019
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-375517 (URN)
Conference
Integration Days 31/1-1/2 2019, Lindholmen Conference Centre GOTHENBURG, SWEDEN
Available from: 2019-01-30 Created: 2019-01-30 Last updated: 2019-05-09Bibliographically approved
Vall, M., Hultberg, J., Strömme, M. & Cheung, O. (2019). Carbon dioxide adsorption on mesoporous magnesium carbonate. Paper presented at 10th International Conference on Applied Energy (ICAE), Hong Kong, August 22-25, 2018. Energy Procedia, 158, 4671-4676
Open this publication in new window or tab >>Carbon dioxide adsorption on mesoporous magnesium carbonate
2019 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 158, p. 4671-4676Article in journal (Refereed) Published
Abstract [en]

Mesoporous magnesium carbonate (MMC) was synthesized and tested for its ability to separate CO2 from N2. The pure gas CO2 uptake of MMC was around 1.5 mmol/g at 101 kPa, 0 °C. The N2 uptake under the same conditions was less than 0.1 mmol/g. Al(NO3)3, Al2O3, K2CO3 and KNO3 were introduced into the porous structure of MMC as additives. All of the additives tested increased the CO2 uptake of MMC and increased its selectivity towards CO2. The incorporation of 5 wt.% K2CO3 increased the CO2 uptake of MMC up to over 3.2 mmol/g. The ideally adsorbed solution theory was used to calculate the CO2 selectivity of MMC and MMC with additives for a hypothetical gas mixture that contained 15% CO2: 85% N2. The CO2 selectivity at 101 kPa (0 °C) was around 60. MMC with 5 wt.% K2CO3 had a CO2 selectivity of over 150 under the same conditions. Vacuum swing cyclic CO2 adsorption/desorption showed that the CO2 uptake on MMC with 5 wt.% K2CO3 decreased after each cycle. Heat regeneration (up to 250 °C, for 10 minutes) could recover most of the lost CO2 capacity after each cycle. Heat regeneration indicatively improved the cyclic performance of this adsorbent. MMC with 5 wt.% K2CO3 was the best performing adsorbent in this study and can potentially be further developed into a good CO2 adsorbent for temperature swing adsorption (TSA) processes.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Carbon Capture, Storage, Gas separation, Adsorbent, Magnesium carbonate
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-379696 (URN)10.1016/j.egypro.2019.01.738 (DOI)000471031705006 ()
Conference
10th International Conference on Applied Energy (ICAE), Hong Kong, August 22-25, 2018
Note

Part of special issue: Innovative Solutions for Energy Transitions

Available from: 2019-03-19 Created: 2019-03-19 Last updated: 2019-08-05Bibliographically approved
Sun, R., Tai, C.-W., Strömme, M. & Cheung, O. (2019). Hierarchical Porous Carbon Synthesized from Novel Porous Amorphous Calcium or Magnesium Citrate with Enhanced SF6 Uptake and SF6/N2 Selectivity. ACS Applied Nano Materials, 2(2), 778-789
Open this publication in new window or tab >>Hierarchical Porous Carbon Synthesized from Novel Porous Amorphous Calcium or Magnesium Citrate with Enhanced SF6 Uptake and SF6/N2 Selectivity
2019 (English)In: ACS Applied Nano Materials, ISSN 2574-0970, Vol. 2, no 2, p. 778-789Article in journal (Refereed) Published
Abstract [en]

The emission of greenhouse gases such as CO2and SF6 is believed to contribute significantly toward globalwarming. One way to reduce their release is by adsorption atpoint sources using a suitable adsorbent. In this work we presentthe synthesis of two hierarchical porous carbon materials(referred to as PC-CaCit and PC-MgCit) with a high uptake ofSF6 (5.23 mmol/g, 0 °C, 100 kPa) and a reasonable uptake ofCO2 (>3 mmol/g). PC-CaCit and PC-MgCit were obtained bypyrolysis of the most porous calcium citrate and magnesiumcitrate ever reported, which were synthesized by us. TheLangmuir specific surface area of PC-CaCit and PC-MgCit wasover 2000 m2/g (BET surface area also close to 2000 m2/g). Wecharacterized PC-CaCit and PC-MgCit using a range of advanced characterization techniques including N2 adsorption, highresolutionelectron microscopy, powder X-ray diffraction, and X-ray photoelectron spectroscopy. PC-CaCit and PC-MgCit alsoshowed a SF6-over-N2 selectivity of ∼33 at 0 °C (100 kPa), good cyclic performance, and moderately low heat of adsorption.The porous carbons synthesized in this work are good candidate adsorbents for greenhouse gases.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019
Keywords
porous carbon, SF6 adsorption, CO2 adsorption, amorphous calcium citrate, amorphous magnesium citrate
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-381054 (URN)10.1021/acsanm.8b02005 (DOI)000469409900019 ()
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Available from: 2019-04-03 Created: 2019-04-03 Last updated: 2019-06-24Bibliographically approved
Zhou, S., Strömme, M. & Xu, C. (2019). Highly Transparent, Flexible, and Mechanically Strong Nanopapers of Cellulose Nanofibers @Metal–Organic Frameworks. Chemistry - A European Journal, 25(14), 3515-3520
Open this publication in new window or tab >>Highly Transparent, Flexible, and Mechanically Strong Nanopapers of Cellulose Nanofibers @Metal–Organic Frameworks
2019 (English)In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 25, no 14, p. 3515-3520Article in journal (Refereed) Published
Abstract [en]

Freestanding nanopapers are fabricated by the assembly of metal-organic frameworks (MOFs) onto cellulose nanofibers (CNFs). The CNFs are wrapped by continuously nucleated MOF layers (CNF@MOF) by interfacial synthesis, the charge density on the surface of the CNFs and the dosage of the surfactant polyvinylpyrrolidone (PVP) being carefully adjusted. The obtained CNF@MOF nanofibers with long-range, continuous, hybrid nanostructures are very different to the composites formed by aggregation of MOF nanoparticles on the substrates. Four typical MOFs (HKUST-1, Al-MIL-53, Zn-MOF-74, ZIF-CO3-1) are successfully grown onto CNFs in aqueous solutions and further fabricated into freestanding nanopapers. Because of the unique nanostructures and morphologies, the corresponding flexible nanopapers exhibit hierarchical meso-micropores, high optical transparency, high thermal stability, and high mechanical strength. A proof-of-concept study shows that the CNF@MOF nanopapers can be used as efficient filters to separate volatile organic compounds (VOCs) from the air. This work provides a new path for structuring MOF materials that may boost their practical application.

Keywords
metal-organic frameworks, cellulose nanofibers, interfacial synthesis, nanopaper, VOC separation
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-375427 (URN)10.1002/chem.201806417 (DOI)000460692100013 ()30688380 (PubMedID)
Funder
ÅForsk (Ångpanneföreningen's Foundation for Research and Development), 18-413
Available from: 2019-01-29 Created: 2019-01-29 Last updated: 2019-04-12Bibliographically approved
Sterby, M., Emanuelsson, R., Mamedov, F., Strömme, M. & Sjödin, M. (2019). Investigating electron transport in a PEDOT/Quinone conducting redox polymer with in situ methods. Electrochimica Acta, 308, 277-284
Open this publication in new window or tab >>Investigating electron transport in a PEDOT/Quinone conducting redox polymer with in situ methods
Show others...
2019 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 308, p. 277-284Article in journal (Refereed) Published
Abstract [en]

A conducting redox polymer is investigated in acidic electrolyte using various in situ methods, including electron paramagnetic resonance (EPR), UV–vis spectroscopy, and conductance measurements. The quinone redox active pendant group has a formal potential of 0.67 V (vs. standard hydrogen electrode) where a 2e2H process occurs. By analyzing the rate constant at different temperatures, the rate-limiting step in the redox reaction was found to be a thermally activated process with an activation energy of 0.3 eV. The electron transport through the conducting polymerwas found to be non-thermally activated and, hence, not redox rate-limiting. This is also the first time a negative temperature dependence has been reported for a conducting redox polymer in the same potential region where the redox active pendant group has its formal potential. EPR and conductance data indicated that the conductivity is governed by both polarons and bipolarons but their ratio is shifting during oxidation and reduction of the polymer.

Keywords
Conducting Redox Polymer, PEDOT, Quinone, Temperature dependence
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-383025 (URN)10.1016/j.electacta.2019.03.207 (DOI)000466713100030 ()
Funder
Carl Tryggers foundation Swedish Energy AgencySwedish Research CouncilStiftelsen Olle Engkvist ByggmästareSwedish Research Council Formas
Available from: 2019-05-07 Created: 2019-05-07 Last updated: 2019-06-10Bibliographically approved
Strömme, M. (2019). Nanotechnology –: Thinking Big in Oil and Gas. In: Oslo Energy Forum (Ed.), THE 2019 OSLO ENERGY FORUM: Opportunities for the Next Decade. Paper presented at THE 2019 OSLO ENERGY FORUM, Opportunities for the Next Decade, 12-14 February 2019 Grand Hotel, Oslo, Norway.
Open this publication in new window or tab >>Nanotechnology –: Thinking Big in Oil and Gas
2019 (English)In: THE 2019 OSLO ENERGY FORUM: Opportunities for the Next Decade / [ed] Oslo Energy Forum, 2019Conference paper, Oral presentation with published abstract (Other academic)
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-376924 (URN)
Conference
THE 2019 OSLO ENERGY FORUM, Opportunities for the Next Decade, 12-14 February 2019 Grand Hotel, Oslo, Norway
Available from: 2019-02-12 Created: 2019-02-12 Last updated: 2019-05-09Bibliographically approved
Strömme, M. (2019). Nanotechnology: The driver of the next industrialrevolution. In: Skagen Funds (Ed.), SKAGEN Fund’s New Year Conference 2019: . Paper presented at SKAGEN Fund’s New Year Conference 2019, Oslo 7-10/1 2019.
Open this publication in new window or tab >>Nanotechnology: The driver of the next industrialrevolution
2019 (English)In: SKAGEN Fund’s New Year Conference 2019 / [ed] Skagen Funds, 2019Conference paper, Oral presentation with published abstract (Other academic)
National Category
Other Materials Engineering
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-372319 (URN)
Conference
SKAGEN Fund’s New Year Conference 2019, Oslo 7-10/1 2019
Available from: 2019-01-07 Created: 2019-01-07 Last updated: 2019-05-09Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-5496-9664

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