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Forsling, Willis
Publications (10 of 163) Show all publications
Zhang, W.-M., Li, H.-M., Sun, Z.-X., Zhang, Q. & Forsling, W. (2012). Synthesis of mesoporous ZnS synergistically templated by butylamine and alkanols (ed.). Paper presented at . Microporous and Mesoporous Materials, 147(1), 222-228
Open this publication in new window or tab >>Synthesis of mesoporous ZnS synergistically templated by butylamine and alkanols
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2012 (English)In: Microporous and Mesoporous Materials, ISSN 1387-1811, E-ISSN 1873-3093, Vol. 147, no 1, p. 222-228Article in journal (Refereed) Published
Abstract [en]

Pore size and pore volume adjustable mesoporous ZnS was synthesized through a co-template method, which was achieved by the combined interaction between butylamine and some alkanols with proper lengths of the straight carbon chain. The pore size for mesoporous ZnS templated by butyl amine alone was 4.29 nm, and could be enlarged to 6.96 and 8.33 nm respectively through adding certain amounts of hexanol and octanol. Correspondingly, the pore volume also exhibited an augmentation with increasing carbon chain lengths of alkanols from C6 to C8. However, the pore size and pore volume dropped abruptly when decanol was added as the auxiliary agent. The formation of mesopores for ZnS prepared using butylamine molecules as the only templating agent is considered to be attributed to the coordination between N atoms in amines and Zn2+ ions at the surfaces of zinc suphide. The templating effect of butylamines might be improved by adding hexanols and octanols to form aggregates through solubilization to tailor the pore size and pore volume of ZnS effectively, while the function of decanols for changing the porous structure is restricted by its low solubility.

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-16188 (URN)10.1016/j.micromeso.2011.06.017 (DOI)000295906200029 ()2-s2.0-80052948180 (Scopus ID)fc8cae46-b7b5-455b-b110-f12cd97db644 (Local ID)fc8cae46-b7b5-455b-b110-f12cd97db644 (Archive number)fc8cae46-b7b5-455b-b110-f12cd97db644 (OAI)
Note
Validerad; 2012; 20110703 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Jolsterå, R., Gunneriusson, L. & Forsling, W. (2010). Adsorption and surface complex modeling of silicates on maghemite in aqueous suspensions (ed.). Paper presented at . Journal of Colloid and Interface Science, 342(2), 493-498
Open this publication in new window or tab >>Adsorption and surface complex modeling of silicates on maghemite in aqueous suspensions
2010 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 342, no 2, p. 493-498Article in journal (Refereed) Published
Abstract [en]

Adsorption of soluble silicate species, (Si(OH)4) on maghemite, (γ-Fe2O3) has been studied by high precision potentiometric titrations, spectroscopic analyses and zeta potential determinations. Titrations were performed at 25.0 °C within the range 2.8 < pH < 11.1 and at a constant ionic strength of 0.100 mol dm-3. The experimental data were evaluated using the constant capacitance model. For the maghemite - H+ system, the following values for the surface complexation constants and capacitance were found: ≡FeOH + H+ ↔ ≡FeOH2+; log βs11(int) = 5.39 ± 0.01 ≡FeOH ↔ ≡FeO- + H+; log βs-11(int) = -7.51 ± 0.01; C = 2.40 Fm-2.Three different concentration ratios of the determined concentration of active surface sites and added total silicate concentration, [≡FeOH]:[Si(OH)4], were examined (1:1, 2:1 and 3:1). A model comprising of three surface complexes, ≡FeOSi(OH)3, log βs011(int) = 3.61 ± 0.02; ≡FeOSiO(OH)2-, log βs-111(int) = -3.00 ± 0.01; and ≡FeOSiO2(OH)2-, log βs-211(int) = -11.35 ± 0.02; was found to best describe the experimental observations. Attempts to model the adsorption of silicates on maghemite as bidentate or polynuclear silicate complexes were not successful. The maximum silicate adsorption for the 1:1 ratio, approximately 80%, was obtained at pH 9 - 9.5. The IEP of maghemite in the presence of silicates (1:1 ratio) was determined from ζ-potential measurements, giving pHIEP ≈ 6.6.

Keywords
Natural sciences - Chemistry, Naturvetenskap - Kemi
National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-14062 (URN)10.1016/j.jcis.2009.10.080 (DOI)000274117400036 ()20006343 (PubMedID)2-s2.0-72649084654 (Scopus ID)d6084f90-caaf-11de-b769-000ea68e967b (Local ID)d6084f90-caaf-11de-b769-000ea68e967b (Archive number)d6084f90-caaf-11de-b769-000ea68e967b (OAI)
Note
Validerad; 2010; 20091106 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Holmgren, A., Mohammed-Ziegler, I., Forsling, W. & Ranheimer, M. (2010). Adsorption of pinosylvin onto different species of fresh and stored wood (ed.). Paper presented at . Materials Science: An Indian Journal, 6(4)
Open this publication in new window or tab >>Adsorption of pinosylvin onto different species of fresh and stored wood
2010 (English)In: Materials Science: An Indian Journal, ISSN 0974-7486, Vol. 6, no 4Article in journal (Refereed) Published
Abstract [en]

The adsorption of pinosylvin - a natural antifungal agent - on wood was studied by Raman microprobe technique. The adsorption properties of twelve different European wood species were compared. The effect of solvents used, heat treatment, and prolonged storage of the samples on pinosylvin adsorption ability was analysed by means of the Raman intensity ratios of characteristic lines. It was found that the surface concentration of pinosylvin increased when the Lewis acidity of the solvent increased. Besides, adsorption of pinosylvin was less efficient on during prolonged storage the surface of wood became more hydrophobic after prolonged sample storage. In case of heat treatment (1200C, 3 h) no remarkable effect on the amount of adsorbed pinosylvin was observed. Simultaneously, the intensity of the fluorescence background increases. Moreover, the possible influence of B.E.T. specific surface area and lignin content (described by the kappa-value) on the amount of adsorbed pinosylvin was investigated. As revealed, B.E.T. specific surface area did not vary significantly between the different wood species, and therefore it has no significant effect on the efficiency of pinosylvin adsorption. However, the surface concentration of pinosylvin seems to increas with the lignin content. The amount of solvent residue in each sample was measured by diffuse reflectance infrared Fourier transform (DRIFT) technique. For a few wood samples (e.g. pine heartwood, ash, and Hungarian oak) UV-Raman scattering was used to characterize the aromatic components of these wood species. The morphology of the samples was investigated with the aid of scanning electron microscopy (SEM) images. Furthermore, the B.E.T. specific surface area was found not to vary significantly between the different wood species, and therefore it has no significant effect on the efficiency of pinosylvin adsorption. However, the surface concentration of pinosylvin seems to increas with the lignin content. DRIFT spectroscopy was found to be useful to detect solvent residue in the wood samples and the evaporation of polar solvents is a rather slow process. However, it was not possible to detect adsorbed pinosylvin by DRIFT measurements, due to the low concentration and the lack of characteristic frequencies differing from other wood constituents.

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-3917 (URN)1c428840-02ea-11e0-803d-000ea68e967b (Local ID)1c428840-02ea-11e0-803d-000ea68e967b (Archive number)1c428840-02ea-11e0-803d-000ea68e967b (OAI)
Note
Godkänd; 2010; 20101208 (alho)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-04-05Bibliographically approved
Jolsterå, R., Gunneriusson, L. & Forsling, W. (2010). Surface characterisation and modelling of olivine at alkaline conditions (ed.). Paper presented at Annual V.M. Goldschmidt Conference : 13/06/2010 - 18/06/2010. Geochimica et Cosmochimica Acta, 74(12/Suppl 1), A477
Open this publication in new window or tab >>Surface characterisation and modelling of olivine at alkaline conditions
2010 (English)In: Geochimica et Cosmochimica Acta, ISSN 0016-7037, E-ISSN 1872-9533, Vol. 74, no 12/Suppl 1, p. A477-Article in journal, Meeting abstract (Other academic) Published
National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-40752 (URN)ffee7018-09ac-45b8-a735-77f5fd20086a (Local ID)ffee7018-09ac-45b8-a735-77f5fd20086a (Archive number)ffee7018-09ac-45b8-a735-77f5fd20086a (OAI)
Conference
Annual V.M. Goldschmidt Conference : 13/06/2010 - 18/06/2010
Note

Godkänd; 2011; 20110124 (andbra)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2020-03-27Bibliographically approved
Zhang, W.-M., Liu, J., Sun, Z.-X., Fan, B.-Q., Yang, Z.-D. & Forsling, W. (2010). Synthesis of mesoporous silica by a surface charge reversal route (ed.). Paper presented at . Journal of Colloid and Interface Science, 349(2), 473-476
Open this publication in new window or tab >>Synthesis of mesoporous silica by a surface charge reversal route
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2010 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 349, no 2, p. 473-476Article in journal (Refereed) Published
Abstract [en]

Pore size adjustable mesoporous silica was synthesized by adsorption of varying amount of sodium dodecyl benzenesulfonate at the surface of silica activated by zinc ion via a novel surface charge reversal route. The pore size and volume can be adjusted from 5.9 to 13.76 nm and 0.88 to 1.08 cm3·g-1 respectively with increasing the SDBS concentration from 0.77 to 3.08 mmol·L-1. Adsorption of Zn2+ as a function of pH and N2 adsorption/desorption isotherms demonstrated that the metal ions such as Zn2+ could be readily removed with dilute nitric acid without apparent collapse of the pore structure at the proper range of SDBS concentration.

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-9002 (URN)10.1016/j.jcis.2010.05.069 (DOI)000280692000002 ()2-s2.0-77955086487 (Scopus ID)78f8e440-6a41-11df-ab16-000ea68e967b (Local ID)78f8e440-6a41-11df-ab16-000ea68e967b (Archive number)78f8e440-6a41-11df-ab16-000ea68e967b (OAI)
Note
Validerad; 2010; 20100528 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Gustavsson, H., Weihed, P., Nordlund, E., Forsling, W., Öhlander, B. & Forssberg, E. (2009). Norrländsk vattenkraft och gruvnäring: två svenska välståndsbyggare. In: Roger Jacobsson (Ed.), Thule: Kungl. Skytteanska samfundets årsbok 2009 (pp. 331-345). Paper presented at . Umeå: Kungl. Skytteanska samfundet
Open this publication in new window or tab >>Norrländsk vattenkraft och gruvnäring: två svenska välståndsbyggare
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2009 (Swedish)In: Thule: Kungl. Skytteanska samfundets årsbok 2009, Umeå: Kungl. Skytteanska samfundet , 2009, p. 331-345Chapter in book (Other (popular science, discussion, etc.))
Place, publisher, year, edition, pages
Umeå: Kungl. Skytteanska samfundet, 2009
National Category
History of Technology Fluid Mechanics and Acoustics Geology Other Civil Engineering Geochemistry
Research subject
History of Technology; Fluid Mechanics; Ore Geology; Mining and Rock Engineering; Applied Geology
Identifiers
urn:nbn:se:ltu:diva-20035 (URN)15b834b0-d5c9-11de-bae5-000ea68e967b (Local ID)978-91-86438-36-4 (ISBN)15b834b0-d5c9-11de-bae5-000ea68e967b (Archive number)15b834b0-d5c9-11de-bae5-000ea68e967b (OAI)
Note

Godkänd; 2009; 20091120 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-03-15Bibliographically approved
Larsson, A.-C., Ivanov, A. V., Antzutkin, O. & Forsling, W. (2008). A 31P CP/MAS NMR study of PbS surface O,O′-dialkyldithiophosphate lead(II) complexes (ed.). Paper presented at . Journal of Colloid and Interface Science, 327(2), 370-376
Open this publication in new window or tab >>A 31P CP/MAS NMR study of PbS surface O,O′-dialkyldithiophosphate lead(II) complexes
2008 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 327, no 2, p. 370-376Article in journal (Refereed) Published
Abstract [en]

31P CP/MAS NMR spectroscopy was used to study the adsorption of six different O,O′-dialkyldithiophosphate ions on the surface of synthetic galena (PbS). The 31P CP/MAS NMR spectra of the surface lead(II) dithiophosphates were compared with the 31P CP/MAS NMR spectra of polycrystalline lead(II) dithiophosphate complexes of the same ligands. Surface complexation of the dialkyldithiophosphate ions was established on the surface of PbS. A terminal S,S′-chelating coordination is suggested for the surface complexes. The bulkier alkyl groups lead to surface precipitation in addition to the surface adsorption. Derivatives of monothiophosphoric and phosphoric acids were displayed as hydrolysis products of dialkyldithiophosphates on the synthetic PbS, the amount of which depends on the type of alkyl group.

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-13922 (URN)10.1016/j.jcis.2008.08.031 (DOI)000260151500014 ()18783784 (PubMedID)2-s2.0-53149146663 (Scopus ID)d3d4ffc0-b4a8-11dd-a6f7-000ea68e967b (Local ID)d3d4ffc0-b4a8-11dd-a6f7-000ea68e967b (Archive number)d3d4ffc0-b4a8-11dd-a6f7-000ea68e967b (OAI)
Note
Validerad; 2008; 20081117 (acla)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Bo, Q.-B., Sun, Z.-X. & Forsling, W. (2008). A new family of 3D 3d-4f heterometallic frameworks comprising 1D inorganic lanthanide ladders and organic Cu-bipyridine chains (ed.). Paper presented at . CrystEngComm, 10(2), 232-238
Open this publication in new window or tab >>A new family of 3D 3d-4f heterometallic frameworks comprising 1D inorganic lanthanide ladders and organic Cu-bipyridine chains
2008 (English)In: CrystEngComm, ISSN 1466-8033, E-ISSN 1466-8033, Vol. 10, no 2, p. 232-238Article in journal (Refereed) Published
Abstract [en]

A new family of the 3D heterometallic coordination polymers [{Ln2(SO4)2(H2O)2(pydc)2Cu2 (bpy)2·2(H2O)}]n (Ln = Sm ( 1), Eu ( 2), Gd ( 3), Tb ( 4) and Dy ( 5); pydc = 2,6-pyridine-dicarboxylate anion; bpy= 4,4-bipyridine) have successfully been synthesized under solvothermal conditions (H2O/ethanol). All the coordination polymers obtained were characterized by elemental analysis, FT-IR analysis, differential thermal analysis/thermogravimetry (DTA/TG), fluorescent spectra and single crystal X-ray diffraction analysis. The most intriguing structural feature is that all the compounds exhibit 3D frameworks with 1D inorganic lanthanide ladders and organic CuI-bipyridine chains, which represent two types of 3d/4f coordination polymers (form I: Ln = Sm and Eu; form II: Ln = Gd, Tb and Dy) as the result of a so-called gadolinium break effect. Additionally, compounds 2 and 4 showed the characteristic emission spectra of the EuIII and TbIII ions, respectively, and appeared to have good fluorescence properties, while 1, 3 and 5 emitted fluorescence resembling CuI complexes. To our knowledge, the investigation of the

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-8146 (URN)10.1039/b710786b (DOI)000252757400023 ()2-s2.0-38549170872 (Scopus ID)69dfb3e0-cae6-11dd-9935-000ea68e967b (Local ID)69dfb3e0-cae6-11dd-9935-000ea68e967b (Archive number)69dfb3e0-cae6-11dd-9935-000ea68e967b (OAI)
Note
Validerad; 2008; 20081215 (olan)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Sun, Z.-X., Ting-Ting, Z., Bo, Q.-B., Miao, D. & Forsling, W. (2008). Effects of calcination temperature on the pore size and wall crystalline structure of mesoporous alumina (ed.). Journal of Colloid and Interface Science, 319(1), 247-251
Open this publication in new window or tab >>Effects of calcination temperature on the pore size and wall crystalline structure of mesoporous alumina
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2008 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 319, no 1, p. 247-251Article in journal (Refereed) Published
Abstract [en]

In this paper, mesoporous alumina with different pore sizes and wall crystalline structures was synthesized at calcination temperatures over 550 °C. The characterization of the samples calcined at 550, 800, 1100, and 1300 °C, respectively, was performed using TEM, XRD, FTIR, TG/DTA, and N2 adsorption/desorption techniques. The correlation between pore size and wall crystalline structure on calcination temperature was systematically investigated.

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-10252 (URN)10.1016/j.jcis.2007.11.023 (DOI)000252750400032 ()2-s2.0-37849023754 (Scopus ID)907b5370-ce4c-11dc-91eb-000ea68e967b (Local ID)907b5370-ce4c-11dc-91eb-000ea68e967b (Archive number)907b5370-ce4c-11dc-91eb-000ea68e967b (OAI)
Note

Validerad; 2008; 20080129 (bajo)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Rozhdestvina, V. I., Ivanov, A., Zaremba, M. A., Antzutkin, O. & Forsling, W. (2008). Single-crystalline cooperite (PtS): crystal-chemical characterization, ESR spectroscopy, and Pt-195 NMR spectroscopy (ed.). Paper presented at . Crystallography reports (Print), 53(3), 391-397
Open this publication in new window or tab >>Single-crystalline cooperite (PtS): crystal-chemical characterization, ESR spectroscopy, and Pt-195 NMR spectroscopy
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2008 (English)In: Crystallography reports (Print), ISSN 1063-7745, E-ISSN 1562-689X, Vol. 53, no 3, p. 391-397Article in journal (Refereed) Published
Abstract [en]

Single-crystalline cooperite (PtS) with a nearly stoichiometric composition was characterized in detail by X-ray diffraction, electron-probe X-ray microanalysis, and high-resolution scanning electron microscopy. For the first time it was demonstrated that Pt-195 static and MAS NMR spectroscopy can be used for studying natural platinum minerals. The 195pt chemical-shift tensor of cooperite was found to be consistent with the axial symmetry and is characterized by the following principal values: delta(xx) = -5920 ppm, delta(yy) = -3734 ppm, delta(zz) = +4023 ppm, and delta(iso) = -1850 ppm. According to the ESR data, the samples of cooperite contain copper(II), which is adsorbed on the surface during the layer-by-layer crystal growth and is not involved in the crystal lattice.

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-10988 (URN)10.1134/S106377450803005X (DOI)000256233900005 ()2-s2.0-46749136485 (Scopus ID)9e284c30-4697-11dd-a00e-000ea68e967b (Local ID)9e284c30-4697-11dd-a00e-000ea68e967b (Archive number)9e284c30-4697-11dd-a00e-000ea68e967b (OAI)
Note
Validerad; 2008; 20080630 (bajo)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
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