Pristine point of zero charge (p.p.z.c.) and zeta potentials of boehmite’s nanolayer and nanofiber surfaces
The pristine point of zero charge (p.p.z.c) and zeta potential as a function of pH of boehmite oxide/hydroxide (α-Al2O3·H2O) have been determined for three filter media. The active component in the first two filter media is boehmite nanofibers, only 2 nm in diameter and about 300 nm long. Boehmite n...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2016-01-01
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| Series: | International Journal of Smart and Nano Materials |
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| Online Access: | http://dx.doi.org/10.1080/19475411.2016.1148077 |
| _version_ | 1819033668664950784 |
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| author | Leonid A. Kaledin Fred Tepper Tatiana G. Kaledin |
| author_facet | Leonid A. Kaledin Fred Tepper Tatiana G. Kaledin |
| author_sort | Leonid A. Kaledin |
| collection | DOAJ |
| description | The pristine point of zero charge (p.p.z.c) and zeta potential as a function of pH of boehmite oxide/hydroxide (α-Al2O3·H2O) have been determined for three filter media. The active component in the first two filter media is boehmite nanofibers, only 2 nm in diameter and about 300 nm long. Boehmite nanofibers create high zeta potential (ζtrue≥46 mV) in aqueous solutions in the pH range of 3–8. The p.p.z.c. values were determined to be 11.60 ± 0.15 for nanofibers grafted onto microglass fibers and 11.40 ± 0.15 for agglomerated nanofibers. In the third filter media, a boehmite nanolayer in the form of monocrystalline oxide/hydroxide with a thickness of approximately 1.2 nm is electroadhesively deposited onto siliceous support material with large surface area of about 50 m2/g, therefore forming a highly electropositive composite of boehmite nanolayer on the second highly electronegative solid. Boehmite’s oxide-hydroxide nanolayer surface creates high zeta potential (ζtrue≥50 mV) in aqueous solutions in the pH range of 3–8. The p.p.z.c. value was determined to be 11.38 ± 0.15. The reported values are within accuracy, but they are much higher than the values reported in the literature. X-ray powder diffraction data were supplemented by microscopy, infrared spectroscopy in order to characterize fully synthetic boehmite surfaces. |
| first_indexed | 2024-12-21T07:21:30Z |
| format | Article |
| id | doaj.art-51499ba80cf74848b1b7c3c8df9a3ec5 |
| institution | Directory Open Access Journal |
| issn | 1947-5411 1947-542X |
| language | English |
| last_indexed | 2024-12-21T07:21:30Z |
| publishDate | 2016-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | International Journal of Smart and Nano Materials |
| spelling | doaj.art-51499ba80cf74848b1b7c3c8df9a3ec52022-12-21T19:11:46ZengTaylor & Francis GroupInternational Journal of Smart and Nano Materials1947-54111947-542X2016-01-017112110.1080/19475411.2016.11480771148077Pristine point of zero charge (p.p.z.c.) and zeta potentials of boehmite’s nanolayer and nanofiber surfacesLeonid A. Kaledin0Fred Tepper1Tatiana G. Kaledin2Argonide CorporationArgonide CorporationArgonide CorporationThe pristine point of zero charge (p.p.z.c) and zeta potential as a function of pH of boehmite oxide/hydroxide (α-Al2O3·H2O) have been determined for three filter media. The active component in the first two filter media is boehmite nanofibers, only 2 nm in diameter and about 300 nm long. Boehmite nanofibers create high zeta potential (ζtrue≥46 mV) in aqueous solutions in the pH range of 3–8. The p.p.z.c. values were determined to be 11.60 ± 0.15 for nanofibers grafted onto microglass fibers and 11.40 ± 0.15 for agglomerated nanofibers. In the third filter media, a boehmite nanolayer in the form of monocrystalline oxide/hydroxide with a thickness of approximately 1.2 nm is electroadhesively deposited onto siliceous support material with large surface area of about 50 m2/g, therefore forming a highly electropositive composite of boehmite nanolayer on the second highly electronegative solid. Boehmite’s oxide-hydroxide nanolayer surface creates high zeta potential (ζtrue≥50 mV) in aqueous solutions in the pH range of 3–8. The p.p.z.c. value was determined to be 11.38 ± 0.15. The reported values are within accuracy, but they are much higher than the values reported in the literature. X-ray powder diffraction data were supplemented by microscopy, infrared spectroscopy in order to characterize fully synthetic boehmite surfaces.http://dx.doi.org/10.1080/19475411.2016.1148077Boehmite’s nanolayerpristine point of zero charge (p.p.z.c)zeta potentialisoelectric point (i.e.p.) |
| spellingShingle | Leonid A. Kaledin Fred Tepper Tatiana G. Kaledin Pristine point of zero charge (p.p.z.c.) and zeta potentials of boehmite’s nanolayer and nanofiber surfaces International Journal of Smart and Nano Materials Boehmite’s nanolayer pristine point of zero charge (p.p.z.c) zeta potential isoelectric point (i.e.p.) |
| title | Pristine point of zero charge (p.p.z.c.) and zeta potentials of boehmite’s nanolayer and nanofiber surfaces |
| title_full | Pristine point of zero charge (p.p.z.c.) and zeta potentials of boehmite’s nanolayer and nanofiber surfaces |
| title_fullStr | Pristine point of zero charge (p.p.z.c.) and zeta potentials of boehmite’s nanolayer and nanofiber surfaces |
| title_full_unstemmed | Pristine point of zero charge (p.p.z.c.) and zeta potentials of boehmite’s nanolayer and nanofiber surfaces |
| title_short | Pristine point of zero charge (p.p.z.c.) and zeta potentials of boehmite’s nanolayer and nanofiber surfaces |
| title_sort | pristine point of zero charge p p z c and zeta potentials of boehmite s nanolayer and nanofiber surfaces |
| topic | Boehmite’s nanolayer pristine point of zero charge (p.p.z.c) zeta potential isoelectric point (i.e.p.) |
| url | http://dx.doi.org/10.1080/19475411.2016.1148077 |
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