The effect of phosphonate-based growth modifiers on the morphology of hematite nanoparticles formed via acid hydrolysis of ferric chloride solutions
dc.contributor.author | Jones, Franca | |
dc.contributor.author | Ogden, Mark | |
dc.contributor.author | Oliveira, Allan | |
dc.contributor.author | Parkinson, Gordon | |
dc.contributor.author | Richmond, William | |
dc.date.accessioned | 2017-01-30T11:15:42Z | |
dc.date.available | 2017-01-30T11:15:42Z | |
dc.date.created | 2008-11-12T23:21:35Z | |
dc.date.issued | 2003 | |
dc.identifier.citation | Jones, Franca and Ogden, Mark I. and Oliveira, Allan and Parkinson, Gordon M. and Richmond, William R.. 2003. The effect of phosphonate-based growth modifiers on the morphology of hematite nanoparticles formed via acid hydrolysis of ferric chloride solutions. CrystEngComm 5 (30): 159-163. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/9919 | |
dc.description.abstract |
The effect of organic phosphonate-based additives on a-Fe2O3 (hematite) crystallization via the forced hydrolysis of ferric chloride solutions has been studied using a range of additives containing 2, 3 or 4 pendant phosphonate groups. The hydrolysis reactions were carried out at pH 1.1 with an iron concentration of 0.01 mol L21, and with Fe : additive ratios ranging from w8000 : 1 down to 200 : 1. In the absence of additive, the hematite particles are very uniform rhombic single crystals, with an average length of #100 nm. In the presence of phosphonates the particles become hexagonal, with the additives acting by inhibiting growth at (214 ) faces. At Fe : additive ratios lower than about 200 : 1, hematite formation is completely inhibited. Our results are consistent with a mechanism in which the akaganeite and hematite phases may both precipitate from the ferric chloride solution, with akaganeite apparently forming more rapidly than hematite. Inhibition of hematite formation by addition of the phosphonate additive can lead to b-FeOOH (akaganeite) being the dominant product phase, provided the concentration of Fe31 in solution is above the equilibrium solubility of the akaganeite phase. | |
dc.publisher | Royal Society of Chemistry | |
dc.relation.uri | http://www.rsc.org/Publishing/Journals/CE/article.asp?doi=b302911e | |
dc.relation.uri | http://xlink.rsc.org/?DOI=b302911e | |
dc.subject | akaganite | |
dc.subject | hematite | |
dc.subject | nanoparticle | |
dc.subject | phosphonate | |
dc.title | The effect of phosphonate-based growth modifiers on the morphology of hematite nanoparticles formed via acid hydrolysis of ferric chloride solutions | |
dc.type | Journal Article | |
dcterms.source.volume | 5 | |
dcterms.source.number | 30 | |
dcterms.source.month | may | |
dcterms.source.startPage | 159 | |
dcterms.source.endPage | 163 | |
dcterms.source.title | CrystEngComm | |
curtin.note |
This article was originally published by the Royal Society of Chemistry. | |
curtin.note |
It may not be further made available or distributed. | |
curtin.department | Nanochemistry Research Institute | |
curtin.identifier | EPR-585 | |
curtin.accessStatus | Open access | |
curtin.faculty | Research Centres | |
curtin.faculty | Curtin | |
curtin.faculty | Cooperative Research Centres | |
curtin.faculty | A.J. Parker CRC for Hydrometallurgy | |
curtin.faculty | Nanochemistry Research Centre |