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First identification of primary nanoparticles in the aggregation of HMF.

Zhang M, Yang H, Liu Y, Sun X, Zhang D, Xue D - Nanoscale Res Lett (2012)

Bottom Line: The residual solution is found to contain a massive number of primary nanoparticles.Based on these observations, a mechanism involving the formation and aggregation of the nanoparticles is proposed.This mechanism differs considerably from the conventional understanding in the open literature.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Mechanical and Chemical Engineering and Centre for Energy, The University of Western Australia, 35 Stirling Highway, Perth, Western Australia, 6009, Australia. hong.yang@uwa.edu.au.

ABSTRACT
5-Hydroxymethylfurfural [HMF] is an important intermediate compound for fine chemicals. It is often obtained via hydrothermal treatment of biomass-derived carbohydrates, such as fructose, glucose and sucrose. This study investigates the formation of carbonaceous spheres from HMF created by dehydration of fructose under hydrothermal conditions. The carbonaceous spheres, ranging between 0.4 and 10 μm in diameter, have granulated morphologies both on the surface and in the interior. The residual solution is found to contain a massive number of primary nanoparticles. The chemical structure of the carbonaceous spheres was characterised by means of FTIR and NMR spectroscopies. Based on these observations, a mechanism involving the formation and aggregation of the nanoparticles is proposed. This mechanism differs considerably from the conventional understanding in the open literature.

No MeSH data available.


Related in: MedlinePlus

SEM and TEM images of carbonaceous spheres, revealing details of grainy surfaces and interiors. Carbon spheres produced at (a, b) 423 and (c, d) 453 K. (e, f) Cross-sectional views revealing the interior of the carbonaceous spheres.
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Figure 1: SEM and TEM images of carbonaceous spheres, revealing details of grainy surfaces and interiors. Carbon spheres produced at (a, b) 423 and (c, d) 453 K. (e, f) Cross-sectional views revealing the interior of the carbonaceous spheres.

Mentions: Hydrothermal treatment of fructose solution in an autoclave at temperatures in the range of 423 to 463 K for different times produced carbonaceous solids in a spherical shape. Figure 1 shows SEM images of carbon spheres produced under hydrothermal conditions. Micrograph (a) shows carbon spheres synthesised at 423 K for 6 h. The spheres, typically 100 to 300 nm in diameter under these conditions, are granular on their surfaces. Micrograph (b) is a TEM image of the same sample, revealing the same features.


First identification of primary nanoparticles in the aggregation of HMF.

Zhang M, Yang H, Liu Y, Sun X, Zhang D, Xue D - Nanoscale Res Lett (2012)

SEM and TEM images of carbonaceous spheres, revealing details of grainy surfaces and interiors. Carbon spheres produced at (a, b) 423 and (c, d) 453 K. (e, f) Cross-sectional views revealing the interior of the carbonaceous spheres.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3278355&req=5

Figure 1: SEM and TEM images of carbonaceous spheres, revealing details of grainy surfaces and interiors. Carbon spheres produced at (a, b) 423 and (c, d) 453 K. (e, f) Cross-sectional views revealing the interior of the carbonaceous spheres.
Mentions: Hydrothermal treatment of fructose solution in an autoclave at temperatures in the range of 423 to 463 K for different times produced carbonaceous solids in a spherical shape. Figure 1 shows SEM images of carbon spheres produced under hydrothermal conditions. Micrograph (a) shows carbon spheres synthesised at 423 K for 6 h. The spheres, typically 100 to 300 nm in diameter under these conditions, are granular on their surfaces. Micrograph (b) is a TEM image of the same sample, revealing the same features.

Bottom Line: The residual solution is found to contain a massive number of primary nanoparticles.Based on these observations, a mechanism involving the formation and aggregation of the nanoparticles is proposed.This mechanism differs considerably from the conventional understanding in the open literature.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Mechanical and Chemical Engineering and Centre for Energy, The University of Western Australia, 35 Stirling Highway, Perth, Western Australia, 6009, Australia. hong.yang@uwa.edu.au.

ABSTRACT
5-Hydroxymethylfurfural [HMF] is an important intermediate compound for fine chemicals. It is often obtained via hydrothermal treatment of biomass-derived carbohydrates, such as fructose, glucose and sucrose. This study investigates the formation of carbonaceous spheres from HMF created by dehydration of fructose under hydrothermal conditions. The carbonaceous spheres, ranging between 0.4 and 10 μm in diameter, have granulated morphologies both on the surface and in the interior. The residual solution is found to contain a massive number of primary nanoparticles. The chemical structure of the carbonaceous spheres was characterised by means of FTIR and NMR spectroscopies. Based on these observations, a mechanism involving the formation and aggregation of the nanoparticles is proposed. This mechanism differs considerably from the conventional understanding in the open literature.

No MeSH data available.


Related in: MedlinePlus