Catalog | ACM7631869-86 |
CAS | 7631-86-9 |
Structure | ![]() |
Description | diam. × L ~425 nm (±50 nm) × infinity |
Synonyms | Nanofibrous inorganic powder, SiO2 |
Molecular Weight | 60.08 |
Molecular Formula | SiO2 |
Application | Silica nanofibers are yielded through a novel ac electrospinning process resulting in extraordinary aspect ratios, consistent purity, and consistent certification of form parameters that are difficult if not impossible to achieve using other nanofiber production methods. Potential applications include filtration membranes and catalyst support. |
Storage | Storage Class Code: 13 - Non Combustible Solids |
Fiber Diameter | 425 nm (±50 nm) |
Form | nanofiber |
MDL Number | MFCD00011232 |
Packaging | 5g |
Wen, Shipeng, et al. Materials Letters 64.13 (2010): 1517-1520.
The current work synthesized the hierarchical electrospun SiO2 nanofibers doped with SiO2 nanoparticles by sol-gel process and electrospinning technology combined with a high-temperature pyrolysis process. The developed SiO2 nanofibers with tunable roughness/porosity could be applied in dental composites and catalytic supports.
Key Results:
· Four spinning solutions were prepared with 0, 1.47, 2.90 and 4.29 wt.% SiO2 nanoparticles.
· The obtained hierarchical electrospun SiO2 nanofibers have fiber diameters of about 500 nm and nanoparticle sizes of tens of nanometers.
· The pre-gelation of TEOS in the spinning solutions before electrospinning was very important to get a uniform morphology for both electrospun precursor and SiO2 nanofibers.
· SiO2 nanoparticles are mainly distributed on the surfaces of the fibers and the surface roughness and porosity of SiO2 nanofibers can be tuned by changing SiO2 nanoparticle concentration.
Kuang, Lei, et al. Journal of Agricultural and Food Chemistry 68.31 (2020): 8362-8369.
Challenge: Industrial biocatalysis struggles with unstable enzyme systems that poorly target oil-water interfaces, leading to low reusability and costly emulsion processing.
Solution: Immobilizing Burkholderia cepacia lipase (BCL) on tunable hydrophobic SiO2 nanofiber membranes (NFMs) through precision electrospinning and surface modification.
Key Results:
· The SiO2 NFMs facilitated the effective catalysis of BCL at the oil-water interface.
· The BCL loading and catalytic activity on SiO2 NFMs were affected by surface hydrophobicity of electrospun SiO2 NFMs. An increase in hydrophobicity led to a decline in activity from 2.43-fold to 0.74-fold compared to free BCL.
· Conversely, the lipase loading capacity significantly improved as the hydrophobicity of SiO2 NFMs rose from 0 to 143°, with no notable changes observed when hydrophobicity increased from 143 to 153°.
· The gel trapping method revealed that the hydrolytic activity of BCL-SiO2 NFM bioreactors depends on the contact area of the membrane at the oil-water interface.
· After five cycles of reuse, BCL-SiO2 NFM, BCL-SiO2 NFM-C12, and BCL-SiO2 NFM-C18 retained 32%, 83%, and 42% of their activity, respectively.
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