Silica dioxide- sorbent nanofiber

Catalog	ACM60676860-9
CAS	60676-86-0
Structure
Synonyms	Nanofibrous inorganic powder structure, SiO2
Molecular Weight	60.08
Molecular Formula	SiO2
Application	Silica dioxide- sorbent nanofibers can absorb significantly more water than commercially available silicagel of the same mesoporous character. Applications include adsorbent of water and other polar sorbents, catalyst carrier, filtration, separation, li-ion battery separators, and sensors.
Fiber Diameter	800-1200 nm , structure: amorphous Length: continuous fibers
Form	nanofiber
Packaging	5g/10g
Specific Surface Area	spec. surface area 600-900 m2/g

Case Study

Composite Phase Change Materials of Electrospun SiO2 Nanofibers with Adsorbed Fatty Acid Cocrystals

Zong, Xue, et al. Solar Energy Materials and Solar Cells, 2015, 132, 183-190.

This work developed electrospun SiO2 nanofibers with incorporated fatty acid cocrystals to produce morphologically stable phase change materials (PCMs) for thermal energy storage applications.
Preparation of PCM Samples Based on SiO2 Nanofibers
Electrospinning produced SiO2 nanofibers which were then pyrolyzed. Four types of fatty acid cocrystals were examined as model PCMs: capric-lauric acid (CA-LA), capric-myristic acid (CA-MA), capric-palmitic acid (CA-PA), and capric-stearic acid (CA-SA).
Adsorption Performance of SiO2 Nanofibers for PCMs
• The electrospun SiO2 nanofiber mats displayed high PCM adsorption efficiency because of their well-known high porosity. The SiO2 substrate adsorbed four different fatty acid cocrystals with efficiencies measuring 82.0% for CA-LA and 83.7% for CA-MA while achieving 84.2% for CA-PA and 83.1% for CA-SA.
• The melting and freezing times for CA-LA, CA-MA, CA-PA and CA-SA cocrystals with SiO2 showed reductions of 28.6% and 30.8%, 20.0% and 44.4%, 62.5% and 50.0%, and 50.0% and 33.3% respectively compared to those of the fatty acid eutectics without supporting materials.
• The porous SiO2 structure allowed fatty acid eutectics to disperse effectively due to the action of capillary and surface tension forces. The composite PCM demonstrated elevated heat enthalpy values alongside appropriate phase transition temperatures due to electrospun SiO2 nanofibers which improved the composites' thermal energy storage and retrieval efficiency.

Evaluation of the Adsorption and Removal Performance of Toxic Dyes by SiO2 Nanofibers

Batool, S. S., et al. Solid State Sciences, 2016, 55, 13-20.

Researchers synthesized porous SiO2 nanofibers using electrospinning and investigated their ability to adsorb methyl orange and safranin O by varying pH levels, contact times, adsorbent amounts, dye concentrations and temperatures.
Performance evaluation of SiO2 nanofibers
• SiO2 nanofibers demonstrated superior performance as adsorption nanomaterials for extracting MO and SO dyes from water-based solutions. SiO2 nanofibers demonstrated effective adsorption ability for methyl orange at 730.9 mg/g and for safranin O at 940.4 mg/g.
• Methyl orange adsorption was enhanced under acidic pH conditions while alkaline pH conditions improved safranin O adsorption. The main adsorption mechanism for MO on partially negatively charged surfaces operates through multiple interactions beyond just electrostatic attraction. Several adsorption mechanisms between dyes and SiO2 nanofibers lead to improved toxic dye adsorption.