Titanium dioxide milled nanofibers

Catalog	ACM13463677-54
CAS	13463-67-7
Structure
Synonyms	Nanofibrous inorganic powder, TiO2 anatase/rutile
Molecular Weight	79.87
Molecular Formula	TiO2
Appearance	white
Application	Titania oxdie-anatase/rutil nanofibers has energy applications as energy convertor in solar cells, air/fuel ratio controllor in automotive, humidity and gas sensors, electrobe materials in batteries, solid oxide fuel cells, inorganic membranes, dye sensitized solar cells, photocatalyic degradation of votile compounds (VOC), bacteria and NOx, and waste water purification.
Storage	Storage Class Code: 13 - Non Combustible Solids
Conductivity	<10^-16 S/cm (Electrical)
Fiber Diameter	200-800 nm ± 100 nm
Form	nanofiber powder (fluffy)
Length	2-10 μm
Packaging	5g/10g
Specification	primary crystallite size: (anatase-rutil Typical Size of Crystallites: 10 nm)
Specific Surface Area	10 m2/g
Thermal Conductivity	6.5 Wm-1K-1
Type	Polycystalline nanofibers

Case Study

Mesoporous Titanium Dioxide Nanofibers with Significantly Enhanced Photocatalytic Activity

Ghosh, Monoj, et al. ChemCatChem, 2016, 8(15), 2525-2535.

Researchers produced mesoporous titanium dioxide nanofibers with adjustable diameter and crystal structure by calcining polyvinyl pyrrolidone and titanium isopropoxide precursors at temperatures between 500-700°C through a scalable gas jet fiber spinning method.
Photocatalytic activity of TiO2 nanofibers
• Among the nanofibers examined, the T600 nanofibers which were calcined at a maximum temperature of 600 °C demonstrated significantly superior photocatalytic activity in gas-phase ethanol oxidation under UV light compared to commercial nanoparticles. The distinctive arrangement of nanocrystallites within the fibrous structures enhanced charge separation (electron-hole) and facilitated the oxidation process due to improved charge transport and reduced recombination rates.
• The findings indicated that a specific ratio (36/64 in T600 nanofibers) of anatase to rutile phases is necessary for achieving a higher photo-oxidation rate of ethanol.
• Kinetic analysis showed a transition from ·OH-mediated oxidation to O₂^--mediated oxidation of CH3CH2OH molecules, leading to the production of CO2 and H2O within 10 minutes. In contrast, the hole-driven oxidation of CH3CH2OH on P25 TiO2 nanoparticles resulted in a slower conversion to CO2 and H2O.

PVA/TiO2 Nanofibers Serve as the Light Scattering Layer in Dye-Sensitized Solar Cells

Mustafa, Muhammad Norhaffis, et al. Scientific reports, 2019, 9(1), 14952.

The light scattering layer (LSL) serves to reduce or prevent light loss throughout the functioning of DSSCs. Polyvinyl alcohol/titanium dioxide (PVA/TiO2) nanofibers for use as light scattering layers were produced with electrospinning methods on TiO2 nanoparticle photoanodes.
• Preparation of PVA/TiO2 Nanofibers
Polyvinyl alcohol (PVA) was dissolved in deionized water to create a 10 wt.% solution which became clear after constant stirring at 80 °C. After preparing the PVA solution, 0.06 M titanium tetraisopropoxide (TTIP) was introduced and the mixture stirred for two hours to produce an electrospinning solution. The prepared solution was loaded into a 5 mL syringe equipped with a blunt needle. The electrospinning process operated at 15 kV with a flow rate of 1.2 mL/h while keeping the needle tip 15 cm away from the ITO/compact layer/TiO2 photoanodes current collector. The PVA/TiO2 nanofibers were produced after 9.88 minutes of electrospinning.
• Key Findings
Enhancing TiO2 nanoparticles with PVA/TiO2 nanofibers resulted in a power conversion efficiency of 4.06% which showed a 33% improvement over TiO2 nanoparticles that did not have an LSL. PVA/TiO2 nanofibers employed as an LSL minimize radiation losses while intensifying electron excitation which leads to improved PCE values. The presence of these nanofibers increases both electron lifetime and charge collection efficiency when compared to TiO2 nanoparticles lacking an LSL.