Strontium Titanate

• CAS: 12060-59-2
• Catalog Number: ACM12060592-23
• Category: Main Products
• Molecular Weight: 183.49
• Molecular Formula: SrTiO3
• Description: Strontium Titanate in forms such as wafer, powder, single crystal substrates, and sputtering targets in standard and custom dimensions. Available dopant materials include niobium, barium, nickel, and rare earth metals.
• Synonyms: Strontium titanium oxide, Strontium titanium trioxide, Strontium dioxido(oxo)titanium, La and Ni co-doped SrTiO3, Nb:TiO3, LSTN
• Canonical SMILES: [Sr++].[O-][Ti]([O-])=O
• InChI: InChI=1S/3O. Sr.Ti/q;2*-1;+2
• InChI Key: VEALVRVVWBQVSL-UHFFFAOYSA-N
• Melting Point: 2060 ℃
• Density: 4.81 g/mL at 25 °C (lit.)
• Appearance: Off-white to gray powder, Ingot or Lump
• Application: In electronics and electrochemical insulation; in photocatalysis; sputtering target for thin film capacitors; substrate for epitaxial growth of high temperature superconductor thin films. Diamond simulant gemstone.
• Storage: room temp
• EC Number: 235-044-1
• Form: crystalline (cubic (a=3.905 Å))
• MDL Number: MFCD00049554
• Packaging: 1 ea in rigid mailer
• Quality Level: 100

Case Study

Size Effect of Nanoscale Strontium Titanate in Photocatalytic Overall Water Splitting

Townsend, Troy K., et al. Acs Nano, 2012, 6(8), 7420-7426.

This work synthesized three different sizes of strontium titanate (SrTiO3, STO), including bulk STO, 30 ± 5 nm STO, and 6.5 ± 1 nm STO, to investigate the effect of STO size on the catalytic overall water splitting reaction in the presence of NiO co-catalyst. The results showed that all samples split water into a stoichiometric mixture of H2 and O2, but the activity decreased from 28 μmol H2 g-1 h-1 (bulk STO) to 19.4 μmol H2 g-1 h-1 (30 nm STO) and 3.0 μmol H2 g-1 h-1 (6.5 nm STO). Therefore, in order to fully exert the activity under UV light, the STO catalyst particles should be larger than 30 nm.
Synthesis and NiO loading of strontium titanate catalysts
· STO catalysts were prepared through high temperature solid-state reaction and hydrothermal autoclave routes to obtain bulk and nano-sized particles of STO . Bulk STO was synthesized from TiO2 and SrCO3 at high temperatures, producing 0.1-1.0 μm particles with a polycrystalline structure. Nano-sized particles of STO were obtained through a hydrothermal autoclave method and vapor diffusion sol-gel technique, resulting in particles of 30 nm and 6.5 nm, respectively.
· For NiO loading, the STO particles were mixed with an aqueous Ni(NO3)2 solution, sonicated, dried, and calcined at 400 °C in air. The sample was then treated with H2 at 500 °C to reduce nickel, followed by heating at 130 °C in an O2 atmosphere. This process resulted in the loading of NiO onto the SrTiO3 particles, forming the final catalyst product.

Study on the Surface Magnetism of Strontium Titanate

Kovalevsky, Andrei V., et al. Journal of materials chemistry A, 2017, 5(8), 3909-3922.

Strontium titanate (SrTiO3) is a substrate of choice for functional oxide heterostructures based on perovskite-structured thin film stacks. In order to determine the mechanism of magnetic moment generation in SrTiO3 at room temperature, four different sources of polished (100), (110) or (111) SrTiO3 crystal slices were characterized and analyzed before and after vacuum annealing at 750 °C.
Surface magnetism of SrTiO3
· SrTiO3 crystals can exhibit small magnetic signals on their surface due to extraneous ferromagnetic impurities present at the ppm level. These impurities may have a magnetic moment similar to that of thin films deposited on the crystals. It is essential to carefully characterize the substrates and run blank measurements when studying magnetic properties in thin-film heterostructures on SrTiO3.
· Additionally, high-temperature deposition processes can induce a temperature-independent 'ferromagnetic' signal attributed to the substrate itself, specifically SrTiO3. This phenomenon is linked to oxygen vacancies in the surface layer, sensitive to electron concentration, and can be modified by treatments like gating or using electron donor molecules.
· The high-temperature intrinsic magnetic signal at SrTiO3 surfaces is likely related to half-metallic defect impurities or a noncollinear spin texture from localized spin states and delocalized electron spins in surface quantum well states.
· Another explanation involves giant orbital paramagnetism from coherent orbital currents, requiring a magnetic surface layer thickness exceeding 10nm and the presence of mobile surface electrons. The absence of anisotropic demagnetizing fields in thin ferromagnetic surface layers remains unexplained.

Nano-Strontium Titanate Photocatalyst for Photocatalytic Degradation of Azo Dyes

Karimi, Loghman, et al. Journal of Saudi Chemical Society, 2014, 18(5), 581-588.

Nano-strontium titanate (SrTiO3, average particle size <100 nm) was used as a photocatalyst to study its photocatalytic degradation performance of azo dyes in aqueous solution under UV irradiation. Briefly, direct green 6 and reactive orange 72 were degraded by nano-SrTiO3 under 20 and 400 W UV irradiation, respectively. In addition, the effects of various parameters such as dye and photocatalyst concentrations, solution pH, temperature, and the presence of hydrogen peroxide were studied.
Photocatalytic performance of nano-SrTiO3
· An increase in nano-strontium titanate concentration in the solution leads to higher dye degradation. However, when nano-strontium titanate aggregates in concentrations of 1 g/L or higher, the degradation suddenly decreases.
· Additionally, the findings indicated that higher dye concentrations resulted in decreased photocatalyst degradation. Conversely, in acidic pH conditions, the surface area of nano-SrTiO3 was greater, leading to more efficient photocatalyst degradation. Rising process temperature and the addition of H2O2 were found to boost dye degradation.
· XRD and SEM results revealed that nano-SrTiO3 had larger particle sizes and smaller surface areas than nano-TiO2, but showed that the dye degradation capability of nano-strontium titanate was similar to that of titania.

Custom Reviews

February 6, 2023

---

An important raw material for electronic industry
Strontium titanate is an important raw material in electronic industry, which is used to automatically adjust heating elements and manufacture components with degaussing function.

Custom Q&A

What is the molecular formula of strontium titanate?

The molecular formula of strontium titanate is SrTiO3.

What is the molecular weight of strontium titanate?

The molecular weight of strontium titanate is 183.49 g/mol.

What are the synonyms for strontium titanate?

Some synonyms for strontium titanate include Strontium titanium oxide and Strontium titanium trioxide.

When was strontium titanate created and last modified?

Strontium titanate was created on August 8, 2005, and last modified on November 25, 2023.

What are the component compounds of strontium titanate?

The component compounds of strontium titanate are Strontium (CID 5359327) and Dihydroxy(oxo)titanium (CID 6373650).

What is the IUPAC name of strontium titanate?

The IUPAC name of strontium titanate is strontium;dioxido(oxo)titanium.

What is the InChI of strontium titanate?

The InChI of strontium titanate is InChI=1S/3O.Sr.Ti/q;2*-1;+2.

What is the InChIKey of strontium titanate?

The InChIKey of strontium titanate is VEALVRVVWBQVSL-UHFFFAOYSA-N.

What are the other identifiers for strontium titanate?

Other identifiers for strontium titanate include CAS number 12060-59-2 and UNII OLH4I98373.

What are some computed properties of strontium titanate?

Some computed properties of strontium titanate include a hydrogen bond acceptor count of 3, a topological polar surface area of 63.2 A², and a heavy atom count of 5.