Potassium titanium oxalate

• CAS: 14481-26-6
• Catalog Number: ACM14481266
• Category: Main Products
• Molecular Weight: 390.12
• Molecular Formula: C₆K₂O₁₂Ti
• Synonyms: DIPOTASSIUM BIS(OXALATO)OXOTITANATE(+4)DIHYDRATE;POTASSIUM BIS(OXALATO)OXOTITANATE(IV);POTASSIUM TITANIUM OXIDE OXALATE-2-HYDRATE;POTASSIUM TITANIUM OXALATE DIHYDRATE;POTASSIUM TITANIUM OXIDE OXALATE DIHYDRATE;TITANIUM POTASSIUM OXALATE DIHYDRATE;Titanium oxalate, potassium;Titanate(2-), bis[ethanedioato(2-)-O,O]oxo-, dipotassium, (SP-5-21)-
• IUPAC Name: Dipotassium titanium oxide dioxalate
• Boiling Point: 365.1ºC at 760mmHg
• Exact Mass: 335.84000
• Packing Group: III

Case Study

Preparation of Photocatalyst Using Potassium Titanium Oxalate as Precursor

Lei, E., et al. Solid State Sciences, 2019, 88, 36-40.

TiO2 powders with varying morphologies and phase structures were synthesized using potassium titanium oxalate and H2O2 in an acidic medium. In the absence of H2O2, a novel compound, C2O7Ti2·3H2O, was formed through the reaction of potassium titanium oxalate with HCl. Photocatalytic tests indicate that C2O7Ti2·3H2O exhibits significant photocatalytic activity in the degradation of methyl orange (MO), with the superoxide radical (·O2-) playing a crucial role in the degradation process.
Synthesis of samples
· In a standard synthesis method, 1.58 g of potassium titanium oxalate (C4K2O9Ti·2H2O, >90%) was dissolved in 30 mL of distilled water while stirring magnetically at room temperature.
· Subsequently, 30 mL of a 30% H2O2 solution was added to the mixture. After 30 minutes of stirring, the solution rapidly transformed into a bright reddish-brown color.
· Following this, a specified volume of HCl (37 wt.%) was introduced while stirring vigorously. After one hour, the solution was transferred into a sealed Teflon vessel (100 mL) and maintained at 120 °C for 12 hours.
· Once the Teflon vessel was allowed to cool to room temperature, the resulting white precipitate was filtered and subsequently washed three times with distilled water and ethanol, respectively. Finally, the product was dried in an oven at 60 °C for 2 hours.

Potassium Titanium Oxalate for Coagulation to Remove Trace Arsenic and Cadmium from Water

Zhou, Juanjuan, et al. npj Clean Water, 2023, 6(1), 9.

This work reported that potassium titanium oxalate [K2TiO(C2O4)2] was capable of precipitating arsenite (As(III)), arsenate (As(V)) and cadmium at the same time, and that its potential to precipitate As and Cd exceeded aluminum salts currently employed in drinking water treatment. Moreover, K2TiO(C2O4)2 coagulation consumes some of the hardness of naturally occurring water and also generates K+ as a healthy byproduct.
Coagulation Mechanism of As and Cd by K2TiO(C2O4)2
· When K2TiO(C2O4)2 is added to drinking water, it undergoes hydrolysis and reacts with the naturally occurring Ca2+ present in the water. This process results in the formation of hydrous TiO2 (or TiO(OH)2) and crystalline CaC2O4. During this reaction, As(III) and As(V) are adsorbed onto the surface of the TiO(OH)2 particles, effectively removing them from the water.
· The negatively charged surface of TiO(OH)2 also allows for the adsorption of some Cd2+ ions. Given that Cd and Ca share similar chemical valences and ionic radii, a significant portion of the Cd becomes encapsulated within the lattice of CaC2O4, resulting in the creation of a Cd-doped Ca(Cd)C2O4 mixed crystal.
· Overall, the introduction of K2TiO(C2O4)2 facilitates the effective use of Ti and C2O4^2-, with the sole byproduct being K+ (no Ti or C2O4^2- were found in the effluent), which is beneficial for human health. Additionally, this process leads to a reduction in water hardness and an enhancement of taste due to the precipitation of natural Ca2+/Mg2+ by C2O4^2-.