Home
Resources
Publications
Acetic Anhydride as an Oxygen Donor in the Non-Hydrolytic Sol-Gel Synthesis of Mesoporous TiO 2 with High Electrochemical Lithium Storage Performances

Acetic Anhydride as an Oxygen Donor in the Non-Hydrolytic Sol-Gel Synthesis of Mesoporous TiO 2 with High Electrochemical Lithium Storage Performances

Yanhui Wang, Sanghoon Kim, Nicolas Louvain, Johan G Alauzun, P Hubert Mutin

Chemistry. 2019 Mar 27;25(18):4767-4774.

PMID: 30633386

Abstract:

An original, halide-free non-hydrolytic sol-gel route to mesoporous anatase TiO2 with hierarchical porosity and high specific surface area is reported. This route is based on the reaction at 200 °C of titanium(IV) isopropoxide with acetic anhydride, in the absence of a catalyst or solvent. NMR spectroscopic studies indicate that this method provides an efficient, truly non-hydrolytic and aprotic route to TiO2 . Formation of the oxide involves successive acetoxylation and condensation reactions, both with ester elimination. The resulting TiO2 materials were nanocrystalline, even before calcination. Small (about 10 nm) anatase nanocrystals spontaneously aggregated to form mesoporous micron-sized particles with high specific surface area (240 m2 g-1 before calcination). Evaluation of the lithium storage performances shows a high reversible specific capacity, particularly for the non-calcined sample with the highest specific surface area favouring pseudo-capacitive storage: 253 mAh g-1 at 0.1 C and 218 mAh g-1 at 1 C (C=336 mA g-1 ). This sample also shows good cyclability (92 % retention after 200 cycles at 336 mA g-1 ) with a high coulombic efficiency (99.8 %). Synthesis in the presence of a solvent (toluene or squalane) offers the possibility to tune the morphology and texture of the TiO2 nanomaterials.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP2388105-A	Lithium isopropoxide		2388-10-5	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: