An array of highly oriented anatase nanoparticles was successfully prepared from NH₄TiOF₃ with the assistance of polyetheleneglycol-400 at 450 °C. The study showed the stability of obtained layered TiO₂-anatase close to 1200 °C. This research confirmed for the first time that the transition of mesocrystalline anatase to the rutile phase occurs between 1000 °C and 1200 °C, which is more than 400 °C higher than the transition of bulk TiO₂ due to the used precursor. A small quantity of K-phase nanowhiskers, which issued after 800 °C in the composite based on TiO₂, stimulated a fourfold increase in photocatalytic performance. This study offers a new approach to the construction and preparation of effective nanocrystalline photocatalyst.

The mechanism of MFI zeolite nanosheet formation was established under accelerated conditions using perchlorate ions and fresh zeolite seeds as promoters. The results indicated that the particles after pretreatment were initially formed as an ordered amorphous assembly that was stepwise converted into zeolite nanosheets. The MFI nanosheet fabrication occurs through the transformation from an MCM-41-like structure to a KIT-1-like structure, lamellar structure, disordered lamellar structure and MFI nanosheets. The application of uniform microwave heating with the addition of promoters made it possible to obtain the assembly of all types of structures in 6 hours. The MFI nanosheet generation process was analyzed by X-ray powder diffraction, IR spectroscopy, N₂ adsorption isotherm measurements, SEM and TEM. A linear function of selectivity for bulky products in the solid acid alkylation process in proportion to the concentration of Brønsted acid sites has been determined for the materials possessing a mesophase.

The annual production of plastic waste is a serious ecological problem as it causes substantial pollution of the environment. Polyethylene terephthalate, a material usually found in disposable plastic bottles, is one of the most popular material used for packaging in the world. In this paper, it is proposed to recycle polyethylene terephthalate waste bottles into benzene-toluene-xylene fraction using a heterogeneous nickel phosphide catalyst formed in situ during the polyethylene terephthalate recycling process. The catalyst obtained was characterized using powder X-ray diffraction, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy techniques. The catalyst was shown to contain a Ni₂P phase. Its activity was studied in a temperature range of 250–400 °C and a H₂ pressure range of 5–9 MPa. The highest selectivity for benzene-toluene-xylene fraction was 93% at quantitative conversion.