Highly porous TiO₂nanofibres with a fractal structure

Abstract

TiO2 nanofibres were prepared using a templating method with tetraisopropylorthotitanate (TiPT) as a precursor. The preparation comprises liquid phase deposition on cellulose fibres followed by thermal removal of the cellulose template. The obtained TiO2 fibrous substance consists of micron-size fibres with a microstructure of nanofibres. It was demonstrated that nanofibres are basically formed through the aggregation of TiO2 nanoparticles and nanorods into chain structures during the thermal treatment process. The measured surface area of the TiO2 fibres was about 250 m2 g−1. It was shown that the pore size distribution is multi-scale and a fractal morphology was demonstrated with two fractal regimes with dimensions of 1.78 and 2.97 for sizes below and above 7.5 nm, respectively. The crystalline phase of the TiO2 nanofibres, as well as the nanoparticles in the solution, could be controlled by the pH of the solution. A pH of 1.2 resulted in rutile phase, while a pH of 1.8 resulted in anatase phase.

Effect of nanostructured electrode architecture and semiconductor deposition strategy on the photovoltaic performance of quantum dot sensitized solar cells

“…The first paste produces electrodes with high effective surface area, while the other two are commonly employed as light scattering layers in DSCs. The hollow fibers (F) were synthesized as previously described [35,36]. A solution of ethyl cellulose solution was prepared by dissolving 1g of ethyl cellulose in 12.5 ml ethanol assisted by ultrasonication.…”

Synthesis of water soluble Pd‐Piperidoimidazolin‐2‐ylidene complexes and their catalytic activities in neat water

“…The size of the particles can also be obtained from the XRD spectra. This shows the preferential orientation of the facet {111} in Pd nanoparticles …”

Interaction of Titanium (IV) Chloride Vapor with Cotton Cellulose and Catalytic Properties of the Titanium Dioxide Obtained

“…Обработка целлюлозы тетраизопропилортотитанатом для получения волокон TiO 2 прово-дится в течение нескольких суток [7]. Более простой способ получения волокон реализован с использованием водного раствора тетрафторида титана, в процессе гидролиза которого образуется пересыщенный раствор оксидных соединений титана, осаждающихся на поверх-ности волокна [8].…”