Synthesis of TiO₂ Nanocrystals with a High Affinity for Amine Organic Compounds

Abstract

This article describes a different approach to the colloidal synthesis of TiO(2) nanocrystals using a polymer melt as a solvent. This approach allowed us to obtain a colloidal dispersion with a high degree of stability in a polymeric solvent, resulting in a transparent colloid. Using this method, it was possible to obtain the TiO(2) nanocrystal with Brønsted acid sites and polymer chains chemically anchored on the nanocrystal surface. The acid surface of those nanocrystals has the chemical property to react in the presence of amine organic compounds and to maintain the colloidal stability. In this way, TiO(2) nanocrystals were combined with a molecular probe containing amine functional groups such as polyaniline. Through the combination of the molecular probe and inorganic nanocrystals, we obtained a hybrid material with interesting chemical, optical, and electronic behavior, making it a promising material for photovoltaic, photochromic, and sensor devices.

Spectroscopic Studies of Nano Size Crystalline Conducting Polyaniline

“…The Fourier transform infrared spectra [ Fig. 4.1] of Polyaniline nanofibers are also consistent with the existing literature with strong bands at around 1558 and 14690 cm -1 corresponds to Benzenoid and Quinoid rings and the remaining bands assigned to their respective functional groups [5] as shown in Table 1.…”

Highly Robust Hybrid Photocatalyst for Carbon Dioxide Reduction: Tuning and Optimization of Catalytic Activities of Dye/TiO2/Re(I) Organic–Inorganic Ternary Systems

“…The low value is primarily due to extensive light scattering in the opaque particle dispersion systems, which inevitably results in a poor light-harvesting efficiency. This optical drawback might be overcome, at least in part, by applying a transparent sol solution [93][94][95] or nanoparticle film of TiO2 loaded with a dye and a catalyst. Another reason for the low AQY would be due to the complex chemical processes involving the "slow" coordination of CO2 to the 17-electron species.…”

Structural, optical, and magnetic study of Ni-doped TiO2 nanoparticles synthesized by sol–gel method

“…There exist various methods of producing titania nanoparticles, such as sol-gel process, electrochemical coating, hydrothermal process, hydrolysis, microemulsion method, thermolysis, flame aerosol process, chemical vapor deposition, etc. [27][28][29][30][31][32][33][34][35]. Sol-gel method is often employed as it offers the advantages such as precise control over the stoichiometry, low-temperature synthesis, high crystallinity, and high purity [36][37][38].…”