New insights into optical properties, and applications of Zr-doped BaTiO3

Abstract

The present work scrutinizes a few uses of barium titanate BaTi1–xZrxO3 (0.0 ≤ x ≤ 0.3) nanoparticles, which are an innovative and highly promising material for a variety of applications, including optical applications; and waste water treatment. To estimate the quality of a synthesized powder relative to an already existing commercial powder, the samples were prepared using cheaper raw materials and simpler, faster procedures than those reported in other literature at lower annealing durations and temperatures. The prepared samples were characterized by field emission scanning electron microscopy (FESEM), and Raman spectroscopy, which confirmed the coarse nature of the samples and the system's tetragonality. Furthermore, UV–visible absorbance of all compositions was studied. It has been determined that optical transition is directly allowed after extensive research, and the optical band gap (Eg) values increase with increasing (Zr4+) ion concentration. The derivation of absorption spectrum fitting (DASF) technique was used to support the type of transition and calculate the value of the coefficient of electronic transition (n). Samples can perform overall water splitting and CO2 reduction processes. The Langmuir and Freundlich isotherms were used to comprehend the procedure of adsorption on the investigated samples. The BaTi0.8Zr0.2O3 has been used to successfully remove 99.9% of heavy metals (Cr6+) from wastewater. The obtained results provide new insights into the control of the structure, and optical behaviors in BaTi1–xZrxO3.

Evaluation of the optical and magnetic properties of novel Nd0.9Zn0.1FeO3 perovskite nanoparticles and their adsorption of Pb2+ ions from water

“…The adsorption process is affected by many parameters, such as contact time, the surface area of the nanoparticles, the porosity of the samples, the pH value, and the function groups on the surface of the adsorbent materials. The good adsorbent materials of heavy metals are characterized by their thermal stability, such as zeolites 11 , graphene 12 , activated carbon 13 , zero-valent iron 14 , agricultural waste 15 , magnetic materials 16 , 17 , ZnO 18 , chitosan derivatives 19 – 22 , BaTi 0.8 Zr 0.2 O 3 23 , and pectin‑ based biohydrogels 24 . Also, ferrite materials have received great attention from scientists for the removal of HMs from water 25 , 26 due to their properties, such as being easy to prepare, thermal stability, and magnetic properties, which allow them to be extracted from the water by an external magnet and regenerated another time.…”