Lead-free organic-inorganic azetidinium alternating metal cation bromide: [(CH)NH]AgBiBr, a perovskite-related absorber.

In the last decade, organic-inorganic hybrid halide perovskite materials have developed into a very large research area in photovoltaics and optoelectronics as promising light harvesters. Lead-free double perovskites have recently been investigated as an environmentally friendly alternative to the lead-containing compositions. However, lead-free organic-inorganic hybrid halide double perovskites have so far rarely been produced due to a certain complexity in their synthesis.

Control of physical properties in BiFeOnanoparticles via Smand Coion doping.

Highly crystalline BiFeO(BFO), BiSmFeO(Sm-BFO) and BiFeCoO(Co-BFO) nanoparticles (NPs) were utilized as potential magnetic hyperthermia agents at two different frequencies in the radiofrequency (RF) range, and the effect of Smand Coion doping on the physical properties of the material was examined. The thermal behaviour of the as-prepared powders disclosed that the crystallization temperature of the powders is affected by the incorporation of the dopants into the BFO lattice and the Curie transition temperature is decreased upon doping. Vibrational analysis confirmed the formation of the R3c phase in all compounds through the characteristic FT-IR absorbance bands assigned to O-Fe-O bending vibration and Fe-O stretching of the octahedral FeOgroup in the perovskite, as well as through Raman spectroscopy.

Rare-earth doped BiFeMnO nanoparticles for potential hyperthermia applications.

Ionic engineering is exploited to substitute Bi cations in BiFeMnO NPs (BFM) with rare-earth (RE) elements (Nd, Gd, and Dy). The sol-gel synthesized RE-NPs are tested for their magnetic hyperthermia potential. RE-dopants alter the morphology of BFM NPs from elliptical to rectangular to irregular hexagonal for Nd, Gd, and Dy doping, respectively.

Role of cooperative factors in the photocatalytic activity of Ba and Mn doped BiFeO nanoparticles.

The escalated photocatalytic (PC) efficiency of the visible light absorber Ba-doped BiFeMnO (BFM) nanoparticles (NPs) as compared to BiFeO (BFO) NPs is reported for the degradation of the organic pollutants rhodamine B and methyl orange. 1 mol% Ba-doped-BFM NPs degrade both dyes within 60 and 25 minutes under UV + visible illumination, respectively. The Ba and Mn co-doping up to 5 mol% in BFO NPs increases the specific surface area, energy of d-d transitions, and PC efficiency of the BFO NPs.