Solvent-Free Low-Temperature Annealing Method For Aqueous Stable Perovskite Nanofibers And Its Role In Peroxide Catalysis

One-dimensional nanofibers are among the most intriguing and desirable structures in nanomaterials. We report a solid-state green synthesis method for metal-oxide perovskite nanofibers (PNFs). A two-step low-temperature annealing method was optimized to obtain aqueous stable near-infrared- emitting Ce4.0Eu5.1Mo9.2Ox PNFs, with similar to 100 nm of thickness and length up to several microns. The as-synthesized PNFs were employed to study the catalysis of hydrogen peroxide (H2O2) using cyclic voltammetry. Further to this, longer incubation of H2O2 and PNFs resulted in structural modification, leading to fluorescence quenching of PNFs. The limit of detection of H2O2 was calculated to be 43 nM with R-2 = 0.9836 in solution. The chemical composition of the PNFs, as well as the structural integrity in an aqueous medium, can be implemented in a wide range of applications such as energy storage and biosensors.