Mini-review: Ferrite nanoparticles in the catalysis

https://ddd.uab.cat/pub/artpub/2018/233375/36-Piezoelectrically_Enhanced_Photocatalysis_with.pdf

Piezoelectrically enhanced photocatalysis with BiFeO3 nanostructures for efficient water remediation

Epitaxial c-axis oriented BiFeO3 (BFO) thin films were deposited on (001) Nb-doped SrTiO3 (Nb-STO) substrates by pulsed laser deposition. Introducing Bi vacancies caused the BFO thin film to evolve to a p-type semiconductor and formed a p-n heterojunction with an n-type semiconductor Nb-STO. The current density versus voltage (J-V) and capacitance versus voltage (C-V) characteristics of the heterojunction were investigated. A typical rectifying J-V effect was observed with a large rectifying ratio of 5×104. Reverse C-V characteristics exhibited a linear 1∕C2 versus V plot, from which a built-in potential of 0.6V was deduced. The results show a potential application of BFO/Nb-STO heterojunction for oxide electronics.

http://absimage.aps.org/image/MAR08/MWS_MAR08-2007-000520.pdf

Rectifying Current-Voltage Characteristics of BiFeO$_{3}$/Nb-doped SrTiO$_{3}$ Heterojunction

A newly emerging visible light-responsive BiFeO3 perovskite for photocatalytic applications: A mini review

Strategies for improving perovskite photocatalysts reactivity for organic pollutants degradation: A review on recent progress

We have developed a unique plasmonic multiferroic photocatalyst by integrating silver nanoparticles (Ag NPs) with multiferroic bismuth ferrite (BiFeO3–BFO) particulate and fiber nanostructures, and it showed a remarkable photocatalytic enhancement under direct sunlight. Sol–gel and electrospinning methods were employed to fabricate these nanostructures, and a modified chemical reduction method was formulated to decorate Ag NPs for an effective plasmon sensitization process. The observed redshift and wide optical absorption profile of plasmonic BFO nanostructures showed promise for enhanced absorption in visible light. The photocatalytic activity of these nanostructures was tested on the degradation of methylene blue under the irradiation of direct sunlight. Ag NPs-decorated BFO particulates and fibers significantly shortened the photocatalytic degradation by 2 h as compared to their parent BFO nanostructures. The observed phenomenon was attributed to a synergistic effect, wherein the localized surface plasmon resonance of Ag NPs augmented the sunlight absorption and trapped the excited carriers. These sensitized Ag NPs then facilitated the transportation of the charge carriers to the catalyst–dye interface, leading to a rapid generation of redox species that increased the degradation rate under sunlight irradiation.

A prototypical development of plasmonic multiferroic bismuth ferrite particulate and fiber nanostructures and their remarkable photocatalytic activity under sunlight

Ganesamoorthy Sarveswaran

Papers

A prototypical development of plasmonic multiferroic bismuth ferrite particulate and fiber nanostructures and their remarkable photocatalytic activity under sunlight