Ag/AgFeO₂: An Outstanding Magnetically Responsive Photocatalyst for HeLa Cell Eradication

Abstract

A superfast, room-temperature, one-step carrier-solvent-assisted interfacial reaction process was developed to prepare Ag/AgFeO2 composite nanocrystals (NCs) of less than 10 nm in size within a 1 min reaction time. These composite NCs were with a direct energy band gap of 2.0 eV and were paramagnetic, making them suitable for optical activation and magnetic manipulation. These composite NCs, applied as a photocatalyst for the treatment of HeLa cells, achieved a significant reduction of 74% in cell viability within 30 min. These Ag/AgFeO2 composite NCs proved to be a promising magnetically guidable photocatalyst for cancer cell treatment.

High-Pressure Polymorphism in Silver Ferrite Delafossite, AgFeO2

“…15 magnetically guidable photocatalysts for the production of reactive oxygen species within cancer cells. 16 Pressure is a powerful tool for smoothly modulating crystal structure to fine-tune structure-dependent properties and in many cases can be used to directly access different polymorphs with altered crystal symmetry and atomic connectivity. Although the copper delafossite systems have been well studied under pressure, 17−23 comparatively fewer studies have been carried out on the silver delafossites, and to date, only AgGaO 2 has been investigated with pressure.…”

“…This compound has been investigated for a range of potential applications, including as a cathode material in lithium-ion batteries, as nontoxic and biocompatible semiconductor nanoparticles, as components in solar energy conversion, and as a host for multiferroic behavior . Nanoparticles of AgFeO 2 , which have a direct band gap of 2.0 eV, have also been investigated as magnetically guidable photocatalysts for the production of reactive oxygen species within cancer cells …”

Facile Synthesis of AgFeO2‐Decorated CaCO3 with Enhanced Catalytic Activity in Activation of Peroxymonosulfate for Efficient Degradation of Organic Pollutants

“…Silver ferrite (AgFeO 2 ), a member of the delafossite family, has received immense attention in the research fields of sensor, energy storage, electrochemistry, antibiosis, and photocatalysis because of its nontoxic nature, unique electronic structure, and magnetic properties. [ 17–20 ] Recently, AgFeO 2 has been established as a highly efficient PMS activator for degrading Orange I in water with decent recycling performance. The high 2H‐AgFeO 2 content in AgFeO 2 , as well as the electron transfer of Ag(0)/Ag(I) and Fe(II)/Fe(III) cycles, accelerates the utilization of PMS, thereby contributing to its high catalytic ability.…”