Semiconducting metal oxide nanoparticles (MONPs) have been an area of high interest to researchers due to vast tunable properties and reduced cost. Their structures and composition can be exploited in such a way to use visible light absorption for the photocatalytic abilities as well as enhancement of photochemical and photophysical properties. Upon absorption of visible light, the exciton created by the MONPs facilitates single electron transfer reactions to produce both holes and radical oxygen species (ROS) for degradation of pollutants. Adornment of the surface of MONPs with noble metal nanodomains, such as Palladium (Pd) greatly increase this activity. The photocatalyst BiVO<sub>4</sub>/BiOBr/Pd has demonstrated high catalytic activity in the breakdown of organic pollutants such as rhodamine B (RhB), methylene blue (MB), and methyl orange (MO). Photocatalytic experiments were used to collect data to calculate photophysical properties such as quantum efficiency. Recently, advances have been made with the same photocatalytic system in the degradation of organic munitions such as 2,4-dinitroanisole (DNAN), and nitroguanidine (NQ). The breakdown of munitions into intermediates and eventually final products, will give insight into reaction mechanism, thermodynamics, and kinetics. The synthesis, photocatalytic reactions, and photochemical/photophysical properties will be discussed.

Photocatalytic applications of palladium decorated BiVO4/BiOBr nanoparticles

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ACS Fall 2022

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