Journal
ACS APPLIED NANO MATERIALS
Volume 5, Issue 12, Pages 17956-17968Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c03926
Keywords
nanoceria; bismuth; photocatalysis; reactive adsorption; paraoxon methyl; bisphenol S; bisphenol A
Funding
- European Commission
- Formas
- ANR
- TACR [869178]
- Ministry of Education, Youth and Sports of the Czech Republic [LM2018124]
- MEYS [LM2018110]
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Nanoscale cerium-bismuth oxide/oxynitrate solid solutions and bismuth oxynitrate photocatalysts prepared by a low-temperature method exhibit excellent adsorption and photocatalytic degradation performance for organophosphates and endocrine disruptors, with low toxicity to organisms, making them promising for the abatement of toxic chemicals.
Nanoscale cerium-bismuth oxides/oxynitrates were prepared by a scalable low-temperature method at ambient pressure using water as the sole solvent. Solid solutions were formed up to a 1:1 Ce/Bi molar ratio, while at higher doping levels, bismuth oxynitrate photocatalysts with a pronounced layered structure were formed. Bismuth caused significant changes in the structure and surface properties of nanoceria, such as the formation of defects, oxygen-containing surface groups, and Lewis and Bronsted acid sites. The prepared bifunctional adsorbents/photocatalysts were efficient in the removal of toxic organophosphate (methyl paraoxon) from water by reactive adsorption followed by photocatalytic decomposition of the parent compound and its degradation product (p-nitrophenol). Bi-doped ceria also effectively adsorbed and photodegraded the endocrine disruptors bisphenols A and S and outperformed pure ceria and the P25 photocatalyst in terms of efficiency, durability, and long-term stability. The very low toxicity of Bi-nanoceria to mammalian cells, aquatic organisms, and bacteria has been demonstrated by comprehensive in vivo/in vitro testing, which, in addition to its simple green synthesis, high activity, and durability, makes Bi-doped ceria promising for safe use in abatement of toxic chemicals.
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