Photo-Fenton Process over an Fe-Free 3%-CuO/Sr0.76Ce0.16WO4 Photocatalyst under Simulated Sunlight

Fu, Mingyan; Yang, Jia; Sun, Xiaorui; Tian, Wei; Yin, Guihua; Sheng, Tian; Tan, Mingdan; Liu, Hongfu; Xing, Xiaofeng; Huang, Huisheng

doi:10.1021/acsomega.1c04107

Cited by 4 publications

(1 citation statement)

References 40 publications

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“…This result is consistent with the high level of FLO degradation obtained with these nanoparticles, demonstrating that the incorporation of Pd into the nanoparticle structure, in addition to the promotion of electronic transfer between metals, also helps generate other radicals that make the reaction mechanism more efficient. , Finally, the effect of EDTA (holes) was assessed. It was determined that the presence of EDTA as a quenching agent affects the degradation capacity of Fe 2 O 3 -Ni-Pd, and it was also observed that, only in this case, photogenerated holes can oxidize water to form hydroxyl radicals or directly oxidize FLO, making the Fenton reaction more favorable. This result is consistent with the experiment without a quenching agent or kinetic results in which Fe 2 O 3 -Ni-Pd shows a 100% of degradation at 5 min.…”

Section: Resultsmentioning

confidence: 99%

Pd-Based Nanoparticles as Catalysts for Improved Removal of Florfenicol via Heterogeneous Fenton and Photo-Fenton(-like) Processes

Sepúlveda

Campos

Calzadilla

et al. 2023

ACS Appl. Nano Mater.

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In this work, Fe 2 O 3 -Ni, Fe 2 O 3 -Ni-Pd, MgO-Ni, and MgO-Ni-Pd nanoparticles were synthesized, characterized, and used for the degradation of florfenicol (FLO). The main goals were to compare the removal capacity of Fe 2 O 3 -Ni and MgO-Ni nanocatalysts and evaluate the effect of Pd incorporation on Fe 2 O 3 -Ni and MgO-Ni nanoparticles on the degradation of FLO by heterogeneous Fenton(-like) and photo-Fenton(-like) processes. The adsorption and degradation processes of FLO were assessed, determining that the latter process is the principal mechanism for FLO degradation. Through the heterogeneous photo-Fenton process, the antibiotic was 78 and 44% removed using the Fe 2 O 3 -Ni and MgO-Ni nanocatalyst, respectively, improving degradation by 22% when Pd is incorporated into both nanostructures. FLO degradation occurs because of the generation of hydroxyl and superoxide radical and holes in the interface and the Fenton reaction with Fe and Mg present in the nanoparticles. Finally, the main organic intermediates produced during the degradation were identified, allowing the proposal of a degradation pathway. Thus, heterogeneous Fenton(-like) and photo-Fenton(-like) processes using nanoparticles as solid phase catalysts are an excellent alternative to FLO degradation from water, especially considering the easy recovery of the nanoparticles through a simple separation process such as filtration.

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Section: Resultsmentioning

confidence: 99%