CeO2-Based Porous Carbonaceous Frameworks as Antioxidant Nanozymes for Scavenging Reactive Oxygen Species and Adsorbing Benzo[a]pyrene

Huimin Zhong; Cong Jiang; Jiahui Zou; Guancheng Zhu; Yanyan Huang

doi:10.1021/acs.inorgchem.3c02145

CeO₂-Based Porous Carbonaceous Frameworks as Antioxidant Nanozymes for Scavenging Reactive Oxygen Species and Adsorbing Benzo[a]pyrene

Inorg Chem. 2023 Aug 21;62(33):13168-13172. doi: 10.1021/acs.inorgchem.3c02145. Epub 2023 Aug 9.

Authors

Huimin Zhong¹, Cong Jiang¹, Jiahui Zou¹, Guancheng Zhu¹, Yanyan Huang¹

Affiliation

¹ College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.

PMID: 37555763
DOI: 10.1021/acs.inorgchem.3c02145

Abstract

Barbecue smoke, car exhaust, cigarette smoke, and other waste gases contain toxic reactive oxygen species (ROS) and polycyclic aromatic hydrocarbons (PAHs). Herein, CeO₂-based porous carbonaceous frameworks (CeO₂ PCFs) were explored as antioxidant nanozymes to scavenge ROS and absorb benzo[a]pyrene (B[a]P). Using cerium-based frameworks as the precursors, CeO₂ PCFs were constructed by high-temperature calcination. Due to excellent superoxide dismutase-like and catalase-like activity, CeO₂ PCFs could effectively eliminate superoxide radical, hydroxyl radical, and hydrogen peroxide. The 2,2'-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) free radical scavenging assay had substantiated free radical scavenging ability of CeO₂ PCFs. In addition, with a large surface area and porous structure, CeO₂ PCFs could adsorb B[a]P efficiently. The designed CeO₂ PCFs may provide a new opportunity as scavengers of ROS and absorbents of PAHs in some harmful gases.