Structural regulatory mechanism of phosphotungstate acid decorated graphene oxide quantum dots-chitosan aerogel and its application in ciprofloxacin degradation

Pingping Li; Zhen Wang; Shaocong Yang; Gaojin Lyu; Yawei Gu; Jiachuan Chen; Guihua Yang

doi:10.1016/j.ijbiomac.2023.125137

Structural regulatory mechanism of phosphotungstate acid decorated graphene oxide quantum dots-chitosan aerogel and its application in ciprofloxacin degradation

Int J Biol Macromol. 2023 Jul 1;242(Pt 4):125137. doi: 10.1016/j.ijbiomac.2023.125137. Epub 2023 Jun 3.

Authors

Pingping Li¹, Zhen Wang², Shaocong Yang¹, Gaojin Lyu¹, Yawei Gu¹, Jiachuan Chen¹, Guihua Yang¹

Affiliations

¹ State Key Laboratory of Biobased Material and Green Papermaking, School of Environmental Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, PR China.
² State Key Laboratory of Biobased Material and Green Papermaking, School of Environmental Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, PR China. Electronic address: wz@qlu.edu.cn.

PMID: 37276907
DOI: 10.1016/j.ijbiomac.2023.125137

Abstract

Chitosan modified AGQD (amine modified graphene oxide quantum dots) and then combined with H₃PW₁₂O₄₀ to obtain CS_x@AGQD-HPW₁₂ via facile process and applied for CIP removal through pre-adsorption and photocatalytic processes. The application of chitosan could regulate the morphology and photoelectric properties effectively. CS_0.5@AGQD-HPW₁₂ was found to have the optimal CIP removal performance among all the products, the corresponding adsorption removal efficiency and pre-adsorption photocatalysis process were 72.1 % and 98.8 %, respectively. Results of toxicity assessment confirmed photocatalytic degradation process could mitigate the ecotoxicity of CIP effectively. The optimal TOC (total organic carbon) removal efficiency was about 52.1 %. Possible pathways for CIP degradation and reaction mechanism were proposed based on the results of intermediates analysis and trapping experiments. This demonstrated a novel approach to chitosan application and an eco-friendly way to remove CIP by adsorption-photocatalysis process.

Keywords: Chitosan; Ciprofloxacin degradation; Graphene oxide quantum dots; Phosphotungstate acid; Pre-adsorption photocatalysis process.

MeSH terms

Adsorption
Anti-Bacterial Agents / chemistry
Chitosan* / chemistry
Ciprofloxacin / chemistry
Quantum Dots*
Water Pollutants, Chemical* / chemistry

Substances

Ciprofloxacin
Anti-Bacterial Agents
graphene oxide
Chitosan
Water Pollutants, Chemical