A novel g-C3N4-SH@konjac glucomannan composite aerogel for patulin removal from apple juice and its photocatalytic regeneration

Yue Qiu; Jiaping Yan; Xiaoling Liu; Yuting Pang; Yuting Ding; Fei Lyu

doi:10.1016/j.foodchem.2024.139421

A novel g-C₃N₄-SH@konjac glucomannan composite aerogel for patulin removal from apple juice and its photocatalytic regeneration

Food Chem. 2024 Apr 19:451:139421. doi: 10.1016/j.foodchem.2024.139421. Online ahead of print.

Authors

Yue Qiu¹, Jiaping Yan¹, Xiaoling Liu¹, Yuting Pang¹, Yuting Ding¹, Fei Lyu²

Affiliations

¹ College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, China.
² College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, China. Electronic address: foodsensory@126.com.

PMID: 38663244
DOI: 10.1016/j.foodchem.2024.139421

Abstract

Patulin (PAT) is a hazardous mycotoxin frequently occurs in fruit industry. A reusable g-C₃N₄-SH@KG composite aerogel for PAT removal in a novel "dark adsorption-light regeneration" mode was prepared by thiol(-SH) functionalization and konjac glucomannan (KG) immobilization. The g-C₃N₄-SH@KG was characterized by SEM, FT-IR, XPS and UV-Vis DRS, and its PAT adsorption and photocatalytic regeneration behaviors and mechanisms were investigated. The g-C₃N₄-SH@KG exhibited good regeneration performance, maintaining 83% of PAT initial adsorption capacity (0.92 mg/g) after 5 "adsorption-regeneration" cycles. The adsorption process was endothermic and spontaneous. •OH and h⁺ generated by photocatalysis were the main substances that degraded PAT into two products and regenerated -SH. The g-C₃N₄-SH@KG could effectively remove PAT without negative impact on juice quality. The study provided a new strategy for the regeneration of thiol-functionalized PAT adsorbents, and a new idea for the application of non-selective photocatalysis in the control of food contaminations.

Keywords: Graphitic carbon nitride; Konjac aerogel; Patulin; Photocatalysis.