Microfluidic Assembly Synthesis of Magnetic TiO 2 @SiO 2 Hybrid Photonic Crystal Microspheres for Photocatalytic Degrada
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Microfluidic Assembly Synthesis of Magnetic TiO2@SiO2 Hybrid Photonic Crystal Microspheres for Photocatalytic Degradation of Deoxynivalenol Qianjin Li1 · Yang Deng1 · Shijie Dai1 · Yuxiang Wu2 · Wei Li3 · Siqi Zhuo1 · Saisai Jiao1 · Siwei Wang1 · Yu Jin1 · Jianlin Li1 Received: 22 September 2020 / Accepted: 26 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Mycotoxin contamination is a serious threat to food safety and human health. The development of efficient degradation strategies targeting mycotoxins is valuable. In this paper, magnetic T iO2@SiO2 hybrid photonic crystal microspheres (MHPCMs) were designed and prepared by the water-in-oil droplet method through a simple two-phase home-made microfluidic device for the degradation of deoxynivalenol (DON), the most serious mycotoxin contaminating cereals and feeding samples among natural mycotoxins. The morphologies of the synthesized microspheres were investigated by both metallurgical microscope and scanning electronic microscope (SEM), confirming that MHPCMs have a spherical shape and regular photonic crystal nanostructures. In the self-assembly system, TiO2 and Fe3O4 nanoparticles were responsible to form photocatalytic sites and magnet response, respectively. The effect of the T iO2 and F e3O4 contents in the microspheres on their morphology and photocatalytic degradation activity was studied in detail. Finally, the optimized MHPCM could degrade DON in water under the light irradiation and be recycled easily by magnet. Keywords Microfluidic synthesis · Self-assemble · Photocatalysis · Photonic crystal structure · Deoxynivalenol · Mycotoxin
1 Introduction Mycotoxins are toxic fungal metabolites, which can cause acute and chronic toxicity to humans and animals, and damage the tissues and organs by the accumulation effect in the body. Various food faced to the mycotoxins contamination, due to their worldwide existence and high stability to common degradation approaches [1]. So far, more than Qianjin Li, Yang Deng, Shijie Dai, Yuxiang Wu, and Wei Li have contributed to this work equally and should be regarded as co-first authors. * Jianlin Li [email protected]; [email protected] 1
School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
2
Shandong Lvdu Biotechnology Co. LTD, Shandong 256600, China
3
Department of Electronic and Electrical Engineering, The University of Sheffield, Sheffield S3 7HQ, UK
300 mycotoxins were identified and the main mycotoxins were aflatoxin B (AFB), zearalenone (ZEN), ochratoxin A (OTA), fumonisin B (FB), deoxynivalenol (DON), and other trichothecenes [2, 3]. DON was the most serious mycotoxin contaminating cereals and feeding samples, it was first found from the Gibberella contaminated barley in Japan, later found from Fusarium contaminated corn in the USA, and in the Europe it was usually found with its analogs which were 3-acetyl-DON (3-Ac-DON) and 15-acetyl-DON (15-AcDON), which showed high cell toxici
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