A sustainable and nondestructive method to high-throughput decolor Lycium barbarum L. polysaccharides by graphene-based nano-decoloration. (15th February 2021)

• Record Type: Journal Article
• Authors: Shi, Shuo; Zhang, Wentao; Liu, Xinnan; Ren, Xinyi; Li, Min; Sun, Jing; Wang, Yutang; Yue, Tianli; Wang, Jianlong
• Is Part Of: Food chemistry. Volume 338(2021)
• Publication Date: 2021-02-15
• Subjects: Graphene-based nanomaterials -- Nano-decoloration -- Nondestructive -- Lycium barbarum L. polysaccharides -- Sustainable; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2020.127749
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: A novel nano-strategy for LBPs decoloration is proposed. Compared with conventional method, the nano-strategy is mild and chemical free. The strategy is structurally and functionally nondestructive to LBPs. The strategy is flexibility to decolor other plant polysaccharides. Abstract: Lycium barbarum L. polysaccharides (LBPs) with outstanding biological activities are of increasing interest. Traditional purification approaches are time-consuming and often involve toxic solvents that destroy the functionality and structure of polysaccharides. Herein, we report a sustainable and nondestructive strategy for purifying LBPs using graphene-based nano-decoloration. The amination of graphene oxide (GO) enables the resulted aminated reduced GO (NH2 -rGO) with abundant sp 2 -hybridized carbon domains, displaying high adsorption capacity toward pigments in crude polysaccharides. As such, within 5 min, NH2 -rGO can highly effectively and fast to decolor LBPs, with a high decoloration ratio of 98.72% and a high polysaccharides retention ratio of 95.62%. Importantly, compared with traditional decoloration methods, NH2 -rGO is nondestructive toward LBPs and has good reusability. Moreover, it exhibited widespread-use decoloration performance to decolor several common plant species. Overall, our proposed nano-decoloration approach is a general-purpose, sustainable, and nondestructive method to purify LBPs.