Table 1.

Examples of multi-enzyme immobilization systems based on graphene and its derivatives.

Materials	Model enzymes	Applications	Types of multi-immobilization	References
Chemically reduced graphene oxide	GOx and glucoamylase	Preparation of gluconic acid from starch	Random co-immobilization	Zhao et al., 2014
Reduced graphene oxide–dendritic Pd nanoparticles	Cholesterol oxidase and cholesterol esterase	Detection of cholesterol	Random co-immobilization	Dey and Raj, 2014
Graphene oxide	GOx and HRP	Preparation of gluconic acid from glucose	Random co-immobilization	Zore et al., 2015
Chemically reduced graphene oxide	GOx and HRP	Preparation of gluconic acid from glucose	Random co-immobilization	Mathesh et al., 2017
Luminol functionalized graphene oxide	GOx and HRP	Detection of glucose	Random co-immobilization	Li et al., 2018
Hydroxyl and carboxyl modified graphene oxide	Cellulase and GOx	Preparation of gluconic acid from carboxymethyl cellulose	Random co-immobilization	Zhang et al., 2020