Table 2.

Examples of multi-enzyme immobilization systems based on CNTs.

Materials	Model enzymes	Applications	Types of multi-immobilization	References
Amino-modified SWCNTs	Glycerol dehydrogenase and NADH oxidase	Preparation of 4-hydroxy-2-butanone from 1,3-butanediol	Random co-immobilization	Wang et al., 2012
MWCNTs	GOx and HRP	Detection of glucose	Random co-immobilization	Huang et al., 2013
MWCNTs	Glucoamylase and GOx	Detection of starch	Random co-immobilization	Lang et al., 2014
MWCNTs	Salicylate hydroxylase and tyrosinase	Detection of methyl salicylate	Random co-immobilization	Fang et al., 2016
CNT Columns	Hydrogenase, NAD+ reductase and dehydrogenase	Preparation of L-alanine/(S)-1-phenylethanol from pyruvate/acetophenone	Random co-immobilization	Zor et al., 2017