CoO-supported ordered mesoporous carbon nanocomposite based nanozyme with peroxidase-like activity for colorimetric detection of glucose

•Cobalt oxide supported ordered mesoporous carbon (CoO-OMC) facilely prepared.•CoO-OMC exhibited excellent peroxidase-like activity.•Coupled with glucose oxidase, a simple colorimetric glucose sensor developed.•The as-prepared sensor applicable to detect glucose in human serums accurately.