The invention discloses a micro-bubble generator and a manufacturing method of the micro-bubble generator. The micro-bubble generator comprises a substrate, two double-layer
graphene electrodes and a carbon
nano tube. The two double-layer
graphene electrodes are located on the substrate, and the distance between the electrodes is 1-8 microns. The carbon
nano tube is connected with the two double-layer
graphene electrodes to serve as a heating
assembly. The manufacturing method includes the following steps that a
metal foil surface on which double-layer graphene grows is coated with PMMA in a
spinning mode;
metal foil is removed, the double-layer graphene protected by the PMMA is transferred to the substrate, and the double-layer graphene is tightly combined with the substrate through heat treatment; the PMMA is removed; an
oxygen plasma reaction is performed to etch the double-layer graphene, and the two double-layer graphene electrodes and a double-layer graphene nano belt connecting the two electrodes are obtained; annealing is performed under the vacuum conditions, so that the edge of the double-layer graphene nano belt is closed to form the carbon
nano tube, and the micro-bubble generator is manufactured. According to the micro-bubble generator and the manufacturing method of the micro-bubble generator,
power consumption of the micro-bubble generator is reduced, the service life of the micro-bubble generator is effectively prolonged, and the micro-bubble generator is simple in structure and flexible in design.