Preparation method and application of high-hydrophobicity aluminum-based composite material

The invention discloses a preparation method and application of a high-hydrophobicity aluminum-based composite material. The preparation method comprises the following steps: (1) carrying out acid soaking, washing, drying and chambering roasting on activated carbon to obtain chambered activated carbon; (2) adding the pore-expanded activated carbon, a hydrothermal solvent, a pH regulator and an auxiliary metal salt into an aluminum salt solution, and carrying out a microwave hydrothermal reaction; (3) after the reaction is finished, washing and filtering to obtain a composite material precursor; (4) roasting the composite material precursor obtained in the step (3) in a microwave environment to obtain a composite material; the mass ratio of aluminum atoms in the aluminum salt to the activated carbon is (2: 1)-(1: 2); and the mass of the assistant metal salt is 9.5-38% of the mass of aluminum atoms in the aluminum salt. The alkylanthraquinone hydrogenation palladium catalyst prepared by using the high-hydrophob