Synthesis of nanocomposite for green energy production

A method for synthesizing a MoO3@Al2O3—MgO nanocomposite material, comprising:

• adding distilled water and ammonium molybdate to a powder mixture of Al(NO3)3·9H2O, Mg(Ac)2·4H2O, and sucrose to form a reaction mixture;
• heating the reaction mixture to a reaction temperature in a range of 150° C. to 220° C. to form a carbonized product;
• grinding the carbonized product to form a ground carbonized product;
• and
• calcining the ground carbonized product at a temperature in a range of 700° C. to 800° C. for a period of 2 to 4 hours to form the MoO3@Al2O3—MgO nanocomposite material,
• wherein the MoO3 content of the MoO3@Al2O3—MgO nanocomposite material is in a range from 1 wt. % to 20 wt. % of the total weight of the MoO3@Al2O3—MgO nanocomposite material, and
• wherein the MoO3@Al2O3—MgO nanocomposite material has a hydrogen generation rate of greater than or equal to 400 mL·min−1·g−1 when used to generate hydrogen from NaBH4.