An apparatus (20) for making nanopowder includes a reaction chamber (22),
a first sprayer (25, 27), a second sprayer (26, 28) and a centrifuge
(24). The reaction chamber includes a top portion (224); a bottom portion
(227) opposite to the top portion; a peripheral sidewall (220, 223)
interconnecting the top portion and the bottom portion; an inlet (222)
formed in the top portion configured for introducing a solvent; and an
outlet (229) formed in the bottom portion. The first sprayer is formed on
the peripheral sidewall of the reaction chamber configured for spraying a
first reactant into the reaction chamber. The second sprayer is formed in
at least one of the top and bottom portions of the reaction chamber
configured for spraying a second reactant into the reaction chamber. The
centrifuge is connected with the outlet of the reaction chamber.