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Nonstoichiometric Bi2O2.33 nanoplates have been prepared using electrodeposition method on the surface of metal Bismuth.The Bi2O2.33nanoplates were specified in the thickness of 10~20 nm and the average inplane size of 100~200 nm by controlling the parameters of electrodeposition.The band gap of nano clusters Bi2O2.33 nanoplates was about 3.26 eV.