Abstract: This paper presented a two-step method to prepare sheet nano-zinc oxide single crystals(SNOSC).The precursor of SNOSC was first made by homogeneous precipitation method (HPM), using zinc chloride and alkali zinc carbonate as the raw materials and carbamide as the precipitant. Then the SNOSC was obtained by the thermal decomposition of the precursor. The prepared SNOSC is colorless and transparent with a hexagonal, pentagonal, rectangular or an irregular form, as examined by IR spectra and SEM. The single crystal is 30-600μm in diameter and 30-60nm in thickness . The important factors to the preparation are the ratio of reaction materials, the concentration of carbamide (1:) and the reaction temperature (70-85℃). In addition, the content of ethanol ranging 10;-40; appears favorable for the formation of the precursor of SNOSC.

Key words: This paper presented a two-step method to prepare sheet nano-zinc oxide single crystals(SNOSC).The precursor of SNOSC was first made by homogeneous precipitation method (HPM), using zinc chloride and alkali zinc carbonate as the raw materials and carbamide as the precipitant. Then the SNOSC was obtained by the thermal decomposition of the precursor. The prepared SNOSC is colorless and transparent with a hexagonal, pentagonal, rectangular or an irregular form, as examined by IR spectra and SEM. The single crystal is 30-600μm in diameter and 30-60nm in thickness . The important factors to the preparation are the ratio of reaction materials, the concentration of carbamide (1:) and the reaction temperature (70-85℃). In addition, the content of ethanol ranging 10;-40; appears favorable for the formation of the precursor of SNOSC.