2. Experimental. All reagents are of analytical grade without further purification. Zinc chlorid (ZnCl2), sodium hydroxide (NaOH) and sodium dodecyl sulfate were dissolved in the distilled water, respectively, to get a 1.0, 4.0 and 0.2 M standard solution. 30 mL o NaOH followed by 5 mL of SDS solution was added dropwise into 20 mLofZncl solu- tion diluted with additional 45 mL of distilled water under vigorous stirring at 3 C which resulted in a 100 mL clear solution (IZn2 0.2 M, IOH-1 1.2 M; molar ratio of Zn2 /OH- 1:6). Then the above solution was maintained at room temperature (20-25°C) with mild continuous stirring for 1-2 h and subsequently transferred to a 250 mL ground-glass stoppered conical flask, aging at 85 C for 5h. After the reac tion, the white products were harvested and thoroughly washed with distilled water Finally, the Zno powders were obtained after drying in air at ambient temperature An X-ray diffraction (XRD) study was firstly carried out using a Bruker AXS D8 ADVANCEX-ray diffractometer (with Cu Ko radiation at 40 kVand 40 mA). The crys tal structures of the products were further characterized by field emission scanning electron microscopy (FESEM: JEOLJSM-6700F and HITACHI S-4800), transmission electron microscopy (TEM: HITACHI H-9000) and high-resolution TEM equipped