Controlled synthesis of Cu2O cubic and octahedral nano- and microcrystals

✍ Scribed by Zhenghua Wang; Hui Wang; Lingling Wang; Ling Pan

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 166 KB
• Volume: 44
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200900136

✦ Synopsis

Cubic and octahedral Cu 2 O nano-and microcrystals were selectively synthesized via a simple wet chemical reduction route at room temperature, with CuCl 2 and NaOH as starting reactants, and ascorbic acid or hydrazine hydrate as the reducer. Hydrazine hydrate could be preferentially adsorbed on different crystal faces of Cu 2 O, affecting the growth rate along the 〈100〉 to that along the 〈111〉 direction, which resulted in the formation of octahedral Cu 2 O crystals. When ascorbic acid was used as the reducer, the growth rate along the 〈100〉 to that along the 〈111〉 direction was different, which resulted in the formation of cubic Cu 2 O crystals. The size of cubic and octahedral Cu 2 O crystals could be varied by adjusting the molar ratio of OH -to Cu 2+ .