Cu_(2)O微/纳米晶可控制备及其光催化性能

Controllable Preparation of Cu_(2)O Micro/Nanocrystals and Their Potocatalytic Properties

常温下,以水合肼(N_(2)H_(4)·H_(2)O)为还原剂,CuSO4·5H_(2)O为铜源,采用液相还原法成功制备出了两种形态氧化亚铜(Cu_(2)O)微/纳米晶。研究结果表明,当水合肼用量为0.25-1.5mL,反应时间为10-15min时,可获得质量较高的Cu_(2)O微纳米线,其平均直径约为60nm,长度可达十几μm。当其它实验条件(Cu^(2+)浓度、NaOH浓度和水合肼用量)不变,反应时间延长至30min以内可获得Cu_(2)O八面体微晶。光催化实验结果进一步表明,Cu_(2)O微纳米线的可见光催化性能优于Cu_(2)O八面体微晶,其降解率可达98%。该制备方法操作简单、效率高,可用于宏量合成Cu_(2)O纳米材料。

At room temperature,cuprous oxide(Cu_(2)O)micro/nanocrystals with different shapes were successfully prepared by a liquid phase reduction method using hydrazine hydrate(N_(2)H_(4)·H_(2)O)as a re⁃ducing agent,CuSO4·5H_(2)O as a copper source.The results show that when the amount of N_(2)H_(4)·H_(2)O is 0.25-1.5mL and the reaction time is 10-15min,high quality Cu_(2)O micro/nanocrystals can be ob⁃tained,with an average diameter of about 60nm and a length of up to tenμm.When other experimen⁃tal conditions(Cu^(2+)concentration,NaOH concentration and N_(2)H_(4)·H_(2)O dosage)were kept constant,Cu_(2)O octahedral microcrystals can be obtained when the reaction time is extended to less than 30min.The results of photocatalysis experiments further showed that,the visible photocatalytic performance of Cu_(2)O micro-nanowires is better than that of Cu_(2)O octahedral microcrystals,the degradation rate of Cu_(2)O micro-nanowires can reach 98%.The preparation method is facile and efficient,and can be used for macro synthesis of Cu_(2)O nanomaterials.