摘要
采用'牺牲'金属阳极溶解法在乙醇和乙酰丙酮混合溶液中,先加入0.12 g锂片,在所得溶液中恒流为0.2 A电解钛片6 h,制得复合氧化物纳米粉体Li4Ti5O12的前驱体Li4Ti5(OEt)(24-n(acac)n[acac为乙酰丙酮基].产物通过红外光谱(FT IR)、X射线衍射(XRD)、电子透射显微镜(TEM)进行表征.实验表明,电解温度控制在35～40℃、导电盐Bu4NBr浓度为0.040～0.045mol/L之间电流效率达到90%左右;在温度为40℃、浓度为0.2 mol/L、pH=8.5时进行水解,产率为89%,水解后的干凝胶粒径10～15 nm.
0. 120 g Li slice was put into an ethanol and acetyl-acetone solution and the precursor Li4Ti5 （ OEt）24-n（acac）, of the nano-oxide powder Li4 Ti5O12 was prepared by electrochemical dissolution of titanium for 6 h with a current of 0.2 A. The product was characterized by FT [R, XRD and TEM. Experimental results showed temperature between 35- 40 ℃ and adding 0.040 - 0.045 mol/L Bu4 NBr as conductive additive can enhance the current efficiency to 90% .The precursor of 0.2 mol/L was hydrolyzed at 40 ℃ and pH = 8.5, and the yield was 89%. The xerogel powder made from the precursor has a narrow size distribution of 10 - 15 nm.
出处
《化学世界》
CAS
CSCD
北大核心
2005年第8期453-457,共5页
Chemical World
基金
安徽省高校青年教师科研资助计划(2004jq185)
