摘要
利用动态尿素水解法制备了3种不同比例的ZnAlTi型层状双氢氧化物,取部分样品分别在温度为500、600、700和900℃条件下煅烧4h,制得具有光催化性能的材料。研究催化剂不同摩尔比、催化剂用量、煅烧温度等不同因素对光催化降解亚甲基蓝过程的影响。结果表明,紫外光照射下,在反应温度为30℃、催化剂中Ti和Al的摩尔比为2、催化剂投加浓度为1.0g/L、亚甲基蓝初始浓度为10mg/L、煅烧温度为600℃的反应条件下,催化剂对亚甲基蓝的降解效果最好,光照反应12h后亚甲基蓝的降解率为94.4%。
ZnA1Ti layered double hydroxides （LDHs） with different Zn ： AI ： Ti ratio were synthesized by dy-namic urea hydrolysis method. Part of these samples were calcined at 500, 600, 700 and 900 ℃, respectively tor 4h, obtaining calcined photocatalysts ZnA1Ti-LDHs. The effects of experimental parameters such as the differ- ent molar ratio of catalyst, catalyst dose, and calcination temperature on the photocatalytic degradation of methylene blue （MB） process were evaluated in detail. The results showed that under the conditions of reaction temperature at 30℃, Ti ： A1 molar ratio of 2： 1, 1.0 g/L catalyst loading, 10 mg/L initial MB concentration within 12h UV-light irradiation, 94.4% degradation rate of MB was obtained.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2012年第20期2799-2803,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(41073058
40973075)
广东省科技计划资助项目(2006B36601004
2008B30302036)
高等学校博士学科点专项科研基金资助项目(20100172110028)
关键词
层状双氢氧化物
动态尿素水解法
亚甲基蓝
光催化
layered double hydroxides
dynamic urea hydrolysis method
methylene blue
photocatalysis
