木质活性炭的光催化再生  

PHOTOCATALYTIC REGENERATION OF WOOD-BASED ACTIVATED CARBON

作　　者：刘守新[1] 张世润[2] 孙承林[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《林产化学与工业》2003年第2期12-16,共5页Chemistry and Industry of Forest Products

基　　金：中国博士后科学基金资助项目(2002032174)

摘　　要：　根据活性炭吸附机理,利用光催化氧化技术,研究了在主波长253.7nm紫外光辐射下,以锐钛型TiO2及在其表面沉积贵金属Ag的Ag TiO2为光催化剂,以亚甲基蓝为模型化合物,进行吸附饱和椰壳活性炭的光催化再生。系统研究了再生温度、催化剂活性、再生时间、活性炭粒度、再生次数、pH值对再生效果的影响。结果表明在较高再生温度50℃、较长再生时间72h条件下,再生率达到81%,可以实现木质椰壳活性炭的缓慢光催化再生。By using TiO2 and AgTiO2 as catalyst,253.7 nm UV as irradiation source,methylene blue as model compound,photocatalytic regeneration of woodbased activated carbons were investigated in photocatalyst suspension and loaded system.Main variables affecting regeneration efficiency were investigated,including activity of the photocatalyst,regeneration time,temperature,particle size of activated carbon,pH value and regeneration cycles.Result showed that under favorable condition,photocatalytic regeneration of woodbased activated carbon could be achieved.For 60-80 mesh carbon,the regeneration efficiency upto 81% can be obtained by regeneration at 50 ℃ for 72 h.

关 键 词：木质活性炭 光催化再生 吸附机理 光催化氧化 二氧化钛 亚甲基蓝 吸附剂 

分 类 号：TQ424.1[化学工程] O647.33[理学—物理化学]