摘要
以嵌段共聚体P123为结构导向剂,乙醇为溶剂,溶剂热合成了粒径在微米级的锐钛矿介孔氧化钛。利用透射电镜(TEM)、N2吸附、X射线衍射(XRD)和扫描电子显微镜(SEM)等表征手段研究了晶化时间和前驱物配比对合成产物孔结构和结晶状态的影响。所得的锐钛矿氧化钛晶粒具有较大的比表面积和纳米级孔道结构。以此产品作为光催化剂对二氯苯酚具有较强的光催化效果。在低浓度原料配比下,150℃晶化10d得到的介孔氧化钛具有接近于商业化纳米氧化钛P25的降解能力。
Mesoporous anatase titania was synthesized by ethanol solvothermal method with block copolymer P123 as structure directing agent. The effects of crystallization time and ratio of materials on pore and crystallite structure were studied by transmission electron microscope （TEM）, N2 sorption, X-ray diffraction （XRD） and scanning electron microscope （SEM）. The samples with large surface areas and nano-scale pores exhibited high activity on photocatalyzed degradation of 2, 4-chlorophenol （2, 4-DCP）, However, the photocatalysis efficiency of the catalyst crystallized under the low compositional concentrations, at 150℃ for 10d was a little lower than commercial TiO2 nano-powder P25.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第4期627-630,共4页
Journal of Materials Science and Engineering
关键词
介孔氧化钛
溶剂热
光降解
2
4-二氯苯酚
mesoporous titania
solvent-thermal
2, 4-dicholorophenal
photocatalytic degradation
