在200℃,6h条件下水热制备两种掺锑二氧化钛,Sb2O3:TiO2介于0-0.35mol%.第一种以二氧化钛和SbCl3为原料;第二种以偏钛酸和SbCl3为原料.用XRD、SEM、EDS、TG、IR表征样品,谢乐公式估算晶粒直径.EDS检测到Sb2O3的存在,XRD检测表明掺锑TiO2均为锐钛型.锑的掺入可有效抑制第二种掺锑二氧化钛晶粒的长大.通过罗丹明B的光降解,表明两种掺锑纳米TiO2光活性均得到有效抑制.以偏钛酸为原料制得的掺锑TiO2 的光活性低于以二氧化钛为原料制得的掺锑TiO2.当Sb2O3:TiO2为0.21%时,掺锑二氧化钛光活性最低.
Two kinds of Sb2O3-doped TiO2(Sb2O3:TiO2=0～0.35mol%) nano-particles were synthesized
by the hydrothermal method at 200℃ for 6h. The first kind of Sb2O3-doped TiO2 was prepared by using titania and antimony trichloride as reactants.
The second kind of Sb2O3-doped TiO2 was prepared by using metatitanic acid and antimony trichloride as reactants. The Sb2O3-doped TiO2
powders were characterized by XRD, SEM, EDS, TG, IR and the diameter of the particles was evaluated by Scherrer equation. EDS characterization shows that
Sb2O3 exists in Sb2O3-doped TiO2. The crystallines of all samples are anatase in XRD patterns. The dopant of Sb2O3 can inhibit
the particle growth of the second kind of Sb2O3-doped TiO2 when the crystalline is changed into anatase TiO2. The photocatalytic activities
of the two kinds of Sb2O3-doped TiO2 were characterized by photodegradation of rhodamine B. The photocatalytic activity of Sb2O3-doped TiO2 is
effectively suppressed by the doping of Sb2O3. When Sb2O3:TiO2 is 0.21%, the photocatalytic activity of Sb2O3-doped TiO2
is the lowest. The photocatalytic activity of the second kind of Sb2O3-doped TiO2 is lower than that of the first.
参考文献
| [1] | |
| [2] | |
| [3] | 姚超, 张智宏, 林西平, 等(YAO Chao, et al).日用化学工业(China Surfactant Detergent & |
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