Photocatalytic properties of SrTiO3 nanoparticles prepared by a polyacrylamide gel route

Photocatalytic properties of SrTiO3 nanoparticles prepared by a polyacrylamide gel route
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聚丙烯酰胺凝胶法制备SrTiO3纳米粒子的光催化性能

DOI:
10.1016/j.matlet.2011.07.019
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发表时间:
2011-11
期刊:
影响因子:
3
通讯作者:
杨华
杨华
中科院分区:
材料科学3区
文献类型:
--
作者:
县涛(研究生);杨华

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采用聚丙烯酰胺凝胶法制备了纳米级的纳米级钛酸锶。研究发现,络合剂的选择对钛酸锶的合成有很大的影响。使用柠檬酸作为络合剂可以在550℃的焙烧温度下合成纯的SrTiO_3,而使用络合剂醋酸则需要更高的800℃的焙烧温度才能得到单一的样品。柠檬酸和醋酸制得的样品均为球形颗粒,平均粒径分别为~55 nm和~100 nm。通过对刚果红、RhB、MO和MB在紫外光照射下的降解实验,考察了所制备的纳米SrTiO2的光催化性能。柠檬酸生成的样品表现出比醋酸生成的样品更高的光催化活性,这可能是因为它的颗粒相对较小。此外,不同染料的降解效率不同,其中刚果红的降解效率最高。
A polyacrylamide gel method has been used to prepare SrTiO3nanoparticles. It is found that the choice of chelating agent has a great influence on the SrTiO3synthesis. The use of citric acid as the chelating agent leads to the synthesis of pure SrTiO3at a calcination temperature of 550°C. By using the chelating agent acetic acid, however, a much higher calcination temperature at 800°C is required to produce a single sample. The citric acid- and acetic acid-resulted samples exhibit both sphere- particle morphology, and have an average particle size of ~55nm and ~100nm, respectively. The photocatalytic properties of the as-prepared SrTiO3nanoparticles have been investigated by the degradation of Congo Red, RhB, MO, and MB under ultraviolet irradiation. The citric acid-resulted sample is found to exhibit a photocatalytic activity higher than the acetic acid-resulted sample, expectedly due to its relatively smaller particle size. In addition, different degradation efficiencies are found between the dyes, and the highest degradation efficiency is observed for Congo Red.
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