| 掺钇锆酸锶-TiO2复合光催化剂的制备及性能研究 |
| Preparation and Photocatalytic Property of Sr(Zr1-xYx)O3-δ-TiO2 Composite Particles |
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| 摘要: |
| 关键词: 共沉淀法 SrZrO3 TiO2 异质结 光催化 |
| 基金项目: |
| Abstract: SrZrO3 particles were prepared by a co-precipitation method and Sr(Zr1-xYx)O3-δ -TiO2 composite particles were then synthesized by Sr(Zr1-xYx)O3-δ and titanium dioxide. The composite particles were characterized by XRD, SEM, FTIR and TG-DTA techniques. The photocatalytic degradation of methylene blue (MB) in aqueous solution was used as a probe reaction to evaluate the photocatalytic activity of the composite particles. The effect of the preparation method for SrZrO3, doping content of yttrium and TiO2 amount in the composite particles on the photocatalytic activity of composite particles was also discussed. The results show that the methylene blue solution could be completely degraded by Sr(Zr1-xYx)O3-δ -TiO2 composite particles under UV-light or visible light irradiation. The photocatalytic activity of composite particles was higher than that of pure TiO2. The fast recombination of photogenerated electrons and holes were restrained by the heterojunction formed in composite particles. The particle of SrZrO3 prepared by co-precipitation was small, and the photocatalytic activity of composite particles prepared from this kind of SrZrO3 was higher than that of particles prepared by solid sintering method. The best doping content of yttrium is 5%. The optimal content of TiO2 in composite particles is 90wt%, 70wt%, respectively under UV-light and visible light irradiation, the degradation rates of MB are 98.8% and 93.5% , respectively after 50 min irradiation. |
| Keywords: co-precipitation SrZrO3 TiO2 heterojunction photocatalysis |
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| 摘要点击次数: 1334 |
| 全文下载次数: 1905 |
| 刘强,关鲁雄,阎建辉,许磊.掺钇锆酸锶-TiO2复合光催化剂的制备及性能研究[J].无机化学学报,2007,23(2):347-352. |
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