| 低温水热法制备硅胶负载型二氧化钛催化剂 |
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| 引用本文： | 杨骏,游卓亚,唐渝,张渊明.低温水热法制备硅胶负载型二氧化钛催化剂[J].化学研究与应用,2007,19(9):1041-1044. |
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| 作者姓名： | 杨骏 游卓亚 唐渝 张渊明 |
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| 作者单位： | 1. 暨南大学化学系,广东,广州,510632;暨南大学纳米化学研究所,广东,广州,510632
2. 暨南大学化学系,广东,广州,510632 |
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| 基金项目： | 广东省自然科学基金团队资助项目(05200555) |
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| 摘 要： | TiO2作为一种优良的光催化材料,能够降解有机物,起到抗菌防污的作用,其在工业上的潜在应用已吸引众多研究者的普遍关注和深入研究1-3]。为了进一步提高它的光催化活性,研究者试图运用各种方法和技术对纯TiO2进行改进。负载3]是其中常用方法之一。对于无负载的二氧化钛,由于本
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| 关 键 词： | TiO2-SiO2 低温水热法 光催化 亚甲基蓝 |
| 文章编号： | 1004-1656（2007）09-1041-04 |
| 收稿时间： | 2007-01-15 |
| 修稿时间： | 2007-04-05 |
Silica supported titania catalysts prepared under low temperature |
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| YANG Jun,YOU Zhuo-ya,TANG Yu,ZHANG Yuan-ming.Silica supported titania catalysts prepared under low temperature[J].Chemical Research and Application,2007,19(9):1041-1044. |
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| Authors: | YANG Jun YOU Zhuo-ya TANG Yu ZHANG Yuan-ming |
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| Institution: | 1.Department of Chemistry,Jinan University,Guangzhou 51032,China; 2.Institute of Nanochemistry,Jinan University,Guangzhou 510632,China |
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| Abstract: | Nanosized TiO2-SiO2 supported catalysts were prepared by low-temperature hydrothermal method.These catalysts were characterized by BET,XRD,and employed to degrade methylene blue under UV-irradiation.The results show that hydrothermal time and TiO2 content have critical effect on performance of the catalysts.The catalyst prepared with TiO2-SiO2 ratio of 7:3 and hydrothermal time of 5 h exhibited the highest photoactivity of 0.0307 min-1,which was 2 times higher than that of pure TiO2.This strongly indicated that the photocatalytic activity of titania/silica mixed materials depends on the adsorption ability of catalyst and the photocatalytic activity of the titania,and there is an optimal ratio of Ti : Si,too high or low Ti : Si ratio will lower the photodegradation ability of the catalysts. |
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| Keywords: | TiO2-SiO2 low-temperature hydrothermal photocatalytic methylene blue |
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