| 负载型催化剂光催化氧化五氯苯酚钠的效果 |
| 摘要点击 1360 全文点击 2622 投稿时间：2000-05-24 |
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| 中文关键词 光催化氧化 二氧化钛 负载型催化剂 投加量 初始浓度 供氧量 |
| 英文关键词 photocatalytic oxodation TiO2 coated photocatalysts dosage initial concentration oxygen |
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| 中文摘要 |
| 研究以TiO2 为基本活性组分、空心玻璃珠为载体、硅酸钠为粘合剂的负载型催化剂的制备技术 .选取五氯苯酚钠 (PCP-Na)为处理对象 ,结合对催化剂比表面和晶型结构的表征 ,对制备的催化剂进行筛选评价 .实验结果表明 :在适当的条件下 (二氧化钛、空心玻璃珠、40%硅酸钠溶液重量比为 4∶20∶2,650℃下烧 3h)所制备的C3型催化剂不仅光催化活性高 ,且负载牢固 ,易与水分离 .对初始CODCr=400mg·L-1,PCP-Na=10mg·L-1的反应液 ,在光照强度为 30kW·m-2下 2hCODCr去除率大于 65% ,PCP-Na去除率大于 92%.试验进一步探讨C3型催化剂投加量、反应液初始浓度、供氧量对催化反应的影响 . |
| 英文摘要 |
| Titanium dioxide (TiO2)photocatalysts were coated on hollow glass beads by sodium silicate (Na2SiO3·9H2O) solution.The coated catalysts were characterized by BET,XRD. Their photoactivity were examined using photocatalytic degradation of sodium pentachlorophenolate(PCP-Na) and glucose solution.The impact of catalysts dosage,PCP-Na initial concentration,initial pH and oxygen concentration on reaction kinetics were also studied in detail.The experiments illustrated that the performance of C3 type catalysts was satisfactory.Conditions of the experiments were following: The initial concentration of PCP Na and CODCr were 10 mg·L-1 and 400 mg·L-1 ,respectively,and illumination time was 2 hours and catalysts dosage was 2g·L-1,the removal rates of CODCr and PCP Na were above 65% and 92% respectively.Optimum dosage of C3 type catalysts was 2～2.5 g·L-1 ,DO was no less than 3 mg·L-1. |
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