酸性红3R染料是一种常见的工业染料,在紫外灯(20 W)辐射下利用二氧化钛可以将其光催化降解为水、二氧化碳和其它一些小分子无机化合物。以混晶结构的纳米二氧化钛为催化剂,在紫外灯辐照下进行了光降解实验,结果表明,该反应为一级反应,...酸性红3R染料是一种常见的工业染料,在紫外灯(20 W)辐射下利用二氧化钛可以将其光催化降解为水、二氧化碳和其它一些小分子无机化合物。以混晶结构的纳米二氧化钛为催化剂,在紫外灯辐照下进行了光降解实验,结果表明,该反应为一级反应,速率常数为0.003 15 m in-1。同时,讨论了反应过程中的pH值,氧化钛的用量对催化反应的影响,并证实有机染料在180 m in内脱色率超过80%。展开更多
Using ZnSO4 and TiCl4 as raw materials, nanometric TiO2 ZnO (ZnTiO3) is prepared at 180℃,0.8MPa by hydrothermal method. The effects of the reaction temperature and time on the nanometric TiO2 ZnO are also discussed. ...Using ZnSO4 and TiCl4 as raw materials, nanometric TiO2 ZnO (ZnTiO3) is prepared at 180℃,0.8MPa by hydrothermal method. The effects of the reaction temperature and time on the nanometric TiO2 ZnO are also discussed. XRD shows that the product is TiO2 ZnO (ZnTiO3) with noncrystal phase, and it changes to rhombic form above 870℃. TEM measurement indicates that the TiO2 ZnO is spherical particles, and the average diameter of the particles is 20nm. The UV light absorption properties are detected by UV spectrophotometer. The results show that the nanometric TiO2 ZnO has strong absorption at 200~370nm and at visible region. Photodegradation of dyes in an aqueous solution is investigated using nanometric TiO2 ZnO as a photocatalyst. The results show that after 60min illumination, the decolorization rate of the acidic red B and acidic black 234 dye can be arrived at 100%.展开更多
文摘酸性红3R染料是一种常见的工业染料,在紫外灯(20 W)辐射下利用二氧化钛可以将其光催化降解为水、二氧化碳和其它一些小分子无机化合物。以混晶结构的纳米二氧化钛为催化剂,在紫外灯辐照下进行了光降解实验,结果表明,该反应为一级反应,速率常数为0.003 15 m in-1。同时,讨论了反应过程中的pH值,氧化钛的用量对催化反应的影响,并证实有机染料在180 m in内脱色率超过80%。
文摘Using ZnSO4 and TiCl4 as raw materials, nanometric TiO2 ZnO (ZnTiO3) is prepared at 180℃,0.8MPa by hydrothermal method. The effects of the reaction temperature and time on the nanometric TiO2 ZnO are also discussed. XRD shows that the product is TiO2 ZnO (ZnTiO3) with noncrystal phase, and it changes to rhombic form above 870℃. TEM measurement indicates that the TiO2 ZnO is spherical particles, and the average diameter of the particles is 20nm. The UV light absorption properties are detected by UV spectrophotometer. The results show that the nanometric TiO2 ZnO has strong absorption at 200~370nm and at visible region. Photodegradation of dyes in an aqueous solution is investigated using nanometric TiO2 ZnO as a photocatalyst. The results show that after 60min illumination, the decolorization rate of the acidic red B and acidic black 234 dye can be arrived at 100%.