The gold ion modified TiO 2 was prepared by means of sol\|gel whereas gold deposited TiO\-2 was prepared by means of photo\|reduction. The physical properties were influenced significantly by the presence of gold ion ...The gold ion modified TiO 2 was prepared by means of sol\|gel whereas gold deposited TiO\-2 was prepared by means of photo\|reduction. The physical properties were influenced significantly by the presence of gold ion or gold. The enhanced photo\|activity of gold modified TiO\-2 was quantified in terms of methylene blue degradation. The presence of gold ion in TiO\-2 lattices or gold on TiO\-2 surface enhanced their photo\|activity. The optimum molar content of gold ion doping and gold deposition all was 0.5%. The first\|order rates constants of gold modified TiO\-2 was more than that of pure TiO\-2, and decreased by increasing the content of gold ion and gold when their contents were more than 0.5%. Gold ion doped in TiO\-2 lattices was more effective to enhance the photo\|activity than gold on TiO\-2 surface. Moreover, the relationship between physical properties, chemical properties and photo\|activity has been discussed.展开更多
基金Project supported by the State Environmental Protection Administration of China (No.2001-1-2)State Environmental Protection Administration of Guangdong (No.2001-08)Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control,and the National Natural Science Foundation of China(Nos.30170147 and 30270282)
文摘从到全球环境的污染的中国的副热带的区域的坚持的有机污染物(流行音乐) 的贡献被付了大注意；然而，很少在中国的这些区域以内在农业生态系统对流行音乐的国家被知道。这研究首先揭示了污染的国家和多不的芳族烃的分发(哼) 在在副热带的区域的农业土壤。115 表土(0 20 厘米) 在这些区域的胃被取样。集中和类型哼坚定的使用气体色层法被连接到质谱法(GCMS ) 。总数哼集中从 22.1 ～ 1 256.9 ng g ? 1，与 318.2 ±的一个平均数 148.2 ng g ? 1。措辞笼统地，水流哼集中比大多数哼低层次从不同国家和区域在很多调查报导了。哼异构体比率显示了那焦性没食子酸 lysin 的起源例如与车辆尾巴气体和工业排出物有关的石块燃料燃烧，是主导的来源在中国的南部的副热带的区域哼。尽管哼集中与减少的污染，人口，和交通密度减少了，在很大程度上哼作文在整个副热带的土壤是类似的与萘，菲， fluoranthene，和是主导的 benzo (b) fluoranthene。
基金Guangdong Natural Science Foundation (No .980 0 12 )
文摘The gold ion modified TiO 2 was prepared by means of sol\|gel whereas gold deposited TiO\-2 was prepared by means of photo\|reduction. The physical properties were influenced significantly by the presence of gold ion or gold. The enhanced photo\|activity of gold modified TiO\-2 was quantified in terms of methylene blue degradation. The presence of gold ion in TiO\-2 lattices or gold on TiO\-2 surface enhanced their photo\|activity. The optimum molar content of gold ion doping and gold deposition all was 0.5%. The first\|order rates constants of gold modified TiO\-2 was more than that of pure TiO\-2, and decreased by increasing the content of gold ion and gold when their contents were more than 0.5%. Gold ion doped in TiO\-2 lattices was more effective to enhance the photo\|activity than gold on TiO\-2 surface. Moreover, the relationship between physical properties, chemical properties and photo\|activity has been discussed.
