摘要
以硅钨酸为敏化剂,采用水热法合成了杂多酸敏化光催化剂TiO2-SiW。利用X-射线衍射(XRD)、紫外-可见吸收光谱(UV-vis)等测试手段对样品进行表征,以罗丹明B为模拟污染物评价其光催化活性。XRD结果表明,所得TiO2催化剂为锐钛矿型;UV-vis吸收光谱分析表明,杂多酸敏化使TiO2在可见光区的吸收增强,吸收边红移;光催化实验结果表明,所得TiO2-SiW催化剂光催化活性较好,将催化剂对模拟污染物的处理取得了较好的成果。
The silicotungstic acid sensitized nano-TiO2 （TiO2-SiW） photocatalysts were synthesized using silicotungstic acid as sensitizer via a hydrothermal method. As-synthesized samples were characterized by XRD and UV-vis techniques and Rhodamine B was chosen as the model pollutant to evaluate photocatalytic activity of As-synthesized samples. UV-Vis absorption spectrum indicated that TiO2-SiW photocatalysts were extended significantly into visible region comparing to pure TiO2. Photocatalytic experiment results indicated that TiO2-SiW photocatalysts exhibited much greater photocatalytic activity than pure TiO2. Photocatalytic degradation of model pollutant was treated under UV light and sunlight. Results revealed that silicotungstic acid had a great influence on the photocatalytic activity of TiO2.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第3期27-31,共5页
Environmental Science & Technology
基金
国家自然科学基金(20773104)
教育部新世纪优秀人才支持计划(NCET-06-0891)
教育部重点科研基金(208143)
陕西省教育厅专项科研基金(07JK435)
陕西省重点实验室重点科研基金(08JZ81)
延安大学科研基金项目(KYQD2008-001)
关键词
纳米二氧化钛
杂多酸敏化
水热法
光催化
nano-TiO2
silicotungstic acid sensitization
hydrothermal method
photocatalysis
