絮凝污泥制备TiO2/MCM-41复合光催化剂及降解罗丹明B

研究了以聚硅硫酸钛为絮凝剂,处理掺杂MCM-41型分子筛的长江水,将产生的大量絮体经抽滤、烘干和一定温度下煅烧,制备了具有光催化活性的TiO2/MCM-41复合光催化剂,并用X射线衍射（XRD）对其进行了表征。结果表明,在长江水浊度为86.7NTU,MCM-41分子筛掺杂量为0.7g/L时,经聚硅硫酸钛絮凝产生的絮凝污泥在700℃下煅烧2h后制备的复合光催化剂活性最高,光催化氧化浓度为20mg/L的罗丹明B 40m in后脱色率达97.6%。

Preparation of TiO2/MCM-41 Composite Photocatalyst with Flocculation Sludge and Degradation of Rhodamine B

The Yangtze River water doped MCM-41 molecular sieve was processed by silicon polymer titanium as flocculants,which would produce a large number of flocs,after suction filtered,dried and calcined at a certain temperature.The TiO2/MCM-41 composite photocatalyst with photo catalytic activity was prepared,and investigated by X-diffraction（XRD）.The results showed that the turbidity of Yangtze Rive water was 86.7 NTU,the doping amount of MCM-41molecular sieve was 0.7g/L,and the composite photocatalyst had the best photo catalytic activity after the flocculation sludge which produced by silicon polymer titanium flocculation was calcined for 2h at 700℃.The degradation rate of 20mg/L Rhodamine B reached 97.6% after 40min.