摘要
以叠氮化钠为氮源、硅溶胶为硅源、钛酸四丁酯为钛源、六亚甲基亚胺(HMI)为模板剂,按SiO2∶0.03TiO2∶(0-0.01)N∶0.03HMI∶0.035Al2O3∶0.2NaOH∶20H2O的摩尔比,采用静态水热晶化法合成了具有MWW层状结构的N-Ti-MCM-22分子筛。研究了所合成的分子筛的光催化性能,考察了催化剂的含氮量、催化剂的投加量、pH值、亚甲基蓝的初始浓度、光催化时间等因素对光催化降解亚甲蓝的影响。结果表明:N-Ti-MCM-22分子筛对亚甲基蓝的光催化降解效果较好,催化剂的投加量为1g/L、亚甲基蓝初始浓度在4mg/L、pH为中性在紫外光下的降解效果较好,脱色率及降解率分别达到了95.9%和97.8%,并采用XRD、TEM和EDS等对分子筛样品进行了表征。
N-Ti-MCM-22 molecular sieve with MWW of layer structure was synthesized using the static hydrothermal crystallization method, sodium azide as nitrogen source, silica sol as silicon source, titanium tetrabutyl as titanate source, hexamethylene imine （HMI） as template agent, in accordance with molar ratio of SiO2 ： 0.03TiO2：（0 - 0.01） N： 0.03HMI ： 0.035Al2O3：0.2NaOH ： 20H2O. the photocatalytic properties of synthesis zeolite was studied, the nitrogen-containing catalyst volume, catalyst dosage, pH, initial methylene blue concentration, time and light source of photocatalytic to degradation methylene blue such as the impact factors were investigated. The results showed that N-Ti-MCM-22 molecular sieve photocatalytic degradation of methylene blue is better, catalyst dosage is lg/L, initial concentration of methylene blue is 4mg/L, pH neutral degradation under ultra-violet light is better, and the degradation rate and decolorization rate is 95.9% and 97.8%, respectively, zeolite samples were characterized with XRD, TEM and EDS.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2011年第6期17-21,共5页
China Ceramics
基金
江西省教育厅重点项目(GJJ11025)
