光催化功能Fe_2O_3/TiO_2陶瓷的制备及其光降解特性  

Preparation and Photodegradation of Photocatalytic Functional Fe_2O_3/ TiO_2 Ceramics

作　　者：李榕[1] 贾悦发 甄强[1] 布乃敬[1] 伍军[1] 

机构地区：[1]上海大学纳米科学与技术研究中心,上海200444

出　　处：《钢铁钒钛》2015年第1期26-31,共6页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金项目(51272154);上海大学创新基金项目(sdcx2012033);上海市高校青年教师培养资助计划项目;上海市教委上海高校教师产学研践习计划

摘　　要：以九水硝酸铁和硫酸钛为原料,利用共沉淀法合成了Fe2O3/TiO2混合粉体,粉体压制成型的素坯经过高温烧结制备Fe2O3/TiO2陶瓷。通过XRD、SEM分析Fe2O3/TiO2多孔陶瓷的物相和微观结构,并通过对甲基蓝溶液(浓度为25mg/L)的降解研究其光催化性能和循环使用性能。结果表明:紫外和可见光条件下,该陶瓷第一次使用时对甲基蓝溶液的最大降解率分别是80%和94%,循环使用三次后,最大降解率分别仅下降16%和17%。所制备的Fe2O3/TiO2陶瓷具有良好的光催化性能和循环使用性能,且利于收集,可以广泛应用于污水处理。Using iron nitrate nonahydrate（ Fe（ NO3）3·9H2O） and titanium sulfate（ Ti（ SO4）2） as raw materials,Fe2O3/ TiO2 mixed powders were synthesized by co-precipitation method. The green cylinders were formed under axial-pressure and sintered at high temperature to obtain the Fe2O3/ TiO2 ceramics.Phase and microstructure of Fe2O3/ TiO2 porous ceramics were analyzed by XRD and SEM. The photocatalytic and recyclable performances of the ceramics material in the degradation of methyl blue（ MB： 25 mg / L） were studied. The results indicate that after the first time of catalysis about 80% and 94% of MB is degraded with Fe2O3/ TiO2 ceramics respectively under the ultraviolet and visible（ UV / vis） light,after three times of recycles the maximum degradation rate of MB by Fe2O3/ TiO2 ceramics only reduces by16% and 17% under the ultraviolet and UV / Vis light,respectively. The Fe2O3/ TiO2 porous ceramics shows a good photocatalytic and recyclable performance,which is suggested to be a promising new photocatalysts widely used in the pollutant water treatment.

关 键 词：Fe2O3/TiO2陶瓷 光催化 循环使用性能 降解率 

分 类 号：TQ174.1[化学工程—陶瓷工业]