摘要
以316L不锈钢丝网为基材,利用电泳沉积技术对丝网表面进行改性,考察了添加剂浓度、电压加压方式、热处理温度对铝粉在丝网表面包覆效果的影响,制备出表面规整、高粘结强度的Al_2O_3/Al载体膜,在30min超声振荡后,载体膜脱落率仅为0.5wt%;结合表面浸涂技术,在丝网上涂覆纳米La_(0.8)Sr_(0.2)MnO_3,通过SEM、XRD、BET等手段对催化剂进行表征,发现丝网表面催化剂负载均匀,比表面积达到119.4m^2/g,在30min超声振荡后,脱落率为5.0wt%.催化燃烧性能测试表明,La_(0.8)Sr_(0.2)MnO_3在不锈钢丝网上有较好的活性,高空速、高浓度的甲苯在400℃基本能被完全燃烧.
A well-adhered and uniform Al2O3/Al layer with only 0.5wt% lost after 30min vibration was formed on the 316L wire mesh surface after electrophoretic deposition and thermal treatment. The effects of concentration of additives, the way of applied voltage, temperature of thermal treatment on the binding strength of surface layer were investigated. In addition,La0.8Sr0.2MnO3 obtained from the method of co-deposition were wash-coated onto the Al2O3/Al-wire mesh. The wire-mesh catalysts were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM）, Brunauer-Emmett-Teller （BET）. The results show that the La0.8Sr0.2MnO3 is combined strongly with wire mesh and only lost 5.0wt% after 30min vibration, and its BET surface area reaches 119.4m^2/g when mixed with γ-Al2O3. Then the wire-mesh catalysts were applied for catalytic combustion of toluene, the La0.8Sr0.2MnO3 coated onto wire mesh shows good activity, and the toluene can be cleared up at 400℃ in high space velocity and high concentration condition.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第6期1221-1226,共6页
Journal of Inorganic Materials
基金
浙江省科技厅重点项目(2006C21079)
