CeO_2负载多孔碱激发钢渣基催化剂的制备及其光催化性能  

Preparation and Photocatalytic Activity of CeO_2 Loaded Porous Alkali-Activated Steel Slag-Based Catalyst

作　　者：康乐[1] 张耀君[1] 张力[1] 张科[1] 杨梦阳[1] 

机构地区：[1]西安建筑科技大学材料与矿资学院,陕西西安710055

出　　处：《光谱学与光谱分析》2017年第3期875-880,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(21676209;21346011);陕西省自然科学基金重点项目(2013JZ014);陕西省教育厅自然科学重点科研项目(16JS055)资助

摘　　要：固体废弃物高附加值利用是资源可持续发展的重要途径之一,创新性的提出了以丙烯酸树脂乳液为孔形成剂,对碱激发钢渣基胶凝材料的孔结构进行调变,制备出新型多孔碱激发钢渣基胶凝材料,采用初湿浸渍法合成了一种新型的CeO_2负载的多孔钢渣基催化剂。利用XRF,XRD,BET,UV-Vis DRS等手段对光催化剂的组成、结构及光谱性能进行了表征,评价了其光催化分解水制氢活性。结果表明:孔形成剂的加入,改变了碱激发钢渣基胶凝材料的孑L结构,其介孔体积增加了70.27%,负载8 Wt%CeO_2的光催化剂介孔体积增加了144.14%。在模拟太阳光源辐照6 h后,负载8 Wt%CeO_2的光催化剂的最高产氢活性(7 653μmol·g^(-1))和产氢速率[1 275.5μmol·(g·h)^(-1)]归因于介孔体积增加了水分子的传质速率以及高分散的CeO_2活性组分与载体中FeO形成的耦合半导体促进了光生电子-空穴对的高效分离。High value-added utilization of solid wastes is one of the important ways of sustainable development.A novel pore size-controlled alkali-activated steel slag-based cementitious material（PASSCM） was synthesized by adjusting the content of pore forming agent of acrylic resin emulsion.Meanwhiel,a new type of porous steel slag-based catalyst loaded CeO_2 was prepared via incipient wetness impregnation method in the paper.The composition,structure and optical properties of photocatalysts were characterized with XRF,XRD,BET and UV-Vis DRS.Meanwhile,the photocatalytic performance of hydrogen production from water was evaluated.The results showed that adding pore-forming agent changed the pore structure and the mesoporous volume increased by 70.27%of alkali-activated steel slag-based cementitious material.The mesoporous volume increased by 144.14%in photocatalyst loaded 8 Wt%CeO_2.In the simulated solar source irradiation for 6 h,the photocatalyst loaded 8wt%CeO_2 exhibiting the highest photocatalytic hydrogen production activity（7 653 μmol · g^（-1）） and hydrogen generation rate[1 275.5 μmol ·（g · h） ^（-1）],which were attributed to mesoporous volume increases the mass transfer rate of the water molecules,and in the formation of the coupled semiconductors,the high dispersion of the CeO_2 active component and the FeO in the carrier promoted the high efficiency separation of the photogenerated electron-hole pairs.

关 键 词：碱激发 钢渣基胶凝材料 孔形成剂 CEO2 光催化产氢 

分 类 号：TQ172[化学工程—水泥工业]