一种生态友好粉煤灰基地质聚合物的合成及光催化性能  

An Eco-friendly Fly Ash-Based Geopolymer: Synthesis and Photocatalytic Properties

作　　者：张耀君[1] 张科[1] 康乐[1] 张力[1] ZHANG Yao-Jun ZHANG Ke KANG Le ZHANG Li(College of Materials and Mineral Resources, Xi＇an University of Architecture and Technology, Xi＇an 710055, China)

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055

出　　处：《无机化学学报》2017年第1期16-25,共10页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21676209;21346011);陕西省教育厅重点科研项目(No.16JS055);陕西省自然科学基金重点项目(No.2013JZ014)资助

摘　　要：以乌洛托品为孔形成剂,制备出孔结构可调控的粉煤灰基地质聚合物;通过半导体耦合设计,合成出In_2O_3和NiO双负载粉煤灰基地质聚合物催化剂;采用XRF、TGA/DSC、FESEM、XRD、FT-IR、UV-Vis等对催化剂的组成、结构及性能进行表征,考查了该催化剂体系对模拟印染废水的光催化降解活性、降解机理及反应动力学。结果表明:孔形成剂的掺入能够显著地改善地质聚合物的孔结构,调变BET比表面积及介孔体积;双负载5%In_2O_3及1%NiO的粉煤灰基地质聚合物催化剂对碱性品绿染料的最高降解率(95.65%),归因于In_2O_3与NiO形成的p-n结半导体耦合体系以及In_2O_3与PAFAG载体之间产生强相互作用,改善了光生电子-空穴对的分离效率,从而提高了光催化染料降解活性。The fly ash-based geopolymer with regulable pore structure was firstly synthesized by using urotropineas pore forming agent. Meanwhile, a kind of In203 and NiO co-loaded fly ash-based geopolymer was firstlysynthesized by the coupling design of semiconductors. The composition, structure and properties of catalysts werecharacterized by XRF, TG/DSC, FESEM, XRD, FT-IR and UV-Vis. Furthermore, degradation activities ofsimulated dyeing wastewater, mechanism and reaction dynamics were studied. The results indicated that the porestructure, BET specific surface area and mesopore volume of geopolymer were remarkably improved by addingpore forming agent. The highest degradation rate （95.65%） of magenta green crystals over the 5% In203 and 1%NiO co-loaded catalyst should ascribe to the semiconductor coupling system of p-n junction generated from In203and NiO as well as strong interaction produced between In203 and PAFAG so that the separation efficiencies ofphotogenerated electron-hole pairs were improved and the photocatalytic degradation activities of dye wereenhanced.

关 键 词：铝硅酸盐 半导体 光催化 粉煤灰基地质聚合物 染料降解 

分 类 号：TQ536.4[化学工程—煤化学工程]