中文摘要：本研究用配合物前驱体转换法制备无掺杂或Sc掺杂的纳米SrTi0.7Fe0.3O3样品。制备的光催化剂用XRD、漫反射光谱和光XPS进行表征。所制备的样品具有立方钙钛矿结构。Sc掺杂导致了立方晶格参数和单位晶胞体积增大及带隙值减小。检测到掺杂10mole% Sc的SrTi0.7Fe0.3O3(1.58 eV)的带隙最小。开展基体效应分析将可见光解毒黄曲霉毒素B1(AFB1)与照射时间、初始AFB1浓度、催化剂用量及PH关联起来。样品的平均晶粒尺寸在13-21nm之间。Sc掺杂在AFB1的SrTi0.7Fe0.3O3可见光催化降解中起着重要作用。10mole% Sc掺杂的SrTi0.7Fe0.3O3样品在120分钟内去除了约88.2%的黄曲霉毒素B1，远高于无掺杂、1或5mole% Sc掺杂的SrTi0.7Fe0.3O3。用GC/MS证实了AFB1解毒生成的中间体。
外文摘要：Nano-sized undoped and Sc-doped SrTi0.7Fe0.3O3 samples were prepared using the complex precursor route. The prepared photcatalysts were characterized using XRD, diffuse reflectance and XPS. The prepared samples have cubic perovskite-like phase structure. Sc doping leads to increasing both the cubic lattice parameter and unit cell volume and also decreasing the band gap values. The lowest band gap was detected for 10 mole% Sc doped SrTi0.7Fe0.3O3 (1.58 eV). A matrix effect analysis was applied to correlate the photo detoxification of aflatoxin B1 (AFB1) in the visible light to the irradiation time, initial levels of AFB1, amount of catalysts and pH. The average crystallite size of the samples is in the range of 13–21 nm. Sc doping played an important role in the photocatalytic degradation of AFB1 by SrTi0.7Fe0.3O3 in visible light. About 88.2% removal of aflatoxin B1 was achieved by 10 mole% Sc doped SrTi0.7Fe0.3O3 sample within 120 min in visible light, which is higher than that of undoped, 1 or 5 mole% Sc doped SrTi0.7Fe0.3O3. The intermediates formed in the detoxification of AFB1 was proved using GC/MS
外文关键词：Sc-doped Sr0.7Fe0.3O3；Photocatalyst；Characterization；Aflatoxin B-1；Detoxification
作者：Jamil, TS；Abbas, HA；Nasr, RA；El-Kady, AA；Ibrahim, MIM
作者单位：Natl Res Ctr
期刊名称：JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
期刊影响因子：2.477
出版年份：2017
出版刊次：5
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