摘要：Magnetically recyclable porous sodium dodecyl sulfate(SDS)/Fe2O3 hybrids,which combine the porous structure of Fe2O3 and hydrophobicity of SDS,have been successfully synthesized for the first *** Fe2O3 has been first pyrolyzed from MIL-100(Fe)using a simple two-step calcination ***,the obtained porous Fe2O3 nanoparticles have been self-assembled with SDS molecules and yielded hydrophobic SDS/Fe2O3 *** porous SDS/Fe2O3 hybrids have been demonstrated to be highly efficient for the denitrification of pyridine under visible light *** pyridine removal ratio has reached values as high as 100%after irradiation for 240 *** the results of a series of experimental measurements,it was concluded that the superior photocatalytic performance of SDS/Fe2O3 hybrids could be attributed to(i)the fast electron transport owing to the unique porous structure of Fe2O3,(ii)the superior visible light absorption of Fe2O3 nanoparticles,and(iii)the“bridge molecule”role of SDS efficiently improving the separation and transfer across the interfacial domain of SDS/Fe2O3 of photogenerated electron-hole *** significantly,after the catalytic reaction,the SDS/Fe2O3 hybrids could be easily recovered using magnets and reused during subsequent cycles,which indicated their stability and recyclability.

摘要：用莫尔法对酱油中氯化钠含量进行分析时,由于酱油本身的颜色会严重干扰终点的准确判定.采用正交实验法,考虑溶液的pH值、活性炭的用量、水浴温度以及水浴时间是对脱色效果影响较大的4个因素,将这4个因素设计成变量,设计成为四因素三水平的正交实验,通过比较脱色率得出最佳脱色条件.结果表明:当水浴温度为80℃、pH=1、水浴时间为30min、活性炭用量为10g时,酱油的脱色效果最好,由最初的深褐色变为浅黄色.用莫尔法滴定分析脱色后酱油中氯化钠的含量时,滴定终点颜色突变明显.并与电位滴定法结果进行对比,发现了酱油脱色后能提高莫尔法测定酱油中氯化钠含量的准确度.