中空多孔磁性Fe_(3)O_(4)/纤维素/海泡石微球异相Fenton催化降解亚甲基蓝  

Magnetic hollow porous Fe_(3)O_(4)/cellulose/sepiolite microspheres as heterogeneous fenton catalysts for degradation of methylene blue

作　　者：李婷婷 李瑞雪 冯馨心 程帅 焦晨璐 王健[1] LI Tingting;LI Ruixue;FENG Xinxin;CHENG Shuai;JIAO Chenlu;WANG Jian(Textile Engineering and Academy of Art,Anhui Agricultural University,Hefei 230036,Anhui,China)

机构地区：[1]安徽农业大学轻纺工程与艺术学院,安徽合肥230036

出　　处：《精细化工》2022年第9期1858-1865,共8页Fine Chemicals

基　　金：国家自然科学基金青年基金(51803004);安徽农业大学研究生创新基金项目(2021yjs-49)。

摘　　要：以微晶纤维素和纳米Fe_(3)O_(4)为原料,采用包埋法制得Fe_(3)O_(4)/纤维素(Fe_(3)O_(4)/MCC)溶液,将海泡石(SEP)掺入至Fe_(3)O_(4)/MCC溶液中,制得Fe_(3)O_(4)/纤维素/海泡石复合微球(Fe_(3)O_(4)/MCC/SEP)。通过SEM、FTIR、XRD、VSM、N吸附-脱附对Fe_(3)O_(4)/MCC/SEP的形貌、化学结构、磁响应性能、比表面积进行了表征,探讨了其作为Fenton催化剂对亚甲基蓝(MB)的降解效果及机理。结果表明,Fe_(3)O_(4)/MCC/SEP呈现出优异的中空多孔结构和超顺磁性。当MB质量浓度为10 mg/L、pH为3、Fe_(3)O_(4)/MCC/SEP的投入量为0.02 g、HO用量为5 mL、反应300 min时,Fe_(3)O_(4)/MCC/SEP对MB的Fenton催化去除率高达99%。此外,经过4次循环使用后,Fe_(3)O_(4)/MCC/SEP对MB的去除率仍达83%。Magnetic cellulose/sepiolite (SEP) composite microspheres (Fe_(3)O_(4)/MCC/SEP) were obtained by doping sepiolite in aqueous mixture solution of Fe_(3)O_(4)/MCC which was prepared by immobilization of nano-Fe_(3)O_(4)on microcrystalline cellulose(MCC).Then the morphology,structure,composition and specific surface area of Fe_(3)O_(4)/MCC/SEP were characterized by SEM,FTIR,VSM,Nadsorption-desorption.Moreover,the mechanism and performance of Fe_(3)O_(4)/MCC/SEP as heterogeneous Fenton catalyst for the oxidative degradation of methylene blue (MB) were analyzed.Characterization results showed that Fe_(3)O_(4)/MCC/SEP exhibited an excellent hollow porous structure and super paramagnetism.Catalytic performance study indicated that the Fenton removal rate of MB reached up to 99%at 300 min at the conditions of MB mass concentration 10 mg/L,Fe_(3)O_(4)/MCC/SEP dosage 0.02 g,HO5 m L and p H=3.Furthermore,the removal rate of MB remained 83%after 4 recyclable cycles.

关 键 词：纤维素 海泡石 磁性微球 FENTON降解 亚甲基蓝 催化技术 

分 类 号：O636[理学—高分子化学]