摘要
利用静电自组装法,将羧甲基纤维素(CMC)组装到Fe3O4上得到Fe3O4@CMC,再通过自由基聚合反应将丙烯酸(AA)和丙烯酰胺(AM)接枝交联到Fe3O4@CMC上,制备出F e3O4@CMC-g-p(AA-co-AM)(Fe3O4@hydrogel)微球。利用TEM、XRD、FTIR、TGA、XPS、BET等技术对Fe3O4hydrogel微球进行了表征,并将其作为催化剂应用于类芬顿高级氧化反应中催化降解酸性红73。结果表明:Fe3O4@hydrogel仍为反尖晶石型结构,共聚物CMC-g-p(AA-c o-AM)成功包覆在Fe3O4表面,且含量为17.7%,复合微球平均粒径在10n m左右,饱和磁化强度为44.8 emu/g,BET表面积为73.5m2/g,平均孔直径为8.3nm,为介孔结构。Fe3O4@hydrogel微球对酸性染料废水有良好的催化降解性能,通过调节芬顿反应体系中初始pH值、催化剂用量以及H2O2浓度,得到反应最适条件为pH3.5、H2O210mmol/l、催化剂用量200mg/l。在此条件下3h内能达到对酸性红7399.83%以上的降解。
Fe3O4@CMC-g-p(AA-co-AM)(Fe3O4@hydrogel)microspheres were prepared by electrostatic self-assembly method and radical polymerization reaction.The as-prepared microspheres were characterized by TEM,XRD,FTIR,TGA,XPS and BET techniques.Fe3O4@hydrogels were used for degradation of Acid Red 73(AR73)through Fenton advanced oxidation reaction.It was found that Fe3O4@hydrogel was still anti-spinel structure and copolymer CMC-g-p(AA-co-AM)was successfully coated on Fe3O4 surface.The content of hydrogel in the particles was 17.7%.The average diameters of the composite microspheres was about 10 nm.The saturation magnetization intensity was 44.8 emu/g,the BET surface area was 73.5m2/g.Fe3O4@hydrogel microspheres exhibited excellent catalytic degradation performance for acidic dye wastewater.The optimal reaction conditions were initial solution pH of 3.5,H2O2 of 10 mmol/L and catalyst dosage of 200 mg/l.Under this condition,up to 99.83%of the AR73 can be degraded within 3 h.
作者
沈娟莉
周益名
白永
薛国新
SHEN Juan-li;ZHOU Yi-ming;BAI Yong;XUE Guo-xin(College of Materials and Textiles,Zhejiang Sci-Tech University,Hangzhou 310018,China;Key Lab of Pulp and Paper Science&Technoloigy Ministry of Education,Qilu University of Technology,Jinan 250353,China)
出处
《中华纸业》
CAS
2020年第4期6-13,共8页
China Pulp & Paper Industry
基金
国家重点研发计划((2016)YFE0125800)
制浆造纸科学与技术教育部重点实验室开放基金资助(KF201503)。
关键词
FE3O4
水凝胶
类芬顿反应
催化降解
染料废水
Fe3O4
hydrogel
fenton-like reaction
catalytic degradation
acidic wastewater
