磁性纤维素基@ZnFe2O4碳气凝胶纳米复合材料制备及光催化性能研究  

Preparation of magnetic cellulose based@ZnFe2O4 carbon aerogel nanocomposites for photodegradation

作　　者：赵欢欢 丁成立[1] 岳盼 ZHAO Huanhuan;DING Chengli;YUE Pan(School of Chemical Engineering andTechnolagy, Xinjiang University, Urumqi 830046, China)

机构地区：[1]新疆大学化工学院,乌鲁木齐830046

出　　处：《功能材料》2020年第12期12126-12134,共9页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21666035)。

摘　　要：通过一锅法运用共沉淀的原理将铁酸锌负载到纤维素水凝胶上,采用冷冻干燥技术形成纤维素基@ZnFe2O4复合气凝胶,将其置于管式炉中600℃无氧煅烧2 h,获得纤维素基@ZnFe2O4碳气凝胶纳米复合材料。通过FT-IR、XRD、SEM、XPS、VSM、BET等表征手段对材料形貌和结构进行分析,纤维素基@80%ZnFe2O4碳气凝胶纳米复合材料展现出117.68 m^2/g的比表面积以及超顺磁性。选择亚甲蓝(MB)充当污染物,用氙灯来模拟太阳光对材料进行性能测试。性能测试实验表明,纤维素基@80%ZnFe2O4碳气凝胶纳米复合材料材料具有较好的吸附与光降解的协同效果,材料在碱性条件下更适合光降解,0.1 g纤维素基@80%ZnFe2O4碳气凝胶纳米复合材料对100 mg/L的MB溶液降解率达到93.6%,经过四次循环实验之后,对40 mg/L的MB溶液的移除率仍然能达到97.3%。ZnFe2O4 was loaded onto cellulose hydrogel based on the principle of co-precipitation by one-pot method,and the freeze-drying technology was adopted to form cellulose@ZnFe2O4 composite aerogel as well,which was placed in a tube furnace for calcining at 600℃for 2 h to obtain cellulose-based@ZnFe2O4 carbon aerogel nanocomposites.The morphology and structure of the prepared material were analyzed by means of FT-IR,XRD,SEM,XPS,VSM and BET and so on.The results of characterizations demonstrated that cellulose based@80%ZnFe2O4 carbon aerogel nanocomposites exhibited rising specific surface area(117.68 m^2/g)and superparamagnetic properties.Employing methylene blue(MB)as a pollutant,the xenon lamp was utilized to simulate sunlight to test the material's functions.Performance testing experiments showed that there were good adsorption and photodegradation of synergy effect for the cellulose based@80%ZnFe2O4 carbon aerogel nanocomposites.Meanwhile,the material was more suitable for photodegradation in alkaline condition.It was effective for 0.1 g cellulose based@80%ZnFe2O4 carbon aerogel nanocomposite to remove MB of 100 mg/L solution,whose degradation rate was 93.6%.After four cycles,the removal rate of MB solution of 40 mg/L still reached 97.3%.

关 键 词：ZNFE2O4 碳气凝胶 磁性 光降解 

分 类 号：TB333[一般工业技术—材料科学与工程] TQ319[化学工程—高聚物工业]