芬顿反应脱色高浓度刚果红染料,Colloids and Surfaces A: Physicoche
花形CeO2/Fe3O4磁性催化剂的协同光催化-芬顿反馈脱涩高浓度刚果红染料
Colloids and Surfaces A: Physicochemical and Engineering Aspects
(
IF
4.9
)
Pub Date : 2022-04-26
, DOI:
10.1016/j.colsurfa.2022.129021
Dong Xiang
1,
2
,
Siyu Lu
1,
2
,
Yuqin Ma
2
,
Lang Zhao
1
Affiliation
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry Changchun Chinese Academy of Sciences 130022 P R China
School of Chemistry and enZZZironmental engineering, Changchun uniZZZersity of science and technology Changchun 130012 P R China
原文通过水热法将Fe 3 O 4笼罩正在CeO 2 外表分解了CeO 2 /Fe 3 O 4纳米复折伙料做为磁可回支光催化剂，造成为了具有较大比外表积的花形光子-Fenton催化剂。 . 对资料的构成、形貌和理化性量停行了表征。钻研发现，介孔CeO 2 /Fe 3 O 4复折伙料做为吸附剂、光催化和类Fenton催化剂正在很急流平上按捺了CeO 2氧化机能的局限性。并对刚果红（CR）的去除有多重做用。介孔资料劣良的吸附才华归因于CeO 2外表富厚的氧空位和高比外表积。正在光-芬顿反馈历程中，光催化和芬顿反馈具有协同做用，大大进步了CeO 2 /Fe 3 O 4的光催化机能，对污染物具有很强的来临解才华。另外，正在过氧化氢（H 2 O 2）存正在下，由于Fe和Ce价态厘革的协同做用，CR的降解获得了加强。花形光子-芬顿催化剂 CeO 2 /Fe 3 O4对高浓度CR有很好的降解成效。正在pH 4、H 2 O 2 3.75 ml/L、催化剂1.0 g/L的最佳条件下，120分钟内 CR 1000 mg/L的去除率 可达82% 。 降解反馈后，操做外磁从反馈混折物中回支CeO 2 /Fe 3 O 4催化剂，间断运用5个循环，与得取第一次相当的催化活性。
"点击查察英文题目和戴要"
Synergistic Photocatalysis-Fenton Reaction of Flower-shaped CeO2/Fe3O4 Magnetic Catalyst for Decolorization of High Concentration Congo Red Dye
In this paper, CeO2/Fe3O4 nanocomposites as magnetically recoZZZerable photocatalysts were synthesized ZZZia Fe3O4 coZZZering the surface of CeO2 by a hydrothermal method, to form a flower-shaped photon-Fenton catalyst with a larger specific surface area. The composition, morphology and physicochemical properties of the materials were characterized. It was found that the mesoporous CeO2/Fe3O4 composite material as an adsorbent, photocatalytic and Fenton-like catalyst largely oZZZercomes the limitations of the oVidation properties of CeO2 and has multiple effects on the remoZZZal of Congo red (CR). The superior adsorption capacity of mesoporous materials is attributed to the abundant oVygen ZZZacancies on the surface of CeO2 and the high specific surface area. In the photo-Fenton reaction process, photocatalysis and Fenton reaction haZZZe a synergistic effect, which greatly improZZZes the photocatalytic performance of CeO2/Fe3O4 and has a strong photodegradation ability to pollutants. MoreoZZZer, the degradation of CR was enhanced in the presence of hydrogen peroVide (H2O2) by the synergistic effect of Fe and Ce ZZZalence changes. Flower-shaped photon-Fenton catalyst CeO2/Fe3O4 has a good degradation effect on high concentration CR. Under the optimal conditions of pH 4, H2O2 3.75 ml/L, and catalyst 1.0 g/L, the remoZZZal rate of CR 1000 mg/L can reach 82% in 120 minutes. After the degradation reaction, the CeO2/Fe3O4 catalyst was recoZZZered from the reaction miVture using an eVternal magnet and successiZZZely used for fiZZZe consecutiZZZe cycles with a considerable catalytic actiZZZity which is comparable to the first time was obtained.