Enhanced heterogeneous Fenton-like degradation of methylene blue by reduced CuFe(2)O(4).
Enhanced heterogeneous Fenton-like degradation of methylene blue by reduced CuFe(2)O(4).
复制标题
还原 CuFe2O4 增强亚甲基蓝的非均相芬顿降解
DOI：
10.1039/c7ra12488k
复制
发表时间：
2018-01-02
期刊：
影响因子：
3.9
通讯作者：
Xu, Yan
中科院分区：
文献类型：
--
作者：
Qin, Qingdong;Liu, Yahong;Li, Xuchun;Sun, Tian;Xu, Yan
为了促进快速去除染料的氧化过程中，铜铁氧体（CuFe2O4）等温还原在H2流，并用作磁性可分离的过氧化氢（H2O2）的活化催化剂。采用透射电子显微镜、X射线衍射、X射线光电子能谱和磁力仪等技术对还原后的CuFe2O4的物理化学性质进行了表征。在催化实验中，还原态CuFe_2O_4由于具有较高的比表面积和负载量，对亚甲基蓝（MB）的去除表现出了上级的催化活性。还原后的CuFe_2O_4中有少量金属离子析出，这些金属离子可作为均相芬顿催化剂降解亚甲基蓝。考察了pH值、催化剂用量、H2O2浓度等因素对反应的影响。自由基抑制实验和电子自旋共振（ESR）光谱表明，主要的反应物种是羟基自由基（stecOH）。此外，还原态CuFe2O4在反应结束后可通过外加磁铁分离，循环使用5次后仍保持良好的活性，在染料废水处理中具有良好的长期应用前景。CuFe_2O_4被还原用于过氧化氢的活化，还原后的CuFe_2O_4表现出相对较高的催化活性。
To facilitate rapid dye removal in oxidation processes, copper ferrite (CuFe2O4) was isothermally reduced in a H2 flow and used as a magnetically separable catalyst for activation of hydrogen peroxide (H2O2). The physicochemical properties of the reduced CuFe2O4 were characterized with several techniques, including transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and magnetometry. In the catalytic experiments, reduced CuFe2O4 showed superior catalytic activity compared to raw CuFe2O4 for the removal of methylene blue (MB) due to its relatively high surface area and loading Fe0/Cu0 bimetallic particles. A limited amount of metal ions leached from the reduced CuFe2O4 and these leached ions could act as homogeneous Fenton catalysts in MB degradation. The effects of experimental parameters such as pH, catalyst dosage and H2O2 concentration were investigated. Free radical inhibition experiments and electron spin resonance (ESR) spectroscopy revealed that the main reactive species was hydroxyl radical (˙OH). Moreover, reduced CuFe2O4 could be easily separated by using an external magnet after the reaction and remained good activity after being recycled five times, demonstrating its promising long-term application in the treatment of dye wastewater. CuFe2O4 was reduced for activation of hydrogen peroxide and the reduced CuFe2O4 showed a relatively higher catalytic activity.
登录
查看更多内容
影响因子：
9.8
作者：
Wan, Dong;Li, Wenbing;Wei, Xiaobi
通讯作者：
Wei, Xiaobi
将铁铜双金属颗粒原位掺入电纺碳纳米纤维中作为高效芬顿催化剂
影响因子：
22.1
作者：
Wang, Jing;Liu, Chao;Wang, Lianjun
通讯作者：
Wang, Lianjun
影响因子：
15.1
作者：
Shahwan, T.;Abu Sirriah, S.;Hallam, K. R.
通讯作者：
Hallam, K. R.
影响因子：
11.4
作者：
Kwan, WP;Voelker, BM
通讯作者：
Voelker, BM
影响因子：
1.7
作者：
Grosvenor, AP;Kobe, BA;McIntyre, NS
通讯作者：
McIntyre, NS