Deep‐sea clays using as active Fenton catalysts for self‐propelled motors
Deep‐sea clays using as active Fenton catalysts for self‐propelled motors
复制标题
深海粘土用作自走式发动机的活性芬顿催化剂
DOI：
10.1111/jace.18348
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发表时间：
2022
影响因子：
3.9
通讯作者：
Shiding Miao
中科院分区：
文献类型：
--
作者：
Peiping Zhang;Xue Sun;Jiankang Guo;Yan Wang;Wei Zhang;Weikun Ning;Wenqing Li;Cundi Wei;Xuefa Shi;Shiding Miao
Raw deep‐sea clays (i.e., pelagic clays) collected from the Indian Ocean were able to function as Fenton catalysts and self‐propelled micromotors due to the high content of Fe‐ and Mn‐. The pelagic clays were for the first time observed to be automatic in the H2O2solution. The pelagic clays existed in the form of poorly crystallized marine sedimentation. The major minerals were found as illite/montmorillonite (I/M) and amorphous ferromanganese nodules, and the minor minerals included kaolinite, quartz, feldspar, and calcite. Significant amounts of oxygen bubbles were generated when the clay particles were dispersed into the H2O2solution (0.1–10.0 wt.%), and the average velocity of the motors was observed as high as 183.0 μm s–1in 10.0 wt.% H2O2. The self‐propulsion would induce vigorous mixing in local areas of the solution and was confirmed to benefit the catalytic performance. The clays were employed to remove Rhodamine B (RhB) for a proof‐of‐concept study. In the acid solution (pH = 1.0–5.0), the removal of RhB was controlled by the Fenton process accompanied by the adsorption of clay particles. In the alkaline solution (pH = 9.0), the removal of RhB was found to follow an adsorptive bubble separation pathway. Both processes were greatly influenced by the self‐motion of MnOxmotors contained in the pelagic clays.
