In this article, Mn doping on Ce-based γ-Al₂O₃ (i.e., Mn-Ce-γ-Al₂O₃) was synthesized and then employed as catalysts to study the removal of phenol from aqueous solutions through catalytic ozonation process. The results showed that the phenol removal was remarkably increased to 97.50% if Mn-Ce-γ-Al₂O₃ was adopted as the catalyst. In addition, the kinetic rate of the reaction was increased, approximately, about 1.49 times when using Ce-γ-Al₂O₃ catalyst with Mn doping. Moreover, X-ray diffraction, transmission electron microscopy, Brunner-Emmet-Teller measurements, and X-ray photoelectron spectroscopy techniques were used to comprehensively characterize the physicochemical properties of the synthesized Mn-Ce-γ-Al₂O₃ catalyst, including the phases, morphologies, textural properties, and dispersity of the surface active species. More uniform channel mesoporous structures were obtained after Mn doping on Ce-γ-Al₂O₃, which could enhance the gas-liquid mass transfer rate, surface hydroxyl groups, Ce³⁺/Ce⁴⁺ ratio, and the formation of Mn-Ce solid solution. In this study, the effects of Mn doping on Ce-based γ-Al₂O₃ on phenol degradation were investigated and the removal mechanisms were suggested for a better understanding of the improved removal efficiency.

中文翻译：

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Mn 掺杂对 Ce 基 γ-Al2O3 苯酚降解催化剂的作用

本文合成了Mn掺杂Ce基γ-Al ₂ O ₃（即Mn-Ce-γ-Al ₂ O ₃），并以此为催化剂研究了催化臭氧化去除水溶液中苯酚的过程。 . 结果表明，采用Mn-Ce-γ-Al ₂ O ₃作为催化剂，苯酚去除率显着提高至97.50% 。此外，当使用 Ce-γ-Al ₂ O ₃时，反应的动力学速率提高了大约 1.49 倍Mn掺杂催化剂。此外，利用 X 射线衍射、透射电子显微镜、Brunner-Emmet-Teller 测量和 X 射线光电子能谱技术全面表征了合成的 Mn-Ce-γ-Al ₂ O ₃催化剂的物理化学性质，包括表面活性物质的相、形态、结构特性和分散性。_{Mn掺杂Ce-γ-Al 2} O ₃后，获得了更均匀的通道介孔结构，可提高气液传质速率、表面羟基、Ce ³⁺ /Ce ⁴⁺比和Mn-的形成。 Ce 固溶体。在本研究中，Mn 掺杂对 Ce 基 γ-Al _2的影响研究了O ₃对苯酚降解的影响，并提出了去除机制，以更好地了解提高的去除效率。