A Novel Co Coordinated Highly Dispersed Nano Ag/HAP Catalysts in Enhanced Toluene Catalytic Oxidation with Non-Thermal Plasma

IF 2.5 3区物理与天体物理 Q3 ENGINEERING, CHEMICAL

Plasma Chemistry and Plasma Processing Pub Date : 2025-05-05 DOI:10.1007/s11090-025-10570-3

Xuemin Wang, Jiahui Li, Pai Lu, Shixin Liu, Shuyao Zhang, Enpeng Deng, Yuxin Miao, Zhen Zhao

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Abstract

As a volatile organic pollutant, toluene is difficult to be activated and removed at low temperature by conventional thermal catalytic oxidation. Therefore, we reported an Ag-Co bimetallic catalyst which is supported on hydroxyapatite (HAP) and prepared by the equal-volume distribution impregnation method and investigated its performance in toluene oxidation. Enhanced toluene removal was achieved by synergizing plasma with 3Ag/15Co/HAP catalysts at low temperatures, which also improved CO₂ selectivity. Toluene conversion and CO₂ selectivity peaked at 100% and 88%, respectively, at the input power of 13 W, while the removal process demonstrated good stability during a 32 h test. The uniform dispersion of Ag NPs on the carrier facilitates the conversion of filamentary discharge into a more uniform and efficient discharge, promoting the activation of surface oxygen and thereby improving toluene removal efficiency. Additionally, the interaction between Ag and Co generated more surface-active oxygen and lattice defects on the catalyst surface, resulting in excellent low-temperature reducibility.

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新型协同高分散纳米Ag/HAP催化剂在非热等离子体强化甲苯催化氧化中的应用

甲苯是一种挥发性有机污染物，传统的热催化氧化法难以在低温下被活化和去除。为此，本文报道了以羟基磷灰石（HAP）为载体，采用等体积分布浸渍法制备的Ag-Co双金属催化剂，并对其甲苯氧化性能进行了研究。等离子体与3Ag/15Co/HAP催化剂在低温下协同去除甲苯，提高了CO2的选择性。在输入功率为13 W时，甲苯转化率和CO2选择性分别达到100%和88%，而在32 h的测试中，去除过程表现出良好的稳定性。Ag NPs在载体上的均匀分散有利于将丝状放电转化为更均匀高效的放电，促进表面氧的活化，从而提高甲苯的去除效率。此外，Ag和Co之间的相互作用在催化剂表面产生了更多的表面活性氧和晶格缺陷，从而产生了优异的低温还原性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plasma Chemistry and Plasma Processing 工程技术-工程：化工

CiteScore

5.90

自引率

8.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Publishing original papers on fundamental and applied research in plasma chemistry and plasma processing, the scope of this journal includes processing plasmas ranging from non-thermal plasmas to thermal plasmas, and fundamental plasma studies as well as studies of specific plasma applications. Such applications include but are not limited to plasma catalysis, environmental processing including treatment of liquids and gases, biological applications of plasmas including plasma medicine and agriculture, surface modification and deposition, powder and nanostructure synthesis, energy applications including plasma combustion and reforming, resource recovery, coupling of plasmas and electrochemistry, and plasma etching. Studies of chemical kinetics in plasmas, and the interactions of plasmas with surfaces are also solicited. It is essential that submissions include substantial consideration of the role of the plasma, for example, the relevant plasma chemistry, plasma physics or plasma–surface interactions; manuscripts that consider solely the properties of materials or substances processed using a plasma are not within the journal’s scope.