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通过轻松调节CeO2形态,低温高效的催化去除有气味的碳硫化物

Yanan Hu¹, Chenhao Gong², Peng Chen²

¹Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China; The Key Laboratory of Yunnan Province for Synthesizing Sulfur-containing Fine Chemicals, The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, China.

Journal of hazardous materials

|February 7, 2025

概括

球形氧化物 (CeO2-S) 纳米催化剂在低温下有效地化碳硫化物 (COS). 在CeO2-S中空缺的氧气增强了水的激活和基组的产生,改善了催化性能和硫化合物去除的稳定性.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
环境化学环境化学

背景情况:

水激活对于有机硫化合物的催化水解至关重要,但其机制尚不清楚.
了解催化剂结构在促进水激活中的作用,对于有效去除硫化合物至关重要.

研究的目的:

为了研究氧化 (CeO2) 纳米催化剂形态在低温下对硫化碳 (COS) 水解的影响.
阐明水激活的机制和氧空缺 (VO) 在增强催化活性中的作用.

主要方法:

合成不同形态的CeO2纳米催化剂 (棒,八面体,球体,立方体).
使用各种技术进行表征,并对COS水解进行催化试验.
在现场扩散反射红外里埃变换光谱 (DRIFTS) 和密度函数理论 (DFT) 的计算.

主要成果:

球形CeO2 (CeO2-S) 在60°C时表现出完全的COS转换,稳定30小时,表现优于其他形态.
CeO2-S 呈现出较高的氧空位 (VO) 度,从而协同增强了水激活和表面基组生成.
CeO2 的 (111) 晶体平面显示出最强的COS吸附,有助于改善水解.

结论:

CeO2纳米催化剂形态显著影响COS水解活动,球形是最佳的.
氧气空缺和暴露 (111) 面是增强水激活和COS吸附的关键因素,用于高效的低温水解.
这项研究提供了关于设计富含基的CeO2催化剂的见解,以有效地去除各种有机硫化合物.

关键词:

碳尼尔硫化物是什么这种材料是CeO(2) 材料.气味污染控制气味污染控制有一个空缺的氧气.反应机制的反应机制

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