介孔材料
催化作用
气凝胶
化学工程
降级(电信)
可重用性
路易斯酸
污染物
材料科学
化学
纳米技术
有机化学
工程类
电信
程序设计语言
软件
计算机科学
作者
Somayeh Ostovar,Gholamreza Moussavi,Samira Mohammadi,María Marín,Francisco Boscá,Ander Diego-Lopez,Stefanos Giannakis
标识
DOI:10.1016/j.seppur.2023.126118
摘要
Herein, we optimized the catalytic ozonation process (COP) by engineering the morphology of versatile mesoporous Ti/γAl2O3 materials. Ti-doped γAl2O3 catalysts were synthesized as xerogels, ambigels, and aerogels for p-chlorobenzoic acid (pCBA) ozonation. The roles of Lewis acids and basic sites in Ti/γAl2O3 were investigated along with the synthesis parameters affecting the morphology, structure, and surface acidity. The incorporation of Ti4+ increased the surface acidity, resulting in an effective COP. Full characterization confirmed the uniform Ti distribution and well-defined acidic properties. The sole ozonation process was insufficient, while 0.5 g/L catalyst addition rapidly degraded 50 mg/L pCBA (xerogel: 30 min, ambigel/aerogel: 60 min) while showing excellent reusability and robustness under ions’ presence. EPR analysis suggested pCBA removal via bulk •OH and less by O3 and O2•--mediated reactions, without 1O2 generation. Based on the above findings, we propose an integrated pCBA degradation pathway, providing insights into enhancing the COP for organic pollutant degradation via novel, cheap, and sustainable mesoporous materials.
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