Effective p-cresol removal through catalytic liquid-phase oxidation under moderate conditions using Pt/CeO2-ZrO2-SnO2/SBA-16 as a catalyst
Effective p-cresol removal through catalytic liquid-phase oxidation under moderate conditions using Pt/CeO2-ZrO2-SnO2/SBA-16 as a catalyst
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DOI：
10.1080/21870764.2020.1712800
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发表时间：
2020-01
影响因子：
2.3
通讯作者：
A. R. Supandi;Naoyoshi Nunotani;N. Imanaka
中科院分区：
文献类型：
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作者：
A. R. Supandi;Naoyoshi Nunotani;N. Imanaka
摘要 甲酚是工业废水中常见的酚类化合物之一。最值得注意的是，对甲酚在所有甲酚异构体中具有最高的毒性和对皮肤的渗透性影响。因此，去除对甲酚的废水处理是一个重要问题。本研究旨在确定一种在温和条件下通过催化氧化有效去除对甲酚的方法。为此，我们在SBA-16载体上负载Pt作为活化剂，CeO2-ZrO2-SnO2作为促进剂，合成了Pt/CeO2-ZrO2-SnO2/SBA-16催化剂。就促进剂而言，ZrO2和SnO2的引入改善了其氧化还原性能，而Ce0.68Zr0.17Sn0.15O2优异的氧化还原性能促进了氧化铂离子(Pt2+)的生成，与金属铂(Pt0)相比，其具有较高的酚类化合物氧化能力。所制备的催化剂中，高Pt2+含量的Pt/CeO2-ZrO2-SnO2/SBA-16对对甲酚氧化表现出最高的催化活性，在常压、80℃、4h的温和反应条件下，对甲酚完全脱除。
ABSTRACT Cresol is among the phenolic compounds that are frequently found in industrial wastewater streams. Most notably, p-cresol has the highest toxicity and the highest permeability effect on skin of all the cresol isomers; hence, wastewater treatment for p-cresol removal is an important issue. This study was aimed at determining a method of removing p-cresol effectively under moderate conditions by catalytic oxidation. To this end, we synthesized a Pt/CeO2-ZrO2-SnO2/SBA-16 catalyst by supporting Pt as the activator and CeO2-ZrO2-SnO2 as the promoter on an SBA-16 support. As concerns the promoter, the introduction of ZrO2 and SnO2 improved its redox properties, and the superior redox properties of Ce0.68Zr0.17Sn0.15O2 facilitated generation of oxidized platinum ions (Pt2+) with a high phenolic compound oxidation capability compared to metallic platinum (Pt0). Among the catalysts prepared, Pt/CeO2-ZrO2-SnO2/SBA-16 with high Pt2+ content exhibited the highest catalytic activity for p-cresol oxidation, and p-cresol was completely removed under moderate reaction conditions of 80°C for 4 h under atmospheric pressure.