Diesel soot particulate is one of the main sources of air pollution, which should be eliminated effectively to minimize the carcinogenic and lethal effect of air. Herein, an effort has been made to synthesize Au–CoFe₂O₄ nanocomposite by a facile route and use as an effective catalyst for soot oxidation. The physicochemical properties of Au–CoFe₂O₄ were carried out through SEM, EDX mapping, HRTEM, XRD, XPS, hydrogen temperature-programmed reduction (H₂-TPR), and NO temperature-programmed oxidation (NO-TPO). Au–CoFe₂O₄ catalyst showed a remarkable catalytic property for soot oxidation in both NO + O₂ and O₂ owing to the formation of oxygenated species that enhanced the oxidizing properties of the catalyst. The CoFe₂O₄ composite showed a remarkable and stable catalytic property for soot oxidation, and low T₅₀ (50% soot conversion) 411 °C value has been achieved in the presence of O₂. While as we introduced gold (Au) to form Au–CoFe₂O₄ then its catalytic performance for soot oxidation was found to be tremendously increased to T₅₀ 341 °C owing to the formation of surface-oxygenated species that enhanced the oxidizing properties of the catalyst surface. The durability performance of the catalyst including reusability, this catalyst showed even better soot oxidation activity after sulfur and hydrothermal aging. Owing to the tremendous soot oxidation activity, this catalyst can be used as an environmentally friendly and efficient soot oxidizer for the removal of soot.

柴油机烟尘颗粒是空气污染的主要来源之一，应有效消除，以最大程度地减少空气的致癌性和致死性。在此，已努力通过一种简便的方法合成Au-CoFe ₂ O ₄纳米复合材料，并将其用作烟尘氧化的有效催化剂。Au-CoFe ₂ O ₄的理化特性通过SEM，EDX映射，HRTEM，XRD，XPS，氢程序升温还原（H ₂ -TPR）和NO程序升温氧化（NO-TPO）进行。Au-CoFe ₂ O ₄催化剂在NO + O ₂和O ₂中均显示出显着的烟尘氧化催化性能。由于形成了可增强催化剂氧化性能的氧化物质。CoFe ₂ O ₄复合材料对烟灰氧化显示出显着且稳定的催化性能，并且在O ₂的存在下实现了低T ₅₀（烟灰转化率50％）411°C的值。当我们引入金（Au）形成Au-CoFe ₂ O _4时，发现其对烟尘氧化的催化性能大大提高到T ₅₀341°C是由于形成了表面氧化物质，从而增强了催化剂表面的氧化性能。催化剂的耐久性能包括可重复使用性，该催化剂在硫和水热老化后表现出更好的烟so氧化活性。由于巨大的烟灰氧化活性，该催化剂可用作去除烟灰的环保和有效的烟灰氧化剂。