The deployment of an efficient catalyst is critical for successful application of peroxymonosulfate-based advanced oxidation processes to the rapid degradation of retardant organics in wastewater. Considering the rich properties of perovskite oxides and their drawbacks of low specific area and easy cation leaching, we reported a facile postsynthesis hydrothermal treatment method for preparing SrCo_0.6Ti_0.4O_3−δ@CoOOH ([email protected]) nanocomposite as an efficient catalyst for PMS activation here. Surprisingly, CoOOH nanosheets were grown in situ over the surface of SCT substrate, resulting in a significantly increased surface area (22.1 m² g^–1), enhanced charge transfer capability, more generated surface oxygen defects and a strongly synergistic effect created between the bulk SCT and CoOOH surface layer. Remarkably, [email protected] exhibited higher (1.7 times) catalytic activity (0.84 mg L^–1 min^–1) for phenol degradation than SCT. Additionally, suppressed cobalt leaching was demonstrated in the [email protected]/PMS system. Notably, singlet oxygen as additional oxidative species were formed to accelerate phenol degradation in the radical-based [email protected]/PMS system due to the surface oxygen defects. The beneficial effect of higher pH value and different influence of foreign anions on the reation rate were also investigated. As a universal method, it may be also useful for the development of innovative functional materials for other various applications.

中文翻译：

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SrCo _0.6 Ti _0.4 O _3−δ钙钛矿表面上CoOOH纳米结构的后合成生长，用于增强有机污染物的降解

高效催化剂的部署对于成功地将基于过氧一硫酸盐的高级氧化工艺成功应用于废水中的阻滞性有机物的快速降解至关重要。考虑到钙钛矿氧化物的丰富特性及其比表面积低和阳离子易于浸出的缺点，我们报道了一种简便的合成后水热处理方法，以制备作为有效催化剂的SrCo _0.6 Ti _0.4 O3 _-δ @CoOOH（[电子邮件保护]）纳米复合材料在这里激活PMS。令人惊讶的是，CoOOH纳米片原位生长在SCT基底表面上，导致表面积显着增加（22.1 m ² g ^–1），增强的电荷转移能力，更多产生的表面氧缺陷以及在本体SCT和CoOOH表面层之间产生的强烈协同效应。值得注意的是，[受电子邮件保护]表现出更高的（1.7倍）催化活性（0.84 mg L ^–1 min ^–1）比SCT降解苯酚。此外，在[电子邮件保护] / PMS系统中证明了抑制了钴的浸出。值得注意的是，由于表面氧缺陷，形成了单线态氧作为其他氧化性物质，以加速基于自由基的[电子邮件保护] / PMS系统中的苯酚降解。还研究了较高的pH值和外来阴离子对反应速率的不同影响的有益效果。作为一种通用方法，对于开发用于其他各种应用的创新功能材料也可能有用。