Hou Liwei, Wang Yanan, Zhou Fan, Liu Shuangyue, Fu Lin, Wang Lei, Zhang Changbo, Xue Weijie
College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China.
Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
Nanomaterials (Basel). 2023 Apr 17;13(8):1388. doi: 10.3390/nano13081388.
Perovskites with nano-flexible texture structures and excellent catalytic properties have attracted considerable attention for persulfate activation in addressing the organic pollutants in water. In this study, highly crystalline nano-sized LaFeO was synthesized by a non-aqueous benzyl alcohol (BA) route. Under optimal conditions, an 83.9% tetracycline (TC) degradation and 54.3% mineralization were achieved at 120 min by using a coupled persulfate/photocatalytic process. Especially compared to LaFeO-CA (synthesized by a citric acid complexation route), the pseudo-first-order reaction rate constant increased by 1.8 times. We attribute this good degradation performance to the highly specific surface area and small crystallite size of the obtained materials. In this study, we also investigated the effects of some key reaction parameters. Then, the catalyst stability and toxicity tests were also discussed. The surface sulfate radicals were identified as the major reactive species during the oxidation process. This study provided a new insight into nano-constructing a novel perovskite catalyst for the removal of tetracycline in water.
具有纳米柔性纹理结构和优异催化性能的钙钛矿在过硫酸盐活化以处理水中有机污染物方面引起了广泛关注。在本研究中，通过非水苯甲醇（BA）路线合成了高结晶度的纳米级LaFeO。在最佳条件下，采用过硫酸盐/光催化耦合工艺，120分钟内四环素（TC）降解率达83.9%，矿化率达54.3%。特别是与通过柠檬酸络合路线合成的LaFeO-CA相比，准一级反应速率常数提高了1.8倍。我们将这种良好的降解性能归因于所得材料的高比表面积和小晶粒尺寸。在本研究中，我们还研究了一些关键反应参数的影响。然后，还讨论了催化剂稳定性和毒性测试。表面硫酸根自由基被确定为氧化过程中的主要活性物种。本研究为纳米构建新型钙钛矿催化剂去除水中四环素提供了新的见解。
