In this paper, V-Mo co-doped akaganeite (β-FeOOH) was prepared by one-pot hydrothermal method and the oxidative desulfurization (ODS) of dibenzothiophene over the catalyst was carefully investigated. 0.07 g (ca. 0.35 wt% of model oil) of catalyst induced 100 % of DBT removal in 60 min with a O/S of 20:1 under 60 °C for the model oils with any of the sulfur contents, 100 ppm, 500 ppm, or 1000 ppm. Moreover, the DBT removal after recycling 4 times is still 100 % and it only declines to 98.04 % in the fifth cycle, which indicates that the catalyst has a good stability and recycling performance. Doping V species in Mo doped β-FeOOH not only initiates a micro-variation in catalyst structure and the resultant more active •OH species but also forms a more stable structure of the catalyst, enabling the catalyst to exhibit a higher ODS reaction rate and a better reusability. The GC-MS analyses demonstrated that the DBT was converted to DBTO₂ by two steps: (1) DBT→ DBTO; (2) DBTO→ DBTO₂, and the former is the rate-limiting step.

中文翻译：

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V-Mo 共掺杂赤金石上二苯并噻吩的氧化脱硫


本文采用一锅水热法制备了 V-Mo 共掺杂赤金石 （β-FeOOH），并仔细研究了二苯并噻吩在催化剂上的氧化脱硫 （ODS）。0.07 g（约 0.35 wt% 的模型油）催化剂可在 60 分钟内诱导 100% 的 DBT 去除，对于 60 °C 下硫含量为 100 ppm、500 ppm 或 1000 ppm 的模型油，O/S 为 20：1。此外，回收 4 次后的 DBT 去除率仍然是 100%，在第 5 次循环中仅下降到 98.04%，这表明催化剂具有良好的稳定性和回收性能。Mo 掺杂 β-FeOOH 中的掺杂 V 物质不仅引发了催化剂结构的微变化，从而产生了更活跃的 •OH 物质，而且还形成了更稳定的催化剂结构，使催化剂表现出更高的 ODS 反应速率和更好的可重用性。GC-MS 分析表明，DBT 通过两个步骤转换为 DBTO₂：（1） DBT→ DBTO;（2） DBTO→ DBTO₂，前者是限流步骤。