Abstract In recent decades, highly efficient deep desulfurization processes have become very necessary to decrease environmental pollution due to sulfur emissions from fuels. Herein, an enhanced photocatalytic desulfurization of a model fuel was investigated under sunlight irradiation using H2O2 as the oxidant and Ag@AgBr loaded mesoporous silica Al-SBA-15 as a catalyst. In this study, the photocatalyst (Ag@AgBr/Al-SBA-15) was synthesized via a chemical deposition using halloysite clay as the silica–aluminum source and characterized by X-ray diffraction, N2 adsorption, scanning electron microscopy, transmission electron microscopy, and UV–Vis diffuse reflectance spectroscopy (UV–Vis DRS). The UV–Vis DRS results revealed that the light absorption expanded to the visible region (λ > 400 nm) for the various Ag@AgBr nanoparticles doped in the mesoporous Al-SBA-15 material. The 30% Ag@AgBr/Al-SBA-15 sample with a 30% Ag@AgBr doping exhibited enhanced photocatalytic activity and showed high stability even after four successive cycles. The results demonstrated that initial dibenzothiophene concentrations (500 ppm) reached 98.66% removal with 50 mg of the catalyst dosage, 1.0 mL of H2O2, for 360 min of sunlight irradiation at 70 °C.

中文翻译：

---

天然埃洛石衍生的Ag@AgBr/Al-SBA-15绿色催化剂在阳光照射下高效光催化氧化脱硫二苯并噻吩

摘要 近几十年来，高效的深度脱硫工艺对于减少燃料硫排放造成的环境污染变得非常必要。在这里，使用 H2O2 作为氧化剂和 Ag@AgBr 负载的介孔二氧化硅 Al-SBA-15 作为催化剂，在阳光照射下研究了模型燃料的增强光催化脱硫。在这项研究中，光催化剂（Ag@AgBr/Al-SBA-15）是通过化学沉积合成的，使用埃洛石粘土作为硅铝源，并通过 X 射线衍射、N2 吸附、扫描电子显微镜、透射电子显微镜进行表征。 , 和 UV-Vis 漫反射光谱 (UV-Vis DRS)。UV-Vis DRS 结果表明光吸收扩展到可见光区 (λ > 400 nm）用于掺杂在介孔 Al-SBA-15 材料中的各种 Ag@AgBr 纳米颗粒。掺杂 30% Ag@AgBr 的 30% Ag@AgBr/Al-SBA-15 样品表现出增强的光催化活性，即使在连续四次循环后也表现出高稳定性。结果表明，初始二苯并噻吩浓度 (500 ppm) 达到 98.66%，使用 50 mg 催化剂剂量，1.0 mL H2O2，在 70 °C 下进行 360 分钟的阳光照射。