Ostovar Abdollah, Larimi Afsanehsadat, Jiang Zhi, Lotfi Marzieh, Ghotbi Cyrus, Khorasheh Farhad
Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran.
Department of Chemical and Process Engineering, Niroo Research Institute, Tehran, Iran.
Environ Sci Pollut Res Int. 2024 Mar;31(12):18188-18199. doi: 10.1007/s11356-023-26597-y. Epub 2023 Mar 23.
Modification of photocatalysts to improve their adsorption and photocatalytic activity in the oxidative desulfurization of liquid fuels has been reported by many investigators. In this study, Pt-decorated carbon-doped TiO nanoparticles were synthesized by hydrothermal and photo-deposition techniques and were subsequently used in photocatalytic oxidative desulfurization of dibenzothiophene (DBT) in n-heptane as a simulated liquid fuel with methanol as the extracting solvent. Carbon-doped TiO was first synthesized by a simple self-doping method. Pt was then loaded by a photo-deposition technique. The synthesized photocatalysts (labeled as YPt-CT where Y is percent Pt loading) were characterized by of X-ray diffraction (XRD), photoluminescence (PL), field emission scanning electron microscopy (FESEM), N-physisorption, UV-Vis diffusive reflectance spectra (UV-Vis DRS), transmission electron microscopy (TEM), Fourier transform infrared spectra (FTIR), and nitrogen sorption measurements. The removal efficiency of DBT was 98% in the presence of 2 g/l of 0.5Pt-CT catalyst under visible-light irradiation (λ > 400 nm), ambient pressure, and reaction temperature of 40°C.
许多研究者报道了对光催化剂进行改性以提高其在液体燃料氧化脱硫中的吸附和光催化活性。在本研究中，通过水热和光沉积技术合成了铂修饰的碳掺杂二氧化钛纳米颗粒，并随后将其用于以正庚烷为模拟液体燃料、甲醇为萃取溶剂的二苯并噻吩（DBT）的光催化氧化脱硫。碳掺杂二氧化钛首先通过简单的自掺杂方法合成。然后通过光沉积技术负载铂。通过X射线衍射（XRD）、光致发光（PL）、场发射扫描电子显微镜（FESEM）、N-物理吸附、紫外-可见漫反射光谱（UV-Vis DRS）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）和氮吸附测量对合成的光催化剂（标记为YPt-CT，其中Y是铂负载百分比）进行了表征。在2 g/l的0.5Pt-CT催化剂存在下，在可见光照射（λ>400 nm）、常压和40°C的反应温度下，DBT的去除效率为98%。
