Abstract
A new type of photocatalytic La3+–Zn2+–Al3+–MoO42− layered double hydroxide (LDH) material (molar ratio, La/Zn/Al = 1:7:2) was prepared by a complexing agent-assisted homogeneous precipitation technique. The structure of the prepared LDH material was systematically studied. Under UV irradiation, the desulfurization efficiency of the LDH material was 87% in 2 h. For La3+–Zn2+–Al3+–MoO42− LDH material, the introduction of MoO42− increased the interlayer space for promoting the adsorption of benzothiophene (BT), and MoO42− might provide active sites for the oxidation of BT, resulting in the high desulfurization efficiency.
Highlights
Sulfur compounds produced in the production and use of fuel have gradually become one of the main pollutants which affect air quality
A certain amount of 30% hydrogen peroxide solution, the La3?–Zn2?–Al3?– MoO42- layered double hydroxide (LDH) catalyst and the model oil were added to a quartz tube
The diffraction peaks of the materials were the same as the characteristic of LDH materials, and no other diffraction peaks corresponding to complex phases were observed, which revealed the purity of the samples
Summary
Sulfur compounds produced in the production and use of fuel have gradually become one of the main pollutants which affect air quality. It is an important issue to reduce the content of sulfur-containing compounds such as thiophene, benzothiophene, dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (DMDBT) to very low levels to prevent air pollution during the combustion of commercial diesel or gasoline (Fallah et al 2014). Various methods such as adsorption desulfurization (ADS) (Fallah and Azizian 2012; Wang et al 2011; Miao et al 2015), biodesulfurization (BDS) (Ismi et al 2017; Paixao et al 2016), extraction desulfurization (EDS) (Yu et al 2017) and oxidative desulfurization (ODS) (Hao et al 2017) have been reported. La3?–Zn2?–Al3?–MoO42- LDHs catalyst showed high desulfurization efficiency and stability
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