Engineering Dual Oxygen Simultaneously Modified Boron Nitride for Boosting Adsorptive Desulfurization of Fuel
Jing Luo,
Yanchen Wei,
Yanhong Chao,
Chao Wang,
Hongping Li,
Jun Xiong,
Mingqing Hua,
Huaming Li,
Wenshuai Zhu
Affiliations
Jing Luo
School of Chemistry and Chemical Engineering & Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China; State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China
Yanchen Wei
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
Yanhong Chao
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China; School of Pharmacy, Jiangsu University, Zhenjiang 212013, China
Chao Wang
School of Chemistry and Chemical Engineering & Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
Hongping Li
School of Chemistry and Chemical Engineering & Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
Jun Xiong
School of Chemistry and Chemical Engineering & Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
Mingqing Hua
School of Chemistry and Chemical Engineering & Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
Huaming Li
School of Chemistry and Chemical Engineering & Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
Wenshuai Zhu
School of Chemistry and Chemical Engineering & Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China; State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China; Corresponding author.
Oxygen atoms usually co-exist in the lattice of hexagonal boron nitride (h-BN). The understanding of interactions between the oxygen atoms and the adsorbate, however, is still ambiguous on improving adsorptive desulfurization performance. Herein, simultaneously oxygen atom-scale interior substitution and edge hydroxylation in BN structure were constructed via a polymer-based synthetic strategy. Experimental results indicated that the dual oxygen modified BN (BN–2O) exhibited an impressively increased adsorptive capacity about 12% higher than that of the edge hydroxylated BN (BN–OH) fabricated via a traditional method. The dibenzothiophene (DBT) was investigated to undergo multi-molecular layer type coverage on the BN–2O uneven surface via π–π interaction, which was enhanced by the increased oxygen doping at the edges of BN–2O. The density functional theory calculations also unveiled that the oxygen atoms confined in BN interior structure could polarize the adsorbate, thereby resulting in a dipole interaction between the adsorbate and BN–2O. This effect endowed BN–2O with the ability to selectively adsorb DBT from the aromatic-rich fuel, thereafter leading to an impressive prospect for the adsorptive desulfurization performance of the fuel. The adsorptive result was in good accordance with Freundlich and pseudo-second-order adsorption kinetics model results. Therefore, the designing of a polymer-based strategy could be also extended to other heteroatom doping systems to enhance adsorptive performance.
