Separation of aromatic organosulfur compounds is vital for upgrading the feed to clean fuel products, however, it remains a formidable challenge for the present adsorbents. Herein, a series of novel aerogel-like boron carbon nitride (BCN) with three-dimensional interconnected porous networks were fabricated via a hydrogel template and freeze-casting strategy. The as-prepared aerogel-like BCN had a variable carbon content and a flexible size of graphene domain on its porous structure. The optimal BCN aerogel represents the top-level of adsorptive desulfurization (ADS) capacity for aromatic organosulfur compounds (30.8 mg S/g adsorbent), strikingly higher than the state-of-the-art aerogels adsorbents (17.1 mg S/g adsorbent) reported under similar conditions. A selective adsorption for dibenzothiophene in the presence of aromatic hydrocarbons, nitrogen compounds were also achieved on BCN aerogel. The adsorption isotherm and XPS measurement reveal heterogeneous adsorption on the BCN aerogel via π–π and Lewis acid–base interactions.

中文翻译：

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三元杂化硼碳氮化物气凝胶高性能吸附脱硫

芳香族有机硫化合物的分离对于将进料升级为清洁燃料产品至关重要，但是，对于目前的吸附剂来说，它仍然是一个艰巨的挑战。在此，通过水凝胶模板和冷冻浇铸策略制造了一系列具有三维互连多孔网络的新型气凝胶状氮化硼（BCN）。所制备的气凝胶样 BCN 在其多孔结构上具有可变的碳含量和灵活的石墨烯域尺寸。最佳 BCN 气凝胶代表了芳香族有机硫化合物（30.8 mg S/g 吸附剂）的最高吸附脱硫 (ADS) 能力，显着高于最先进的气凝胶吸附剂（17.1 mg S/g 吸附剂）在类似条件下报告。在芳烃存在下选择性吸附二苯并噻吩，在 BCN 气凝胶上也实现了氮化合物。吸附等温线和 XPS 测量揭示了通过 π-π 和路易斯酸碱相互作用在 BCN 气凝胶上的异质吸附。