A novel dendritic composite (TD) with an open center-radial pore structure using TS-1 nanocrystals as microporous precursors was successfully synthesized by a facile method. TS-1 nanocrystals were embedded into the framework of dendritic mesoporous silica nanospheres (DMSNs) to form Si–O–Ti bonds, which was beneficial for generating more S vacancies of MoS₂ active phases. The NiMo/TD-2 catalyst had a larger surface area and stronger metal–support interaction, resulting in higher sulfidation and dispersion degrees of MoS₂ active phases over the sulfided NiMo/TD-2 catalyst, which was consequently favored to improve the hydrodesulfurization (HDS) activity of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). Furthermore, the NiMo/TD-2 catalyst with an SiO₂/TiO₂ molar ratio of 150 exhibited higher HDS performance for DBT and 4,6-DMDBT than other NiMo/TD catalysts and the commercial NiMo/Al₂O₃ catalyst. Moreover, the NiMo/TD-2 catalyst possessed more Brønsted and Lewis acid sites, thus promoting the hydrogenation of DBT and the isomerization of 4,6-DMDBT.

以一种简便的方法成功地合成了一种以TS-1纳米晶体为微孔前体的具有开放的中心径向孔结构的树枝状复合材料（TD）。TS-1纳米晶体被嵌入树状介孔二氧化硅纳米球（DMSN）的框架中以形成Si-O-Ti键，这有利于产生更多的MoS ₂活性相的S空位。NiMo / TD-2催化剂具有更大的表面积和更强的金属-载体相互作用，导致MoS ₂活性相的硫化度和分散度高于硫化NiMo / TD-2催化剂，因此有利于提高加氢脱硫率（二苯并噻吩（DBT）和4,6-二甲基二苯并噻吩（4,6-DMDBT）的HDS活性。此外，具有SiO ₂的NiMo / TD-2催化剂/ TiO ₂摩尔比为150的DBT和4,6-DMDBT的HDS性能高于其他NiMo / TD催化剂和市售NiMo / Al ₂ O ₃催化剂。此外，NiMo / TD-2催化剂具有更多的布朗斯台德和路易斯酸位，从而促进了DBT的氢化和4,6-DMDBT的异构化。