The ZSM-5@t-ZrO₂ coated composite with t-ZrO₂ as a shell phase, was fabricated using polyelectrolyte-based layer by layer assembly strategy, to enhance the selectivity of methanethiol by the confinement effect of base sites distributed on the shell layer. The study showed that polyelectrolyte functionalization of the t-ZrO₂ surface was crucial to avoid phase separation during the hydrothermal coating process. The fully coated composite obtained via polyelectrolyte modification in order of PDDA⁺/PSS⁻/PDDA⁺ exhibited superior catalytic performance toward methanethiol selectivity of up to 95% and methanol conversion rate close to 90%. Methanethiol selectivity increased by approx. 20% compared with the unmodified composite. The interfacial interaction between the ZSM-5 and t-ZrO₂ phases was related to the coated structure, which subsequently caused a series of favorable alterations to the composite's physicochemical properties. Moreover, the confinement effect produced by the fully coated structure with t-ZrO₂ as the shell phase primarily contributed to enhancement of methanethiol selectivity of ZSM-5@t-ZrO₂ in the thiolation of methanol with H₂S to methanethiol.

采用基于聚电解质的层层组装策略，制备了以t-ZrO ₂为壳相的ZSM-5 @ t-ZrO ₂涂层复合材料，通过限制分布在壳上的碱基来提高甲硫醇的选择性。层。研究表明，t-ZrO ₂表面的聚电解质功能化对于避免水热涂覆过程中的相分离至关重要。完全包覆复合经由聚电解质改性得到的顺序为PDDA ⁺ / PSS ^- / PDDA ⁺对甲醇的选择性高达95％，甲醇转化率接近90％。甲硫醇的选择性提高了约 与未改性的复合材料相比，为20％。ZSM-5和t-ZrO ₂相之间的界面相互作用与涂层结构有关，这随后对复合材料的物理化学性质产生了一系列有利的变化。而且，由t-ZrO ₂作为壳相的完全涂覆结构产生的限制作用主要有助于在甲醇与H ₂ S硫醇化为甲硫醇时提高ZSM-5 @ t-ZrO ₂的甲硫醇选择性。