The two-dimensional (2D) photocatalysts have been paid intensive attention in catalysis due to their excellent activity, which was greatly improved by the higher exposure of active sites and a facile reaction platform, and the separation efficiency of charge carriers. Herein, TiO₂(B) nanosheets, which were synthesized via solvothermal method in ethylene glycol, could photocatalytically oxidize benzyl alcohol to benzaldehyde with high selectivity. The study revealed that the material's photocatalytic performance is highly influenced by the surface-chelated ethylene glycol. The pristine TiO₂(B) was effective in selectively photocatalytic oxidizing benzyl alcohol, achieving a 94.5 % conversion, while the conversion decreased to 55 % after the elimination of the surface ethylene glycol. The presence of ethylene glycol on the surface of TiO₂(B) nanosheets benefits the transfer of photogenerated charge carriers and improves charge separation efficiency. It is favorable for the selective formation of singlet oxygen (¹O₂) species, which results in enhanced photocatalytic activity and selectivity. We believe that our findings can shed light on the importance of the surface species and properties of photocatalysts in photocatalysis, and pave an avenue for the design and preparation of high-efficiency photocatalysts with unique surface properties.

二维（2D）光催化剂因其优异的活性而受到催化领域的广泛关注，其活性位点的暴露度更高、反应平台更容易、载流子的分离效率大大提高。其中，在乙二醇中通过溶剂热法合成的TiO _{2 (B)纳米片可以高选择性地光催化氧化苯甲醇生成苯甲醛。}研究表明，该材料的光催化性能很大程度上受表面螯合乙二醇的影响。原始的TiO ₂ (B)能够有效地选择性光催化氧化苯甲醇，实现了94.5%的转化率，而在消除表面乙二醇后转化率下降至55%。_{TiO 2} (B)纳米片表面乙二醇的存在有利于光生载流子的转移并提高电荷分离效率。它有利于单线态氧（¹ O ₂）物种的选择性形成，从而增强光催化活性和选择性。我们相信，我们的研究结果可以阐明光催化剂的表面种类和性能在光催化中的重要性，并为设计和制备具有独特表面性能的高效光催化剂铺平道路。