Photocatalytic CO reduction to produce value-added products is considered a promising solution to solve the global energy crisis and the greenhouse effect. In this study, 2D/multi-2D heterostructures were successfully synthesized through electrostatic self-assembly between TiC and TiO nanosheets. The optimal sample (15TC/TiO) shows yields of 209.98 and 28.09 μmol·g·h for CO and CH, respectively. According to the characterization and simulation study, the enhanced performance is mostly attributable to the 2D/multi-2D heterostructures, which are formed from two phases with huge differences in morphology and size, enabling the development of multiple tiny contact surfaces to increase the effective contact area. In addition, the TiO nanosheets utilized in the construction have up to 80 % exposure to the (001) facets, which offer catalytically active sites. This work provides a feasible method for constructing 2D/multi-2D heterostructure catalyst materials.

中文翻译：

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建筑工程实现高稳定性 2D/多 2D 异质结构 MXene/TiO2，以促进太阳能驱动的二氧化碳减排

光催化二氧化碳还原生产增值产品被认为是解决全球能源危机和温室效应的有前途的解决方案。在这项研究中，通过TiC和TiO纳米片之间的静电自组装成功合成了2D/多2D异质结构。最佳样品 (15TC/TiO) 的 CO 和 CH 产率分别为 209.98 和 28.09 μmol·g·h。根据表征和模拟研究，性能的增强主要归因于二维/多二维异质结构，它们由形态和尺寸差异巨大的两相形成，能够形成多个微小接触表面以增加有效接触区域。此外，该结构中使用的 TiO 纳米片有高达 80% 的暴露于 (001) 面，这提供了催化活性位点。该工作为构建二维/多二维异质结构催化剂材料提供了一种可行的方法。