Yun Hongjuan, Gao Qingguo, Yan Yin, Yu Yin, Zhang Yuanyuan, Li Chun
Xinjiang Academy of Environmental Protection Science, Urumqi, Xinjiang 830011, China.
Xinjiang Engineering Technology Research Center for Cleaner Production, Urumqi, Xinjiang 830011, China.
ACS Omega. 2024 May 9;9(20):22459-22465. doi: 10.1021/acsomega.4c02493. eCollection 2024 May 21.
In this study, two-dimensional (2D) nanosheet photocatalysts of BiMoO with varying thicknesses were synthesized by adjusting the temperature during the hydrothermal reaction. The thinnest BiMoO nanosheet reached an approximate thickness of ∼4 nm, while the thickest nanosheet measured only ∼16 nm. The photocatalytic performance for Rhodamine B (RhB) degradation was found to be the most effective for the thinnest BiMoO nanosheet, displaying a degradation rate constant of 0.11 min. This rate was 2.5 times higher than that observed for the ∼16 nm thick BiMoO photocatalyst. The enhanced performance of the thinner two-dimensional nanostructure can be attributed to improved separation and migration of photogenerated charges. Additionally, the study identified hydroxyl radicals (•OH) and superoxide radicals (•O) as crucial oxidative species, contributing to the efficient mineralization of RhB dye. This work highlights the controllable synthesis of 2D materials with varying thicknesses and their specific applications in photocatalytic oxidation.
在本研究中，通过调节水热反应过程中的温度，合成了具有不同厚度的二维（2D）钼酸铋纳米片光催化剂。最薄的钼酸铋纳米片厚度约为4纳米，而最厚的纳米片仅测量为约16纳米。发现对于罗丹明B（RhB）降解，最薄的钼酸铋纳米片的光催化性能最为有效，其降解速率常数为0.11分钟。该速率比约16纳米厚的钼酸铋光催化剂观察到的速率高2.5倍。较薄的二维纳米结构性能增强可归因于光生电荷的分离和迁移得到改善。此外，该研究确定羟基自由基（•OH）和超氧自由基（•O）是关键的氧化物种，有助于RhB染料的有效矿化。这项工作突出了具有不同厚度的二维材料的可控合成及其在光催化氧化中的特定应用。
