Photocatalytic CO reduction plays an important role in solving environmental issues and alleviating the energy crisis. However, it is still challenging to distribute the surface-active site on photocatalysts with efficient separation of carriers in rational. Herein, the Cu species loaded SrTiO nanofiber was constructed through coaxial electrospinning which could realize the dispersion of the Cu site on the one-dimensional (1D) nanofiber structure. The 1D nanofiber with Cu site exhibited superior performance on photocatalytic CO reduction based on the excellent ability of charge separation. The CuO and CuO were determined to be located on the surface of 1D SrTiO nanofiber by the TEM and XPS. The work functions of SrTiO, CuO, and CuO were calculated to be 5.26, 5.47, and 5.51 eV, respectively, suggesting that the carriers could transfer from SrTiO nanofiber to the Cu species. The yield of CHOH with the optimized 8%Cu-SrTiO catalyst could reach 8.08 ± 0.03 µmol⋅g⋅h. This work provided a coaxial electrospinning strategy to load the Cu species active site on the surface of 1D SrTiO nanofiber for enhancing photoreduction CO.

中文翻译：

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同轴静电纺丝制备负载 SrTiO3 的 Cu 物质，用于有效光催化将 CO2 还原为 CH3OH

光催化CO还原对于解决环境问题、缓解能源危机具有重要作用。然而，如何合理分布光催化剂上的表面活性位点并有效分离载流子仍然具有挑战性。在此，通过同轴静电纺丝构建了负载Cu物种的SrTiO纳米纤维，可以实现Cu位点在一维（1D）纳米纤维结构上的分散。具有Cu位点的一维纳米纤维基于优异的电荷分离能力，在光催化CO还原方面表现出优异的性能。通过TEM和XPS确定CuO和CuO位于一维SrTiO纳米纤维的表面。 SrTiO、CuO 和 CuO 的功函数经计算分别为 5.26、5.47 和 5.51 eV，表明载流子可以从 SrTiO 纳米纤维转移到 Cu 物种。优化后的 8%Cu-SrTiO 催化剂的 CHOH 产率可达 8.08 ± 0.03 µmol⋅g⋅h。这项工作提供了一种同轴静电纺丝策略，将 Cu 物种活性位点负载在一维 SrTiO 纳米纤维表面，以增强光还原 CO。