Abstract Single-crystal heterostructured Au/BTO nanoparticles were fabricated successfully through a simple hydrothermal process. The prepared heterostructured nanoparticles were characterized by XRD, SEM, HRTEM, UV–vis adsorption spectroscopy and XPS. Results display that Au nanoparticles with the size of ∼5 nm loaded on the surface of the ferroelectric tetragonal phase BTO nanoparticles. The heterostructured photocatalyst showed an enhanced photocatalytic activity toward the degradation of RhB under UV light irradiation. Transient photovoltage (TPV) spectra results demonstrated that the pure BTO and Au/BTO 5.0 wt% show negative TPV signal. Moreover, TPV results demonstrated that the Au loading boosted the separation and transmission of photoinduced carriers under UV light. Furthermore, the ferroelectric polarization not only promoted the fast separation of photogenerated carriers but also prolonged the carrier lifetime. These all enhanced the photocatalytic performance.

中文翻译：

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Au/BaTiO3的铁电极化增强光催化性能和光致载流子行为

摘要 通过简单的水热工艺成功制备了单晶异质结构 Au/BTO 纳米颗粒。通过XRD、SEM、HRTEM、UV-vis吸附光谱和XPS对制备的异质结构纳米粒子进行表征。结果表明，在铁电四方相 BTO 纳米粒子的表面负载了约 5 nm 的 Au 纳米粒子。异质结构光催化剂在紫外光照射下对 RhB 的降解表现出增强的光催化活性。瞬态光电压 (TPV) 光谱结果表明纯 BTO 和 Au/BTO 5.0 wt% 显示负 TPV 信号。此外，TPV 结果表明，Au 负载促进了紫外光下光致载流子的分离和传输。此外，铁电极化不仅促进了光生载流子的快速分离，而且延长了载流子的寿命。这些都增强了光催化性能。