Nanostructured InO was grown on TiO NPs by thermal treatment of the solids mixture of TiO with the parent In(OH) The effect of calcination temperature in the range between 400 °C and 700 °C was investigated and peculiar changes both in the structure and in the catalytic activity of the TiO/InO heterostructure were revealed. It was found out that T = 600 °C is the best operating temperature for hydrogen production and in combination with 3.5 wt% InO the H production from water reached the value of 3.5 mmol/hg irradiating in the UV–Vis region. Once 5.0 wt% CuO nanoparticles were loaded on TiO/InO, the photocatalytic activity boosted to 9.6 mmol/hg of H, overcoming the hydrogen production of pristine TiO by a factor of 48. This result can be attributed to the formation of a highly efficient heterojunction that assures a synergistic cooperation among the three semiconductors yielding an improved charge separation and faster charge transport, as evidenced by Mott-Schottky, PL and EIS measures.

中文翻译：

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设计 TiO2 和 In2O3 之间的异质结以提高太阳能驱动的氢气生产

通过对 TiO2 与母体 In(OH)2 的固体混合物进行热处理，在 TiO2 纳米颗粒上生长纳米结构的 InO。研究了 400 °C 至 700 °C 范围内的煅烧温度的影响，发现了结构和性能的特殊变化。揭示了TiO/In2O异质结构的催化活性。结果发现，T = 600 °C 是产氢的最佳操作温度，与 3.5 wt% InO 结合，在紫外-可见光区域照射下，从水中产氢达到 3.5 mmol/hg 的值。一旦将 5.0 wt% CuO 纳米粒子负载到 TiO2/In2O3 上，光催化活性就会提高到 9.6 mmol/hg H，将原始 TiO2 的产氢能力提高了 48 倍。这一结果可归因于高效光催化反应的形成。异质结确保三种半导体之间的协同合作，从而改善电荷分离和更快的电荷传输，如莫特-肖特基、PL 和 EIS 测量所证明的那样。