Abstract Photocatalytic processes are attractive techniques in environmental waste treatment and renewable energy generation. Herein, earth-abundant transition metal (Fe, Cu, or Ni)-impregnated one-dimensional black TiO2 nanocomposites showed upgraded photocatalytic activities in vapor decomposition and hydrogen production compared with reference samples. These results were ascribed to enhanced charge-separation efficiencies, as demonstrated by photoluminescence emission spectroscopy and hydroxyl radical density measurements, and/or enhanced visible-light-absorption efficiencies. The photocatalytic activities depended on the initial concentration of pollutant and relative humidity in the case of pollutant decomposition, whereas they depended on the type and composition of the hole scavenger in the case of hydrogen production.

中文翻译：

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在模拟太阳辐射下使用低成本金属/一维黑色二氧化钛纳米复合材料升级有机蒸汽处理和制氢

摘要 光催化过程是环境废物处理和可再生能源发电中有吸引力的技术。在此，与参考样品相比，地球上丰富的过渡金属（Fe、Cu 或 Ni）浸渍的一维黑色 TiO2 纳米复合材料在蒸汽分解和制氢方面表现出更高的光催化活性。这些结果归因于增强的电荷分离效率，如光致发光发射光谱和羟基自由基密度测量所示，和/或增强的可见光吸收效率。在污染物分解的情况下，光催化活性取决于污染物的初始浓度和相对湿度，而在制氢的情况下，它们取决于空穴清除剂的类型和组成。