Abstract We report on an experimental study aimed at optimizing the radiocatalytic properties of pure and copper-incorporated TiO 2 powders. This has been achieved by conducting cross-checked structural, optical and radiocatalytic studies. Structural and nanoscale analyses show evidence of internal doping by Cu 2+ in the TiO 2 lattice that leads to the reduction of the optical band gap down to 1.5 eV. The effect of gamma radiation on the radiocatalytic activity of these catalysts was studied by degradation of methylene blue as a model pollutant. It was found that the addition of Cu-doped TiO 2 (anatase) powders improves significantly the pollutant degradation, as compared to photocatalysis. The doping and the annealing temperature's impact on the structural, optical and radiocatalytic efficiencies are highlighted and correlated.

中文翻译：

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放射性催化掺铜 TiO 2 纳米粒子在伽马辐射下降解有机物种

摘要 我们报告了一项旨在优化纯和掺铜 TiO 2 粉末的放射性催化性能的实验研究。这是通过进行交叉检查的结构、光学和放射性催化研究来实现的。结构和纳米级分析表明，在 TiO 2 晶格中存在 Cu 2+ 内部掺杂的证据，导致光学带隙降低至 1.5 eV。通过降解作为模型污染物的亚甲蓝来研究伽马辐射对这些催化剂的放射性催化活性的影响。结果表明，与光催化相比，Cu 掺杂的 TiO 2 （锐钛矿）粉末的添加显着改善了污染物的降解。掺杂和退火温度对结构、光学和放射性催化效率的影响被突出显示并相互关联。