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Keywords:

  • carbon dioxide;
  • nanowires;
  • oxygen vacancies;
  • photochemistry;
  • tungsten
Thumbnail image of graphical abstract

Open vacancies: A facile one-pot synthesis of oxygen-vacancy-rich ultrathin W18O49 nanowires up to several micrometers long is described. In addition to unique optical properties, such as NIR absorption and blue-light emission, the nanowires show an unexpected ability to photochemically reduce carbon dioxide to methane (see picture) as a result of its defect structure caused by large quantities of oxygen vacancies.