The nanoparticles of WO₃ doped with Fe ions have been employed for University, Kermanshah photocatalytic conversion of greenhouse gaseous of CO₂ and CH₄ under visible-light irradiation. The photocatalysts have been characterized by XRD, FESEM, EDX, Raman, UV-vis, and PL techniques. The XRD and Raman spectroscopies confirm the monoclinic structure of WO₃ nanoparticles and also the successful incorporation of Fe ions into WO₃ lattice. A red shift in Raman patterns of Fe-doped WO₃ samples indicate the partial substitution of W with Fe ions and the structural defects induced in WO₃ crystals upon doping treatment. The recorded PL signals reveal that the charge carrier recombination rate can be inhibited by doping WO₃ with Fe ions. The modified samples show high activity by photons with wavelength equal to/greater than ~500 nm, the visible-light in green region. The best photocatalytic reduction of CO₂ is provided to be 38.7% by WO₃ containing 4.18 at.% Fe under visible-light. Ethane, and formate and acetate derivatives are detected as the major products of CO₂ reduction.

中文翻译：

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可见光响应的掺铁WO3纳米结构可有效减少光催化二氧化碳的排放

掺杂有Fe离子的WO ₃纳米颗粒已被Kermanshah大学用于可见光辐射下的CO ₂和CH ₄温室气体的光催化转化。光催化剂已通过XRD，FESEM，EDX，Raman，UV-vis和PL技术进行了表征。XRD和拉曼光谱证实了WO ₃纳米颗粒的单斜晶结构，并且也成功地将Fe离子掺入了WO ₃晶格中。掺铁的WO ₃样品的拉曼图案中的红移表明W被Fe离子部分取代，以及WO _3中诱导的结构缺陷掺杂处理后的晶体。记录的PL信号表明，通过用Fe离子掺杂WO ₃可以抑制电荷载流子复合速率。修改后的样品对波长等于/大于〜500 nm的光子显示出高活性，绿色区域中的可见光。通过在可见光下包含4.18原子％的Fe的WO ₃，使CO ₂的最佳光催化还原为38.7％。乙烷，甲酸酯和乙酸酯衍生物被检测为还原CO ₂的主要产物。