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首页> 外文期刊>RSC Advances >Sol–gel synthesis of DyCrO3 and 10% Fe-doped DyCrO3 nanoparticles with enhanced photocatalytic hydrogen production abilities
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Sol–gel synthesis of DyCrO3 and 10% Fe-doped DyCrO3 nanoparticles with enhanced photocatalytic hydrogen production abilities

机译：DyCrO3和10％Fe掺杂的DyCrO3纳米粒子的溶胶-凝胶合成，具有增强的光催化制氢能力

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DyCrO _(3) and 10% Fe-doped DyCrO _(3) nanoparticles have been synthesized using a sol–gel method to investigate their performance in photocatalytic hydrogen production from water. The synthesized nanoparticles have been characterized by performing X-ray diffraction, energy dispersive X-ray spectroscopy and UV-visible spectrophotometric measurements. In addition, field emission scanning electron microscopy has been performed to observe their size and shape. The Fe-doped DyCrO _(3) nanoparticles show a significantly smaller band gap of 2.45 eV compared to the band gap of 2.82 eV shown by the DyCrO _(3) nanoparticles. The Fe-doped DyCrO _(3) nanoparticles show better photocatalytic activity in the degradation of rhodamine B (RhB) compared to the photocatalytic activity shown by both the DyCrO _(3) and Degussa P25 titania nanoparticles. The recycling and reuse of Fe-doped DyCrO _(3) four times for the photo-degradation of RhB shows that Fe-doped DyCrO _(3) is a stable and reusable photocatalyst. To evaluate the extent of the photocatalytic hydrogen production ability of the synthesized nanoparticles, a theoretical model has been developed to determine their “absorptance”, a measure of the ability to absorb photons. Finally, 10% Fe-doped DyCrO _(3) proves itself to be an efficient photocatalyst as it demonstrated three times greater hydrogen production than Degussa P25.
机译：用溶胶-凝胶法合成了DyCrO _（3）和10％掺杂Fe的DyCrO _（3）纳米颗粒，以研究其在水中光催化制氢中的性能。通过执行X射线衍射，能量色散X射线光谱法和UV-可见分光光度法测量来表征合成的纳米颗粒。另外，已经进行了场发射扫描电子显微镜观察其尺寸和形状。与DyCrO _（3）纳米颗粒显示的2.82 eV的带隙相比，掺Fe的DyCrO_（3）纳米颗粒显示出明显更小的带隙2.45 eV。与DyCrO_（3）和Degussa P25二氧化钛纳米颗粒均显示出的光催化活性相比，掺Fe的DyCrO_（3）纳米颗粒在罗丹明B（RhB）的降解中显示出更好的光催化活性。掺铁的DyCrO_（3）进行四次循环再利用以进行RhB的光降解，表明掺铁的DyCrO_（3）是稳定且可重复使用的光催化剂。为了评估合成纳米颗粒的光催化产氢能力的程度，已经开发了一种理论模型来确定其“吸收率”，这是吸收光子能力的一种量度。最后，掺铁量为10％的DyCrO_（3）证明自己是一种有效的光催化剂，因为它显示出的氢产量是Degussa P25的三倍。

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