Controlled fabrication of Pr（OH）3 nanowires for enhanced photocatalytic activities
来源期刊：Journal of Rare Earths2019年第1期
论文作者：Nan Chen Adnan Younis Dewei Chu Sean Li
文章页码：60 - 67
摘 要：In this report, praseodymium hydroxide Pr（OH）3 nanowires with different aspect ratios （length to diameter ratios） were synthesized by a facile hydrothermal approach. The variations in alkali concentration during synthesis are found to form different aspect ratios of nanowires. The X-ray diffraction and Raman spectroscopy analysis demonstrate the absence of any impurity phases in as-prepared materials.Subsequently, photocatalytic activities of as-prepared nano wires were evaluated by the degradation of methyl orange （MO）. Our findings reveal that the nanowires with larger aspect ratios have higher photocatalytic efficiency than the smaller aspect ratio samples. X-ray photospectroscopy investigations reveal that the samples with higher aspect ratio are found to exhibit more oxygen vacancies as compared to lower aspect ratio samples. The enhanced photocatalytic activities can be attributed to the presence of higher percentage of active crystal facet （100）, higher concentration of defects densities and narrower band gap. Thus, Pr（OH）3 nanowires can be considered as a potential candidate for the application of wastewater treatment and related technologies.
Nan Chen，Adnan Younis，Dewei Chu，Sean Li
School of Materials Science and Engineering,University of New South Wales
摘 要：In this report, praseodymium hydroxide Pr（OH）3 nanowires with different aspect ratios （length to diameter ratios） were synthesized by a facile hydrothermal approach. The variations in alkali concentration during synthesis are found to form different aspect ratios of nanowires. The X-ray diffraction and Raman spectroscopy analysis demonstrate the absence of any impurity phases in as-prepared materials.Subsequently, photocatalytic activities of as-prepared nano wires were evaluated by the degradation of methyl orange （MO）. Our findings reveal that the nanowires with larger aspect ratios have higher photocatalytic efficiency than the smaller aspect ratio samples. X-ray photospectroscopy investigations reveal that the samples with higher aspect ratio are found to exhibit more oxygen vacancies as compared to lower aspect ratio samples. The enhanced photocatalytic activities can be attributed to the presence of higher percentage of active crystal facet （100）, higher concentration of defects densities and narrower band gap. Thus, Pr（OH）3 nanowires can be considered as a potential candidate for the application of wastewater treatment and related technologies.
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