Self-assembly synthesis of LaPO<sub class="a-plus-plus">4sub> hierarchical hollow spheres with enhanced photocatalytic CO<sub class="a-plus-plus">2sub>-reduction performance

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• 作者：Bao Pan ; Yangen Zhou ; Wenyue Su ; Xuxu Wang
• 关键词：CO2 reduction ; photocatalysis ; LaPO4 ; hierarchical hollow spheres
• 刊名：Nano Research
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：10
• 期：2
• 页码：534-545
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nanotechnology; Materials Science, general; Atomic/Molecular Structure and Spectra; Condensed Matter Physics; Biotechnology; Biomedicine, general;
• 出版者：Tsinghua University Press
• ISSN：1998-0000
• 卷排序：10

文摘

Urchin-like LaPO<sub>4sub> hollow spheres were successfully synthesized by a facile solution route using citric acid (CA) as a structure-directing agent. The size of the three-dimensional (3D) hollow spheres was tuned by changing the concentration of CA. The formation mechanism of the 3D LaPO<sub>4sub> hollow spheres was revealed by studying the time-dependent morphology evolution process. Importantly, compared with monodispersed one-dimensional (1D) LaPO<sub>4sub> nanorods, the 3D LaPO<sub>4sub> hollow spheres self-assembled from nanorods showed a 6.8-fold enhancement in photocatalytic activity for CO<sub>2sub> reduction, which is attributed to the synergistic effect of their hierarchical hollow structure, higher light-harvesting capacity, and faster electron transfer. Our findings provide not only a simple, facile method for the synthesis of hierarchical hollow micro/nanoarchitectures but also an efficient route for enhancing the photocatalytic performance.