Journal
NANO RESEARCH
Volume 10, Issue 2, Pages 534-545Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-016-1311-7
Keywords
CO2 reduction; photocatalysis; LaPO4; hierarchical hollow spheres
Categories
Funding
- National Natural Science Foundation of China [U1305242, 21373050]
- National Basic Research Program of China [2013CB632405, 2014CB239303, 2014CB260410, 2014BAC13B03]
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Urchin-like LaPO4 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 LaPO4 hollow spheres was revealed by studying the time-dependent morphology evolution process. Importantly, compared with monodispersed one-dimensional (1D) LaPO4 nanorods, the 3D LaPO4 hollow spheres self-assembled from nanorods showed a 6.8-fold enhancement in photocatalytic activity for CO2 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.
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