کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1275732 | 1497537 | 2013 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A facile one-step synthesis of single crystalline hierarchical WO3 with enhanced activity for photoelectrochemical solar water oxidation A facile one-step synthesis of single crystalline hierarchical WO3 with enhanced activity for photoelectrochemical solar water oxidation](/preview/png/1275732.png)
Hierarchical architectures consisting of one-dimensional (1D) nanostructures are of great interest for potential use in energy and environmental applications in recent years. In this work, hierarchical tungsten oxide (WO3) has been synthesized via a straightforward, template-free, hydrothermal route from ammonium metatungstate hydrate and implemented in photoanode fabrication for solar water oxidation in photoelectrochemical cells and photocatalytic oxidation of organic pollutant. The flower-like WO3 micro-patterns are constructed by self-organized nanoscale length 1D building blocks, which are single-crystalline in nature, grown along (001) direction and confirm an orthorhombic crystal phase. Time-dependent experiments have been conducted to demonstrate their morphology evolution. The hierarchical architecture based photoanodes produce higher photocurrent (2-fold high) than the nanoparticles based photoanodes from solar water oxidation. The photon to current conversion efficiency achieved with the hierarchical architectures is 45% at 400 nm. The enhanced activity can be attributed to improved charge-separation by superior charge transportation through single-crystalline 1D building blocks.
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► Easy synthesis of hierarchical WO3 consisting of 1D nanobar building blocks.
► Preparation of efficient WO3 photoanode for solar water oxidation in PEC cell.
► Hierarchical WO3 anode shows better photoactivity than nanoparticle based anode.
► Improved activity can be explained by better charge transport and charge separation.
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 8, 19 March 2013, Pages 3177–3188