Abstract
Practical implementation of CO2 photoreduction technologies requires low-cost, highly efficient, and robust photocatalysts. High surface area photocatalysts are notable in that they offer abundant active sites and enhanced light harvesting. Here we summarize the progress in CO2 photoreduction with respect to synthesis and application of hierarchical nanostructured photocatalysts.
Highlights
The deleterious environmental impacts of fossil fuel [1] combustion are well recognized [2,3,4,5,6,7,8,9,10,11,12], making clear the critical need to develop renewable energy technologies
This study significantly provides some new ideas for fabrication of highly efficient metal organic framework-based photocatalysts for CO2 reduction
The study of wavelength‐dependent yield with appropriate long‐pass cutoff filters clearly revealed that CO2 photoreduction is encouraged by photoexcitation of Au(25)@CdS hierarchical multi-cavity hollow particles (HMCHPs) and maximum evolution with respect to 400 nm cutoff filter
Summary
The deleterious environmental impacts of fossil fuel [1] combustion are well recognized [2,3,4,5,6,7,8,9,10,11,12], making clear the critical need to develop renewable energy technologies. While a number of semiconductor photocatalysts have been extensively studied for CO2 photoreduction, such as, for example, ZnO [49,50,51], TiO2 [52,53,54,55,56,57,58], CdS [59,60,61], Fe2 O3 [62,63,64], g-C3 N4 [65,66,67,68,69], Cu2 O [70,71,72], and Bi2 WO6 [73,74,75], their performance is not yet sufficient for practical implementation due to constraints such as band gap energy that is too large, high recombination rate, and cost. In this review we examine progress in the synthesis and application of different hierarchical CO2 photoreduction photocatalysts, elucidating pathways by which higher performance might be achieved
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