Enhancement of the Performance of Photocatalytic CO2 Reduction

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Photocatalysis".

Deadline for manuscript submissions: 28 February 2025 | Viewed by 2064

Special Issue Editors


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Guest Editor
Department of Mechanical Engineering, Mie University, Tsu 5148507, Mie, Japan
Interests: smart city utilizing renewable energy; electro-chemical energy processes; heat and mass transfer processes; renewable energy based electrolytic hydrogen production; fuel cell technologies; smart city orientation for wind and solar energy applications; photocatalytic CO2 reduction
Special Issues, Collections and Topics in MDPI journals
School of Electrical and Mechanical Engineering, The University of Adelaide, Adelaide 5005, Australia
Interests: solar thermal applications; refrigeration and air conditioning systems; ground-sourced air-conditioning systems and heat pumps; solar thermal power generation; solar thermal cooling; engineering thermodynamics
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Special Issue Information

Dear Colleagues,

Global warming is an issue of worldwide significance. Many countries have set goals to reduce the quantity of emissions produced by 2030 and 2050. Photocatalytic CO2 reduction is one technology that holds promise with regard to solving the problem of global warming. This involves carbon capture and usage (CCU), during which CO2 can be converted into fuel. However, the performance of photocatalytic CO2 reduction remains low, and thus CCU cannot yet be realized. Therefore, this Special Issue focuses on this new concept in order to enhance the performance of photocatalytic CO2 reduction. Because many researchers are attempting to develop new photocatalysts and a photocatalytic reactor to enhance the performance of photocatalytic CO2 reduction, this Special Issue is a good chance for them to exhibit their achievements and discuss the new concept. The Guest Editor looks forward to receiving many papers for this Special Issue.

Dr. Akira Nishimura
Dr. Eric Hu
Guest Editors

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Keywords

  • photocatalyst
  • CO2 reduction
  • catalyst development
  • reactor design
  • light absorption

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Published Papers (2 papers)

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Research

14 pages, 4229 KiB  
Article
Hierarchical Ag3VO4 Nanorods as an Excellent Visible Light Photocatalyst for CO2 Conversion to Solar Fuels
by Abdullah Bafaqeer, Aniz Chennampilly Ummer and Duraisami Dhamodharan
Catalysts 2024, 14(10), 672; https://doi.org/10.3390/catal14100672 - 28 Sep 2024
Viewed by 583
Abstract
The potential of photocatalytic CO2 conversion is significant for the production of fuels and chemicals, while simultaneously mitigating CO2 emissions and addressing environmental concerns. Despite the current drawbacks of single metal-based photocatalysts, such as lower performance, uncontrollable selectivity, and instability, this [...] Read more.
The potential of photocatalytic CO2 conversion is significant for the production of fuels and chemicals, while simultaneously mitigating CO2 emissions and addressing environmental concerns. Despite the current drawbacks of single metal-based photocatalysts, such as lower performance, uncontrollable selectivity, and instability, this study focuses on the synthesis of Ag3VO4 nanorods using the sol–gel method. The goal is to create a highly effective catalyst for visible light-responsive CO2 conversion. The successful synthesis of Ag3VO4 nanorods with a nanorod structure, functional under visible light, resulted in the highest yields of CH4 and dimethyl ether (DME) at 271 and 69 µmole/g-cat, respectively. The optimized Ag3VO4 nanorods demonstrated performance improvements, with CH4 and DME production 6.4 times and 4.5 times higher than when using V2O5 samples. This suggests that Ag3VO4 nanorods facilitate electron transfer to CO2, offer short pathways for electron transfer, and create empty spaces within the nanorods as electron reservoirs, enhancing the photoactivity. The prolonged stability of Ag3VO4 in the CO2 conversion system confirms that the nanorod structure provides controllable selectivity and stability. Therefore, the fabrication of nanorod structures holds promise in advancing high-performance photocatalysts in the field of photocatalytic CO2 conversion to solar fuels. Full article
(This article belongs to the Special Issue Enhancement of the Performance of Photocatalytic CO2 Reduction)
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16 pages, 5425 KiB  
Article
CO2 Reduction Performance with Double-Layered Cu/TiO2 and P4O10/TiO2 as Photocatalysts under Different Light Illumination Conditions
by Akira Nishimura, Hiroki Senoue, Homare Mae, Ryo Hanyu and Eric Hu
Catalysts 2024, 14(4), 270; https://doi.org/10.3390/catal14040270 - 17 Apr 2024
Viewed by 1007
Abstract
This paper presents an experimental study of using a double-layered Cu/TiO2 and P4O10/TiO2 as photocatalysts for CO2 reduction with an extended wavelength of range light from ultraviolet light (UV) to infrared light (IR). The lights studied [...] Read more.
This paper presents an experimental study of using a double-layered Cu/TiO2 and P4O10/TiO2 as photocatalysts for CO2 reduction with an extended wavelength of range light from ultraviolet light (UV) to infrared light (IR). The lights studied were UV + visible light (VIS) + IR, VIS + IR and IR only. This study also investigated the impact of the molar ratio of CO2:H2O on the CO2 reduction performance. This study revealed that the optimum molar ratio of CO2:H2O to produce CO was 1:1, irrespective of light illumination condition, which matched the theoretical molar ratio to produce CO according to the reaction scheme of CO2 reduction with H2O. Comparing the results of double-layered Cu/TiO2 and P4O10/TiO2 with those of double-layered TiO2 obtained under the UV + VIS + IR light illumination condition, the highest concentration of formed CO and the molar quantity of formed CO per unit weight of the photocatalyst increased by 281 ppmV and 0.8 μmol/g, in the case of the molar ratio of CO2:H2O = 1:1. With IR-only illumination, the highest concentration of formed CO and the molar quantity of CO formed per unit weight of the photocatalyst was 251 ppmV and 4.7 μmol/g, respectively. Full article
(This article belongs to the Special Issue Enhancement of the Performance of Photocatalytic CO2 Reduction)
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