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Mehregan S, Hayati F, Mehregan M, Isari AA, Jonidi Jafari A, Giannakis S, Kakavandi B. Exploring the visible light-assisted conversion of CO 2 into methane and methanol, using direct Z-scheme TiO 2@g-C 3N 4 nanosheets: synthesis and photocatalytic performance. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:74951-74966. [PMID: 35648354 DOI: 10.1007/s11356-022-21048-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
The rapid growth of carbon dioxide (CO2) emissions raises concern about the possible consequences of atmospheric CO2 increase, such as global warming and greenhouse effect. Photocatalytic CO2 conversion has attracted researchers' interests to find a sustainable route for its elimination. In the present study, a direct Z-scheme TiO2/g-C3N4 composite (T-GCN) was fabricated via a facile hydrothermal route for the photocatalytic reduction of CO2 into methane (CH4) and methanol (CH3OH), under visible light irradiation without an electron mediator. The microstructure of the as-obtained TiO2/g-C3N4 nanocomposites was fully characterized for its physicochemical, structural, charge separation, electronic, and photo-excited carrier separation properties. The effect of CO2 and H2O partial pressure was studied to find the best operational conditions for obtaining maximum photocatalytic efficiency; the PCO2 and PH2O were 75.8 and 15.5 kPa, respectively, whereas, by increasing the light intensity from 20 to 80 mW/cm2, a remarkable improvement in the reduction rate takes place (from 11.04 to 32.49 μmol.gcat-1.h-1 methane production, respectively). Finally, under the most favorable light, PCO2 and PH2O conditions, high methanol and methane rates were obtained from the CO2 photocatalytic reduction through T-GCN (1.44 μmol.gcat.-1.h-1 and 32.49 μmol.gcat.-1.h-1, respectively) and an integrated proposition for the Z-scheme mechanism of photocatalytic reduction was proposed. This study offers a promising strategy to synthesize a Z-scheme T-GCN heterojunction with high photocatalytic performance for effective CO2 conversion.
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Affiliation(s)
- Shima Mehregan
- Department of Chemistry, City of Columbia, University of Missouri, Columbia, USA
| | - Farzan Hayati
- Abadan Faculty of Petroleum Engineering, Petroleum University of Technology (PUT), Abadan, Iran
| | - Mahya Mehregan
- Department of Chemistry, City of Columbia, University of Missouri, Columbia, USA
| | - Ali Akbar Isari
- Department of Basic and Applied Sciences for Engineering, SAPIENZA University of Rome, Rome, Italy
| | - Ahmad Jonidi Jafari
- Department of Environmental Health Engineering, School of Health, Iran University of Medical Sciences, Tehran, Iran
| | - Stefanos Giannakis
- Universidad Politécnica de Madrid, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Departamento de Ingeniería Civil: Hidráulica, Energía Y Medio Ambiente, Unidad Docente Ingeniería Sanitaria, c/ Profesor Aranguren, s/n, S28040, Madrid, Spain
| | - Babak Kakavandi
- Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran.
- Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran.
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Lai H, Zeng X, Song T, Yin S, Long B, Ali A, Deng GJ. Fast synthesis of porous iron doped CeO 2 with oxygen vacancy for effective CO 2 photoreduction. J Colloid Interface Sci 2021; 608:1792-1801. [PMID: 34742088 DOI: 10.1016/j.jcis.2021.10.064] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 01/10/2023]
Abstract
The activity of photocatalytic CO2 conversion to carbon-containing products is determined by the adsorption and activation of CO2 molecules on the surface of catalyst. Here, iron doped porous CeO2 with oxygen vacancy (PFeCe) was prepared by one-step combustion method. The amount of CO2 adsorbed via using the porous structure has been significantly increased in the case of a relatively small specific surface area and CO2 molecules are more easily captured and undergo a reduction reaction with photoinduced carriers. In addition, oxygen vacancies are formed in the iron doped CeO2 lattice as the active sites for CO2 reduction, which can form strong interactions with CO2 molecules, thereby effectively activating CO2 molecules. The reduction products of CO2 over PFeCe composite are CO and CH4, which is approximately 9.0 and 7.7 folds than that of CeO2. This work offers insights for the construction of efficient ceria-based photocatalysts to further achieve robust solar CO2 conversion.
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Affiliation(s)
- Haiwei Lai
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, PR China
| | - Xiangdong Zeng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, PR China
| | - Ting Song
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, PR China.
| | - Shiheng Yin
- Analytical and Testing Center, South China University of Technology, Guangzhou 510640, PR China
| | - Bei Long
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, PR China
| | - Atif Ali
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, PR China.
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Filip M, Petcu G, Anghel EM, Petrescu S, Trica B, Osiceanu P, Stanica N, Atkinson I, Munteanu C, Mureseanu M, Parvulescu V. FeTi- SBA-15 magnetic nanocomposites with photocatalytic properties. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Nematollahi R, Ghotbi C, Khorasheh F, Larimi A. Ni-Bi co-doped TiO2 as highly visible light response nano-photocatalyst for CO2 photo-reduction in a batch photo-reactor. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2020.101289] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Sreedhar I, Varun Y, Singh SA, Venugopal A, Reddy BM. Developmental trends in CO2 methanation using various catalysts. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01234f] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Co2 methanation-two edged sword to counter global warming and energy crisis.
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Affiliation(s)
- I. Sreedhar
- Department of Chemical Engineering
- BITS Pilani Hyderabad Campus
- Hyderabad-500078
- India
| | - Yaddanapudi Varun
- Department of Chemical Engineering
- BITS Pilani Hyderabad Campus
- Hyderabad-500078
- India
| | - Satyapaul A. Singh
- Department of Chemical Engineering
- BITS Pilani Hyderabad Campus
- Hyderabad-500078
- India
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