Photoreduction of Carbondioxide on Surface Functionalized Nanoporous Catalysts

Hwang, Jung Yeon; Chang, Jong‐San; Park, Sang-Eon; Ikeue, Keita; Anpo, Masakazu

doi:10.1007/s11244-005-3839-8

Cited by 91 publications

(64 citation statements)

References 34 publications

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“…Since this time, research has largely focused on the exploration and development of new semiconductor photocatalysts (23), modifications of the semiconductor catalyst in the form of added cocatalysts, e.g., Ni, Cu, Ag, and Pt (23)(24)(25), new methods to nanostructure the catalyst (26), and the coupling of molecular dyes and cocatalysts with the heterogeneous catalyst (27,28). Whereas these advances have led to improvements in catalytic efficiency and quantum yields, little progress has been realized in extending the selectivity of the reaction to favor the more desirable, higher carbon number liquid hydrocarbons (29).…”

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confidence: 99%

RETRACTED: Solar photothermochemical alkane reverse combustion

Chanmanee

Islam

Dennis

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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A one-step, gas-phase photothermocatalytic process for the synthesis of hydrocarbons, including liquid alkanes, aromatics, and oxygenates, with carbon numbers (Cn) up to C13, from CO2 and water is demonstrated in a flow photoreactor operating at elevated temperatures (180–200 °C) and pressures (1–6 bar) using a 5% cobalt on TiO2 catalyst and under UV irradiation. A parametric study of temperature, pressure, and partial pressure ratio revealed that temperatures in excess of 160 °C are needed to obtain the higher Cn products in quantity and that the product distribution shifts toward higher Cn products with increasing pressure. In the best run so far, over 13% by mass of the products were C5+ hydrocarbons and some of these, i.e., octane, are drop-in replacements for existing liquid hydrocarbons fuels. Dioxygen was detected in yields ranging between 64% and 150%. In principle, this tandem photochemical–thermochemical process, fitted with a photocatalyst better matched to the solar spectrum, could provide a cheap and direct method to produce liquid hydrocarbons from CO2 and water via a solar process which uses concentrated sunlight for both photochemical excitation to generate high-energy intermediates and heat to drive important thermochemical carbon-chain-forming reactions.

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confidence: 99%

RETRACTED: Solar photothermochemical alkane reverse combustion

Chanmanee

Islam

Dennis

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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“…Very recently, it was reported that the selectivity for photoreduction of CO 2 can be tailored by controlling the band structure of a g-C 3 N 4 photocatalyst [287]. Thus, it is clear that the band structure, surface state and sites (e.g., the chemistry of CO 2 adsorption, oxygen vacancies, isolated Ti-species, acidbase properties and the hydrophobic-hydrophilic nature) played very crucial roles in the photoinduced activation of CO 2 [39,88,[288][289][290].…”

Section: Important Factors Affecting Co 2 Activationmentioning

confidence: 99%

“…Yet, the microporous structure of zeolites is not beneficial for the improvement of photocatalytic activity. Thus, a variety of mesoporous molecular sieves (MCM-41, MCM-48, KIT-6, FSM-16 and SBA-15) are also applied in photocatalytic CO 2 reduction [285,290,295,[304][305][306][307][308][309]. Ti-MCM-41 and Ti-MCM-48 mesoporous zeolite catalysts exhibited high photocatalytic reactivity for the reduction of CO 2 with H 2 O at 328 K to produce CH 4 and CH 3 OH in the gas phase.…”

Section: Developing Mesoporous Photocatalystsmentioning

confidence: 99%

Design and fabrication of semiconductor photocatalyst for photocatalytic reduction of CO2 to solar fuel

et al. 2014

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The shortage of fossil fuels and the disastrous pollution of the environment have led to an increasing interest in artificial photosynthesis. The photocatalytic conversion of CO 2 into solar fuel is believed to be one of the best methods to overcome both the energy crisis and environmental problems. It is of significant importance to efficiently manage the surface reactions and the photo-generated charge carriers to maximize the activity and selectivity of semiconductor photocatalysts for photoconversion of CO 2 and H 2 O to solar fuel. To date, a variety of strategies have been developed to boost their photocatalytic activity and selectivity for CO 2 photoreduction. Based on the analysis of limited factors in improving the photocatalytic efficiency and selectivity, this review attempts to summarize these strategies and their corresponding design principles, including increased visible-light excitation, promoted charge transfer and separation, enhanced adsorption and activation of CO 2 , accelerated CO 2 reduction kinetics and suppressed undesirable reaction. Furthermore, we not only provide a summary of the recent progress in the rational design and fabrication of highly active and selective photocatalysts for the photoreduction of CO 2 , but also offer some fundamental insights into designing highly efficient photocatalysts for water splitting or pollutant degradation. INTRODUCTIONThe shortage of the energy supply and the problem of disastrous environmental pollution have been recognized as two main challenges in the near future [1]. It is a better way to efficiently and inexpensively convert solar energy into chemical fuels by developing an artificial photosynthetic (APS) system because solar fuels are high density energy carriers with long-term storage capacity. The most important and challenging reactions in APS-the photocatalytic water splitting into H 2 and O 2 (water reduction and oxidation) [2][3][4] and photoreduction of CO 2 to solar fuel, such as CH 4 and CH 3 OH [5,6] have been extensively studied since the photocatalytic water splitting on TiO 2 electrodes was discovered by Honda and Fujishima in 1972 [7]. The photocatalytic reduction of CO 2 by means of solar energy has attracted growing attention in the recent years, which 1 State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China 2 College of Science, South China Agricultural University, Guangzhou 510642, China 3 Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia * Corresponding author (email: jiaguoyu@yahoo.com) is also believed to be one of the best methods to overcome both global warming and energy crisis [8]. However, it is also generally thought that photocatalytic CO 2 reduction is a more complex and difficult process than H 2 production due to preferential H 2 production and low selectivity for the carbon species produced [9,10]. The progress achieved in the photoreduction of CO 2 is still far behind that in wate...

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“…Inoue et al (1979) were the first to report the photocatalytic reduction of CO 2 in aqueous solutions to produce a mixture of formaldehyde, formic acid, methanol and methane using various wide-band-gap semiconductors. Since then, intensive efforts have been focused on the photochemical production of fuels by CO 2 reduction using a variety of photocatalysts (Halmann 1993;Hwang et al 2005;Indrakanti et al 2009;Olah et al 2009). …”

Section: D) Photochemical Production Of Synthetic Fuelsmentioning

confidence: 99%

Turning carbon dioxide into fuel

Jiang

Xiao

Кузнецов

et al. 2010

Phil. Trans. R. Soc. A.

407

289

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Our present dependence on fossil fuels means that, as our demand for energy inevitably increases, so do emissions of greenhouse gases, most notably carbon dioxide (CO 2 ). To avoid the obvious consequences on climate change, the concentration of such greenhouse gases in the atmosphere must be stabilized. But, as populations grow and economies develop, future demands now ensure that energy will be one of the defining issues of this century. This unique set of (coupled) challenges also means that science and engineering have a unique opportunity-and a burgeoning challenge-to apply their understanding to provide sustainable energy solutions. Integrated carbon capture and subsequent sequestration is generally advanced as the most promising option to tackle greenhouse gases in the short to medium term. Here, we provide a brief overview of an alternative mid-to long-term option, namely, the capture and conversion of CO 2 , to produce sustainable, synthetic hydrocarbon or carbonaceous fuels, most notably for transportation purposes.Basically, the approach centres on the concept of the large-scale re-use of CO 2 released by human activity to produce synthetic fuels, and how this challenging approach could assume an important role in tackling the issue of global CO 2 emissions. We highlight three possible strategies involving CO 2 conversion by physico-chemical approaches: sustainable (or renewable) synthetic methanol, syngas production derived from flue gases from coal-, gas-or oil-fired electric power stations, and photochemical production of synthetic fuels. The use of CO 2 to synthesize commodity chemicals is covered elsewhere (Arakawa et al. 2001 Chem. Rev. 101, 953-996); this review is focused on the possibilities for the conversion of CO 2 to fuels. Although these three prototypical areas differ in their ultimate applications, the underpinning thermodynamic considerations centre on the conversionand hence the utilization-of CO 2 . Here, we hope to illustrate that advances in the science and engineering of materials are critical for these new energy technologies, and specific examples are given for all three examples.With sufficient advances, and institutional and political support, such scientific and technological innovations could help to regulate/stabilize the CO 2 levels in the atmosphere and thereby extend the use of fossil-fuel-derived feedstocks.

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Photoreduction of Carbondioxide on Surface Functionalized Nanoporous Catalysts

Cited by 91 publications

References 34 publications

RETRACTED: Solar photothermochemical alkane reverse combustion

RETRACTED: Solar photothermochemical alkane reverse combustion

Design and fabrication of semiconductor photocatalyst for photocatalytic reduction of CO2 to solar fuel

Turning carbon dioxide into fuel

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