A noble metal-free reduced graphene oxide–CdS nanorod composite for the enhanced visible-light photocatalytic reduction of CO2 to solar fuel

Wang, Yuanyuan; Jin, Jian; Jaroniec, Mietek

doi:10.1039/c3ta14493c

Cited by 502 publications

(290 citation statements)

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“…The enhanced activity is attributed to the efficient charge separation and transfer and the protection function of rGO [248]. Similarly, the CH 4 -production rate of a rGO-CdS nanorod composite photocatalyst was increased 10-fold compared with that of the pure CdS nanorods, which was even better than that of an optimized Pt-CdS nanorod photocatalyst under the same reaction conditions [108]. The rGO sheets in the composites not only promote the surface trapping and efficient separation of photo-generated charge carriers as an electron acceptor and transporter (as presented in Fig.…”

Section: Semiconductor/nano-carbon Heterojunctionsmentioning

confidence: 91%

“…Therefore, many efforts have been made to search for the visible-light-driven photocatalysts. One typical strategy is to exploit new single-phase visible-light-driven photocatalysts (e.g., CdS [60,63,108], C 3 N 4 [69,109,110], WO 3 [111,112], CaFe 2 O 4 [113,114], LaCoO 3 [115], BiVO 4 [116,117], Bi 2 WO 4 [118,119], Fe 2 V 4 O 13 [120] and InTaO 4 [121][122][123][124]), which have proven to be active for photocatalytic reduction of CO 2 in visible region. The other typical strategy is to make the wide band gap semiconductors active in visible region through a suitable modification.…”

Section: Strategies For Design and Fabrication Of Photocatalysts For mentioning

confidence: 99%

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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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Section: Semiconductor/nano-carbon Heterojunctionsmentioning

confidence: 91%

Section: Strategies For Design and Fabrication Of Photocatalysts For mentioning

confidence: 99%

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

et al. 2014

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“…It is noteworthy that the photocatalytic performance shown in this study under visible light is significantly higher or comparable in comparison with the previously reported photocatalytic systems under visible light, even under UV-vis light (Table S2). 21,27,43,[62][63][64][65][66][67][68][69][70] However, due to the different experimental conditions (such as light intensity, illumination area, photocatalysts dosage) in these photocatalytic systems, the direct comparison is not appropriate. Therefore, we also compared our materials with some typical semiconductors or composites (including N-doped TiO 2 , Au/TiO 2 , C 3 N 4 , WO 3 , P25) measured in the same reactor system.…”

Section: Photocatalytic Reduction Of Co 2 Over Ordered Mesoporous Co-mentioning

confidence: 99%

In situ synthesis of ordered mesoporous Co-doped TiO₂ and its enhanced photocatalytic activity and selectivity for the reduction of CO₂

et al. 2015

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Ordered mesoporous cobalt-doped titanium dioxide was successfully synthesized by a multicomponent self-assembly process. The doped Co species change the construction of the conduction band and valence band of TiO 2 , leading to visible-light absorption for TiO 2 . The designed cobalt-doped titanium dioxide performs a higher visible light activity for the reduction of CO 2 among the common reported photocatalysts. In addition, the selectivity of the reduction products is improved by optimizing the energy-band configurations of cobalt-doped titanium dioxide through varying the molar ratio of Co/Ti. When the content of doped cobalt species increases to some extent, Co 3 O 4 /Co-doped TiO 2 nanocomposites with oxygen vacancies were obtained, which markedly improve the generated rate of CH 4 .

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“…Simultaneously, photogenerated holes migrated to the surface of the photocatalyst for water oxidation to O 2 . CdS is one of the most promising candidate semiconductors as photocatalysts active in the Vis range: Yu et al [58] prepared RGO-CdS nanorods composites in ethanolamine-water solution using a one-step MW-assisted HT method. The composites exhibited a high activity in the photocatalytic reduction of CO2 to CH4, even without noble metal catalyst (i.e., Pt, which is usually adopted as cocatalyst).…”

Section: Mw-assisted Synthesis Of Photocatalysts For Co2 Reductionmentioning

confidence: 99%

Microwave, Ultrasound, and Mechanochemistry: Unconventional Tools that Are Used to Obtain “Smart” Catalysts for CO2 Hydrogenation

Manzoli

Bonelli

2018

Catalysts

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Abstract:The most recent progress obtained through the precise use of enabling technologies, namely microwave, ultrasound, and mechanochemistry, described in the literature for obtaining improved performance catalysts (and photocatalysts) for CO 2 hydrogenation, are reviewed. In particular, the main advantages (and drawbacks) found in using the proposed methodologies will be discussed and compared by focusing on catalyst design and optimization of clean and efficient (green) synthetic processes. The role of microwaves as a possible activation tool used to improve the reaction yield will also be considered.

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A noble metal-free reduced graphene oxide–CdS nanorod composite for the enhanced visible-light photocatalytic reduction of CO2 to solar fuel

Cited by 502 publications

References 71 publications

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

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

In situ synthesis of ordered mesoporous Co-doped TiO₂ and its enhanced photocatalytic activity and selectivity for the reduction of CO₂

Microwave, Ultrasound, and Mechanochemistry: Unconventional Tools that Are Used to Obtain “Smart” Catalysts for CO2 Hydrogenation

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A noble metal-free reduced graphene oxide–CdS nanorod composite for the enhanced visible-light photocatalytic reduction of CO2 to solar fuel

Cited by 502 publications

References 71 publications

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

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

In situ synthesis of ordered mesoporous Co-doped TiO2 and its enhanced photocatalytic activity and selectivity for the reduction of CO2

Microwave, Ultrasound, and Mechanochemistry: Unconventional Tools that Are Used to Obtain “Smart” Catalysts for CO2 Hydrogenation

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In situ synthesis of ordered mesoporous Co-doped TiO₂ and its enhanced photocatalytic activity and selectivity for the reduction of CO₂