One-pot synthesis of rutile TiO2 nanoparticle modified anatase TiO2 nanorods toward enhanced photocatalytic reduction of CO2 into hydrocarbon fuels

Wang, Pingquan; Bai, Yang; Liu, Jianyi; Zhou, Fan; Hu, Yaqin

doi:10.1016/j.catcom.2012.10.010

Cited by 68 publications

(29 citation statements)

References 19 publications

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“…The rutile phase NPs served as an electron sink in place of more commonly used and more expensive Pt NPs. Wang et al (2012a) showed that this TiO 2 -RMA structure showed greater conversion rates than just anatase phase nanorods. While the transition from semiconductor powders to semiconductor NPs has effectively increased the surface area of TiO 2 catalytic systems, additional modifications to TiO 2 are required to enhance activity that is a result of its wide band-gap, which restricts excitation to the UV range, which constitutes only 3-5% of the solar spectrum.…”

Section: Tio 2 -Related Photocatalystsmentioning

confidence: 94%

“…By changing to a patterned film structure or nanowire/rod configuration, the electron transport can be oriented to be more direct in one path so that electron recombination between two individual TiO 2 structures is minimized. For example, the synthesis and characterization of anatase phase nanorods modified with rutile phase NPs (TiO 2 -RMA) for the photoreduction of CO 2 were reported (Wang et al, 2012a). The rutile phase NPs served as an electron sink in place of more commonly used and more expensive Pt NPs.…”

Section: Tio 2 -Related Photocatalystsmentioning

confidence: 99%

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Comparison of CO2 Photoreduction Systems: A Review

Wang

Soulis

Yang

et al. 2014

Aerosol Air Qual. Res.

142

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Carbon dioxide (CO 2 ) emissions are a major contributor to the climate change equation, and thus strategies need to be developed in order to reduce increases in CO 2 levels in the atmosphere. One of the most promising approaches is to convert CO 2 into useful products in engineered processes. The photocatalytic reduction of CO 2 into hydrocarbon fuels is a promising way to recycle CO 2 as a fuel feedstock by taking advantage of the readily available solar energy. This article reviews the basics of CO 2 photoreduction mechanisms, limiting steps, possible strategies to enhance photoreduction efficiency, and the state-of-the-art photocatalytic systems for CO 2 reduction. In particular, a comparison between different catalytic systems, including biological (plants and algae), inorganics (semiconductors), organics (molecular complexes), and hybrid (enzyme/semiconductors) systems is provided.

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Section: Tio 2 -Related Photocatalystsmentioning

confidence: 94%

Section: Tio 2 -Related Photocatalystsmentioning

confidence: 99%

Comparison of CO2 Photoreduction Systems: A Review

Wang

Soulis

Yang

et al. 2014

Aerosol Air Qual. Res.

142

View full text Add to dashboard Cite

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“…TiO 2 nanotubes [63,97,[186][187][188][189][190][191], nanofibers [192] and nanorods [168,169,193] exhibited a much better photocatalytic activity for CO 2 reduction than P25 or TiO 2 NPs. For instance, Fu et al [192] demonstrated that the TiO 2 nanofibers with a 2-h solvothermal treatment exhibited the highest activity for photocatalytic reduction of CO 2 to CH 4 , which was about 6 and 25 times higher than those of TiO 2 nanofibers without solvothermal treatment and P25, respectively, due to the enhanced CO 2 adsorption capacity and the improved charge separation.…”

Section: Nanostructured 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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“…TiO 2 anatase, rutile or anataserutile mixed phase (e.g., Degussa P25 with a composition of 75% anatase and 25% rutile) has been frequently studied in photocatalytic reduction of CO 2 , using either bare TiO 2 or with incorporation of metal, nonmetal or metal oxide species (Anpo et al, 1995;Tseng et al, 2004;Koci et al, 2009;Zhang et al, 2011;Wang et al, 2012a;Wang et al, 2012b). By contrast, the brookite phase or anatase-brookite mixed phase is much less studied as a photocatalyst for CO 2 photoreduction, probably due to the previous difficulty in synthesizing high quality brookite nanocrystallites.…”

Section: Effect Of Crystal Phasementioning

confidence: 99%

“…Among the studies on the mixed-phase TiO 2 , anataserich anatase/rutile is more active than pure anatase or rutile for CO 2 photoreduction (Li et al, 2008b;Wang et al, 2012a). The enhanced activity of anatase/rutile mixture compared with single phase anatase or rutile was primarily attributed to the effective charge separation and transfer occurring between anatase and rutile.…”

Section: Effect Of Crystal Phasementioning

confidence: 99%

Understanding the Reaction Mechanism of Photocatalytic Reduction of CO2 with H2O on TiO2-Based Photocatalysts: A Review

Liu

2014

Aerosol Air Qual. Res.

308

217

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Recently, there has been an increasing interest in the research of photocatalytic reduction of CO 2 with H 2 O, an innovative way to simultaneously reduce the level of CO 2 emissions and produce renewable and sustainable fuels. Titanium dioxide (TiO 2 ) and modified TiO 2 composites are the most widely used photocatalysts in this application; however, the reaction mechanism of CO 2 photoreduction on TiO 2 photocatalysts is still not very clear, and the reaction intermediates and product selectivity are not well understood. This review aims to summarize the recent advances in the exploration of reaction mechanism of CO 2 photoreduction with H 2 O in correlation with the TiO 2 photocatalyst characteristics. Discussions are provided in the following sections: (1) CO 2 adsorption, activation and dissociation on TiO 2 photocatalyst; (2) mechanism and approaches to enhance charge transfer from photocatalyst to reactants (i.e., CO 2 and H 2 O); and (3) surface intermediates, reaction pathways, and product selectivity. In each section, the effects of material properties are discussed, including TiO 2 crystal phases (e.g., anatase, rutile, brookite, or their mixtures), surface defects (e.g., oxygen vacancy and Ti 3+) and material modifications (e.g., incorporation of noble metal, metal oxide, and/or nonmetal species to TiO 2 ). Finally, perspectives on future research directions and open issues to be addressed in CO 2 photoreduction are outlined in this review paper.

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One-pot synthesis of rutile TiO2 nanoparticle modified anatase TiO2 nanorods toward enhanced photocatalytic reduction of CO2 into hydrocarbon fuels

Cited by 68 publications

References 19 publications

Comparison of CO2 Photoreduction Systems: A Review

Comparison of CO2 Photoreduction Systems: A Review

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

Understanding the Reaction Mechanism of Photocatalytic Reduction of CO2 with H2O on TiO2-Based Photocatalysts: A Review

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