Carbon Nanoparticles as Visible-Light Photocatalysts for Efficient CO<sub>2</sub> Conversion and Beyond

Cao, Li; Sahu, Sushant; Anilkumar, Parambath; Bunker, Christopher E.; Xu, Juan; Fernando, K. A. Shiral; Wang, Ping; Guliants, Elena A.; Tackett, Kenneth N.; Sun, Ya‐Ping

doi:10.1021/ja200804h

Cited by 548 publications

(369 citation statements)

References 20 publications

(39 reference statements)

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“…Praus et al (2011) reported the synthesis of CdS NPs deposited on montmorillonite (MMT) and found that the photocatalytic activity of the resulting CdS-MMT nanocomposite was 4-8 times greater than P25. Cao et al (2011) reported the use of carbon NPs covalenty functionalized with gold and platinum to concentrate the photogenerated electrons for the ultimate reduction of CO 2 . This functionalization gives carbon NPs strong absorption in the visible range and possible near-IR range as well.…”

Section: Other Semiconductorsmentioning

confidence: 99%

Comparison of CO2 Photoreduction Systems: A Review

Wang

Soulis

Yang

et al. 2014

Aerosol Air Qual. Res.

135

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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: Other Semiconductorsmentioning

confidence: 99%

Comparison of CO2 Photoreduction Systems: A Review

Wang

Soulis

Yang

et al. 2014

Aerosol Air Qual. Res.

135

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“…Specifically, gold-doped aC-dots and gC-dots are effective catalysts for the conversion of carbon dioxide into formic acid 46 and the photocatalytic splitting of water to hydrogen. 86 Highly PL C-dots anchored to TiO 2 extend the range of visible spectrum harnessed by the nanoparticles. Upon illumination of gC-dot/TiO 2 or gC-dot/SiO 2 hybrid catalysts, the upconverted radiation excites TiO 2 or SiO 2 to generate electron/hole pairs.…”

Section: Catalytic Activitymentioning

confidence: 99%

From highly graphitic to amorphous carbon dots: A critical review

Kelarakis

2014

MRS Energy & Sustainability

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Graphitic and amorphous C-dots share common characteristics in their photoluminescence behavior. However, the graphitic dots have a lead as electrocatalyst for fuel cells, sensitizers, and electron acceptors for solar cells.The emergence of carbogenic nanoparticles (C-dots) as a new class of photoluminescent (PL) nanoemitters is directly related to their economical preparation, nontoxic nature, versatility, and tunability. C-dots are typically prepared by pyrolytic or oxidative treatment of suitable precursors.While the surface functionalities critically affect the dispersibility and the emission intensity of C-dots in a given environment, it is the nature of the carbogenic core that actually imparts certain intrinsic properties. Depending on the synthetic approach and the starting materials, the structure of the carbogenic core can vary from highly graphitic all the way to completely amorphous. This critical review focuses on correlating the functions of C-dots with the graphitic or amorphous nature of their carbogenic cores. The systematic classifi cation on that basis can provide insights on the origins of their intriguing photophysical behavior and can contribute in realizing their full potential in challenging applications.Keywords : luminescence ; nanostructure ; carbonization REVIEW DISCUSSION POINT ▪ C-dots set an example that low-cost, non-toxic materials can effectively supplant highly engineered, yet toxic compounds in challenging applications.

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“…Carbon nanomaterials including carbon nanotubes, nanoparticles, nanofibers, graphene oxide and carbon dots (C-dots), have attracted great attention due to their wide applications in solar cells [1], bioimaging [2], photocatalysts [3], nanoelectronic devices [4], photodynamic therapy [5] and gene delivery [6]. Among them, carbon dots are a new class of functional nanomaterials exhibiting their inherently unique photoluminescent properties, such as wavelengthtuneable emission, excellent solubility, good biocompatibility and chemical inertion [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%