Photocatalytic carbon dioxide reduction by photocatalyst innovation

Tjandra, Angie Davina; Huang, Jun

doi:10.1016/j.cclet.2018.03.017

Cited by 42 publications

(10 citation statements)

References 52 publications

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“…In the past 5 years, numerous research articles have been published focusing on further improving the activity, selectivity, and durability for PS/PC CO 2 reduction. There are also a lot of reviews and perspectives, such as a summary of photocatalyst development, ,,,− ,,,,− design strategies for reactors, ,, and the possibilities and challenges of solar fuel production. ,,,,,,− Here, we highlighted three studies on PS and PC CO 2 conversion with outstanding performance in some regard (see bold values in Table ).…”

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confidence: 99%

Recent Advances in Solar-Driven Carbon Dioxide Conversion: Expectations versus Reality

2020

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Solar-driven carbon dioxide (CO 2 ) conversion to fuels and high-value chemicals can contribute to the better utilization of renewable energy sources. Photosynthetic (PS), photocatalytic (PC), photoelectrochemical (PEC), and photovoltaic plus electrochemical (PV+EC) approaches are intensively studied strategies. We aimed to compare the performance of these approaches using unified metrics and to highlight representative studies with outstanding performance in a given aspect. Most importantly, a statistical analysis was carried out to compare the differences in activity, selectivity, and durability of the various approaches, and the underlying causes are discussed in detail. Several interesting trends were found: (i) Only the minority of the studies present comprehensive metrics. (ii) The CO 2 reduction products and their relative amount vary across the different approaches. (iii) Only the PV+EC approach is likely to lead to industrial technologies in the midterm future. Last, a brief perspective on new directions is given to stimulate discussion and future research activity.

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confidence: 99%

Recent Advances in Solar-Driven Carbon Dioxide Conversion: Expectations versus Reality

2020

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“…Several articles reported the effective CO 2 conversion over the CQDs based photocatalysts. [140,141] Since, pollutant degradation is also a serious issue. Therefore, a number of reports are also available on CQDs based photocatalysts for pollutant degradation.…”

Section: Carbon Quantum Dots (Cqds) Compositesmentioning

confidence: 99%

Recent Progress in the Synthesis and Applications of Composite Photocatalysts: A Critical Review

2021

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concentration for March 2021 was 417.14 parts per million (ppm), which is about 50% higher than the average for pre-industrial levels (i.e., 278 ppm). In order to control global warming, the CO 2 emission must fall by 25% to keep the temperature below 2 °C threshold relative to the pre-industrial climate. [3,4] Among the existing numerous renewable and sustainable energy resources such as wind, solar, hydropower, geo-thermal and ocean-energy, the consumption of unlimited solar energy become a vital alternative energy source, and has been extensively explored during the past few decades. [5] For instant, solar energy could be employed practically in photocatalysis for water splitting to generate hydrogen, carbon dioxide conversion to value added products, and pollutant oxidation. [6][7][8] Photocatalysis has advantage over conventional biological, incineration, electrocatalytic, adsorption, and air stripping treatment techniques because these methods always exhibit shortfalls such as instability, catalyst poisoning, low production yield, poor mechanical strength, time consuming, and electrode corrosion. [9,10] Generally, the photocatalytic process involves several essential steps such as the light absorption by photocatalyst to generate charge carriers, charge carrier's separation and migration to the photocatalyst surface, and the surface redox reactions to transform solar energy into chemical energy. [11,12] If these essential steps are satisfied by a proficient photocatalyst, then of course, high photocatalytic efficiency could be expected. Generally, the fundamental features of a photocatalyst include appropriate band gaps with their corresponding valence and conduction band potentials, surface active sites, surface area, and optical absorption behavior that govern the efficiency and effectiveness of photocatalytic processes. [13,14] Since the photocatalytic reactions are typically performed in water and air environments, therefore, the photocatalyst stability could be crucial under these circumstances. [15] Fujishima and Honda performed water splitting reaction for the first time in 1972, while utilizing TiO 2 photoanode with the aid of Pt as a counter electrode. [16] Afterward, TiO 2 photocatalyst received marvelous attention in photocatalysis owing to its promising features such as its non-toxic nature, water insolubility, nature abundant, hydrophilicity, high stability, and appropriate valence and conduction band potentials for redox reactions. [17] Yet, the Photocatalysis is an advanced technique that transforms solar energy into sustainable fuels and oxidizes pollutants via the aid of semiconductor photo catalysts. The main scientific and technological challenges for effective photocatalysis are the stability, robustness, and efficiency of semiconductor photocatalysts. For practical applications, researchers are trying to develop highly efficient and stable photocatalysts. Since the literature is highly scattered, it is urgent to write a critical review that summarizes the stateof theart progress in the ...

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“…Carbon dioxide (CO 2 ) is regarded as one of the greenhouse gases that leads to global warming. Therefore, the capture and conversion of CO 2 are crucial to solve the greenhouse effect. − As a potential resource, converting CO 2 into hydrocarbons especially driven by solar light is more meaningful and beneficial for the Earth’s carbon cycle compared with carbon capture and storage. − In the process of photocatalytic reaction, the adsorption of reactants has a critical implication for photocatalytic performance. The adsorption ability not only determines whether the reaction can take place but also has an effect on the activation of reactants.…”

Section: Introductionmentioning

confidence: 99%

B–O Bonds in Ultrathin Boron Nitride Nanosheets to Promote Photocatalytic Carbon Dioxide Conversion

Cao

Zhang

Zhou

et al. 2020

ACS Appl. Mater. Interfaces

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Limited by the chemical inertness of CO 2 and the high dissociation energy of the CO bond, photocatalytic CO 2 conversion is highly challenging. Herein, we prepare ultrathin oxygen-modified h-BN (O/BN) nanosheets containing B−O bonds. On the O/BN surface, CO 2 can be chemically captured and is bonded with the B−O bond, leading to the formation of an O−B−O bond. This new chemical bond acting as an electron-delivery channel strengthens the interaction between CO 2 and the surface. Thus, the reactants can continuously obtain electrons from the surface through this channel. Therefore, the majority of gaseous CO 2 directly converts into carbon active species that are detected by in situ DRIFTS over O/BN. Moreover, the activated energies of CO 2 conversion are significantly reduced with the introduction of the B−O bond evidenced by DFT calculations. As a result, O/BN nanosheets present an enhanced photocatalytic CO 2 conversion performance with the H 2 and CO generation rates of 3.3 and 12.5 μmol g −1 h −1 , respectively. This work could help in realizing the effects of nonmetal chemical bonds in the CO 2 photoreduction reaction for designing efficient photocatalysts.

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Photocatalytic carbon dioxide reduction by photocatalyst innovation

Cited by 42 publications

References 52 publications

Recent Advances in Solar-Driven Carbon Dioxide Conversion: Expectations versus Reality

Recent Advances in Solar-Driven Carbon Dioxide Conversion: Expectations versus Reality

Recent Progress in the Synthesis and Applications of Composite Photocatalysts: A Critical Review

B–O Bonds in Ultrathin Boron Nitride Nanosheets to Promote Photocatalytic Carbon Dioxide Conversion

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