Triphenylamine based conjugated microporous polymers for selective photoreduction of CO<sub>2</sub> to CO under visible light

Dai, Chunhui; Zhong, Lixiang; Gong, Xuezhong; Zeng, Lei; Xue, Can; Li, Shuzhou; Liu, Bin

doi:10.1039/c9gc03131f

Cited by 74 publications

(52 citation statements)

References 40 publications

(44 reference statements)

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“…Dai et al . prepared two triphenylamine‐based CMPs (OXD‐TPA) [49] . By adjusting the electronic structure of the polymers, OXD‐TPA possesses a narrower optical band gap, higher interfacial charge transfer, and CO 2 adsorption efficiency than those of other contrast materials.…”

Section: Pops Used In Co2prrmentioning

confidence: 99%

Porous Organic Polymers for Photocatalytic Carbon Dioxide Reduction

2021

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Many porous organic polymers (POPs) possess excellent light absorption capacity and CO2 absorption performance owing to their conjugated skeletons and large specific surface area values. Some of these fascinating materials have inherent reaction sites for CO2 conversion and appropriate band structures to catalyze the CO2 reduction reaction. Therefore, these POPs have been used as heterogeneous catalysts in the photocatalytic CO2 reduction reaction. Among those POPs, four kinds of catalytic systems have been developed for realizing the CO2 photoreduction reaction: POPs loaded with noble metals, POPs loaded with non‐noble metals, POPs combined with inorganic semiconductors, and metal‐free POPs. Each of these catalytic systems has its own advantages and drawbacks. In general, the catalytic system of supported metals has higher catalytic efficiency but lower durability than metal‐free POPs. It should be noted that in the process of catalyst development, the co‐catalyst is gradually minimizing in POPs to achieve a more green CO2 photoreduction reaction. In this review, different types of POPs and the relationship between their structures and catalytic performance in the photocatalytic reduction of CO2 are summarized.

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Section: Pops Used In Co2prrmentioning

confidence: 99%

Porous Organic Polymers for Photocatalytic Carbon Dioxide Reduction

2021

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“…In polymer 42 , photogenerated electrons and holes were delocalized throughout the structure, resulting in increased spatial overlap between electrons and holes which led to increased exciton recombination and a lower photocatalytic activity. [ 178 ] Polymers 44 – 46 were a series of structures incorporating Eosin Y as a monomer within the conjugated network. The highest performance for CO production was achieved by network 44 and was 0.33 µmol h −1 with a selectivity of 92%.…”

Section: Photocatalysts For Carbon Dioxide Photoreductionmentioning

confidence: 99%

Photocatalysts Based on Organic Semiconductors with Tunable Energy Levels for Solar Fuel Applications

Koščo

Moruzzi

Willner

et al. 2020

Advanced Energy Materials

128

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development of sustainable energy sources. [1] Among these, solar energy has the greatest potential, with more solar energy irradiating the surface of the Earth in one hour than human society consumes in one year. [2] However, the intermittency of solar energy limits its utility. In order for solar energy to provide power on a scale commensurate with that currently generated from fossil fuels, it must be stored and supplied to users on demand. [3] On short timescales (seconds to days) this is possible to achieve using batteries, which can store electricity generated from solar photovoltaics. [4,5] However, the expensive materials required and their relatively high rates of self-discharge make batteries unsuitable for seasonal energy storage. [6,7] Storing solar energy in the chemical bonds of a fuel, which can be stored indefinitely at low cost, transported, and converted to electrical or heat energy on demand is therefore highly desirable. Solar fuels such as H 2 , CH 3 OH, and CH 4 can be generated from abundant and renewable feedstocks such as water and CO 2 using semiconductor photocatalysts. The vast majority of research to date has focused on photocatalysts fabricated from wide bandgap semiconductors such as TiO 2 , [8] SrTiO 3 , [9] and carbon nitride (CN). [10-14] Photocatalysts based on some of these semiconductors have achieved operational stabilities exceeding 1000 h and maximum external quantum efficiencies (EQEs) of over 50% for overall water splitting. [9,15-18] However, their wide and difficult to tune bandgaps mean that photocatalysts fabricated from these semiconductors are almost exclusively active at UV wavelengths, which carry <5% of solar energy. [19] This fundamentally limits their efficiency below what is required for many practical solar fuels applications. For example, an estimated solar-to-hydrogen efficiency (η STH) of 5-10% would be required to photocatalytically produce H 2 at a cost that meets the U.S. Department of Energy's target of $2-4 kg −1 , which is difficult or impossible to achieve with the aforementioned wide bandgap semiconductors. [20] This has stimulated interest in developing novel photocatalysts based on semiconductors with narrower bandgaps that are able to absorb a greater proportion of the solar spectrum and can therefore achieve higher maximum theoretical solar energy conversion efficiencies. [18] Among these, non-CN organic semiconductors have recently gained prominence due to the Earth abundance of their constituent elements, and their high extinction coefficients and The photocatalytic synthesis of solar fuels such as hydrogen and methane from water and carbon dioxide is a promising strategy to store abundant solar energy in order to overcome its intermittency. Although this approach has been studied for decades using inorganic semiconductor photocatalysts, organic semiconductors have only recently gained notable attention. The tunable energy levels of organic semiconductors can enable the design of photocatalysts with optimized solar light utilization. However,...

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“…Besides photocatalytic water splitting to generate H2, CO2 capture and photoreduction to useful industrial raw materials is another potential application in bifunctional CMPs. [135][136][137] Liu and coworkers demonstrated the synthesis of several Eosin Yfunctionalized CMPs and their photocatalytic activities in the evaluation of CO 2 photoreduction. 138 PEosinY-1 prepared by the Eosin Y and 1,4-diethynylbenzene in the presence of tetrakis(triphenylphosphine) palladium and cuprous iodide had a BET surface area of 445 m 2 g −1 with the best performance for the CO2 photoreduction under visible-light irradiation, affording 92 % selective reduction for CO combining with a production rate up to 33 μmol g −1 h −1 .…”

Section: Photocatalysismentioning

confidence: 99%

Rational design of bifunctional conjugated microporous polymers

et al. 2021

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Triphenylamine based conjugated microporous polymers for selective photoreduction of CO₂ to CO under visible light

Abstract: Two novel triphenylamine based conjugated microporous polymers are designed and synthesized for photocatalytic CO2 reduction using water vapor as electron donor under ambient condition (>420 nm).

Cited by 74 publications

References 40 publications

Porous Organic Polymers for Photocatalytic Carbon Dioxide Reduction

Porous Organic Polymers for Photocatalytic Carbon Dioxide Reduction

Photocatalysts Based on Organic Semiconductors with Tunable Energy Levels for Solar Fuel Applications

Rational design of bifunctional conjugated microporous polymers

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Triphenylamine based conjugated microporous polymers for selective photoreduction of CO2 to CO under visible light

Abstract: Two novel triphenylamine based conjugated microporous polymers are designed and synthesized for photocatalytic CO2 reduction using water vapor as electron donor under ambient condition (>420 nm).

Cited by 74 publications

References 40 publications

Porous Organic Polymers for Photocatalytic Carbon Dioxide Reduction

Porous Organic Polymers for Photocatalytic Carbon Dioxide Reduction

Photocatalysts Based on Organic Semiconductors with Tunable Energy Levels for Solar Fuel Applications

Rational design of bifunctional conjugated microporous polymers

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Triphenylamine based conjugated microporous polymers for selective photoreduction of CO₂ to CO under visible light