Polydopamine and Barbituric Acid Co‐Modified Carbon Nitride Nanospheres for Highly Active and Selective Photocatalytic CO<sub>2</sub> Reduction

Li, Mei; Zhang, Shengbo; Liu, Xiao; Han, Jinyu; Zhu, Xinli; Ge, Qingfeng; Wang, Hua

doi:10.1002/ejic.201801249

Cited by 14 publications

(11 citation statements)

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“…It has been shown that amine-functionalized metal-oxide can capture CO 2 efficiently by forming a strongly chemisorbed species, which not only promotes the activation of CO 2 but also improves the selectivity toward CO 2 reduction. , Polydopamine contains a large number of amino groups and can be easily anchored on various surfaces . In our previous study, the photocatalyst of carbon nitride nanospheres modified with PDA exhibited a remarkably enhanced CO 2 adsorption capacity and high efficiency of photocatalytic reduction of CO 2 …”

Section: Introductionmentioning

confidence: 99%

“…38 In our previous study, the photocatalyst of carbon nitride nanospheres modified with PDA exhibited a remarkably enhanced CO 2 adsorption capacity and high efficiency of photocatalytic reduction of CO 2 . 39 Herein, a PDA modified hollow ZnO/Co 3 O 4 p-n heterojunction photocatalyst was constructed by pyrolyzing bimetallic ZnCo-ZIFs followed by PDA modification and tested for photocatalytic CO 2 reduction. The resulting PDA 15 /ZnO/ Co 3 O 4 catalysts exhibited an impressive CO evolution rate of 537.5 μmol/g/h and a high selectivity of 97.7% without using the photosensitizer and additional sacrificial agent.…”

Section: ■ Introductionmentioning

confidence: 99%

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Construction of Highly Active and Selective Polydopamine Modified Hollow ZnO/Co₃O₄ p-n Heterojunction Catalyst for Photocatalytic CO₂ Reduction

Zhang

Liu

et al. 2020

ACS Sustainable Chem. Eng.

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The facile synthesis of low-cost, eco-friendly photocatalysts with high charge separation efficiency and CO2 adsorption capacity for efficient photocatalytic CO2 reduction remains a challenge. Herein, a hollow structured p-n heterojunction catalyst, polydopamine (PDA)-ZnO/Co3O4, was successfully synthesized by pyrolyzing bimetallic ZnCo-ZIFs, followed by modification with PDA. Through optimizing the Zn/Co ratio, a high separation efficiency of the photogenerated electron–hole pairs has been achieved. Furthermore, by tuning the content of PDA on the surface of ZnO/Co3O4, the adsorption capacity of CO2 can be maximized. Consequently, PDA15/ZnO/Co3O4 showed a CO production rate of 537.5 μmol/g/h with a CO selectivity of 97.7% without using the photosensitizer and additional sacrificial agent. Band structure based on results of X-ray photoelectron spectroscopy, photoelectrochemical characterization, as well as density functional theory calculation was used to propose a plausible mechanism for photocatalytic CO2 reduction on the PDA15/ZnO/Co3O4. The present study provides an effective approach to fabricate highly efficient photocatalysts based on semiconducting metal oxides for CO2 reduction with remarkable abilities of absorbing lights, separating charge carriers, and adsorbing CO2.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Construction of Highly Active and Selective Polydopamine Modified Hollow ZnO/Co₃O₄ p-n Heterojunction Catalyst for Photocatalytic CO₂ Reduction

Zhang

Liu

et al. 2020

ACS Sustainable Chem. Eng.

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“…When the reaction condition is changed by keeping acetonitrile fixed and replacing TEOA with 10% H 2 O the activity is reduced to 41%, indicating phase separation in aqueous medium ( Table 3, entry 12). 178 CoPPC acts as an electron acceptor and lowers the conduction band edge potential of the overall system (Scheme 15b). A 13 C isotope experiment fully agrees that CO 2 gas is the only source of CO in the reaction.…”

Section: Graphitic Carbon Nitride As a Co 2 Reduction Photocatalystmentioning

confidence: 99%

“…The external quantum efficiency (E.Q.E) of CO is 0.11% and 0.03% at l ex = 400 and 360 nm, respectively ( Table 3, entry 12). 178 Very recently, a 2D g-C 3 N 4 nanosheet has been prepared via one-step tartaric acid-assisted thermal polymerization of dicyandiamide having nitrogen vacancies (g-C 3 N x ) with preferential location at both three-coordinate N atoms and uncondensed terminal NH x species. The material has produced 284.7 mmol g À1 CO and 51.6 mmol g À1 H 2 from the CO 2 gas dissolved in (TEOA + ACN) solution and Co(bpy) 3 2+ as a co-catalyst in 15 h. The charge carrier migration and utilization are demonstrated with transient absorption spectroscopy ( Table 3, entry 13) (Scheme 15d).…”

Section: Graphitic Carbon Nitride As a Co 2 Reduction Photocatalystmentioning

confidence: 99%

Catalytic conversion of CO₂ to chemicals and fuels: the collective thermocatalytic/photocatalytic/electrocatalytic approach with graphitic carbon nitride

2020

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“…Perini and coworkers have developed and applied a Ag 0 ‐PDA/TiO 2 /Ti catalyst in the photoelectrocatalytic reduction of carbon dioxide . In the synthesis process, first a titanium foil underwent electrooxidation in fluoride electrolyte to deliver a nanotube array with perpendicular arrangement (100 nm length, 15 nm tube thickness).…”

Section: Miscellaneous Transformationsmentioning

confidence: 99%

Polydopamine – its Prolific Use as Catalyst and Support Material

Molnár

2020

ChemCatChem

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Polydopamine is a mussel-inspired functional material with a unique ability to form surface coatings. It is a green, environmentally benign product available very easily for a multitude of varied applications. This review attempts to collect useful information with respect to polydopamine-based catalytic studies with the use of polydopamine and modified polydopamine preparations loaded with varied catalytically active species including metal ions and metal particles. Major sections are about the use of polydopamine as catalyst material, utilization of immobilized enzymes, removal of toxic materials, results in organic synthesis, and fuel cell applications. A few examples of chiral catalysis and results of recycling studies are also treated. Data collected and analyzed indicate the importance and high potential of polydopamine-based catalysts in sustainable chemistry. of subunits attacked by an immobilized cyclohexeneamine (5) was suggested to be the transition state of CÀ C bond formation.Edouard et al. prepared catalyst 0.29 % PDA/PU by depositing PDA onto polyurethane foam (PU, 180 � 20 mg, 8 cm 3 ) and used it for the reduction of methylene blue (MB) with NaBH 4 . [48] Activities decreased gradually with repeated uses from 100 % to 35 % in run 11 but partial reactivation was achieved upon keeping the sample at 67°C for 8 h (55 % dropping below 10 % in run 13). Exposure to air at room temperature for six days proved to be somewhat more beneficial (90 % conversion in run 14 decreasing to 48 % in run 18). In a recent study they fabricated two oxidized PDA/PU samples and then loaded them with NaBH 4 . [49] One made by the usual method (dopamine/Tris, rt, 12 h, in air; sample PDA O2 PU), whereas the other was made by treating PU in a mixture of dopamine, NaOAc, and NaIO 4 (pH 5, rt, 24 h). The sample was dried (67°C) and washed thoroughly with water (PDA NaIO4 PU). Both products were dipped into an aqueous solution of NaBH 4 (0.1 M, 10 min) to afford boron contents of 2.37 and 2.11 wt%. The catalysts tested in the degradation of MB showed high activities with efficiencies of 97 % and 98 %, respectively (NaBH 4 /MB molar ratio 40, 177 mg and 209 mg catalysts, 25 min). During five reuses, the pH of the reaction medium increased because of boron loss (0.78 wt% and 0.81 wt%). The activity of PDA NaIO4 PU decreased to 89 % in run five. However, dipping the used sample into a 0.1 M NaBH 4 solution restored the original efficiency of 98 %. This, however, was only a temporary remedy, since a low efficiency of 60 % was measured in run 10. PDA was suggested by the authors to act as a redox mediator to prevent the hydrolysis/oxidation of immobilized borohydride.This formula (5) should be moved up and placed before the paragraph starting with "Edouard et al…"The Zuo group used PDA particles (avg. diameter 240 nm) to induce the reduction of MB and rhodamine B (RhB) with NaBH 4 . [50] Quinone moieties of PDA were assumed to channel electrons from NaBH 4 to the dyes. Indeed, PDA oxidized with NaIO 4 exhibited increased degradatio...

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Polydopamine and Barbituric Acid Co‐Modified Carbon Nitride Nanospheres for Highly Active and Selective Photocatalytic CO₂ Reduction

Cited by 14 publications

References 81 publications

Construction of Highly Active and Selective Polydopamine Modified Hollow ZnO/Co₃O₄ p-n Heterojunction Catalyst for Photocatalytic CO₂ Reduction

Construction of Highly Active and Selective Polydopamine Modified Hollow ZnO/Co₃O₄ p-n Heterojunction Catalyst for Photocatalytic CO₂ Reduction

Catalytic conversion of CO₂ to chemicals and fuels: the collective thermocatalytic/photocatalytic/electrocatalytic approach with graphitic carbon nitride

Polydopamine – its Prolific Use as Catalyst and Support Material

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Polydopamine and Barbituric Acid Co‐Modified Carbon Nitride Nanospheres for Highly Active and Selective Photocatalytic CO2 Reduction

Cited by 14 publications

References 81 publications

Construction of Highly Active and Selective Polydopamine Modified Hollow ZnO/Co3O4 p-n Heterojunction Catalyst for Photocatalytic CO2 Reduction

Construction of Highly Active and Selective Polydopamine Modified Hollow ZnO/Co3O4 p-n Heterojunction Catalyst for Photocatalytic CO2 Reduction

Catalytic conversion of CO2 to chemicals and fuels: the collective thermocatalytic/photocatalytic/electrocatalytic approach with graphitic carbon nitride

Polydopamine – its Prolific Use as Catalyst and Support Material

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Polydopamine and Barbituric Acid Co‐Modified Carbon Nitride Nanospheres for Highly Active and Selective Photocatalytic CO₂ Reduction

Construction of Highly Active and Selective Polydopamine Modified Hollow ZnO/Co₃O₄ p-n Heterojunction Catalyst for Photocatalytic CO₂ Reduction

Construction of Highly Active and Selective Polydopamine Modified Hollow ZnO/Co₃O₄ p-n Heterojunction Catalyst for Photocatalytic CO₂ Reduction

Catalytic conversion of CO₂ to chemicals and fuels: the collective thermocatalytic/photocatalytic/electrocatalytic approach with graphitic carbon nitride