Fluorinated conjugated poly(benzotriazole)/g-C3N4 heterojunctions for significantly enhancing photocatalytic H2 evolution

Ye, Haonan; Wang, Zhiqiang; Yu, Fengtao; Zhang, Shicong; Kong, Kangyi; Gong, X. G.; Hua, Jing; Tian, He

doi:10.1016/j.apcatb.2019.118577

Cited by 64 publications

(32 citation statements)

References 52 publications

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“…Unfortunately, organic polymers often suffer from large exciton binding energy [19][20][21], and inability to transfer four oxidative equivalents for efficient water oxidation [22,23]. Hence, the applications of various organic polymers are mostly limited in semi-reactions of photocatalytic hydrogen evolution, and depend on the use of sacrificial agents (i.e., triethanolamine or triethylamine) [24,25]. The development of single polymer for overall water splitting has become a challenge, because the few polymers win both narrow band gap to absorb visible light and enough over-potential to drive photocatalytic half reaction.…”

Section: Introductionmentioning

confidence: 99%

FeOOH photo-deposited perylene linear polymer with accelerated charge separation for photocatalytic overall water splitting

Wang

et al. 2021

Sci. China Chem.

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It is a challenge to develop single polymer-based photocatalyst for overall water splitting without adding sacrificial agents due to the insufficient driving force for charge separation and the lack of active sites of organic polymer. Metal oxyhyroxides are widely acted as co-catalyst for photoelectrocatalysis oxygen evolution reaction. Here, we firstly report the peryleno[1,12-bcd] thiophene sulfone-based linear co-polymer PS-5 for photocatalytic overall water splitting by photo-depositing simple and low-cost cocatalyst FeOOH under the visible-light illumination. The density functional theory (DFT) calculations and experimental results indicated clearly that the oxygen vacancies-rich β-FeOOH can effectively promote the separation of photo-generated excitons and provide active sites for photocatalytic oxygen evolution reaction. As a result, the average H 2 and O 2 production rates of optimized PS-5/β-FeOOH-0.2M reach at ~170 and ~76.6 μmol h −1 g −1 , respectively, with a stoichiometric ratio at about 2:1.This work provides a simple and low-cost method for the preparation of overall water splitting system based on polymer photocatalyst.

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Section: Introductionmentioning

confidence: 99%

FeOOH photo-deposited perylene linear polymer with accelerated charge separation for photocatalytic overall water splitting

Wang

et al. 2021

Sci. China Chem.

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“…Most of them are Z-scheme g-C 3 N 4 heterojunctions with metal nanoparticles (Au, Ag, Pt, and Bi) or carbon materials (graphene oxide (GO), reduced graphene oxide (rGO) and carbon nanotubes (CNTs)) as electron mediators. The electron mediator accelerates carrier transport at the interface between the two [186] Copyright 2020, Elsevier.…”

Section: Multicomponent Heterojunctionsmentioning

confidence: 99%

“…It was found that the P3/g‐C 3 N 4 was bonded by noncovalent bonds (π–π stacking) and generated a built‐in electric field in the junction region, which facilitated the separation of photo‐induced electrons–holes and enhanced the photocatalytic activity (Figure 23d). In another work, [ 186 ] three D–A polymers with different acceptors, named Flu‐BZ, Flu‐FBZ, and Flu‐DFBZ, were prepared using fluorene as the donor and nitrogen‐rich benzotriazoles containing different numbers of fluorine atoms as acceptors, respectively ( Figure a). They were subsequently heterojunctioned with g‐C 3 N 4 via π–π interactions, respectively, where the Flu‐DFBZ/g‐C 3 N 4 heterojunction had the best photochemical properties.…”

Section: G‐c3n4‐based Heterojunction Photocatalyst and Its Enhancemen...mentioning

confidence: 99%

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Recent Advances in g‐C₃N₄‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

Yang

Sun

et al. 2021

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Rhodamine B (RhB), and methyl orange (MO), are highly toxic and can directly negatively affect the ecosystem and human health through water circulation. Pathogens, such as fungi and bacteria, can disrupt aquatic ecosystems and are closely linked to the incidence of epidemics. [2][3][4][5][6] In developing countries, it is estimated that about 80% of diseases are caused by water-borne pathogens. The abuse of antibiotics has led to their accumulation in the environment, which have given rise to antibiotic-resistant bacteria, and ultimately led to incurable infections that have increased death rates around the world; [7,8] therefore, the effective treatment of organic dye, pathogen, and antibiotic pollutants is a major environmental remediation task.At present, photocatalysis technology can convert solar energy into electric energy, chemical energy, etc., so that solar energy can be directly applied to environmental catalysis, energy catalysis, organic catalysis, sensing, biological imaging, electrochemical energy storage, and other fields. [9] It is considered one of the sustainability strategies to address future environmental crises. [10][11][12] The development of photocatalytic materials determines the progress in photocatalytic technologies. In 1972, Fujishima and Honda [13] used a TiO 2 -modified electrode to decompose water by direct photocatalysis using UV light, which was a milestone that initiated the development of photocatalytic materials. Then, Carey et al. [14] used TiO 2 powder to degrade organic pollutants, which further stimulated researchers' interest in photocatalytic materials. Since then, the development, modification, application, and catalytic mechanism of semiconductor photocatalytic materials represented by TiO 2 have made considerable progress. As research in this field progressed, it was found that the performance of photocatalytic materials mainly depends on the light absorption and electronhole separation efficiency of the photocatalyst; however, due to their wide bandgap, traditional TiO 2 photocatalysts can only use UV light with wavelengths below 387 nm, which account for 5% of the solar energy. To realize the maximum solar energy efficiency, researchers have made many attempts to modify TiO 2 -based photocatalysts. Although the spectral response range and the availability of solar energy have been improved slightly, there are still problems, such as high costs and heavy metal pollution; therefore, a popular research direction has Emerging photocatalytic technology promises to provide an effective solution to the global energy crisis and environmental pollution. Graphite carbon nitride (g-C 3 N 4 ) has gained extensive attention in the scientific community due to its excellent physical and chemical properties, attractive electronic band structure, and low cost. In this paper, research progress in design strategies for g-C 3 N 4 -based photocatalysts in the past five years is reviewed from the perspectives of nanostructure construction, element doping, and heterostructure construction...

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“…It suggests that polymer/polymer heterojunctions could effectively improve the intermolecular charge transfer and suppress charge recombination. In addition, Tian et al developed a series of polymer/polymer heterojunctions with CPs and g-C 3 N 4 [ 94 ]. In particular, the heterojunction between benzotriazole–fluorene-based P77 ( Figure 10 ) and g-C 3 N 4 endowed a high AQT of 33.5% at 450 nm.…”

Section: Reviewmentioning

confidence: 99%

Nanoporous and nonporous conjugated donor–acceptor polymer semiconductors for photocatalytic hydrogen production

Sheng¹,

Xing²,

Chen³

et al. 2021

Beilstein J. Nanotechnol.

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Conjugated polymers (CPs) as photocatalysts have evoked substantial interest. Their geometries and physical (e.g., chemical and thermal stability and solubility), optical (e.g., light absorption range), and electronic properties (e.g., charge carrier mobility, redox potential, and exciton binding energy) can be easily tuned via structural design. In addition, they are of light weight (i.e., mainly composed of C, N, O, and S). To improve the photocatalytic performance of CPs and better understand the catalytic mechanisms, many strategies with respect to material design have been proposed. These include tuning the bandgap, enlarging the surface area, enabling more efficient separation of electron–hole pairs, and enhancing the charge carrier mobility. In particular, donor–acceptor (D–A) polymers were demonstrated as a promising platform to develop high-performance photocatalysts due to their easily tunable bandgaps, high charge carrier mobility, and efficient intramolecular charge transfer. In this minireview, recent advances of D–A polymers in photocatalytic hydrogen evolution are summarized with a particular focus on modulating the optical and electronic properties of CPs by varying the acceptor units. The challenges and prospects associated with D–A polymer-based photocatalysts are described as well.

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Fluorinated conjugated poly(benzotriazole)/g-C3N4 heterojunctions for significantly enhancing photocatalytic H2 evolution

Cited by 64 publications

References 52 publications

FeOOH photo-deposited perylene linear polymer with accelerated charge separation for photocatalytic overall water splitting

FeOOH photo-deposited perylene linear polymer with accelerated charge separation for photocatalytic overall water splitting

Recent Advances in g‐C₃N₄‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

Nanoporous and nonporous conjugated donor–acceptor polymer semiconductors for photocatalytic hydrogen production

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Fluorinated conjugated poly(benzotriazole)/g-C3N4 heterojunctions for significantly enhancing photocatalytic H2 evolution

Cited by 64 publications

References 52 publications

FeOOH photo-deposited perylene linear polymer with accelerated charge separation for photocatalytic overall water splitting

FeOOH photo-deposited perylene linear polymer with accelerated charge separation for photocatalytic overall water splitting

Recent Advances in g‐C3N4‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

Nanoporous and nonporous conjugated donor–acceptor polymer semiconductors for photocatalytic hydrogen production

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Recent Advances in g‐C₃N₄‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications