Conjugated Polymer‐Based Nanocomposites as Photocatalysts

Gogoi, Rituporn; Dutt, Sunil; Siril, Prem Felix

doi:10.1002/9783527820115.ch8

Cited by 7 publications

(8 citation statements)

References 94 publications

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“…The CPs based photocatalytic activity can be enhanced by making heterojunctions where CPs in CPNCs tune the band positions via doping with semiconducting materials that assist in resolving the before mentioned challenges. [190] The use of CPNCs in photocatalysts relies upon the solidsolid and the liquid-solid interfaces, and various possible heterojunctions like semiconductor -semiconductor, p-n types, non-p-n type, IÀ I type, or Z scheme type (Type II). The p-n heterojunction is considered superior because it facilitates better charge transfer efficiency caused by the greater potential difference existing at the interface.…”

Section: Conjugated Polymer-based Nanocomposites (Cpncs)mentioning

confidence: 99%

“…[188,189] Sometimes the preparation of CPNCs is also carried out by template-free strategy by assuming the consideration of non-covalent interactions such as hydrogen bonding, ionic interactions, solubility, and dispersibility that also facilitate avoiding post-processing activities. [190] In a photocatalytic process, minimization of charge recombination and increase in charge transfer are the key strategies as well as key challenges needed to be addressed. Charge recombination is one of the most important challenges because the photogenerated exciton is more prone to recombination owing to the entrapment of carriers in the bulk and surface of the semiconducting materials.…”

Section: Conjugated Polymer-based Nanocomposites (Cpncs)mentioning

confidence: 99%

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Photocatalytic Water‐Splitting by Organic Conjugated Polymers: Opportunities and Challenges

Mansha

Ahmad

Khan

et al. 2022

The Chemical Record

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The future challenges associated with the shortage of fossil fuels and their current environmental impacts intrigued the researchers to look for alternative ways of generating green energy. Solar‐driven water splitting into oxygen and hydrogen is one of those advanced strategies. Researchers have studied various semiconductor materials to achieve potential results. However, it encountered multiple challenges such as high cost, low photostability and efficiency, and required multistep modifications. The conjugated polymers (CPs) have emerged as promising alternatives for conventional inorganic semiconductors. The CPs offer low cost, sufficient light absorption efficiency, excellent photo and chemical stability, and molecular optoelectronic tunable characteristics. Furthermore, organic CPs also present higher flexibility to tune the basic framework of the backbone of the polymers, amendments in the sidechain to incorporate desired functionalities, and much‐needed porosity to serve better for photocatalytic applications. This review article summarizes the recent advancements made in visible‐light‐driven water splitting covering the aspects of synthetic strategies and experimental parameters employed for water splitting reactions with special emphasis on conjugated polymers such as linear CPs, planarized CPs, graphitic carbon nitride (g‐C3N4), conjugated microporous polymers (CMPs), covalent organic frameworks (COFs), and conjugated polymer‐based nanocomposites (CPNCs). The current challenges and future prospects have also been described briefly.

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Section: Conjugated Polymer-based Nanocomposites (Cpncs)mentioning

confidence: 99%

Section: Conjugated Polymer-based Nanocomposites (Cpncs)mentioning

confidence: 99%

Photocatalytic Water‐Splitting by Organic Conjugated Polymers: Opportunities and Challenges

Mansha

Ahmad

Khan

et al. 2022

The Chemical Record

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show abstract

“…[6][7][8] Photocatalysts can activate molecular oxygen into several oxidizing species such as superoxide (O2 •-), singlet oxygen ( 1 O2), and hydroxyl radicals ( • OH). 9,10 Several metal-based photocatalysts are already reported for the activation of molecular oxygen. 4,11,12 Metallic catalysts often result in metal contamination of the product and thus increase production cost due to the need for an additional step of purification.…”

Section: Introductionmentioning

confidence: 99%

Metal-free Conjugated Polyphenothiazine Nanostructures as Visible Light Active Photocatalysts for the Removal of Organic Pollutants and Selective Aerobic Oxidation of Sulfides

Gogoi

Jena

Singh

et al. 2023

Preprint

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Phenothiazine (PTZ) and its derivatives have traditionally been used for photocatalytic molecular oxygen activation in a variety of chemical transformation processes. Despite having a high reduction potential, phenothiazine is transparent under visible light and thus has limited photocatalytic activity at low energies of incidence. We have synthesized highly conjugated polyphenothiazine (PPTZ) nanomaterials via Chemical oxidative polymerization (COP) of PTZ in a one-pot reaction. Polymerization with metal-free oxidizing agents converted PTZ from being a UV-active material to visible light active via π-conjugation extension. Thus, PPTZ was found to be a highly active metal-free photocatalyst for the selective aerobic oxidation of alkyl arylthiosulfide to the corresponding sulfoxide under visible light. This is the first example of metal-free, conjugated PPTZ nanoparticles as a visible light-active photocatalyst for the activation of triplet molecular oxygen. The reduction potential of PPTZ was found to be suitable for the activation of triplet oxygen to produce a moderately reactive superoxide radical anion (O2⋅−) for selective oxidation reactions. PPTZ also exhibited highly active photocatalytic decomposition of organic pollutants under aerobic conditions.

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“…(Gogoi et al 2021) Nanostructuring and nanocomposite formation were found to be effective strategies to enhance the photocatalytic application of CP. (Ghosh et al 2015;Gogoi et al 2021Gogoi et al , 2022a Among the CP, the high intrinsic electrical conductivity of PPy (Xu et al 2017) render it useful for the improvement of light absorption and charge separation at the interface in composite photocatalysts. (Yuan et al 2020) The efficiency of semiconductor photocatalysts for photocatalysis has increased due to the incorporation of PPy as PPy-Ag2MoO4 nanocomposite (Abinaya et al 2019), PPy-TiO2 nanocomposite (Dimitrijevic et al 2013), PPy-BiVO4 nanocomposite (Lv et al 2021) and PPy-BiOI nanocomposite (Xu et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Z-Scheme Fe-nPPy/BiOI Nanocomposite for Enhanced Visible Light Driven Photocatalytic Activity

Kumar

Gogoi

Sharma

et al. 2023

Preprint

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In this work, conducting polymer (CP) and bismuth oxyiodide (BiOI) based Z-scheme nanocomposite photocatalysts were prepared at room temperature. The nanocomposite formation with intimate interfaces were confirmed by advanced characterization techniques. In comparison to pure BiOI and Fe-nPPy, the hybrid nanocomposite, Fe-nPPy/BiOI showed significant enhancement in photocatalytic degradation of crystal violet (CV) dye when exposed to a visible light source. The photocatalyst was versatile for photocatalytic environment remediation as it could degrade pharmaceutical pollutant tetracycline (TC) also. The proper alignment of band edge potential and better interfacial contact between Fe-nPPy and BiOI, which reduce charge recombination in the nanocomposite and enable their better utilisation for the photocatalytic degradation reaction, were attributed to the better photocatalytic performance of the Fe-nPPy/BiOI nanocomposite. Further, the photogenerated electrons were acting as the primary reactive species responsible for degradation process, as per trapping experiments.

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Conjugated Polymer‐Based Nanocomposites as Photocatalysts

Cited by 7 publications

References 94 publications

Photocatalytic Water‐Splitting by Organic Conjugated Polymers: Opportunities and Challenges

Photocatalytic Water‐Splitting by Organic Conjugated Polymers: Opportunities and Challenges

Metal-free Conjugated Polyphenothiazine Nanostructures as Visible Light Active Photocatalysts for the Removal of Organic Pollutants and Selective Aerobic Oxidation of Sulfides

Facile Synthesis of Z-Scheme Fe-nPPy/BiOI Nanocomposite for Enhanced Visible Light Driven Photocatalytic Activity

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