Fabrication of flower-like copper cobaltite/graphitic-carbon nitride (CuCo 2 O 4 /g-C 3 N 4 ) composite with superior photocatalytic activity

Jeghan, Shrine Maria Nithya; Yeon, Jeong; Kang, Misook

doi:10.1016/j.jiec.2017.08.049

Cited by 70 publications

(15 citation statements)

References 65 publications

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“…Where,

E_{normalC normalB}

and

E_{normalV normalB}

, are the CB and VB potentials in eV respectively, χ is the absolute electronegativity,

E_{e}

is the energy of free electrons (

E_{e}

=4.5 eV vs . NHE), and

{normalE}_{normalg}

is the bandgap of the semiconductor [29] . The CB and VB potential of each component was calculated and a band energy diagram designed accordingly is presented in the Figure 5f.…”

Section: Resultsmentioning

confidence: 99%

“…Where, E CB and E VB , are the CB and VB potentials in eV respectively, χ is the absolute electronegativity, E e is the energy of free electrons (E e = 4.5 eV vs. NHE), and E g is the bandgap of the semiconductor. [29] The CB and VB potential of each component was calculated and a band energy diagram designed accordingly is presented in the Figure 5f. The energy band diagram obtained suggested that the FO-PFO/CN ternary system favors the formation of double Z-scheme heterostructure.…”

Section: Photocatalytic Reaction Mechanismmentioning

confidence: 99%

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Exciton Dissociation on Double Z‐scheme Heterojunction for Photocatalytic Application

et al. 2021

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Constructing heterojunction is one of the promising approaches to obtain desired photocatalysts with enhanced photocatalytic activity. Herein, we have fabricated a Fe 2 O 3 -PrFeO 3 /g-C 3 N 4 ternary heterostructure by a simple wet chemical method to improve the photocatalytic activity of pristine g-C 3 N 4 . The as-prepared catalyst has shown 7.8 times higher photocatalytic degradation of dye acid violet 7 and generated 379.29 μmolL À 1 h À 1 of ammonia under visible-light irradiation.The ternary heterojunction was found to form a double Zscheme heterojunction that facilitates interfacial electron transfer, promotes the separation of photogenerated charge carriers, and also enhances light harvesting property. The enhanced photocatalytic performance of the catalyst is ascribed to the formation of double Z-scheme heterojunction, which offers low charge transfer resistance thereby lowering the recombination of photoexcitons and increasing the lifetime of photoexcitons.

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“…Where,

E_{normalC normalB}

and

E_{normalV normalB}

, are the CB and VB potentials in eV respectively, χ is the absolute electronegativity,

E_{e}

is the energy of free electrons (

E_{e}

=4.5 eV vs . NHE), and

{normalE}_{normalg}

is the bandgap of the semiconductor [29] . The CB and VB potential of each component was calculated and a band energy diagram designed accordingly is presented in the Figure 5f.…”

Section: Resultsmentioning

confidence: 99%

Section: Photocatalytic Reaction Mechanismmentioning

confidence: 99%

Exciton Dissociation on Double Z‐scheme Heterojunction for Photocatalytic Application

et al. 2021

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“…The removal of dyes from wastewater is challenging and of major environmental concern as an estimated 700,000 tonnes are produced yearly and after use are discarded into water bodies, often without any post-treatment [15]. Consequently, testing for the degradation of dyes and other photosensitive compounds has been conducted [16][17][18][19]. This is partly because it is a simple and low-cost method of testing new photocatalytic materials.…”

Section: Figurementioning

confidence: 99%

A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment

McMichael

Fernández‐Ibáñez

Byrne

2021

Water

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The photoexcitation of suitable semiconducting materials in aqueous environments can lead to the production of reactive oxygen species (ROS). ROS can inactivate microorganisms and degrade a range of chemical compounds. In the case of heterogeneous photocatalysis, semiconducting materials may suffer from fast recombination of electron–hole pairs and require post-treatment to separate the photocatalyst when a suspension system is used. To reduce recombination and improve the rate of degradation, an externally applied electrical bias can be used where the semiconducting material is immobilised onto an electrically conducive support and connected to a counter electrode. These electrochemically assisted photocatalytic systems have been termed “photoelectrocatalytic” (PEC). This review will explain the fundamental mechanism of PECs, photoelectrodes, the different types of PEC reactors reported in the literature, the (photo)electrodes used, the contaminants degraded, the key findings and prospects in the research area.

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“…However, large‐scale applications of this photocatalyst hindered by several shortcomings of serious recombination of the photoinduced charges, poor electrical conductivity, smaller specific surface area, and poor visible‐light absorption . Strategies such as modification of textural properties, heterojunction construction, elemental doping, and morphology control have been adopted to increase the photocatalytic performance of g‐C 3 N 4 …”

Section: Introductionmentioning

confidence: 99%

Novel g‐C₃N₄ nanosheets/CDs/BiOCl photocatalysts with exceptional activity under visible light

2018

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We fabricated novel ternary nanocomposites through integration of C‐dots (carbon dots), BiOCl, and nanosheets of graphitic carbon nitride (g‐C3N4 nanosheets) by a cost‐effective route. The fabricated photocatalysts were subsequently characterized by XRD, EDX, TEM, HRTEM, XPS, FT‐IR, UV‐vis DRS, TGA, BET, and PL methods to gain their structure, purity, morphology, optical, textural, and thermal properties. In addition, the degradation intermediates were identified by gas chromatography‐mass spectroscopy (GC‐MS). Photocatalytic performance of the synthesized samples was studied by photodegradations of three cationic (RhB, MB, and fuchsine), one anionic (MO) dyes, one colorless (phenol) pollutant and removal of an inorganic pollutant (Cr(VI)) under visible light. It was revealed that the ternary nanocomposite with loading 20% of BiOCl illustrated superlative performances in the selected photocatalytic reactions compared with the corresponding bare and binary photocatalysts. Visible‐light photocatalytic activity of the g‐C3N4 nanosheets/CDs/BiOCl (20%) nanocomposite was 42.6, 27.8, 24.8, 20.2, and 15.9 times higher than the pure g‐C3N4 for removal of RhB, MB, MO, fuchsine, and phenol, respectively. Likewise, the ternary photocatalyst showed enhanced activity of 15.3 times relative to the g‐C3N4 in photoreduction of Cr(VI). Moreover, the ternary nanocomposite exhibited excellent chemical stability and recyclability after five cycles. Finally, the mechanism for improved photocatalytic performance was discussed based on the band potential positions.

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Fabrication of flower-like copper cobaltite/graphitic-carbon nitride (CuCo 2 O 4 /g-C 3 N 4 ) composite with superior photocatalytic activity

Cited by 70 publications

References 65 publications

Exciton Dissociation on Double Z‐scheme Heterojunction for Photocatalytic Application

Exciton Dissociation on Double Z‐scheme Heterojunction for Photocatalytic Application

A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment

Novel g‐C₃N₄ nanosheets/CDs/BiOCl photocatalysts with exceptional activity under visible light

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Fabrication of flower-like copper cobaltite/graphitic-carbon nitride (CuCo 2 O 4 /g-C 3 N 4 ) composite with superior photocatalytic activity

Cited by 70 publications

References 65 publications

Exciton Dissociation on Double Z‐scheme Heterojunction for Photocatalytic Application

Exciton Dissociation on Double Z‐scheme Heterojunction for Photocatalytic Application

A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment

Novel g‐C3N4 nanosheets/CDs/BiOCl photocatalysts with exceptional activity under visible light

Contact Info

Product

Resources

About

Novel g‐C₃N₄ nanosheets/CDs/BiOCl photocatalysts with exceptional activity under visible light