Journal ArticleDOI
Metal-free carbon nitride photocatalysis with in situ hydrogen peroxide generation for the degradation of aromatic compounds
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TLDR
In this paper, the photocatalytic performance of a thermally exfoliated carbon nitride material was investigated in aqueous solution and employing visible-light emitting diodes (LEDs) as radiation source.Abstract:
The photocatalytic performance of a thermally exfoliated carbon nitride material was investigated in aqueous solution and employing visible-light emitting diodes (LEDs) as radiation source (λmax = 417 nm). The operating conditions were studied using phenol as model compound. The increase on the surface area of the catalyst with the exfoliation treatment promotes faster degradation and mineralization rates and an easier reduction of O2 into H2O2. The H2O2 production takes place only in the presence of both phenol and dissolved oxygen. The study was followed by assessing the photocatalytic degradation of ten organic compounds (individually or in a mixture) commonly found in agro-industrial wastewaters (phenol, catechol, resorcinol, hydroquinone, benzoic acid, 4-hydroxybenzoic acid, protocatechuic acid, gallic acid, 4-methoxyphenol and tyrosol). These compounds were selected to study the position, order and nature of substitution on the aromatic ring as well as the possible influence of the pKa. Generally, more reactive compounds yield higher amounts of H2O2 formed, whereas the pKa does not affect photocatalysis owing to the amphoteric properties of the catalyst. Thus, the successful oxidation of the organic compounds achieved in situ generation of H2O2 with relatively high productivities using a metal-free carbon nitride material stable in consecutive runs.read more
Citations
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A comparative perspective of electrochemical and photochemical approaches for catalytic H2O2 production
TL;DR: This review compares and contrast the two distinct yet inherently closely linked catalytic processes, before detailing recent advances in the design, preparation, and applications of different H2O2 catalyst systems from the viewpoint of electrochemical and photochemical approaches.
Journal ArticleDOI
Surface modified C, O co-doped polymeric g-C3N4 as an efficient photocatalyst for visible light assisted CO2 reduction and H2O2 production
Subhajyoti Samanta,Rajkumar Yadav,Rajkumar Yadav,Abhinav Kumar,Anil K. Sinha,Anil K. Sinha,Rajendra Srivastava +6 more
TL;DR: In this paper, a surface modified g-C3N4 was synthesized by the co-condensation of urea+thiourea and 2-methyl imidazole.
Journal ArticleDOI
Service life and stability of electrodes applied in electrochemical advanced oxidation processes: A comprehensive review
Masoud Moradi,Yasser Vasseghian,Alireza Khataee,Alireza Khataee,Alireza Khataee,Mehmet Kobya,Hossein Arabzade,Elena-Niculina Dragoi +7 more
TL;DR: In this article, the authors analyzed the electrochemical advanced oxidation processes (EAOPs) aspects, with a focus on the comparison of stability, lifetime and service life of electrodes.
Journal ArticleDOI
Water‐soluble polymeric carbon nitride colloidal nanoparticles for highly selective quasi‐homogeneous photocatalysis
Igor Krivtsov,Igor Krivtsov,Dariusz Mitoraj,Christiane Adler,Marina Ilkaeva,Mariana Sardo,Luís Mafra,Christof Neumann,Andrey Turchanin,Chunyu Li,Chunyu Li,Benjamin Dietzek,Benjamin Dietzek,Robert Leiter,Johannes Biskupek,Ute Kaiser,Changbin Im,Bjoern Kirchhoff,Bjoern Kirchhoff,Timo Jacob,Timo Jacob,Radim Beranek +21 more
TL;DR: A bottom‐up preparation of PCN nanoparticles with a narrow size distribution is reported, which are fully soluble in water showing no gelation or precipitation over several months, and allow photocatalysis to be carried out under quasi‐homogeneous conditions.
Journal ArticleDOI
Fabrication of ultra-thin g-C3N4 nanoplates for efficient visible-light photocatalytic H2O2 production via two-electron oxygen reduction
TL;DR: In this paper, ultrathin graphitic carbon nitride (g-C3N4) nanoplates with thickness of 1-3nm were introduced for the efficient hydrogen peroxide (H2O2) production.
References
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Graphitic Carbon Nitride (g-C3N4)-Based Photocatalysts for Artificial Photosynthesis and Environmental Remediation: Are We a Step Closer To Achieving Sustainability?
TL;DR: It is anticipated that this review can stimulate a new research doorway to facilitate the next generation of g-C3N4-based photocatalysts with ameliorated performances by harnessing the outstanding structural, electronic, and optical properties for the development of a sustainable future without environmental detriment.
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Colorimetric Determination of Hydrogen Peroxide
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Graphitic carbon nitride (g-C3N4) nanocomposites: A new and exciting generation of visible light driven photocatalysts for environmental pollution remediation
Gcina Mamba,Ajay K. Mishra +1 more
TL;DR: In this article, a review of the fundamental aspects of photocatalysis as a pollution remediation strategy is presented, followed by an introduction to graphitic carbon nitride as a photocatalyst, preparation strategies and its properties, and a comprehensive and critical discussion of the various most recent developments towards enhancing the visible light photocatalytic properties of g-C 3 N 4 for pollution alleviation.
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Mesoporous Au/TiO2 nanocomposites with enhanced photocatalytic activity.
TL;DR: Mesoporous Au/TiO2 nanocomposites with Au nanoparticles homogeneously embedded within crystalline TiO2 framework were synthesized using a simple one-pot assembly approach and exhibit significantly enhanced photocatalytic activity.
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Isoelectric point and adsorption activity of porous g-C3N4
TL;DR: In this paper, three types of graphitic carbon nitrides (g-C3N4) were synthesized by directly heating melamine, thiourea, and urea.