Constructing graphite-like carbon nitride modified hierarchical yolk–shell TiO2 spheres for water pollution treatment and hydrogen production

2016 ◽  
Vol 4 (5) ◽  
pp. 1806-1818 ◽  
Author(s):  
Zhifeng Jiang ◽  
Chengzhang Zhu ◽  
Weiming Wan ◽  
Kun Qian ◽  
Jimin Xie
Keyword(s):  
Water Pollution ◽  
Hydrogen Production ◽  
Visible Light ◽  
Carbon Nitride ◽  
Porous Graphitic Carbon ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Pollution Treatment ◽  
Visible Light Active ◽  
Active Composite

Here we present a new visible light active composite based on porous graphitic carbon nitride decorated hierarchical yolk–shell TiO2 spheres for water pollution treatment and H2 evolution.

scholarly journals Investigation of Fe-Doped Graphitic Carbon Nitride-Silver Tungstate as a Ternary Visible Light Active Photocatalyst

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Eid H. Alosaimi ◽  
Nadia Azeem ◽  
Noor Tahir ◽  
Asim Jilani ◽  
Muhammad Zahid ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Visible Light ◽  
Metal Oxides ◽  
Advanced Oxidation Processes ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Oxidation Processes ◽  
Visible Light Active ◽  
Silver Tungstate

The rapid population growth and economic development have largely contributed to environmental pollution. Various advanced oxidation processes have been used as the most viable solution for the reduction of recalcitrant pollutants and wastewater treatment. Heterogeneous photocatalysis is one of the broadly used technologies for wastewater treatment among all advanced oxidation processes. Graphitic carbon nitride alone or in combination with various other semiconductor metal oxide materials acts as a competent visible light active photocatalyst for the removal of recalcitrant organic pollutants from wastewater. Rational designing of an environment-friendly photocatalyst through a facile synthetic approach encounters various challenges in photocatalytic technologies dealing with semiconductor metal oxides. Doping in g-C3N4 and subsequent coupling with metal oxides have shown remarkable enhancement in the photodegradation activity of g-C3N4-based nanocomposites owing to the modulation in g-C3N4 bandgap structuring and surface area. In the current study, a novel ternary Fe-doped g-C3N4/Ag2WO4 visible light active photocatalyst was fabricated through an ultrasonic-assisted facile hydrothermal method. Characterization analysis included SEM analysis, FTIR, XRD, XPS, and UV-Visible techniques to elucidate the morphology and chemical structuring of the as-prepared heterostructure. The bandgap energies were assessed using the Tauc plot. The ternary nanocomposite (Fe-CN-AW) showed increased photodegradation efficiency (97%) within 120 minutes, at optimal conditions of pH = 8, catalyst dose = 50 mg/100 ml, an initial RhB concentration of 10 ppm, and oxidant dose 5 mM under sunlight irradiation. The enhanced photodegradation of rhodamine B dye by ternary Fe-CN-AW was credited to multielectron transfer pathways due to insertion of a Fe dopant in graphitic carbon nitride and subsequent coupling with silver tungstate. The data were statistically assessed by the response surface methodology.

Graphitic Carbon Nitride-Titanium Dioxide Nanocomposite for Photocatalytic Hydrogen Production under Visible Light

2016 ◽  
Vol 14 (4) ◽  
pp. 851-858 ◽  
Author(s):  
Mohammad Reza Gholipour ◽  
Francois Béland ◽  
Trong-On Do
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Carbon Nitride ◽  
Fossil Fuels ◽  
Clean Energy ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Conduction Band Edge ◽  
Photocatalytic Efficiency ◽  
Photocatalytic Reactions

Abstract Hydrogen production from water splitting via photocatalytic reactions can be an alternative clean energy of fossil fuels in the future. Graphitic carbon nitride (g-C3N4) is one of the active photocatalysts in the visible light region that can be combined with other semiconductors in order to increase its photocatalytic efficiency. TiO2 is one of the most appropriate choices to combine with g-C3N4 because of its conduction band edge and variety forms of nanostructures. In this work, nanosheets of g-C3N4 were mixed with the nanoparticles of titanate in order to enhance charge separation and photocatalytic efficiency. Consequently, the hydrogen evolution of this novel nanocomposite produced almost double hydrogen in comparison with g-C3N4.

Heptazine-based porous graphitic carbon nitride: a visible-light driven photocatalyst for water splitting

2019 ◽  
Vol 7 (36) ◽  
pp. 20799-20805 ◽  
Author(s):  
Bin Liu ◽  
Bo Xu ◽  
Shenchang Li ◽  
Jinli Du ◽  
Zhiguo Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Carbon Nitride ◽  
Porous Graphitic Carbon ◽  
Graphitic Carbon ◽  
Band Alignment ◽  
Graphitic Carbon Nitride ◽  
Visible Light Driven

Heptazine-based porous graphitic carbon nitride with a suitable band alignment with respect to the water redox levels for water splitting.

Graphitic carbon nitride/Na2Ti3O7/V2O5 nanocomposite as a visible light active photocatalyst

2020 ◽  
Vol 46 (11) ◽  
pp. 18287-18296 ◽  
Author(s):  
S.V. Prabhakar Vattikuti ◽  
Nguyen Dang Nam ◽  
Jaesool Shim
Keyword(s):  
Visible Light ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Visible Light Active
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