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Showing 1 to 13 of 13 for “"g-C3N4"”.
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Desenvolvimento de heterojunções constituídas de ZnO/g-C3N4 e ZnFe2O4/g-C3N4 para fotodegradação de contaminantes orgânicos emergentes
… In this work, different heterojunctions of ZnO/g-C3N4 and ZnFe2O4/g-C3N4 in different mass proportions of g-C3N4 (10, 50, and 80 %) were synthesized through a simple method of mixing, sonication and heat treatment. The influence of the amount of g-C3N4 in the heterojunctions as well as the …
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Photocatalytic Degradation of Perfluorooctanoic Acid in Water by Free and Immobilised ZnO, g-C3N4 and Their Composite under UV and Visible Light Irradiation
Perfluorooctanoic acid (PFOA) is among perfluoroalkyl and polyfluoroalkyl substances (PFAS) that is widely detected in the environment. ZnO and graphitic carbon nitride are among the most economical semiconductors which have not been widely used for PFOA decomposition. Therefore, ZnO could be an …
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Fotocatalisadores para degradação de compostos tóxicos da indústria do petróleo e petroquímica
… ou combinado com nitreto de carbono grafítico (g C3N4), hematita (Fe2O3), magnetita (Fe3O4) e óxido de cobre (CuO), ativados por uma fonte de radiação, geram esses radicais na presença de oxigênio dissolvido na água. O objetivo deste trabalho foi preparar e caracterizar fotocatalisadores de …
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Photocatalytic degradation of pharmaceuticals in water: Design of nanocatalysts and study of by-products and mechanism
… La capacidad fotocatalítica del TiO2 y g-C3N4 se modificó depositando nanopartículas sobre ellos, o mediante uniones entre materiales, lo que aumentó su capacidad fotocatalítica. En algunos casos se estudió el efecto del pH en las degradaciones y la estabilidad del g-C3N4 en algunas …
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"Reactive hard templating" : from carbon nitrides to metal nitrides
… difficult. Graphitic carbon nitride, g-C3N4, despite its fundamental and theoretical importance, is probably one of the most promising materials to complement carbon in material science and many efforts are put in the synthesis of this material. A simple polyaddition/elimination reaction …
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Advances in Phenyl-Modified Carbon Nitride: Towards Sustainable Environmental Applications
… Traditional graphitic carbon nitride (g-C3N4) has shown potential in photocatalytic applications due to its chemical stability, visible-light response, and eco-friendly composition. However, limitations such as poor charge separation and limited light absorption have hindered its …
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Photocatalytic sustainable processes for the H2 production by photoreforming of green organic substrates [Processo fotocatalitico sostenibile per la produzione di H2 dal fotoreforming di substrati organici green]
… con il nitruro di carbonio grafitico (g-C3N4), originariamente utilizzato per il fotoriforming solare di materiali plastici, tra cui il bisfenolo A (BPA) e il polietilene tereftalato (PET). Inoltre, è stata studiata l'influenza dell'aggiunta al SiC-g-C3N4 di un co- catalizzatore privo di …
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Density functional theory calculations on materials in photocatalysis
… exist in the novel graphitic carbon nitride (g-C3N4) material. In chapters 5 and 6, we focus on the conventional TiO2 material and focused on the more favoured hydrogen coupling mechanism and the electron transfer step in defected system, respectively.
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Removal of organic compounds from aquatic environments by advanced oxidation processes.
… the effectiveness of graphitic carbon nitride (g-C3N4) coated glass beads and UV-A LED irradiation for the removal of a mixture containing nine pesticides (1 mg L-1 each in artificial freshwater; acetamiprid, clothianidin, imidacloprid, thiacloprid, thiamethoxam, diuron, atrazine, dimethoate and …
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Charge transfer engineering in Phenyl-modified Carbon Nitride-based hybrid systems: from powder Photocatalysts to Thin films
… photocatalysts. Graphitic carbon nitride (g-C3N4) is a promising metal-free semiconductor due to its suitable bandgap, chemical stability, and low cost; however, its performance is limited by rapid charge carrier recombination, low mobility, and inefficient charge utilization. To overcome …
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On new allotropes and nanostructures of carbon nitrides
… The proposed crystal structure of this g-C3N4 species was derived in analogy to graphite by means of extensive powder XRD studies, indexing and refinement. It is based on sheets of hexagonally arranged s-heptazine (C6N7) units that are held together by covalent bonds between C and N atoms. …
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Understanding and controlling the reactivity of oxygen reduction and methanol oxidation electrocatalysts
… MoS2 (E1/2 = −0.15 V vs. RHE with n = 2.2) or g-C3N4 (E1/2 = −0.24 V vs. RHE with n = 3.1). Electron paramagnetic resonance (EPR), X-ray absorption fine structure (XAFS), and magnetometry measurements show the electronic structure around the Fe center is the same for all three supports. Only the …
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Designing Two-Dimensional Nanomaterials for Electrocatalytic Clean Energy Conversion
… calculations. First, a hybrid material of 2D C3N4@MoN was prepared using an interface engineering strategy. The intimate interaction of both inert C3N4 and MoN surfaces induced a highly active interface with tunable dual-active sites for alkaline HER. The enhanced activity originates from the …