Surface hydroxylation of graphitic carbon nitride: Enhanced visible light photocatalytic activity

Zheng, Yuanyi; Zhang, Zisheng; Li, Chun Hu; Proulx, Scott

doi:10.1016/j.materresbull.2016.07.003

Cited by 46 publications

(15 citation statements)

References 66 publications

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“…Oxygen plasma can be employed for introducing protonated hydroxylamine functional groups to g-C 3 N 4 surface, which provides extreme hydrophilic character. 79 Other functional groups such as sulfonic acid, 80 hydroxyl 81 or aromatic groups 48 can also be introduced for enhancing dispersibility of g-C 3 N 4 sheets. However, alternative facile and less stringent routes to enhance dispersibility with high g-C 3 N 4 solid content yields would be beneficial.…”

Section: Carbon Nitride Dispersibilitymentioning

confidence: 99%

Graphitic carbon nitride and polymers: a mutual combination for advanced properties

et al. 2020

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Section: Carbon Nitride Dispersibilitymentioning

confidence: 99%

Graphitic carbon nitride and polymers: a mutual combination for advanced properties

et al. 2020

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“…A particular example was the use of H 2 O 2 (a mild oxidizer) to generate hydroxyl groups on the surface. [ 38 ] In general, strong oxidizers can create defects in the g‐C 3 N 4 structure. A particular example was the use of H 2 O 2 (a mild oxidizer) to generate hydroxyl groups on the surface.…”

Section: Characterization Methodsmentioning

confidence: 99%

“…A particular example was the use of H 2 O 2 (a mild oxidizer) to generate hydroxyl groups on the surface. [ 38 ] As a result of hydroxylation, the characteristic (0 0 2) peak at ≈27.2° shifted to higher 2 θ values and the intensity of the peak increased. The observed shift and peak enhancement were dependent on the concentration of H 2 O 2 (0, 10, 20 and 30 wt%) (Figure 4b).…”

Section: Characterization Methodsmentioning

confidence: 99%

“…In another study, oxidation of the g‐C 3 N 4 using H 2 O 2 was found to be effective to create oxygen‐containing functional groups on the surface and the functionalized material showed enhanced activity for rhodamine B degradation. [ 38 ] In addition to the use of strong oxidizers to create oxygen‐containing moieties on the g‐C 3 N 4 surface, a bottom‐up approach which uses a novel nitrogen‐rich precursor bearing hydrochloride groups, so‐called semicarbazide hydrochloride (ONLH), was shown to increase the amount of oxidized content in the structure of g‐C 3 N 4 . [ 63 ] The oxygen concentration was controlled thermally by carrying out the synthesis at different temperatures.…”

Section: Surface Functionalization Of G‐c3n4mentioning

confidence: 99%

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Functionalized Graphitic Carbon Nitrides for Environmental and Sensing Applications

Fidan

Torabfam

Saleem

et al. 2021

Adv Energy and Sustain Res

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Graphitic carbon nitride (g‐C3N4) is a metal‐free semiconductor that has been widely regarded as a promising candidate for sustainable energy production or storage. In recent years, g‐C3N4 has become the center of attention by virtue of its impressive properties, such as being inexpensive, easily fabricable, nontoxic, highly stable, and environment friendly. Herein, the recent research developments related to g‐C3N4 are outlined, which sheds light on its future prospective. Various synthetic methods and their impact on the properties of g‐C3N4 are detailed, along with discussion on frequently used characterization methods. Different approaches for g‐C3N4 surface functionalization, mainly categorized under covalent and noncovalent strategies, are outlined. Moreover, the processing methods of g‐C3N4, such as g‐C3N4‐based thin films, hierarchical, and hybrid structures, are explored. Next, compared with the extensively studied energy‐related applications of the modified g‐C3N4s, relatively less‐examined areas, such as environmental and sensing, are presented. By highlighting the strong potential of these materials and the existing research gaps, new researchers are encouraged to produce functional g‐C3N4‐based materials using diverse surface modification and processing routes.

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“…Hydroxyl functional groups may be potential candidates in improving the hydrophilicity of C 3 N 4 [3]. Our group had reported on the surface modification of C 3 N 4 with hydroxyls using hydrogen peroxide (H 2 O 2 ), and found that the photocatalytic activity of C 3 N 4 was promoted [4]. Additionally, as reported by Li et al, that the photocatalytic activity of C 3 N 4 treated in an ammonia solution was improved due to the hydroxyl surface modification [5].…”

Section: Introductionmentioning

confidence: 99%

An Effective Approach to Improve the Photocatalytic Activity of Graphitic Carbon Nitride via Hydroxyl Surface Modification

Meng

Zhang

2018

Catalysts

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In this work, we have developed a hydrothermal method to modify g-C3N4 with hydroxyl surface modification. Modified g-C3N4 has exhibited higher photocatalytic activity in the removal of phenolic compounds under visible light. The improvement may be due to the following merits: (1) Tuning of the hydrophobic surface of g-C3N4 to be hydrophilic; (2) improved adsorption energy, and (3) narrowed band gap for g-C3N4 after hydroxyl surface modification. This method is easy-to-operate, very effective in adding hydroxyl groups on the surface of C3N4, and may be extended to other systems to promote their photocatalytic activities in water treatment.

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Surface hydroxylation of graphitic carbon nitride: Enhanced visible light photocatalytic activity

Cited by 46 publications

References 66 publications

Graphitic carbon nitride and polymers: a mutual combination for advanced properties

Graphitic carbon nitride and polymers: a mutual combination for advanced properties

Functionalized Graphitic Carbon Nitrides for Environmental and Sensing Applications

An Effective Approach to Improve the Photocatalytic Activity of Graphitic Carbon Nitride via Hydroxyl Surface Modification

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