Ionic liquid-assisted synthesis of porous boron-doped graphitic carbon nitride for photocatalytic hydrogen production

Qi, Kezhen; Cui, Nan; Zhang, Manjie; Ma, Yuhua; Wang, Guangzhao; Zhao, Zhen; Khataee, Alireza

doi:10.1016/j.chemosphere.2021.129953

Cited by 71 publications

(19 citation statements)

References 45 publications

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“…The light absorption properties of the samples were investigated by UV-Vis DRS ( Figure 2 ). The g-C 3 N 4 absorbs the light photons with a wavelength of 470 nm and gives a direct band gap of 2.64 eV, which is consistent with the previous report ( Ong et al, 2015 ; Qi et al, 2021 ). CuO has a narrow band gap of lower than 1.5 eV, which means a strong visible light absorption ability ( Verma et al, 2019 ).…”

Section: Resultssupporting

confidence: 92%

“…In order to show the enhanced charge separation in the fabricated CuO/g-C 3 N 4 composite, PL spectra were obtained, as shown in Figure 9. As can be observed, an emission peak of g-C 3 N 4 is located at 460 nm, which agrees with the previous results (Liu and Ma, 2020;Zhang M. et al, 2021). The intensity of PL peak is high in case of g-C 3 N 4, which shows poor charge separation.…”

Section: Photoluminescence Analysissupporting

confidence: 92%

“…Transition metal oxides are extremely promising materials for semiconductor photocatalysts (Zhang G. et al, 2021;Shan et al, 2021). Especially, CuO is very important due to its high abundance, low cost, non-toxic property, high intrinsic thermal safety, and environmental benignity.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Removal of Antibiotics on g-C3N4 Using Amorphous CuO as Cocatalysts

et al. 2021

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Amorphous CuO is considered as an excellent cocatalyst, owing to its large surface area and superior conductivity compared with its crystalline counterpart. The current work demonstrates a facile method to prepare amorphous CuO, which is grown on the surface of graphitic carbon nitride (g-C3N4) and is then applied for the photocatalytic degradation of tetracycline hydrochloride. The prepared CuO/g-C3N4 composite shows higher photocatalytic activities compared with bare g-C3N4. Efficient charge transfer between g-C3N4 and CuO is confirmed by the photocurrent response spectra and photoluminescence spectra. This work provides a facile approach to prepare low-cost composites for the photocatalytic degradation of antibiotics to safeguard the environment.

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Section: Resultssupporting

confidence: 92%

Section: Photoluminescence Analysissupporting

confidence: 92%

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Photocatalytic Removal of Antibiotics on g-C3N4 Using Amorphous CuO as Cocatalysts

et al. 2021

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“…Besides, surfactant templates should be easily and completely decomposed to avoid affecting the electrical conductivity of g -C 3 N 4 . Commonly used surfactant soft templates include nonionic surfactants (e.g., Pluronic P-123 [ 111 , 112 ], Triton X-100 [ 46 , 113 , 114 , 115 ], Pluronic F-127 [ 116 ]) and ionic liquid [ 117 , 118 , 119 ].…”

Section: Pore Modifications Over G -C 3 Nmentioning

confidence: 99%

g-C3N4: Properties, Pore Modifications, and Photocatalytic Applications

et al. 2021

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Graphitic carbon nitride (g-C3N4), as a polymeric semiconductor, is promising for ecological and economical photocatalytic applications because of its suitable electronic structures, together with the low cost, facile preparation, and metal-free feature. By modifying porous g-C3N4, its photoelectric behaviors could be facilitated with transport channels for photogenerated carriers, reactive substances, and abundant active sites for redox reactions, thus further improving photocatalytic performance. There are three types of methods to modify the pore structure of g-C3N4: hard-template method, soft-template method, and template-free method. Among them, the hard-template method may produce uniform and tunable pores, but requires toxic and environmentally hazardous chemicals to remove the template. In comparison, the soft templates could be removed at high temperatures during the preparation process without any additional steps. However, the soft-template method cannot strictly control the size and morphology of the pores, so prepared samples are not as orderly as the hard-template method. The template-free method does not involve any template, and the pore structure can be formed by designing precursors and exfoliation from bulk g-C3N4 (BCN). Without template support, there was no significant improvement in specific surface area (SSA). In this review, we first demonstrate the impact of pore structure on photoelectric performance. We then discuss pore modification methods, emphasizing comparison of their advantages and disadvantages. Each method’s changing trend and development direction is also summarized in combination with the commonly used functional modification methods. Furthermore, we introduce the application prospects of porous g-C3N4 in the subsequent studies. Overall, porous g-C3N4 as an excellent photocatalyst has a huge development space in photocatalysis in the future.

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“…It is demonstrated that this valuable strategy by coupling with wide bandgap semiconductors metal oxides (TiO 2 , ZnO, ZnS), the photocatalytic activities of narrow bandgap semiconductors metal oxides (BiVO 4 , Fe 2 O 3 , BiFeO 3, and Bi 2 O 3 ) can be greatly improved. [21][22][23] This can be attributed to the wide bandgap semiconductor metal oxides with suitable CB potential that can offer a platform-like thermodynamic level to accept the photoelectrons from g-C 3 N 4 at a high energy level before they relax into the VB bottom. It is demonstrated that enhancing charge separation through modulating photogenerated electrons and utilizing the thermodynamic high-level-energy-electron (HLEEs) via constructing an appropriate energy platform could considerably improve the activities of subject g-C 3 N 4 for organic pollutants, most importantly doxycycline (DC) deterioration under visible-light irradiation.…”

Section: Introductionmentioning

confidence: 99%

Eriobotrya japonica assisted green synthesis of g‐C₃N₄ nanocomposites and its exceptional photoactivities for doxycycline and rhodamine B degradation with mechanism insight

Khan

Wan

Chen

et al. 2021

J Chinese Chemical Soc

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In this novel research work, for the first time, green g-C 3 N 4 nanocomposites have been synthesized by utilizing Eriobotrya japonica as a stabilizer and mediator. Based on DRS absorbance spectra, TGA, fluorescence spectra related to •OH amount, photoelectrochemical curves, TPD, and BET results, it has been confirmed the Eriobotrya japonica mediated green g-C 3 N 4 (G-CNS) nanosheets are efficient, stable, and more than 2.4 times enhancement in activities as compared with conventional chemically synthesized g-C 3 N 4 nanosheets. In order to further improve the performance, the as-synthesized green g-C 3 N 4 was modified with SnO 2 nanosheets. Our results confirmed that coupling of SnO 2 nanosheets prolonged the lifetime of charge carriers and provided catalytic function. Compared with pristine G-CNS, the photocatalytic activity of the resulting 5SO/G-CNS improved by 2.3 and 2.6 times, for doxycycline and rhodamine B degradation, respectively. In addition, the possible photodegradation pathway for doxycycline and RhB mineralization is proposed. Finally, this novel work will provide a new platform for the efficient green synthesis of g-C 3 N 4 based nanocomposite and its utilization for environmental remediation.

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Ionic liquid-assisted synthesis of porous boron-doped graphitic carbon nitride for photocatalytic hydrogen production

Cited by 71 publications

References 45 publications

Photocatalytic Removal of Antibiotics on g-C3N4 Using Amorphous CuO as Cocatalysts

Photocatalytic Removal of Antibiotics on g-C3N4 Using Amorphous CuO as Cocatalysts

g-C3N4: Properties, Pore Modifications, and Photocatalytic Applications

Eriobotrya japonica assisted green synthesis of g‐C₃N₄ nanocomposites and its exceptional photoactivities for doxycycline and rhodamine B degradation with mechanism insight

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Ionic liquid-assisted synthesis of porous boron-doped graphitic carbon nitride for photocatalytic hydrogen production

Cited by 71 publications

References 45 publications

Photocatalytic Removal of Antibiotics on g-C3N4 Using Amorphous CuO as Cocatalysts

Photocatalytic Removal of Antibiotics on g-C3N4 Using Amorphous CuO as Cocatalysts

g-C3N4: Properties, Pore Modifications, and Photocatalytic Applications

Eriobotrya japonica assisted green synthesis of g‐C3N4 nanocomposites and its exceptional photoactivities for doxycycline and rhodamine B degradation with mechanism insight

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Product

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Eriobotrya japonica assisted green synthesis of g‐C₃N₄ nanocomposites and its exceptional photoactivities for doxycycline and rhodamine B degradation with mechanism insight