Effects of calcining temperature on photocatalysis of g-C 3 N 4 /TiO 2  composites for hydrogen evolution from water

Qu, Ailan; Xu, Xinmei; Xie, Haolong; Zhang, Yangyu; Li, Yuyu; Wang, Junxian

doi:10.1016/j.materresbull.2016.03.043

Cited by 63 publications

(8 citation statements)

References 58 publications

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“…The research on this unique material is still developing because of its prospective applications, especially in photocatalysis and catalysis, which are described in detail in recent reviews. − Graphitic carbon nitride is a semiconductor with the band gap of 2.7 eV . The incorporation of alkali metals ions into the structure of graphitic carbon nitride has been reported in a few papers only. − The doped graphitic carbon nitride has, in comparison to undoped g-C 3 N 4 , improved visible light absorption performance, increased hygroscopicity, or enhanced photocatalyst properties. , Moreover, g-C 3 N 4 is used to obtain composites with other semiconductors − or magnetic NPs. , …”

Section: Introductionmentioning

confidence: 99%

Extraordinary Adsorption of Methyl Blue onto Sodium-Doped Graphitic Carbon Nitride

et al. 2017

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Herein, the adsorption performance of sodium-doped graphitic carbon nitride in relation to the removal of methyl blue is investigated. The adsorbent was synthesized via the direct thermal polycondensation of cyanamide in the presence of sodium chloride. The inclusion of sodium in graphitic carbon nitride resulted in a substantial improvement of its adsorption capacity and adsorption kinetics. The maximum capacity for methyl blue was at least 8 times higher in comparison to commercial activated carbon and even 36 times higher than in the case of undoped material. The obtained adsorbents had very low porosity, and the resultant high adsorption capacities, as determined from the experiments, pointed to the extraordinary adsorption. Moreover, the equilibrium of the adsorption process was reached at the contact time less than 5 min. The obtained adsorbent was thoroughly investigated by means of various physical and chemical analyses. Additionally, the regeneration studies of the spent adsorbents were carried out.

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Section: Introductionmentioning

confidence: 99%

Extraordinary Adsorption of Methyl Blue onto Sodium-Doped Graphitic Carbon Nitride

et al. 2017

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“…Figure displays that FT and P25 exhibited very weak visible-light-induced photocatalytic activity, because of their absorption mostly in the UV region. Conversely, the FTCN nanocomposite showed superior catalytic activity because of its influential visible-light absorption capability . Remarkably, all of the FTCN photocatalysts exhibited better catalytic activity than pure FT and P25.…”

Section: Resultsmentioning

confidence: 95%

“…The photocatalytic degradation followed a pseudo-first-order reaction, while the maximum degradation rate was found for FTCN-3 (Table ). This enhancement in the photodegradation activity could be attributed to the following obvious reasons: (1) Interfacial connection between g-C 3 N 4 nanosheets and TiO 2 nanospheres, − (2) the large specific surface area (339 m 2 g –1 ) and foamy structure that provide sufficient contact with dyes, and (3) the better light absorption efficiency played a vital role in photodegradation. , The light-transfer pathway is produced by the cavities that induced the incident photons to the inner surfaces of the catalyst, which allowed light irradiation to go deep inside the catalyst and excite the electron more efficiently. Moreover, the internal cavities could act as light dispersion centers, which made it more efficient to absorb light …”

Section: Resultsmentioning

confidence: 99%

In Situ Fabrication of Foamed Titania Carbon Nitride Nanocomposite and Its Synergetic Visible-Light Photocatalytic Performance

Shakeel

Yasin

et al. 2018

Ind. Eng. Chem. Res.

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Efficient visible-light-driven materials are key for environmental remediation. The foamed titania–carbon nitride nanocomposite (FTCN) was synthesized by in situ microemulsification followed by calcination using bulk g-C3N4 and TBOT. During calcination the bulk g-C3N4 transformed into ultrathin nanosheets. The nanocomposite is characterize by state of the art physicochemical techniques; the structure look like foam with mesoporous cavities. The carbon nitride nanosheets were uniformly distributed and mostly embedded inside the bulk of titania with close interfacial connection. The FTCN-3 nanocomposite has superior degradation performance for MB and RhB with rate constants of 0.096 and 0.061 (min–1), respectively. This upmost photocatalytic activity could be ascribed to large S BET (339 m2 g–1) and foamed structure. These are considered significant factors for efficient visible-light absorption and slow recombination of charges during photocatalysis. This is an inventive strategy to enhance the potential of TiO2 in diverse fields.

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“…With this, secondary modification of materials with different dimensions of g-C 3 N 4 and doping elements will have great potential. Nevertheless, the preparation of materials cannot be perfect due to the absence of N, C and cyanogroup, which is also called defect engineering, but this will provide opportunities for the improvement of optical properties of g-C 3 N 4 [30,31].…”

Section: Modification Pathways For G-c Nmentioning

confidence: 99%

g-C3N4 Derived Materials for Photocatalytic Hydrogen Production: A Mini Review on Design Strategies

Su¹,

Deng²,

Li³

et al. 2022

Journal of Renewable Materials

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Hydrogen production through solar energy is one of the most important pathways to meet the growing demand of renewable energy, and photocatalyst participation in solar hydrolytic hydrogen production has received great attention in recent years in terms of low cost, high efficiency, and flexible design. Particularly, g-C 3 N 4 (Graphiticlike carbon nitride material), as a unique material, can catalyze the hydrogen production process by completing the separation and transmission of charge. The easily adjustable pore structure/surface area, dimension, band-gap modulation and defect have shown great potential for hydrogen production from water cracking. In this review, the most recent advance of g-C 3 N 4 including the doping of metal and non-metal elements, and the formation of semiconductor heterojunction is highlighted. The main modification strategies and approaches for the design of g-C 3 N 4 for hydrogen production, as well as the influence of various materials on hydrogen evolution regarding the photocatalysis mechanism and advantages brought by theoretical calculations are specially and briefly illustrated. Potential design pathways and strategies of g-C 3 N 4 are discussed. In addition, current challenges of hydrogen production from g-C 3 N 4 water splitting are summarized and can be expected.

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Effects of calcining temperature on photocatalysis of g-C 3 N 4 /TiO 2 composites for hydrogen evolution from water

Cited by 63 publications

References 58 publications

Extraordinary Adsorption of Methyl Blue onto Sodium-Doped Graphitic Carbon Nitride

Extraordinary Adsorption of Methyl Blue onto Sodium-Doped Graphitic Carbon Nitride

In Situ Fabrication of Foamed Titania Carbon Nitride Nanocomposite and Its Synergetic Visible-Light Photocatalytic Performance

g-C3N4 Derived Materials for Photocatalytic Hydrogen Production: A Mini Review on Design Strategies

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