Vacuum heat-treatment of carbon nitride for enhancing photocatalytic hydrogen evolution

Cao, Yiqun; Zhang, Zizhong; Long, Jinlin; Liang, Jun; Lin, Huan; Wang, Xuxu

doi:10.1039/c4ta03070b

Cited by 105 publications

(56 citation statements)

References 46 publications

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“…Sharp photoelectron peaks appeared at binding energies of 932 eV (Cu 2p), 398 eV (N 1s), and 287 eV (C 1s), respectively, thereby indicating the existence of Cu, C, and N elements in the CuO‐ g ‐C 3 N 4 sample. The high resolution C1 s XPS spectra in g ‐C 3 N 4 show two sharp peaks at 284.8 eV and 287.8 eV, which could be ascribed to defect‐containing sp 2 ‐hybridized carbon atoms presented in graphitic domains and a N‐C=N coordination, respectively . The high resolution N 1s spectra for CuO‐ g ‐C 3 N 4 could be separated into three peaks at 398.3 eV, 398.9 eV, and 399.5 eV.…”

Section: Methodsmentioning

confidence: 62%

Direct Synthesis of Porous Nanorod‐Type Graphitic Carbon Nitride/CuO Composite from Cu–Melamine Supramolecular Framework towards Enhanced Photocatalytic Performance

Wang

Qian

et al. 2015

Chemistry An Asian Journal

133

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Facile and direct synthesis of porous nanorod-type graphitic carbon nitride/CuO composite (CuO-g-C3 N4 ) has been achieved by using a Cu-melamine supramolecular framework as a precursor. The CuO-g-C3 N4 nanocomposite demonstrated improved visible-light-driven photocatalytic activities. The results indicate that metal-melamine supramolecular frameworks can be promising precursors for the preparation of efficient g-C3 N4 nanocomposite photocatalysts.

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Section: Methodsmentioning

confidence: 62%

Direct Synthesis of Porous Nanorod‐Type Graphitic Carbon Nitride/CuO Composite from Cu–Melamine Supramolecular Framework towards Enhanced Photocatalytic Performance

Wang

Qian

et al. 2015

Chemistry An Asian Journal

133

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“…3. The spectrum shows the typical bands already reported in the current literature (Cao et al 2014;Wang et al 2013). In particular, the bands around 800 cm −1 and in the range 1200-1700 cm −1 can be attributed to the C=N polymeric structure .…”

Section: Resultsmentioning

confidence: 81%

g-C3N4-promoted degradation of ofloxacin antibiotic in natural waters under simulated sunlight

Sturini

Speltini

Maraschi

et al. 2016

Environ Sci Pollut Res

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This is the first report on the photodegradation of ofloxacin under simulated solar light and in actual environmental matrices in the presence of a g-CN suspension. The catalyst, prepared from the polymerization of dicyandiamide (650 °C, reaction yield 60%), was characterized by means of powder X-ray diffraction (PXRD), UV-vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), and BET surface area measurements. The experiments were carried out in a lab-scale batch reactor at concentrations in the range of micrograms/milligrams per liter. The course of the reaction was monitored by high-pressure liquid chromatography with UV-vis and fluorescence detectors. The g-CN-promoted photodegradation occurred at a rate 10 times faster than the direct photolysis and obeyed a first-order kinetics; in addition, the photodegradation kinetics of sonicated g-CN resulted to be of the same order of that caused by P25 TiO. Finally, the photochemical paths and the photoproducts have been identified and compared to those obtained by using P25 TiO. From the results of this study, it can be concluded that g-CN is a very attractive photocatalyst compared to P25 TiO in view of its ease of preparation, low cost, excellent oxidizing properties, large fraction of solar radiation absorbed, and intrinsically layered structure.

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“…In addition to interfacial engineering, nanostructural control, and doping, introducing defects in g‐C 3 N 4 , namely defect engineering, is also efficient to improve its photocatalytic activity. Such strategies including the introduction of carbon vacancies, nitrogen vacancies, dye, cyanamide defects, reducing defects, protonation, alkalinized treatment, vacuum heat‐treatment, oxygenation, amorphization and breaking of hydrogen bonds have also been investigated in recent years.…”

Section: Strategies For Modifying Carbon Nitridementioning

confidence: 99%

Strategies for Efficient Solar Water Splitting Using Carbon Nitride

Yang

Wang

et al. 2017

Chemistry An Asian Journal

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Graphitic carbon nitride (g-C 3 N 4 )-based photocatalysts are promising for photocatalytic water splitting to produce clean solar fuels due to their low cost, suitable band structure and excellent photocatalytic performance. This review focuseso nt he state-of-the-artp rogress of the strategies form odifying g-C 3 N 4 -based photocatalystst oward efficient photocatalytic water splitting. In particular, we highlight the importance of interfacial engineering and nanostructuralcontrol to facilitating charge separation and migration. Other strategies including doping and defecte ngineering are also concisely discussed. Finally,t he perspectives on the challenges and future development of g-C 3 N 4 -based photocatalysts are presented.

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Vacuum heat-treatment of carbon nitride for enhancing photocatalytic hydrogen evolution

Cited by 105 publications

References 46 publications

Direct Synthesis of Porous Nanorod‐Type Graphitic Carbon Nitride/CuO Composite from Cu–Melamine Supramolecular Framework towards Enhanced Photocatalytic Performance

Direct Synthesis of Porous Nanorod‐Type Graphitic Carbon Nitride/CuO Composite from Cu–Melamine Supramolecular Framework towards Enhanced Photocatalytic Performance

g-C3N4-promoted degradation of ofloxacin antibiotic in natural waters under simulated sunlight

Strategies for Efficient Solar Water Splitting Using Carbon Nitride

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