Synthesis high specific surface area nanotube g-C<sub>3</sub>N<sub>4</sub> with two-step condensation treatment of melamine to enhance photocatalysis properties

Jin, Zhengyuan; Zhang, Qitao; Yuán, Sàisài

doi:10.1039/c4ra13355b

Cited by 83 publications

(44 citation statements)

References 18 publications

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“…As a result of the surface area calculation, from Figure 6, we realized that the degradation efficiency improved in proportion to the surface area. This means that there will be a close relationship between the photocatalytic efficiency and the surface area, and a detailed mechanism supporting this relationship should highly be desirable for clarifying results [37,38]. Based on our experimental data, especially shown in the inset of Figure 5, the reaction constants of both nonpatterned TiO2 and PS-patterned TiO2 were calculated using the following equation by assuming the first-order kinetics.…”

Section: Resultsmentioning

confidence: 88%

Enhancement of Photocatalytic Activities with Nanosized Polystyrene Spheres Patterned Titanium Dioxide Films for Water Purification

Seo

Lee

et al. 2020

Catalysts

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For environmental applications, such as water and air purification utilizing photocatalysts, we synthesized patterned titanium dioxide (TiO2) thin films using polystyrene (PS) spheres. This was primarily done to enhance the surface area and photocatalytic activities. TiO2 thin films were deposited on silicon wafers attached to variously sized PS spheres via the spin coating method and were annealed at 600 °C. The processing step involved patterning and coating a TiO2 sol–gel. The photocatalytic performance was analyzed using an UV–visible spectrophotometer. Within 20 min, a high catalytic efficiency (98% removal) with a 20-time faster decomposition rate of the malachite green (MG) solution than that of the nonpatterned TiO2 was obtained from the patterned TiO2 with 400 nm sized PS due to the large surface area. In addition, the phenol in the water removed as much as 50% within 2 h with the same photocatalyst, which was expected to be one of the strong candidates to be applied to the next generation of photocatalysts for water purification.

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Section: Resultsmentioning

confidence: 88%

Enhancement of Photocatalytic Activities with Nanosized Polystyrene Spheres Patterned Titanium Dioxide Films for Water Purification

Seo

Lee

et al. 2020

Catalysts

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“…Jin and co-workers [ 9 ] fabricated high specific surface area nanotube g-C 3 N 4 via a simple two-step condensation method. Their findings showed 12 times higher photocatalytic activity than bulk g-C 3 N 4 under visible light due to the higher surface area, the unique morphology, and the number of defects.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Characteristics of Surface Modified Organic Semiconductor g-C3N4 Nanotubes Alloyed with Titania

et al. 2017

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The visible-light-driven photocatalytic degradation of Bisphenol A (BPA) was investigated using the binary composite of alkaline treated g-C3N4 (HT-g-C3N4) deposited over commercial TiO2 (Evonik Degussa GmbH, Essen, Germany). The existence and contribution of both TiO2 and g-C3N4/HT-g-C3N4 in the composite was confirmed through various analytical techniques including powder X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectra (UV-vis-DRS), and photoluminescence (PL) analysis. The results showed that the titania in the binary composite exhibited both pure rutile and anatase phases. The morphological analysis indicated that the spongy “morel-like” structure of g-C3N4 turned to nanotube form after alkaline hydrothermal treatment and thereby decreased the specific surface area of HT-g-C3N4. The low surface area of HT-g-C3N4 dominates its promising optical property and effective charge transfer, resulting in a deprived degradation efficiency of BPA two times lower than pure g-C3N4. The binary composite of HT-g-C3N4/TiO2 exhibited excellent degradation efficiency of BPA with 2.16 times higher than the pure HT-g-C3N4. The enhanced photocatalytic activity was mainly due to the promising optical band gap structure with heterojunction interface, favorable specific surface area, and good charge separation.

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“…Two broad peaks at 2q around 22 and 43 for the GR/AC hybrids are characteristic peaks of carbon-based materials, 28 which are in good agreement with the (002) and (101) crystal planes, respectively. 29 Three broad peaks at 12 , 37 , 55 and 66 appeared for the GAM hybrids, which could be indexed to the birnessite-type MnO 2 . Furthermore, the peak at 2q around 43 of the carbon-based materials disappeared aer the deposition of MnO 2 .…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal fabrication of reduced graphene oxide/activated carbon/MnO₂ hybrids with excellent electrochemical performance for supercapacitors

Gao

et al. 2017

RSC Adv.

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A graphene/activated carbon/MnO 2 (GAM) composite was synthesized by reacting in a hydrothermal synthesis reactor and maintaining at 140 C for 2 h. MnO 2 anchored on graphene/activated carbon (GR/ AC) sheets and the activated carbon (AC) particles distributed on the graphene (GR) surface provided numerous meso/micropores that act as active sites for the discharge reaction. The GR forms a threedimensional network with excellent electrical conductivity for application. In this study, we focus on the mass ratio of GR/AC and MnO 2 . The test outcome indicated that the GAM electrodes displayed exceptionable electrochemical performances especially when the mass ratio of GR/AC and MnO 2 is 2 : 3. The specific capacitance of GAM has achieved 378 F g À1 at a constant current density of 50 mA g À1 in the 7 M KOH electrolytic solution. Beyond that, the GAM 2 : 3 electrodes have also shown splendid cyclic ability with a 91.58% capacitance retention over 3000 circles. The three dimensional network structure is expected to represent a thrilling orientation for heightening the electrochemical property of MnO 2 and could be generalized for projecting next-generation superior supercapacitors.

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Synthesis high specific surface area nanotube g-C₃N₄ with two-step condensation treatment of melamine to enhance photocatalysis properties

Abstract: High specific surface area nanotube g-C3N4 was fabricated by a simple two-step condensation method.

Cited by 83 publications

References 18 publications

Enhancement of Photocatalytic Activities with Nanosized Polystyrene Spheres Patterned Titanium Dioxide Films for Water Purification

Enhancement of Photocatalytic Activities with Nanosized Polystyrene Spheres Patterned Titanium Dioxide Films for Water Purification

Mechanistic Characteristics of Surface Modified Organic Semiconductor g-C3N4 Nanotubes Alloyed with Titania

Hydrothermal fabrication of reduced graphene oxide/activated carbon/MnO₂ hybrids with excellent electrochemical performance for supercapacitors

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Synthesis high specific surface area nanotube g-C3N4 with two-step condensation treatment of melamine to enhance photocatalysis properties

Abstract: High specific surface area nanotube g-C3N4 was fabricated by a simple two-step condensation method.

Cited by 83 publications

References 18 publications

Enhancement of Photocatalytic Activities with Nanosized Polystyrene Spheres Patterned Titanium Dioxide Films for Water Purification

Enhancement of Photocatalytic Activities with Nanosized Polystyrene Spheres Patterned Titanium Dioxide Films for Water Purification

Mechanistic Characteristics of Surface Modified Organic Semiconductor g-C3N4 Nanotubes Alloyed with Titania

Hydrothermal fabrication of reduced graphene oxide/activated carbon/MnO2 hybrids with excellent electrochemical performance for supercapacitors

Contact Info

Product

Resources

About

Synthesis high specific surface area nanotube g-C₃N₄ with two-step condensation treatment of melamine to enhance photocatalysis properties

Hydrothermal fabrication of reduced graphene oxide/activated carbon/MnO₂ hybrids with excellent electrochemical performance for supercapacitors