g-C3N4 Modified by meso-Tetrahydroxyphenylchlorin for Photocatalytic Hydrogen Evolution Under Visible/Near-Infrared Light

Liu, Yanfei; Ma, Zhen

doi:10.3389/fchem.2020.605343

Cited by 12 publications

(12 citation statements)

References 110 publications

(114 reference statements)

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“…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: Resultssupporting

confidence: 93%

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: 93%

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

et al. 2021

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“…The catalysts with and without Pt were systematically tested and characterized to understand the role of D149 and Pt. Previous studies using Pt as a cocatalyst demonstrated the presence of Pt particles on g-C 3 N 4 by using TEM and EDX mapping [31,[40][41][42]. The presence of Pt particles was found to enhance the absorption of visible light and photocatalytic activity [31,[40][41][42].…”

Section: Introductionmentioning

confidence: 93%

“…For a dyesensitized photocatalyst, the dye molecules adsorbed on the surface of a semiconductor can be excited after absorbing visible light, thus injecting electrons into the conduction band of the semiconductor. MK2/TiO 2 [33], Eosin Y/TiO 2 [34], N749/rGO [35], GS12/TiO 2 [36], PY-1/g-C 3 N 4 [37], PY-2/g-C 3 N 4 [37], ZnPy/g-C 3 N 4 [38], chlorin e6/g-C 3 N 4 [39], protoporphyrin/g-C 3 N 4 [40], mTHPC/g-C 3 N 4 [41], Ppa/g-C 3 N 4 [42], N3/g-C 3 N 4 [31], and N719/g-C 3 N 4 [31] exhibited enhanced performance in H 2 evolution. How-Processes 2021, 9, 1055 2 of 15 ever, more studies are needed to enrich the family of dye-sensitized g-C 3 N 4 , to find more efficient catalysts for water splitting, and to understanding fundamental aspects of these photocatalytic systems.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies using Pt as a cocatalyst demonstrated the presence of Pt particles on g-C 3 N 4 by using TEM and EDX mapping [31,[40][41][42]. The presence of Pt particles was found to enhance the absorption of visible light and photocatalytic activity [31,[40][41][42]. However, the effect of Pt particles on transient photocurrent density, electronic impedance, and photoluminescence properties of the catalysts have not often been studied.…”

Section: Introductionmentioning

confidence: 99%

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g-C3N4 Sensitized by an Indoline Dye for Photocatalytic H2 Evolution

Chen

Liu

2021

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Protonated g-C3N4 (pCN) formed by treating bulk g-C3N4 with an aqueous HCl solution was modified with D149 dye, i.e., 5-[[4[4-(2,2-diphenylethenyl) phenyl]-1,2,3,3a,4,8b-hexahydrocyclopent[b]indol-7-yl] methylene]-2-(3-ethyl-4-oxo-2-thioxo-5-thiazolidinylidene)-4-oxo-thiazolidin-2-ylidenerhodanine, for photocatalytic water splitting (using Pt as a co-catalyst). The D149/pCN-Pt composite showed a much higher rate (2138.2 µmol·h−1·g−1) of H2 production than pCN-Pt (657.0 µmol·h−1·g−1). Through relevant characterization, the significantly high activity of D149/pCN-Pt was linked to improved absorption of visible light, accelerated electron transfer, and more efficient separation of charge carriers. The presence of both D149 and Pt was found to be important for these factors. A mechanism was proposed.

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“…In this work, we report a π -conjugated heptazine derivative, 2,5,8-tris(2,4-difluorophenyl)-1,3,4,6,7,9,9b-heptaazaphenalene (HAP-3DF), which exhibits enhanced EL by exploiting n→ π * transitions and exciplex-based TADF, respectively. On the basis of the planar and comparatively rigid heterocyclic system with six C=N bonds surrounding a sp 2 -hybridized N atom of the heptazine core, heptazine derivatives have aroused widespread attention over the past decade by virtue of charming optical, photocatalytic as well as electronic properties in the fields of hydrogen evolution, organic optoelectronic technologies and so forth ( Ge et al, 2013 ; Li et al, 2013 ; Ou et al, 2017 ; Liu and Ma, 2020 ). Considering the strong electron-accepting ability of HAP-3DF, bis(2-(diphenylphosphino)phenyl) ether oxide (DPEPO) with two electron-accepting diphenylphosphine oxide groups was chosen as the host material.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electroluminescence Based on a π-Conjugated Heptazine Derivative by Exploiting Thermally Activated Delayed Fluorescence

Gong

Zhang

et al. 2021

Front. Chem.

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Heptazine derivatives have attracted much attention over the past decade by virtue of intriguing optical, photocatalytic as well as electronic properties in the fields of hydrogen evolution, organic optoelectronic technologies and so forth. Here, we report a simple π-conjugated heptazine derivative (HAP-3DF) possessing an n→π* transition character which exhibits enhanced electroluminescence by exploiting thermally activated delayed fluorescence (TADF). Green-emitting HAP-3DF shows relatively low photoluminescence quantum efficiencies (Φp) of 0.08 in toluene and 0.16 in doped film with bis(2-(diphenylphosphino)phenyl) ether oxide (DPEPO) as the matrix. Interestingly, the organic light-emitting diode (OLED) incorporating 8 wt% HAP-3DF:DPEPO as an emitting layer achieved a high external quantum efficiency (EQE) of 3.0% in view of the fairly low Φp of 0.16, indicating the presence of TADF stemming from n→π* transitions. As the matrix changing from DPEPO to 1,3-di (9H-carbazol-9-yl)benzene (mCP), a much higher Φp of 0.56 was found in doped film accompanying yellow emission. More importantly, enhanced electroluminescence was observed from the OLED containing 8 wt% HAP-3DF:mCP as an emitting layer, and a rather high EQE of 10.8% along with a low roll-off was realized, which should be ascribed to the TADF process deriving from exciplex formation.

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g-C3N4 Modified by meso-Tetrahydroxyphenylchlorin for Photocatalytic Hydrogen Evolution Under Visible/Near-Infrared Light

Cited by 12 publications

References 110 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 Sensitized by an Indoline Dye for Photocatalytic H2 Evolution

Enhanced Electroluminescence Based on a π-Conjugated Heptazine Derivative by Exploiting Thermally Activated Delayed Fluorescence

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