Ball-flower like NiO/g-C3N4 heterojunction for efficient visible light photocatalytic CO2 reduction

Tang, Junying; Guo, Rui‐tang; Zhang, Weiguo; Huang, Chun‐Ying; Pan, Weiguo

doi:10.1016/j.apcatb.2018.06.042

Cited by 278 publications

(81 citation statements)

References 69 publications

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“…The Fermi level of an n-type semiconductor lies just below the conduction band, while for a p-type semiconductor it lies just above the valence band. 37,38 Consequently, the Fermi level (at-band potential) of a p-type catalyst is close to the VB while that of an n-type sample is located near the CB, which was also demonstrated for porous few-layer carbon nitride by Xiao et al 36 and a NiO/g-C 3 N 4 heterojunction by Tang et al 39 Therefore, the potentials of the VB of MAPbBr 3 are calculated to be $1.1 eV by subtracting the optical band gap (2.13 eV) from the CBM, which is in reasonably good agreement with those reported by Li et al 33 and Samu et al 34 Additionally, the at-band potential of p-g-C 3 N 4 -Sol was measured to be À1.34 V versus Ag/AgCl, which is similar to the value of ultrathin g-C 3 N 4 (À1.32 V vs. Ag/AgCl) 36 and slightly smaller than the value (À1.43 V) reported by Wang et al So, the potentials of the VB of p-g-C 3 N 4 are calculated to be $1.4 eV by subtracting the optical band gap (2.7 eV) 16,20 from the CB, which is slight bigger than that of MAPbBr 3 (1.1 eV).…”

Section: Electrochemical Analysis Of Mapbbr 3 /P-g-c 3 Nmentioning

confidence: 67%

“…Consequently, the space charge region called the internal electric eld in p-n heterojunctions is established when the electrons and holes accumulate until reaching an equilibrium, which could acts as a potential barrier to decrease the electron-hole pair recombination. 39 Based on the Mott-Schottky (MS) analysis, the corresponding inverted type-I band conguration structure alignments of MAPbBr 3 and p-g-C 3 N 4 are schematically depicted in Fig. 10.…”

Section: Electrochemical Analysis Of Mapbbr 3 /P-g-c 3 Nmentioning

confidence: 99%

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Isopropanol-assisted synthesis of highly stable MAPbBr₃/p-g-C₃N₄ intergrowth composite photocatalysts and their interfacial charge carrier dynamics

Wang

Qin

et al. 2020

Nanoscale Adv.

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Two phase photocatalysts can be intergrown with each other, resulting in superior photocatalytic properties. Herein, methylamine lead bromide (MAPbBr 3 ) wrapped/entrapped protonated graphitic carbon nitride (p-g-C 3 N 4 ) intergrowth microcrystals were fabricated by mixing a pervoskite precursor with p-g-C 3 N 4 colloidal sol. A highly stable isopropanol (IPA) solvent based photocatalytic system for dye degradation was demonstrated. The composite with an optimal p-g-C 3 N 4 mass percentage of 3.3 wt% (denoted as MAPbBr 3 /p-g-C 3 N 4 -1.0 mg) exhibited the highest photocatalytic degradation of malachite green (99.8%) within 10 min under visible light, which was 5.3-fold and 16-fold greater than that exhibited by its constituents separately. The strong chemical interaction and fundamental photophysical processes in MAPbBr 3 /p-g-C 3 N 4 were systematically evaluated by spectroscopic and electrochemical techniques, confirming the effective separation of photogenerated electron-hole pairs and faster interfacial charge transfer behavior. Furthermore, active superoxide radicals (O 2 c À ) played a vital role in the catalytic reaction, because of the significant photoinduced electron transfer rate (k et ) in the inverted type-I core/shell MAPbBr 3 /p-g-C 3 N 4 band configuration structure. In addition, MAPbBr 3 /p-g-C 3 N 4 has good cycling stability for 10 cycles and versatility for other cationic (RhB) and anionic (MO) dye pollutants, indicating the great potential for solar energy conversion into chemical energy.

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Section: Electrochemical Analysis Of Mapbbr 3 /P-g-c 3 Nmentioning

confidence: 67%

Section: Electrochemical Analysis Of Mapbbr 3 /P-g-c 3 Nmentioning

confidence: 99%

Isopropanol-assisted synthesis of highly stable MAPbBr₃/p-g-C₃N₄ intergrowth composite photocatalysts and their interfacial charge carrier dynamics

Wang

Qin

et al. 2020

Nanoscale Adv.

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“…The C 1s peak from pure NiO is due to the adventitious carbon. 33 The presence of a peak of N 1s in the spectrum of the Ni/CN-10 composite means that g-C 3 N 4 is successfully incorporated into NiO. The corresponding high-resolution (HR) spectra of C 1s, N 1s, O 1s, and Ni 2p are also shown in Figure 2, respectively.…”

Section: Resultsmentioning

confidence: 93%

Graphitic Carbon Nitride Nanosheets Decorated Flower-like NiO Composites for High-Performance Triethylamine Detection

Wang

Tian

et al. 2019

ACS Omega

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The graphitic carbon nitride (g-C 3 N 4 ) nanosheets decorated three-dimensional hierarchical flower-like nickel oxide (NiO) composites (NiO/g-C 3 N 4 , Ni/CN) were synthesized via a facile hydrothermal method combined with a subsequent annealing process. The structure and morphology of the as-prepared Ni/CN composites were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen absorption. The gas-sensing experiments reveal that the composites with 10 wt % two-dimensional g-C 3 N 4 (Ni/CN-10) not only exhibits the highest response of 20.03 that is almost 3 times higher than pristine NiO to 500 ppm triethylamine (TEA) at the optimal operating temperature of 280 °C but also shows a good selectivity toward TEA. The gas-sensitivity promotion mechanism is attributed to the internal charge transfer within the p–n heterojunction. Furthermore, the high specific surface area of the Ni/CN composites promotes adequate contact and reaction between the composites and triethylamine molecules. Therefore, the Ni/CN sensor has a great potential application in detecting TEA.

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“…Based on the following formula, the unit of V fb was converted from V vs Ag/AgCl to the normal hydrogen electrode (NHE) potential. 42 …”

Section: Resultsmentioning

confidence: 99%

Improved in Situ Synthesis of Heterostructured 2D/2D BiOCl/g-C₃N₄ with Enhanced Dye Photodegradation under Visible-Light Illumination

et al. 2019

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A simple, in situ, and one-pot hydrothermal strategy was applied for the successful manufacturing of heterostructured 2D/2D BiOCl/g-C3N4 photocatalysts, and outstanding photodegradation of Rhodamine B in the condition of visible-light irradiation over the composites emerged. The investigation of various BiOCl/g-C3N4 ratios influencing the activity implied that the optimized B2C1 (mole ratio of BiOCl/g-C3N4 with 2:1) exhibited the higher degradation efficiency than that of the rest of the composites, even higher than that of pure BiOCl and pure g-C3N4, which yielded over 90% in the initial 30 min and reached almost 100% during the whole 70 min irradiation process. Kinds of characterizations demonstrated that the enhancement of photodegradation performance was caused by the intimate contact between BiOCl and g-C3N4 to form the heterostructure, which could benefit the generation of abundant visible-light photoinduced carriers and help enhance their separation and then promote their transportation to the surface.

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Ball-flower like NiO/g-C3N4 heterojunction for efficient visible light photocatalytic CO2 reduction

Cited by 278 publications

References 69 publications

Isopropanol-assisted synthesis of highly stable MAPbBr₃/p-g-C₃N₄ intergrowth composite photocatalysts and their interfacial charge carrier dynamics

Isopropanol-assisted synthesis of highly stable MAPbBr₃/p-g-C₃N₄ intergrowth composite photocatalysts and their interfacial charge carrier dynamics

Graphitic Carbon Nitride Nanosheets Decorated Flower-like NiO Composites for High-Performance Triethylamine Detection

Improved in Situ Synthesis of Heterostructured 2D/2D BiOCl/g-C₃N₄ with Enhanced Dye Photodegradation under Visible-Light Illumination

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Ball-flower like NiO/g-C3N4 heterojunction for efficient visible light photocatalytic CO2 reduction

Cited by 278 publications

References 69 publications

Isopropanol-assisted synthesis of highly stable MAPbBr3/p-g-C3N4 intergrowth composite photocatalysts and their interfacial charge carrier dynamics

Isopropanol-assisted synthesis of highly stable MAPbBr3/p-g-C3N4 intergrowth composite photocatalysts and their interfacial charge carrier dynamics

Graphitic Carbon Nitride Nanosheets Decorated Flower-like NiO Composites for High-Performance Triethylamine Detection

Improved in Situ Synthesis of Heterostructured 2D/2D BiOCl/g-C3N4 with Enhanced Dye Photodegradation under Visible-Light Illumination

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Product

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Isopropanol-assisted synthesis of highly stable MAPbBr₃/p-g-C₃N₄ intergrowth composite photocatalysts and their interfacial charge carrier dynamics

Isopropanol-assisted synthesis of highly stable MAPbBr₃/p-g-C₃N₄ intergrowth composite photocatalysts and their interfacial charge carrier dynamics

Improved in Situ Synthesis of Heterostructured 2D/2D BiOCl/g-C₃N₄ with Enhanced Dye Photodegradation under Visible-Light Illumination