Drastic promoting the visible photoreactivity of layered carbon nitride by polymerization of dicyandiamide at high pressure

Cheng, Jinshui; Zhao, Huahua; Lv, Kangle; Wu, Xiaofeng; Li, Qin; Li, Yuhan; Li, Xiaofang; Sun, Jie

doi:10.1016/j.apcatb.2018.03.066

Cited by 147 publications

(50 citation statements)

References 37 publications

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“…Besides, an IR band at 2360 cm −1 is assigned to physically adsorbed CO 2 from the atmosphere. 45,46 After plasma treatment, the intensity of the three peaks of Ti 3 C 2 T x MXene greatly weakened, which suggests reduction of surface -OH functional groups. Figure 1C carbon.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and photocatalytic H₂‐production activity of plasma‐treated Ti₃C₂T_x MXene modified graphitic carbon nitride

Zhang

Liao

et al. 2019

J Am Ceram Soc

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Plasma processing technology, as a promising method to enhance photocatalytic activity of catalyst, is gradually attracting extensive interest from researchers. However, the main mechanism of plasma‐treated photocatalyst on hydrogen production is not clear. In this work, 2D Ti3C2Tx MXene is selected as a co‐catalyst of graphitic carbon nitride (g‐C3N4), which carries out a plasma treatment (500°C) under N2/H2 atmosphere. Due to plasma treatment, there is a higher proportion Ti–O functional groups on surface of layered Ti3C2Tx MXene, especially for Ti4+. The obtained g‐C3N4/p‐Ti3C2Tx photocatalyst with sandwich‐like structure shows an enhanced photocatalytic activity. The rate of hydrogen generation of CN/pTC3.0 sample without Pt co‐catalyst is 25.4 and 2.4 times that of pure g‐C3N4 and CN/TC3.0 samples, respectively. The improved photocatalytic activity is attributed to presence of Ti4+ due to plasma treatment, which can capture photo‐induced electron from g‐C3N4 and improve the separation of electrons and holes after visible light irradiation. The cyclic hydrogen production of the photocatalyst demonstrates good photocatalytic stability. In addition, this method of plasma treatment under N2/H2 atmosphere is feasible to develop a high‐performance co‐catalyst, which can be extended to other photocatalysts with two‐dimensional structure for photocatalytic water‐splitting applications.

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Section: Resultsmentioning

confidence: 99%

Synthesis and photocatalytic H₂‐production activity of plasma‐treated Ti₃C₂T_x MXene modified graphitic carbon nitride

Zhang

Liao

et al. 2019

J Am Ceram Soc

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“…14,15 The application of g-C 3 N 4 as a photoactive material has also been investigated for various reactions, including oxygen reduction, chemical sensors, humidity sensors, transesterication, photovoltaic solar cells, water splitting, catalysis of organic synthesis reactions, CO 2 activation, photodegradation of dyes, etc. 13,[16][17][18][19][20][21] However, its effectiveness in visible light is quite low, attributing to inadequate surface area and hindered marginal absorption of light. 22,23 In order to improve its efficiency under visible light various modi-cation ideologies have been implied to alter its electronic structure, such as doping with noble metals (Au, Ag, Cu, Pt, Sm) and non-metals (N, S, P), tailoring laminar structure of g-C 3 N 4 , metallic oxide composting, copolymerization and dye sensitization.…”

Section: Introductionmentioning

confidence: 99%

Effect of calcination temperature, pH and catalyst loading on photodegradation efficiency of urea derived graphitic carbon nitride towards methylene blue dye solution

et al. 2019

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“…Semiconductor photocatalysis has attracted much attention due to its potential applications such as water (Regmi et al, 2018 ; Xu et al, 2018 ) and air purification (Wen et al, 2015 ; Cui et al, 2017 ; Li et al, 2017a ; Qi et al, 2017 ) and water splitting for clean H 2 energy (Cheng et al, 2018 ) due to its peculiar chemical and physical properties. As a typical semiconductor photocatalyst, anatase TiO 2 (A-TiO 2 ) usually shows excellent photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Oxidation of Acetone Over High Thermally Stable TiO2 Nanosheets With Exposed (001) Facets

Shi

Duan

et al. 2018

Front. Chem.

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Anatase TiO2 (A-TiO2) usually exhibits superior photocatalytic activity than rutile TiO2 (R-TiO2). However, the phase transformation from A-TiO2 to R-TiO2 will inevitably happens when the calcination temperature is up to 600°C, which hampers the practical applications of TiO2 photocatalysis in hyperthermal situations. In this paper, high energy faceted TiO2 nanosheets (TiO2-NSs) with super thermal stability was prepared by calcination of TiOF2 cubes. With increase in the calcination temperature from 300 to 600°C, TiOF2 transforms into TiO2 hollow nanoboxes (TiO2-HNBs) assembly from TiO2-NSs via Ostwald Rippening process. Almost all of the TiO2-HNBs are disassembled into discrete TiO2-NSs when calcination temperature is higher than 700°C. Phase transformation from A-TiO2 to R-TiO2 begins at 1000°C. Only when the calcination temperature is higher than 1200°C can all the TiO2-NSs transforms into R-TiO2. The 500°C-calcined sample (T500) exhibits the highest photoreactivity toward acetone oxidation possibly because of the production of high energy TiO2-NSs with exposed high energy (001) facets and the surface adsorbed fluorine. Surface oxygen vacancy, due to the heat-induced removal of surface adsorbed fluoride ions, is responsible for the high thermal stability of TiO2-NSs which are prepared by calcination of TiOF2 cubes.

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Drastic promoting the visible photoreactivity of layered carbon nitride by polymerization of dicyandiamide at high pressure

Cited by 147 publications

References 37 publications

Synthesis and photocatalytic H₂‐production activity of plasma‐treated Ti₃C₂T_x MXene modified graphitic carbon nitride

Synthesis and photocatalytic H₂‐production activity of plasma‐treated Ti₃C₂T_x MXene modified graphitic carbon nitride

Effect of calcination temperature, pH and catalyst loading on photodegradation efficiency of urea derived graphitic carbon nitride towards methylene blue dye solution

Photocatalytic Oxidation of Acetone Over High Thermally Stable TiO2 Nanosheets With Exposed (001) Facets

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Drastic promoting the visible photoreactivity of layered carbon nitride by polymerization of dicyandiamide at high pressure

Cited by 147 publications

References 37 publications

Synthesis and photocatalytic H2‐production activity of plasma‐treated Ti3C2Tx MXene modified graphitic carbon nitride

Synthesis and photocatalytic H2‐production activity of plasma‐treated Ti3C2Tx MXene modified graphitic carbon nitride

Effect of calcination temperature, pH and catalyst loading on photodegradation efficiency of urea derived graphitic carbon nitride towards methylene blue dye solution

Photocatalytic Oxidation of Acetone Over High Thermally Stable TiO2 Nanosheets With Exposed (001) Facets

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Synthesis and photocatalytic H₂‐production activity of plasma‐treated Ti₃C₂T_x MXene modified graphitic carbon nitride

Synthesis and photocatalytic H₂‐production activity of plasma‐treated Ti₃C₂T_x MXene modified graphitic carbon nitride