In situ co-pyrolysis fabrication of CeO2/g-C3N4 n–n type heterojunction for synchronously promoting photo-induced oxidation and reduction properties

Tian, Na; Huang, Hongwei; Liu, Chengyin; Dong, Fan; Zhang, Tierui; Du, Xin; Shen, Yu; Zhang, Yihe

doi:10.1039/c5ta03669k

Cited by 333 publications

(170 citation statements)

References 44 publications

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“…Similar MS curves of g‐CN, pg‐CN and pg‐CNNS (Figure c‐e) suggest their similar electronic structure and conduction behavior. Also, the n type semiconductor behavior is consistent with these previous results . The E fb values of g‐CN, pg‐CN and pg‐CNNS are the X‐axis intercepts of prolonging tangents that are evaluated to be −1.02 eV, −0.90 eV and −1.01 eV vs. Ag/AgCl, respectively.…”

Section: Resultssupporting

confidence: 90%

Highly Efficient Photo‐Reduction of p‐Nitrophenol by Protonated Graphitic Carbon Nitride Nanosheets

et al. 2018

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Photocatalytic reduction of p‐nitrophenol to p‐aminophenol is important because of the high toxicity of p‐nitrophenol and the wide application of p‐aminophenol. Graphitic carbon nitride (g‐CN) is an excellent photocatalyst for various photo‐reduction reactions, but inefficient for photo‐reduction of p‐nitrophenol due to the electrostatic exclusion. In this work, we control the morphology and surface property of g‐CN and achieve significantly enhanced activity. The obtained protonated g‐CN nanosheet (pg‐CNNS) material has positively charged surface that can adsorb p‐nitrophenolate anions, therefore facilitating the transfer of photo‐generated electrons from catalyst to p‐nitrophenol. Its reaction rate is 1626 times higher than that of the pristine g‐CN. Besides the surface charge, the morphology of photocatalyst also has important effect on activity, which is demonstrated by the relatively low activity of protonated g‐CN in comparison to pg‐CNNS. The pg‐CNNS photocatalyst has an excellent stability and superior catalytic universality for photo‐reduction of various nitroaromatic compounds. This work does not only expand the application of a well‐known material, but also highlights the importance of understanding photocatalytic mechanism for designing photocatalyst.

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Section: Resultssupporting

confidence: 90%

Highly Efficient Photo‐Reduction of p‐Nitrophenol by Protonated Graphitic Carbon Nitride Nanosheets

et al. 2018

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“…Nevertheless, the improvement in photocurrent was linked to a red‐shift of optical adsorption, exciton splitting and improved charge separation. On the other hand, the photocurrent patterns reported for various photoefficient forms of g‐C 3 N 4 differ from our patterns and show the positive trend upon irradiation without an intensity spike . Once again, no attempts to report the mechanics of the process were provided in the literature.…”

Section: Textural Parameters Calculated From N2 Adsorption Measuremencontrasting

confidence: 95%

Photoactivity of g‐C₃N₄/S‐Doped Porous Carbon Composite: Synergistic Effect of Composite Formation

et al. 2016

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A composite of g-C3 N4 with visible-light photoactive S-doped carbon was synthesized. Synergistic effects in surface chemistry and electrical conductivity, and a decrease in the band gap (Eg , estimated from optical measurements) from 2.91 eV for g-C3 N4 to 2.79 eV for the composite were found. Both the carbon and the composite showed photosensitivity but only the composite revealed a visible-light-driven reduction activity.

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“…SCE (i.e., −0.30, −0.25 and −0.23 V vs NHE), respectively. The positive slopes of the C −2 ‐E plot indicate that BiOCl, BiOCl 0.5 Br 0.5 and BiOBr belong to n‐ type semiconductors with the CB position more negative by 0.1 V than the flat band potential . Therefore, the E CB values of BiOCl, BiOCl 0.5 Br 0.5 and BiOBr were −0.40, −0.35 and −0.33 V, respectively .…”

Section: Resultsmentioning

confidence: 96%

Milling‐Induced Synthesis of BiOCl_1‐xBr_x Solid Solution and Their Adsorptive and Photocatalytic Performance

Jia¹,

Han²,

Wang³

et al. 2018

Photochem & Photobiology

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CH COO(BiO) (denoted as BiOAc) is one of the most easily obtained bismuth compounds and was for the first time proposed by our group as an effective UV light photocatalyst. Herein, BiOCl Br (x refers to the feeding atomic ratio) were obtained using a facile solid state milling and subsequent water washing. More importantly, all of the as-prepared BiOCl Br possessed better visible light photocatalytic activity to the corresponding ones obtained by previously reported solution route. Especially at an optimal x value of 0.5, the solid solution showed the highest photodegradation efficiency (~100%) for rhodamine B (RhB) with a concentration of 30 mg L , whereas the degradation efficiency was only 63% over that obtained by solution route. Furthermore, the as-prepared BiOCl Br also exhibited excellent photodegradation activity for malachite green (MG). The superior photocatalytic performance of the as-prepared BiOCl Br could be attributed to its thinner sheetlike structures and highly exposed (001) facets, which enable effective separation of the photogenerated electrons and holes along the [001] direction. In addition, the as-prepared BiOCl Br revealed dramatic adsorption capacity for cationic dyes like MG, RhB and methylene violet (MV), as well as anion (Cr O ) owing to electrostatic interaction between cationic dyes and negatively charged surface of BiOCl Br , and positively charged surface in K Cr O solution (pH ≈ 3).

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In situ co-pyrolysis fabrication of CeO₂/g-C₃N₄ n–n type heterojunction for synchronously promoting photo-induced oxidation and reduction properties

Abstract: CeO2/g-C3N4 n–n type heterojunction was successfully constructed via a facile in situ co-pyrolysis route by employing Ce(IO3)3 and melamine as precursors. It exhibits high photo-induced oxidation and reduction properties for degradation of phenol, NO removal and hydrogen evolution.

Cited by 333 publications

References 44 publications

Highly Efficient Photo‐Reduction of p‐Nitrophenol by Protonated Graphitic Carbon Nitride Nanosheets

Highly Efficient Photo‐Reduction of p‐Nitrophenol by Protonated Graphitic Carbon Nitride Nanosheets

Photoactivity of g‐C₃N₄/S‐Doped Porous Carbon Composite: Synergistic Effect of Composite Formation

Milling‐Induced Synthesis of BiOCl_1‐xBr_x Solid Solution and Their Adsorptive and Photocatalytic Performance

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In situ co-pyrolysis fabrication of CeO2/g-C3N4 n–n type heterojunction for synchronously promoting photo-induced oxidation and reduction properties

Abstract: CeO2/g-C3N4 n–n type heterojunction was successfully constructed via a facile in situ co-pyrolysis route by employing Ce(IO3)3 and melamine as precursors. It exhibits high photo-induced oxidation and reduction properties for degradation of phenol, NO removal and hydrogen evolution.

Cited by 333 publications

References 44 publications

Highly Efficient Photo‐Reduction of p‐Nitrophenol by Protonated Graphitic Carbon Nitride Nanosheets

Highly Efficient Photo‐Reduction of p‐Nitrophenol by Protonated Graphitic Carbon Nitride Nanosheets

Photoactivity of g‐C3N4/S‐Doped Porous Carbon Composite: Synergistic Effect of Composite Formation

Milling‐Induced Synthesis of BiOCl1‐xBrx Solid Solution and Their Adsorptive and Photocatalytic Performance

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In situ co-pyrolysis fabrication of CeO₂/g-C₃N₄ n–n type heterojunction for synchronously promoting photo-induced oxidation and reduction properties

Photoactivity of g‐C₃N₄/S‐Doped Porous Carbon Composite: Synergistic Effect of Composite Formation

Milling‐Induced Synthesis of BiOCl_1‐xBr_x Solid Solution and Their Adsorptive and Photocatalytic Performance