Core-shell g-C3N4@ZnO composites as photoanodes with double synergistic effects for enhanced visible-light photoelectrocatalytic activities

Wang, Jian; Yang, Zhijie; Gao, Xingxing; Yao, Wenqing; Wei, Weiqin; Chen, Xianjie; Zong, Ruilong; Zhu, Yongfa

doi:10.1016/j.apcatb.2017.05.034

Cited by 200 publications

(88 citation statements)

References 72 publications

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“…Moreover, TiO 2 particles can be coupled with a variety of other materials, e.g. membranes/nanofibres [108,109], graphitic nitride g-C 3 N 4 [110] (similar work has been carried out with ZnO [111]), and graphene oxide [106] to serve as a composite for photoanode with a double synergistic effect or for the photocatalytic degradation of pollutants.…”

Section: Water / Wastewater / Soilmentioning

confidence: 99%

Major Advances and Challenges in Heterogeneous Catalysis for Environmental Applications: A Review

Wacławek

Padil

Černík

2018

Ecological Chemistry and Engineering S

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Heterogeneous catalysis is one of the fastest developing branches of chemistry. Moreover, it is strongly connected to popular environment-related applications. Owing to the very fast changes in this field, for example, numerous discoveries in nanoscience and nanotechnologies, it is believed that an update of the literature on heterogeneous catalysis could be beneficial. This review not only covers the new developments of heterogeneous catalysis in environmental sciences but also touches its historical aspects. A short introduction to the mechanism of heterogeneous catalysis with a small section on advances in this field has also been elaborated. In the first part, recent innovations in the field of catalytic air, water, wastewater and soil treatment are presented, whereas in the second part, innovations in the use of heterogeneous catalysis for obtaining sustainable energy and chemicals are discussed. Catalytic processes are ubiquitous in all branches of chemistry and there are still many unsolved issues concerning them.

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Section: Water / Wastewater / Soilmentioning

confidence: 99%

Major Advances and Challenges in Heterogeneous Catalysis for Environmental Applications: A Review

Wacławek

Padil

Černík

2018

Ecological Chemistry and Engineering S

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“…The high contact area is a boost for fast charge transfer and facile catalyst dispersion, which enhances the photocatalytic performance. It is noteworthy to mention here that, g‐C 3 N 4 nanocomposites with ZnO has been reported for photocatalytic and photoelectrocatalytic pollutant removals, and CO 2 reduction ,. However, to the best of our knowledge, there is no report on 2D‐2D nanosheet nanocomposites of N‐ZnO and g‐C 3 N 4 for pollutants removal.…”

Section: Introductionmentioning

confidence: 79%

Highly Efficient Visible Light Active 2D‐2D Nanocomposites of N‐ZnO‐g‐C₃N₄ for Photocatalytic Degradation of Diverse Industrial Pollutants

Kumar

et al. 2018

ChemistrySelect

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In the drive towards the development of efficient photocatalytic materials for environmental remediation, two dimensional (2D) materials have drawn huge attention in the recent time. Towards this end, we report two dimensional (2D) nanocomposite by loading N-doped ZnO nanosheets over graphitic carbon nitride (g-C 3 N 4 ) nanosheets by hydrothermal synthesis method. As prepared 2D-2D nanocomposite exhibit excellent photocatalytic activity towards degradation of Rhodamine B (RhB) dye from water under visible light irradiation. Moreover, the optimized nanocomposite with 7 wt% of N-ZnO nanosheets (GNZ7) shows superior photocatalytic activity for degradation of several industrial pollutants including thiabendazole (TBZ), nitrobenzene (NB) and tetracycline (TC). The photoluminescence studies confirmed the improved interfacial charge separation which profoundly promotes their transfer to the reaction sites and hence responsible for the enhanced photocatalytic activity. In addition, the photocatalytic mechanism has been elucidated using active species trapping experiments which validate that hydroxyl radicals (*OH) and holes (h + ) play a vital role in the degradation process. Furthermore, reusability experiments confirm the excellent stability of N-ZnO-g-C 3 N 4 nanocomposites. Hence, it can be summarized that such 2D-2D nanocomposite have great potential to degrade diverse industrial pollutants and provides new insights for the fabrication of such nanocomposites for various applications.[a] S.

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“…This phenomenon is known as dye-sensitization, in which electrons of dye are excited by visible light absorption (11). The excited electrons (12) can be further transferred from the LUMO of dyes to the conduction band of GCN in CS/GCN composite (13). In this process cationic radicals and active electrons are formed.…”

Section: Resultsmentioning

confidence: 99%

Core/Shell Structure of Mesoporous Carbon Spheres and g-C3N4 for Acid Red 18 Decolorization

et al. 2019

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Spherical photocatalyst based on ordered mesoporous carbon and graphitic carbon nitride with core/shell structure (CS/GCN) was successfully synthesized via facile electrostatic self-assembly strategy. The photocatalytic properties of the hybrid were evaluated by the decomposition of Acid Red 18 under simulated solar light irradiation in comparison to the bulk graphitic carbon nitride (GCN). The results clearly revealed that coupling of carbon nitride with mesoporous carbon allows the catalyst to form with superior photocatalytic performance. The photoactivity of CS/GCN was over nine times higher than that of pristine GCN. Introducing mesoporous carbon into GCN induced higher surface area of the heterojunction and also facilitated the contact surface between the two phases. The synergistic effect between those two components enhanced the visible light-harvesting efficiency and improved photoinduced charge carrier generation, and consequently their proper separation. The electrochemical behavior of the obtained composite was also evaluated by electrochemical impedance, transient photocurrent response and linear sweep potentiometry measurements. The results confirmed that transport and separation of charge carriers in the hybrid was enhanced in comparison to the reference bulk graphitic carbon nitride. Detailed electrochemical, photoluminescence and radical scavenger tests enabled determination of the possible mechanism of photocatalytic process. This work presents new insights to design a core/shell hybrid through the simple preparation process, which can be successfully used as an efficient photocatalyst for the treatment of wastewater containing dyes under solar light irradiation.Catalysts 2019, 9, 1007 2 of 17 increase the surface area, the porosity in the structure of GCN can be additionally induced. Mesoporous photocatalysts received considerable research interest because they contain a special pore network, which facilitates the diffusion of the reactants and products. Moreover, the large surface area offers more active sites. Therefore, for an economical utilization of GCN, the researchers should strive to find the way for enhancing its photocatalytic properties [10,11].Up to now, different strategies, including introducing foreign elements, designing nanoporous structures, texturization, supramolecular assembly and creating effective heterojunctions, have been developed to enhance the photoactivity of GCN [12]. A large number of studies have confirmed that building a heterojunction system is an effective method to improve the separation efficiency of the photogenerated electrons and holes which dramatically improves the photocatalytic performance [13].To form an efficient heterojunction, GCN has been coupled with other semiconductors such as TiO , etc. [12,[14][15][16][17][18][19][20][21]. Unfortunately, the particles (often in the agglomerated form) were usually loaded randomly on the GCN sheets in composites causing low conjunction of GCN with a semiconductor which consequently limited charge transfer and...

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Core-shell g-C3N4@ZnO composites as photoanodes with double synergistic effects for enhanced visible-light photoelectrocatalytic activities

Cited by 200 publications

References 72 publications

Major Advances and Challenges in Heterogeneous Catalysis for Environmental Applications: A Review

Major Advances and Challenges in Heterogeneous Catalysis for Environmental Applications: A Review

Highly Efficient Visible Light Active 2D‐2D Nanocomposites of N‐ZnO‐g‐C₃N₄ for Photocatalytic Degradation of Diverse Industrial Pollutants

Core/Shell Structure of Mesoporous Carbon Spheres and g-C3N4 for Acid Red 18 Decolorization

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Core-shell g-C3N4@ZnO composites as photoanodes with double synergistic effects for enhanced visible-light photoelectrocatalytic activities

Cited by 200 publications

References 72 publications

Major Advances and Challenges in Heterogeneous Catalysis for Environmental Applications: A Review

Major Advances and Challenges in Heterogeneous Catalysis for Environmental Applications: A Review

Highly Efficient Visible Light Active 2D‐2D Nanocomposites of N‐ZnO‐g‐C3N4 for Photocatalytic Degradation of Diverse Industrial Pollutants

Core/Shell Structure of Mesoporous Carbon Spheres and g-C3N4 for Acid Red 18 Decolorization

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Highly Efficient Visible Light Active 2D‐2D Nanocomposites of N‐ZnO‐g‐C₃N₄ for Photocatalytic Degradation of Diverse Industrial Pollutants