Recent advance of graphene/semiconductor composite nanocatalysts: Synthesis, mechanism, applications and perspectives

Hu, Yumeng; Zhou, Chengyun; Wang, Han; Chen, Ming; Zeng, Guangming; Liu, Zhifeng; Yang, Liu; Wang, Wenjun; Wu, Ting; Shao, Bin; Liang, Qinghua

doi:10.1016/j.cej.2021.128795

Cited by 43 publications

(8 citation statements)

References 226 publications

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“…The original GO exhibits an irregular layered flaky structure with rough edges and smooth surfaces, shown in Figure 3D (Liu et al, 2017). According to the previous work, after 550 °C treatment, GO was reduced to rGO (Shanavas Hu et al, 2021), while the wrinkles and curls could be observed from rGO (Agarwal and Zetterlund, 2021). However, although the porous structure of 7.5% GCN and the interface between rGO and MCB 0.07 can be observed (Figure 3B), the pore of 7.5% GCN was inapparent and messy than MCB 0.07 .…”

Section: Characterization Of Photocatalystsmentioning

confidence: 83%

“…As shown in Supplementary Table S5, the weight ratio of C and O in 7.5% GCN and 10% IGCN increased, while the weight ratio of N decreased compared with MCB 0.07 . This can indicate that rGO was successfully introduced to the sample since rGO has residual O-containing groups (Hu et al, 2021). The presence of about 2.52% Fe on 10% IGCN indicated the successful loading of nZVI, and Fe was also uniformly distributed on the samples.…”

Section: Characterization Of Photocatalystsmentioning

confidence: 86%

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Visible-light-driven nanoscale zero-valent iron loaded rGO/g-C3N4 for fluoroquinolone antibiotics degradation in water

Liu

Xie

Jiao

et al. 2022

Front. Environ. Sci.

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Fluoroquinolone antibiotics attract increasing attention in the water treatment field because of the potential adverse effects on aquatic ecosystems and human health. The graphitic carbon nitride (g-C3N4) based photocatalysis has been demonstrated as an economically feasible and environmentally benign process to control these persistent contaminants. In this study, a new visible-light-driven of reduced graphene oxide (rGO) and nanoscale zero-valent iron (nZVI) co-modified g-C3N4-based photocatalyst was synthesized via ultrasonication-assisted chemisorption method. The optimized nZVI-loaded rGO/g-C3N4 (10% IGCN) showed a reaction rate enhancement of 2.12∼3.69-fold and 1.20∼1.68-fold for the degradation of ofloxacin (OFL), norfloxacin (NOR), and ciprofloxacin (CIP) compared to that of carbon-doped g-C3N4 (MCB0.07) and rGO-supported g-C3N4 (7.5% GCN) under the irradiation of simulated visible light, respectively. The enhanced photocatalytic activity can be ascribed to the synergistic effect of nZVI and rGO to improve the separation of charge carriers and boost the harvest of visible light. The degradation mechanisms were explored by scavenger tests and X-ray photoelectron spectroscopy (XPS), indicating that holes (h+) played a dominant role in the decomposition of OFL, NOR, and CIP. The piperazine ring and C–N between the piperazine ring and benzene were the primary attack sites of h+. In addition, the ring-opening oxidation of benzene (C=C bond) connected by the C–F bond may also be an essential step. This study shed light on the degradation mechanism of OFL, NOR, and CIP under visible light irradiation of the 10% IGCN and provided theoretical support for the practical application of photocatalysis in treating antibiotics-containing water.

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Section: Characterization Of Photocatalystsmentioning

confidence: 83%

Section: Characterization Of Photocatalystsmentioning

confidence: 86%

Visible-light-driven nanoscale zero-valent iron loaded rGO/g-C3N4 for fluoroquinolone antibiotics degradation in water

Liu

Xie

Jiao

et al. 2022

Front. Environ. Sci.

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“…The recyclability of these photocatalysts was achieved by centrifugation in both cases, being able to perform the reaction four and six times, respectively, maintaining their performance. Graphene-based composites have been recently employed in many photocatalytic processes, such as those related to the environmental area [138][139][140]. Metal-free graphene quantum dots (GQDs) and carbon quantum dots (CQDs) are interesting materials due to their unique physical and chemical properties, demonstrated to have various photocatalytic applications [141,142].…”

Section: Heterogeneous Oxidative Dehydrogenation Of C-n Bondsmentioning

confidence: 99%

“…Metal-free graphene quantum dots (GQDs) and carbon quantum dots (CQDs) are interesting materials due to their unique physical and chemical properties, demonstrated to have various photocatalytic applications [141,142]. Thus, the aerobic oxidative coupling of benzylamines for the preparation of 2 has been successfully carried out with nitrogen-and sulfur-codoped GQDs synthesized from a catecholamine derivative (NS-GQDs, 63) [143], oxygen-rich CQDs (O-CQDs, 64) [144] and dimethylamino-functionalized GQDs (GQD-DMA, 65) Graphene-based composites have been recently employed in many photocatalytic processes, such as those related to the environmental area [138][139][140]. Metal-free graphene quantum dots (GQDs) and carbon quantum dots (CQDs) are interesting materials due to their unique physical and chemical properties, demonstrated to have various photocatalytic applications [141,142].…”

Section: Heterogeneous Oxidative Dehydrogenation Of C-n Bondsmentioning

confidence: 99%

Visible Light-Induced Aerobic Oxidative Dehydrogenation of C–N/C–O to C=N/C=O Bonds Using Metal-Free Photocatalysts: Recent Developments

Torregrosa-Chinillach

Chinchílla

2022

Molecules

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Performing synthetic transformation using visible light as energy source, in the presence of a photocatalyst as a promoter, is currently of high interest, and oxidation reactions carried out under these conditions using oxygen as the final oxidant are particularly convenient from an environmental point of view. This review summarizes the recent developments achieved in the oxidative dehydrogenation of C–N and C–O bonds, leading to C=N and C=O bonds, respectively, using air or pure oxygen as oxidant and metal-free homogeneous or recyclable heterogeneous photocatalysts under visible light irradiation.

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“…Graphene oxide (GO), obtained by chemically modified from graphene, is a novel material composed of sp 2 hybridized carbon atoms packing tightly into a monolayer two-dimensional honeycomb lattice structure. It has been widely applied in photocatalysis because of its large specific surface areas, high thermal conductivity, fast electron mobility and strong Young’s modulus ( Hu Y. et al, 2021 ). In rGO/TiO 2 nanocomposites, the network structure of rGO with large surface area and oxygen-containing functional groups are idea platforms for the tight-binding with TiO 2 to avoid the agglomeration of TiO 2 and enhance the photocatalytic effect of rGO/TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Reduced Graphene Oxide /TiO2 Blended Polyphenylene sulfone Antifouling Composite Membrane With Improved Photocatalytic Degradation Performance

et al. 2021

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Nanosized titanium oxide (TiO2)-based photocatalysts have exhibited great potential for the degradation of organic contaminants, while their weak absorption of visible light limits the photocatalytic efficiency. Herein, a novel reduced graphene oxide/TiO2-polyphenylenesulfone (rGO/TiO2-PPSU) hybrid ultrafiltration membrane has been successfully prepared via a non-solvent induced phase-separation method, in which the synergistic coupling between the rGO and TiO2 could endowed the fabricated membranes with visible-light-driven efficient photocatalytically degradation of organic pollutants and outstanding photocatalytic and antifouling properties. Compared with the PPSU membranes prepared with Graphene oxide and TiO2, respectively, the rGO/TiO2-PPSU membrane demonstrated significant photodegradation towards phenazopyridine hydrochloride (PhP) solution under ultraviolet light (improved about 71 and 43%) and visible light (improved about 153 and 103%). The permeability and flux recovery rates of the membrane indicated that the high flux of the rGO/TiO2-PPSU membrane can be greatly restored after fouling, due to the improved self-cleaning properties under visible light static irradiation. With the properties of high performance of photocatalytic degradation and good self-cleaning ability, the rGO/TiO2-PPSU membrane would have great potential in water treatment.

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Recent advance of graphene/semiconductor composite nanocatalysts: Synthesis, mechanism, applications and perspectives

Cited by 43 publications

References 226 publications

Visible-light-driven nanoscale zero-valent iron loaded rGO/g-C3N4 for fluoroquinolone antibiotics degradation in water

Visible-light-driven nanoscale zero-valent iron loaded rGO/g-C3N4 for fluoroquinolone antibiotics degradation in water

Visible Light-Induced Aerobic Oxidative Dehydrogenation of C–N/C–O to C=N/C=O Bonds Using Metal-Free Photocatalysts: Recent Developments

Preparation and Characterization of Reduced Graphene Oxide /TiO2 Blended Polyphenylene sulfone Antifouling Composite Membrane With Improved Photocatalytic Degradation Performance

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