The ultra-rapid synthesis of rGO/g-C3N4 composite via microwave heating with enhanced photocatalytic performance

Gu, Yongpan; Yu, Yongjia; Zou, Jingye; Shen, Tiantian; Qinan, Xu; Yue, Xiawei; Meng, Jian; Wang, Jigang

doi:10.1016/j.matlet.2018.08.077

Cited by 24 publications

(9 citation statements)

References 21 publications

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“…Both graphene oxide and reduced graphene oxide can be used for the photocatalytic degradation of PPCPs. GO–TiO 2 can be prepared via the following method; solution mixing, sol–gel, hydrothermal, electrostatic self-assembly, molecular grafting, chemical exfoliation, liquid phase deposition, and electrospinning [ 95 , 210 , 211 ].…”

Section: Carbon-solid Supports In Photocatalytic Degradationmentioning

confidence: 99%

Pharmaceuticals and personal care products in water and wastewater: a review of treatment processes and use of photocatalyst immobilized on functionalized carbon in AOP degradation

2020

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The presence of emerging contaminants such as pharmaceutical and personal care products in many aqueous matrices have been reported. One of such matrix is streams of wastewater, including wastewater treatment plants inflows and outflows and wastewater flow by-passing wastewater treatment plants. Their persistence arises from their resistant to breakdown, hence they may remain in the environment over long time, with a potential to cause adverse effects including endocrine disruption, gene toxicity, the imposition of sex organs, antibiotic resistance and many others in some aquatic organisms exposed to arrays of residues of pharmaceutical and personal care products. Among the treatment techniques, advanced oxidation processes have been reported to be a better technique through which these PPCPs can be degraded in the WWTPs. Heterogeneous photocatalysis using various photocatalyst immobilized on solid support such as activated carbon, graphene and carbon nanotubes in AOPs have been shown to be a viable and efficient method of PPCPs degradation. This is because, the performance of most WWTPs is limited since they were not designed to degrade toxic and recalcitrant PPCPs. This review highlight the occurrence, concentration of PPCPs in wastewater and the removal efficiency of heterogeneous photocatalysis of TiO2 immobilized on solid supports.

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Section: Carbon-solid Supports In Photocatalytic Degradationmentioning

confidence: 99%

Pharmaceuticals and personal care products in water and wastewater: a review of treatment processes and use of photocatalyst immobilized on functionalized carbon in AOP degradation

2020

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“…24,25 Modification of g-C 3 N 4 with RGO has exhibited considerable progress due to it promotes separation of charges. Therefore, numerous research efforts were made to improve g-C 3 N 4 efficiency such as RGO/protonated g-C 3 N 4 , 26 RGO/g-C 3 N 4 , 27 RGO/g-C 3 N 4 , 28 and g-C 3 N 4 /GO. 29 In the current development, ternary nanostructures such as nanoplates, nanosheets, microspheres, and nanorods have gained much attention and exhibited magnificent performances in photoinduced CO 2 reduction and other energy applications.…”

Section: Introductionmentioning

confidence: 99%

Indirect Z-Scheme Assembly of 2D ZnV₂O₆/RGO/g-C₃N₄ Nanosheets with RGO/pCN as Solid-State Electron Mediators toward Visible-Light-Enhanced CO₂ Reduction

Bafaqeer

Tahir

Khan

et al. 2019

Ind. Eng. Chem. Res.

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Indirect Z-scheme assembly of graphene-bridged 2D ZnV2O6/pCN nanosheets composite has been fabricated by one-step solvothermal process and tested for photoinduced CO2 conversion under visible-light irradiations. The highest CH3OH production of 3488 μmol g-cat–1 was obtained over ZnV2O6/RGO/g-C3N4 composite, 1.02 and 1.25 times higher comparing to ZnV2O6/RGO and ZnV2O6/g-C3N4 samples, respectively. This enhanced efficiency can be ascribed to well-designed ternary heterojunction with hierarchical structure and efficient charges separation by RGO. More importantly, CH3OH yield was further improved by introducing RGO/pCN as an electron sink, which led to a 1.07 times higher yield than using only RGO. This reveals that ternary 2D ZnV2O6/RGO/pCN nanostructure has higher visible-light absorption, improved charge separation, and enhanced photocatalytic efficiency due to RGO/pCN as multiple mediators. The stability of composite catalyst also prevailed for 32 h for continuous CH3OH production. Therefore, structured Z-scheme composite with multiple electron mediators enables efficient CO2 conversion under visible-light irradiation.

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“…Apparently, the strong absorption peak exhibited by pristine g-C 3 N 4 at 460 nm was consistent with the absorption edge of the UV diffuse re ection spectrum, which indicated that the recombination of the photogenerated electron − hole pair was severe (Yu et al 2013). Once cadmium was introduced, the highest intensity position showed a gradual red-shifted from 460 nm of g-C 3 N 4 to 490 nm of Cd/g-C 3 N 4 , which was associated with the band gap narrowing effect (Zou et al 2019) (Gu et al 2018). Obviously, the PL signals of Cd/g-C 3 N 4 samples signi cantly fell with the doping of cadmium and 10 Cd/g-C 3 N 4 was the lowest, which illustrated that Cd doping restrained the recombination of photoinduced charge carriers and further proved that 10 Cd/g-C 3 N 4 composite possessed the best removing e ciency (Thomas et al 2008).…”

Section: Optical Propertiesmentioning

confidence: 96%

Facile Synthesis of Metal Doped Graphite Carbon Nitride for Photocatalytic Degradation of Tetracycline Under Visible Light Irradiation

Zhao

Qin

luo³

et al. 2021

Preprint

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Using semiconductor photocatalysts for antibiotic contaminants degradation under visible light has become a hot topic in recent years. Herein, a novel cadmium doped graphite phase carbon nitride (Cd/g-C3N4) photocatalyst was successfully constructed via 60 °C oil bath method to degrade tetracycline. Experimental and characterization results revealed that cadmium was well doped at g-C3N4 surface and exhibited high intercontact with g-C3N4. Meanwhile, Cd/g-C3N4 presented excellent electrical conductivity and inhibited the recombination of electron-hole pairs. The introduction of cadmium significantly improved the photocatalytic activity and the degradation efficiency of 10 Cd/g-C3N4 reached to 89.09%, which was exceeded 2.0 times than pure g-C3N4 (43.99%). Additionally, the quenching experiments and electron spin-resonance tests exhibited holes (h+), hydroxyl radicals (•OH) and superoxide radicals (•O2−) were dominated active species in TC degradation. Furthermore, the effects of various conditions on the reaction process, such as different pH, initial TC concentrations and catalyst dosage, were also researched. This work gives a reasonable point to synthesize high-efficiency and economic photocatalysts.

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The ultra-rapid synthesis of rGO/g-C3N4 composite via microwave heating with enhanced photocatalytic performance

Cited by 24 publications

References 21 publications

Pharmaceuticals and personal care products in water and wastewater: a review of treatment processes and use of photocatalyst immobilized on functionalized carbon in AOP degradation

Pharmaceuticals and personal care products in water and wastewater: a review of treatment processes and use of photocatalyst immobilized on functionalized carbon in AOP degradation

Indirect Z-Scheme Assembly of 2D ZnV₂O₆/RGO/g-C₃N₄ Nanosheets with RGO/pCN as Solid-State Electron Mediators toward Visible-Light-Enhanced CO₂ Reduction

Facile Synthesis of Metal Doped Graphite Carbon Nitride for Photocatalytic Degradation of Tetracycline Under Visible Light Irradiation

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The ultra-rapid synthesis of rGO/g-C3N4 composite via microwave heating with enhanced photocatalytic performance

Cited by 24 publications

References 21 publications

Pharmaceuticals and personal care products in water and wastewater: a review of treatment processes and use of photocatalyst immobilized on functionalized carbon in AOP degradation

Pharmaceuticals and personal care products in water and wastewater: a review of treatment processes and use of photocatalyst immobilized on functionalized carbon in AOP degradation

Indirect Z-Scheme Assembly of 2D ZnV2O6/RGO/g-C3N4 Nanosheets with RGO/pCN as Solid-State Electron Mediators toward Visible-Light-Enhanced CO2 Reduction

Facile Synthesis of Metal Doped Graphite Carbon Nitride for Photocatalytic Degradation of Tetracycline Under Visible Light Irradiation

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Indirect Z-Scheme Assembly of 2D ZnV₂O₆/RGO/g-C₃N₄ Nanosheets with RGO/pCN as Solid-State Electron Mediators toward Visible-Light-Enhanced CO₂ Reduction