Simple synthesis of g-C3N4/rGO hybrid catalyst for the photocatalytic degradation of rhodamine B

Yuan, Bo; Jiangxia, Wei; Hu, Tianjiao; Yao, Haibo; Jiang, Zhenhua; Fang, Zhiwei; Chu, Zengyong

doi:10.1016/s1872-2067(15)60844-0

Cited by 99 publications

(33 citation statements)

References 32 publications

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“…Semiconductors are able to generate electron and hole pairs when irradiated by light of certain wavelength, and under this circumstance, part of them return to the ground state by recombination, thus coming into being photoluminescent . According to the photoluminescence (PL) spectrum, the migration and recombination state of photoinduced electrons and holes in photocatalysts are surveyed. , In Figure , obviously, there are two sharp emission peaks in the curves: the one at around 410 nm is due to the recombination of electron–hole pairs and the other appearing at 471 nm cannot be defined because its emission mechanism is controversial. , Pure ZnO exhibits the strongest intensity, indicating that the electrons and holes are very likely to recombine on the surface. After introducing CuWO 4 to ZnO, the intensity dramatically weakens, which manifests that CuWO 4 is able to separate photogenerated electrons–holes, and enhanced photocatalytic performance is expected accordingly.…”

Section: Results and Discussionmentioning

confidence: 99%

Hydrothermal Synthesis of the CuWO₄/ZnO Composites with Enhanced Photocatalytic Performance

Chen

Xia

et al. 2020

ACS Omega

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Photocatalytic technology aiming to eliminate organic pollutants in water has been rapidly developed. In this work, we successfully synthesized CuWO 4 /ZnO photocatalysts with different weight ratios of CuWO 4 through facile hydrothermal treatment. Crystal structures, forms, and optical properties of these as-prepared materials were investigated and analyzed. 3% CuWO 4 / ZnO showed the optimum photodegradation efficiency toward methylene blue under the irradiation of simulated sunlight for 120 min, the degradation rate of which was 98.9%. The pseudo-firstorder rate constant of 3% CuWO 4 /ZnO was ∼11.3 and ∼3.5 times bigger than that of pristine CuWO 4 and ZnO, respectively. Furthermore, the material exhibited high stability and reusability after five consecutive photocatalytic tests. In addition, free radical capture experiments were conducted and the possible mechanism proposed explained that the synergistic effect between CuWO 4 and ZnO accelerates the photodegradation reaction. This work provides a feasible technical background for the efficient and sustainable utilization of photocatalysts in wastewater control.

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Section: Results and Discussionmentioning

confidence: 99%

Hydrothermal Synthesis of the CuWO₄/ZnO Composites with Enhanced Photocatalytic Performance

Chen

Xia

et al. 2020

ACS Omega

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“…It is worth noting that, in the composite yGO-CN-3, these peaks referring to COOH have disappeared while a new peak at 1558 cm −1 , which is attributed to the skeletal vibration of graphene sheets, emerges, indicating the formation and presence of rGO in the composite 34 . The ammonia reductive atmosphere formed during the copolymerization of urea and 2,6-Pyridinedicarboxaldehyde has successfully reduced GO 35 .…”

Section: Structure and Compositionmentioning

confidence: 99%

Incorporation of N-Doped Reduced Graphene Oxide into Pyridine-Copolymerized g-C3N4 for Greatly Enhanced H2 Photocatalytic Evolution

Cheng¹,

中国科学院上海硅酸盐研究所²,

Jin³

et al. 2017

Acta Physico-Chimica Sinica

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Here, we fabricated a pyridine-copolymerized g-C3N4 by a novel and cost-effective approach based on Schiff-base chemistry. Thus produced g-C3N4 showed significantly enhanced and stable visible-light photocatalytic H2 evolution performance compared to pristine g-C3N4 obtained from urea. Subsequently, we constructed a composite of pyridine-modified g-C3N4 and N-doped reduced graphene oxide (N-rGO) by facile one-pot calcination to elevate the photocatalytic efficiency further. The peak H2 production rate achieved using this composite was 304 µmol•h −1 , about 11.7 and 3.1 times as those obtained using pure g-C3N4 and pyridine-modified g-C3N4, respectively. In addition to enhanced visible light absorbance and enlarged surface area, the promoted separation, transfer, and surface reactivity of photogenerated charge carriers by the pyridine ring as intramolecular electron acceptor and N-rGO as "electron-transfer activation region" are considered responsible for the remarkably enhanced photocatalytic activity.No.7 CHENG Ruo-Lin et al.: Incorporation of N-Doped rGO into Pyridine-Copolymerized g-C 3 N 4

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“…However, the fast recombination of photoinduced electrons and holes limiting electronic conduction, and insufficient light absorption beyond 460 nm greatly hinder the light-driven catalytic performance of g-C 3 N 4 . Various approaches were thus developed to address this issue, such as heteroatom doping [4][5][6] , constructing heterostructure [7][8][9] , edge-functionalization [10] , morphology control [11][12][13] , and combining g-C 3 N 4 with carbonaceous materials [14][15][16] . During the past years, several kinds of organics have been reported to construct C doped g-C 3 N 4 .…”

Section: Introductionmentioning

confidence: 99%

In situ Carbon Modification of g-C3N4 from Urea co-Crystal with Enhanced Photocatalytic Activity Towards Degradation of Organic Dyes Under Visible Light

Zhao

Hao

Gai

et al. 2020

Chem. Res. Chin. Univ.

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An in situ strategy was introduced for synthesizing carbon modified graphitic carbon nitride(g-C 3 N 4 ) by using urea/4-aminobenzoic acid(PABA) co-crystal(PABA@Urea) as precursor materials. Via co-calcination of the PABA co-former and the urea in PABA@Urea co-crystals, C guest species were generated and compounded into g-C 3 N 4 matrix in situ by replacing the lattice N of the carbon nitride and forming carbon dots onto its layer surface. The carbon modification dramatically enhanced visible-light harvesting and charge carrier separation. Therefore, visible light photo-catalytic oxidation of methylene blue(MB) pollution in water over the carbon modified g-C 3 N 4 (C/g-C 3 N 4 ) was notably improved. Up to 99% of methylene blue(MB) was eliminated within 60 min by the optimal sample prepared from the PABA@Urea co-crystal with a PABA content of 0.1%(mass ratio), faster than the degradation rate over bare g-C 3 N 4 . The present study demonstrates a new way to boost up the photocatalysis performance of g-C 3 N 4 , which holds great potential concerning the degradation of organic dyes from water.

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Simple synthesis of g-C3N4/rGO hybrid catalyst for the photocatalytic degradation of rhodamine B

Cited by 99 publications

References 32 publications

Hydrothermal Synthesis of the CuWO₄/ZnO Composites with Enhanced Photocatalytic Performance

Hydrothermal Synthesis of the CuWO₄/ZnO Composites with Enhanced Photocatalytic Performance

Incorporation of N-Doped Reduced Graphene Oxide into Pyridine-Copolymerized g-C<sub>3</sub>N<sub>4</sub> for Greatly Enhanced H<sub>2</sub> Photocatalytic Evolution

In situ Carbon Modification of g-C3N4 from Urea co-Crystal with Enhanced Photocatalytic Activity Towards Degradation of Organic Dyes Under Visible Light

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Simple synthesis of g-C3N4/rGO hybrid catalyst for the photocatalytic degradation of rhodamine B

Cited by 99 publications

References 32 publications

Hydrothermal Synthesis of the CuWO4/ZnO Composites with Enhanced Photocatalytic Performance

Hydrothermal Synthesis of the CuWO4/ZnO Composites with Enhanced Photocatalytic Performance

Incorporation of N-Doped Reduced Graphene Oxide into Pyridine-Copolymerized g-C<sub>3</sub>N<sub>4</sub> for Greatly Enhanced H<sub>2</sub> Photocatalytic Evolution

In situ Carbon Modification of g-C3N4 from Urea co-Crystal with Enhanced Photocatalytic Activity Towards Degradation of Organic Dyes Under Visible Light

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Hydrothermal Synthesis of the CuWO₄/ZnO Composites with Enhanced Photocatalytic Performance

Hydrothermal Synthesis of the CuWO₄/ZnO Composites with Enhanced Photocatalytic Performance