Constructing mesoporous g-C3N4/ZnO nanosheets catalyst for enhanced visible-light driven photocatalytic activity

Pan, Yang; Wang, Jingchuan; Yue, Guozong; Yang, Ruizhu; Zhao, Pengxiang; Yang, Lijun; Zhao, Xiaochong; Astruc, Didier

doi:10.1016/j.jphotochem.2019.112169

Cited by 60 publications

(35 citation statements)

References 40 publications

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“…Since the discovery of g-C 3 N 4 by Wang et al [225] as a promising visible light photocatalyst for the evolution of H 2 , much effort has been directed towards its synthesis. g-C 3 N 4 can be prepared by thermal polymerization using the following precursors based on different reaction conditions and differences in the material degrees of condensation; cyanamide, dicyandiamide, melamine, urea, thiourea and ammonium thiocyanate [227][228][229]. g-C 3 N 4 has a low energy band gap between 2.7 and 2.8 eV as a result of the presence of sp 2 -hybridized carbon and nitrogen forming the π-conjugated electronic structure, possess excellent chemical stability, does not dissolve in acid, alkali or organic solvents making it to be environmentally friendly material [229,230].…”

Section: The Use Of Graphitic Carbon Nitride (G-c 3 N 4 ) As An Efficmentioning

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: The Use Of Graphitic Carbon Nitride (G-c 3 N 4 ) As An Efficmentioning

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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“…In order to elucidate how the hydrozincite precursor of synthesis III is transformed into nanoparticles, a sequence of TEM images was recorded before solvothermal treatment (see Figure S6 in supplementary data). At first some wrinkled overlapped hydrozincite layers were observed with g-C 3 N 4 /ZnO nanosheets resemblance [73]. Once the drying process was performed, the nanorods/nanoparticles mixing phase was observed, suggesting the transformation of hydrozincite layers.…”

Section: Characterizations By Transmission Electron Microscopy (Tem)mentioning

confidence: 97%

Controlled dispersion of ZnO nanoparticles produced by basic precipitation in solvothermal processes

Navas

Ibáñez

González

et al. 2020

Heliyon

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Zinc oxide nanoparticles were successfully synthesized under precipitation processes, using ZnSO 4 ⋅7H 2 O as a Zn 2þ precursor and K 2 CO 3 used as a basic source, and hydrozincite was obtained as an intermediary, which was treated under two procedures; first procedure involved multiple stages to get final precipitated with NaOH, and in the second procedure the hydrozincite was straightforwardly dried at 220 C. By both processes ZnO structures were obtained, which were turned into nanoparticles by a solvothermal treatment, for four hours in ethylene glycol at 200 C. The final products for the first procedure was conglomerate of spherical nanoparticles with sizes ranged between 5-10 nm and dispersed ellipsoidal nanoparticles for the second procedure.Apart off the two procedures mentioned above, another synthesis was carried out with the same Zn 2þ precursor but now using NaOH, and the solvothermal treatment produced ZnO mixed micro-structures which under ultrasonic cavitation disaggregated on mesoporous ZnO nanoplates of hexagonal shapes with nanopore sizes of approximately 0.35 nm. All ZnOs synthesized were structurally characterized with XRD, TEM and FT-IR techniques, and electronically with UV-Vis absorption and diffuse reflectance spectroscopies.

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“…Brie y, by dissolving 1.47 g zinc acetate dehydrate, 0.05 g of PVP and 0.5 g of NaOH in 100 mL of D.I. water under stirring for 1 h. Finally, this dried powder sample annealed at 400 o C for 3 h [4], and subjected to ultrasonication for 30 mins and then washed with D.I. water and ethanol several times to get a homogeneous mixture.…”

Section: Preparation Of G-c 3 N 4 -Zno/cu 2 O Ncsmentioning

confidence: 99%

“…Though, simply exploited UV light, which constrained their wide-ranging application [4][5][6]. The graphitic carbon nitride (g-C 3 N 4 ) has a metal-free potential photocatalyst owing to the visible-light reaction and proper bandgap position (~ 2.7 eV), chemical and thermal constancies, and fortunate electronic structure, agreed to the durable covalent bonds amid the nitrogen (N) and carbon (C) atoms [7].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Cu2O Combined g-C3N4/ZnO Heterostructures For High-Performance Photocatalytic Dye Degradation Under Visible-Light Exposure

Rajendran

Sasireka

Priya

et al. 2021

Preprint

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To assess a highly effective recyclable for visible-light photocatalysts (PCs), in this work, as-formed a ternary g-C3N4-ZnO/Cu2O nanocomposite PCs which was aimed at the photo-degradation of RhB dye. The essential structural, morphological and optical performance of the nanocomposites (NCs) were categorized by XRD, FT-IR, FE-SEM with EDS, UV-Vis DRS absorption and PL spectra analysis. Photocatalytic actions of the as-obtained g-C3N4-ZnO/Cu2O PCs has remained remarkably upgraded, and those showed greater degradation rate than those of other as-obtained samples. Also, that specified existence of the heterojunction among the interfaces of g-C3N4 and ZnO/Cu2O hence developed the response of visible-light absorptions and separation efficacy of the photo-excited charges which heightened the photocatalytic events of the g-C3N4-ZnO/Cu2O PCs. The photo-degradation efficiency of RhB dye over g-C3N4, g-C3N4/ZnO, g-C3N4/Cu2O and g-C3N4-ZnO/Cu2O PCs were 36.4 %, 53 % and 66 %, and 91.4 % in 100 min, which was owing to the number of dye molecules adsorbed on the PCs under visible-light treatment. The recycling stability test was exposed, the g-C3N4-ZnO/Cu2O PCs exhibit a greater photocatalytic action after five reuses. Therefore, the eco-friendly PCs might be broadly useful to the treatment of dye polluted wastewater.

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Constructing mesoporous g-C3N4/ZnO nanosheets catalyst for enhanced visible-light driven photocatalytic activity

Cited by 60 publications

References 40 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

Controlled dispersion of ZnO nanoparticles produced by basic precipitation in solvothermal processes

Investigation on Cu2O Combined g-C3N4/ZnO Heterostructures For High-Performance Photocatalytic Dye Degradation Under Visible-Light Exposure

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