Synthesis of C3N4-decorated ZnO and Ag/ZnO nanoparticles via calcination of ZIF-8 and melamine for photocatalytic removal of methyl orange

Li, Zirong; Mei, Jinxiang; Bai, Lei

doi:10.1007/s11696-018-0656-7

Cited by 9 publications

(10 citation statements)

References 26 publications

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“…Although different water treatment techniques have been developed to deal with dye pollution, photocatalytic degradation seemed to be the most promising method [8]. Therefore, the synthesis of efficient and environmentally friendly photocatalysts has attracted ever-increasing attention [9,10]. TiO 2 − and ZnO−based semiconductor materials are the most widely used photocatalysts in recent decades [11,12].…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure, Spectroscopy and Photocatalytic Properties of a Co(II) Complex Based on 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic Acid

et al. 2020

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A novel cobalt(II) complex, namely [Co(tpa) 2 (H 2 O) 4 ]·2H 2 O (1) (Htpa = 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic acid) has been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 was further characterized by elemental analysis, FTIR spectrum, electronic spectrum, X-ray powder diffraction and thermal gravimetric analysis. Structural analysis shows that complex 1 was stabilized via π···π stacking and hydrogen bonding interactions to give a 3D supramolecular framework. Hirshfeld surface analysis showed that O···H (29.5%), H···H (23.8%), N···H (21.5%) and π···π (8.6%) intermolecular contacts are the most important interactions in the crystal of 1. In addition, the synthesized Co(II) complex showed favorable photocatalytic activity for the degradation of methyl orange (MO) under UV light at room temperature. The degradation process of MO was in accordance with the first-order reaction kinetics, and the t 1/2 for the reaction is 27.3 min, and the apparent rate constant is k = 2.54 × 10 −2 min −1 .

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Section: Introductionmentioning

confidence: 99%

Crystal Structure, Spectroscopy and Photocatalytic Properties of a Co(II) Complex Based on 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic Acid

et al. 2020

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“…111 When urea was replaced with melamine, crystallized GCN/ZnO were observed using a single stage annealing step (500 °C, 2 h). 115 The absence of carbon doping and the GCN decomposition was observed with a slight increment in the annealing temperature at the first (550 °C) and second stages (500 °C), respectively. 116 It was proposed that small molecules of urea can diffuse into the ZIF-8 structure, and melamine can be deposited over the surface of ZIF-8.…”

Section: Simultaneous Crystallization Of Gcn and Znomentioning

confidence: 95%

“…For instance, amorphous-GCN/C-ZnO was obtained after annealing the urea coated ZIF-8 at two different stages (500 °C, 2 h and 450 °C, 1–9 h) . When urea was replaced with melamine, crystallized GCN/ZnO were observed using a single stage annealing step (500 °C, 2 h) . The absence of carbon doping and the GCN decomposition was observed with a slight increment in the annealing temperature at the first (550 °C) and second stages (500 °C), respectively .…”

Section: Preparation Of the Compositementioning

confidence: 99%

Review and Perspective on Rational Design and Interface Engineering of g-C₃N₄/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

Kumar¹,

Kavitha²,

Manjunatha³

2023

Energy Fuels

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Heterostructuring the g-C 3 N 4 (GCN) with wide gap oxide photocatalysts is of prominent interest as they can harvest photons spanning the UV−visible region. In this regard, GCN/ZnO have garnered remarkable attention due to their admirable structure, optical, dimensional anisotropy, and electronic properties. The 2D sheet-like structure of GCN can serve as a suitable substrate for the growth of distinct ZnO nanostructures under the multitude of reaction conditions. This review focuses on the progress in the rational design and interface engineering of GCN/ZnO to from Type-II and Z/S-scheme heterojunctions, followed by their relevant photocatalytic applications toward H 2 evolution, CO 2 reduction, pollutant degradation, and bacteria inactivation. The mechanism underlying the crystallization of GCN and ZnO together with their intimate contact in the composite are emphasized under the light of diverse preparation methods. The modification of GCN/ZnO with cocatalysts such as metals, alloy, semiconductors, and carbon materials to form ternary systems to highlight their advancements. The gap analysis and future prospectus of this intricate heterostructure concerning the challenges in synthetic approaches and the charge carrier dynamics are discussed. This review envisages the development of efficient GCN/ZnO-based heterostructures for multiscale applications.

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“…In situ nitrogen doping is mainly achieved by selecting nitrogen sources and carbon sources as precursors and subjecting them to high-temperature pyrolysis or hydrothermal carbonization in an inert atmosphere, where nitrogen atoms are introduced directly into carbon skeletons during the pyrolysis process. Hence, the in situ doped nitrogen presents mainly in the states of skeletal N. As reported, many academics have synthesized a range of in situ N-doped carbon materials via the high-temperature pyrolysis process using melamine and ZIFs as precursors. − Liu et al synthesized bamboo-like CNTs via the pyrolysis using melamine as a carbon and nitrogen source. Zhong et al successfully prepared a variety of in situ N-doped carbon materials by carbonizing ZIF-8 with melamine, urea, xylitol, or sucrose at 950 °C.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Performances of a Versatile Nitrogen-Doped Carbon Skeleton Material Derived from a Humate-CoFe-ZIF/Melamine Precursor

Yuan

Cong

et al. 2022

ACS Appl. Electron. Mater.

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Humic acid (HA), melamine, and ZIFs are superior precursors for preparing carbon materials. Especially, metal ions in ZIFs are excellent nanocatalysts for synthesizing CNTs or graphene, while melamine and ZIFs are good dopants for fabricating nitrogen-doped carbon materials. Here, nitrogendoped carbon skeletal materials (NCS) assembled by a large number of bamboo-like CNTs and a small number of graphene layers were elaborately synthesized by a two-step pyrolysis process using a humate-CoFe-ZIF (HA-CoFe-ZIF) composite material as the template and melamine as the carbon and nitrogen source. NCS-II exhibits desirable supercapacitive characteristics and superior support performance due to a harmoniously assembled graphitic structure, favorite nitrogen incorporation mainly including pyridinic N and pyrrolic N at a high dosage of 5.24 wt %, abundant mesoporous structure, and large specific surface. As a supercapacitor electrode material, NCS-II demonstrates a high electrochemical capacitance (324 F g −1 at 1 A g −1 ), wide operating current density range (1−50 A g −1 ), and rate capability (64% from 5 A g −1 to 50 A g −1 ). And the prepared NCS-II//AC asymmetric supercapacitor also displays a large specific capacitance (129 F g −1 at 1 A g −1 ), good cycling stability (96% at 5 A g −1 for 10 000 cycles), and high energy density (25.6 Wh kg −1 at 600 W kg −1 ). As a catalyst support, the NCS-II provides plentiful active sites and a large specific surface area for the highly dispersed loading of PtCo nanoparticles. The prepared 1:1-PtCo/NCS-II catalyst exhibits high catalytic activity, good cycling stability, and strong CO tolerance ability for methanol oxidation reaction (MOR). Its ECSA value, CV peak current density, and peak current retention after 500 CV turns are high, up to 265.7 m 2 g pt −1 , 850 mA mg Pt −1 , and 79%, respectively.

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Synthesis of C3N4-decorated ZnO and Ag/ZnO nanoparticles via calcination of ZIF-8 and melamine for photocatalytic removal of methyl orange

Cited by 9 publications

References 26 publications

Crystal Structure, Spectroscopy and Photocatalytic Properties of a Co(II) Complex Based on 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic Acid

Crystal Structure, Spectroscopy and Photocatalytic Properties of a Co(II) Complex Based on 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic Acid

Review and Perspective on Rational Design and Interface Engineering of g-C₃N₄/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

Synthesis and Electrochemical Performances of a Versatile Nitrogen-Doped Carbon Skeleton Material Derived from a Humate-CoFe-ZIF/Melamine Precursor

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Synthesis of C3N4-decorated ZnO and Ag/ZnO nanoparticles via calcination of ZIF-8 and melamine for photocatalytic removal of methyl orange

Cited by 9 publications

References 26 publications

Crystal Structure, Spectroscopy and Photocatalytic Properties of a Co(II) Complex Based on 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic Acid

Crystal Structure, Spectroscopy and Photocatalytic Properties of a Co(II) Complex Based on 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic Acid

Review and Perspective on Rational Design and Interface Engineering of g-C3N4/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

Synthesis and Electrochemical Performances of a Versatile Nitrogen-Doped Carbon Skeleton Material Derived from a Humate-CoFe-ZIF/Melamine Precursor

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Review and Perspective on Rational Design and Interface Engineering of g-C₃N₄/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications