An efficient fabrication of ZnO–carbon nanocomposites with enhanced photocatalytic activity and superior photostability

Babar, Santosh B.; Gavade, N. L.; Bhopate, Dhanaji P.; Kadam, Abhijit N.; Kokane, Sanjay B.; Sartale, Shrikrishna D.; Gophane, Anna; Garadkar, K. M.; Bhuse, Vijaykumar M.

doi:10.1007/s10854-018-0382-5

Cited by 28 publications

(11 citation statements)

References 49 publications

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“…The Ag leaching ratios were determined to be 4.26% and 14.5% after one and five cycles. Meanwhile, the photocatalytic efficiency of the sample against CR reduced only by 8.6% after 5 recycles (Figure d), which indicates the good stability of Ag–ZnO SRA …”

Section: Results and Discussionmentioning

confidence: 94%

“…Meanwhile, the photocatalytic efficiency of the sample against CR reduced only by 8.6% after 5 recycles (Figure 6d), which indicates the good stability of Ag−ZnO SRA. 58 Total organic carbon (TOC) analysis was carried out in order to evaluate the effectiveness of CR mineralization catalyzed by Ag−ZnO SRA, as shown in Figure S2. TOC 0 stands for the total organic carbon concentration of untreated CR.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Ag–ZnO Submicrometer Rod Arrays for High-Efficiency Photocatalytic Degradation of Congo Red and Disinfection

Liu

Feng

et al. 2019

ACS Sustainable Chem. Eng.

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Ordered nanostructures are drawing a tremendous amount of attention for their potential applications in many fields. Herein, Ag–ZnO submicrometer arrays (SRA) were synthesized by a new polycarbonate membrane (PCM)-assisted electrochemical deposition method for photocatalytic degradation of Congo Red (CR) and disinfection. Ag–ZnO SRA were characterized by field emission electron microscopy, X-ray diffraction patterns, X-ray photoelectron spectroscopy, steady-state surface photovoltage spectroscopy, and UV–vis spectrophotometry. Their photocatalytic degradation performance was investigated by the degradation of CR solution under a Xe lamp, and they were also used to carry out experiments of the antibacterial effect of E. coli. The Ag modification in ZnO SRA enhances the degradation of CR, as it suppresses the recombination of e – and h + and broadens the adsorption band from the UV region to visible light. Ag–ZnO SRA prepared in 0.25 M Ag+ concentration exhibit the highest photocatalytic degradation efficiency (91.9%) and largest reaction constant k with excellent stability. The Ag–ZnO SRA may find potential in organic pollutant treatment.

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Section: Results and Discussionmentioning

confidence: 94%

Section: ■ Results and Discussionmentioning

confidence: 99%

Ag–ZnO Submicrometer Rod Arrays for High-Efficiency Photocatalytic Degradation of Congo Red and Disinfection

Liu

Feng

et al. 2019

ACS Sustainable Chem. Eng.

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“…In general, lower PL intensity results in a higher degree of charge separation. 67 Figure 8a presents the PL spectra of the CMPs. Notably, the TPP-Py CMP exhibited the lowest PL intensity, indicating that the recombination of electrons and holes was effectively suppressed relative to that of the other polymers.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The photoluminescence (PL) is closely related to the recombination of photoexcited electron–hole pairs. In general, lower PL intensity results in a higher degree of charge separation Figure a presents the PL spectra of the CMPs.…”

Section: Resultsmentioning

confidence: 99%

Tunable Pyridyl-Based Conjugated Microporous Polymers for Visible Light-Driven Hydrogen Evolution

Kotp

Elewa

EL‐Mahdy

et al. 2021

ACS Appl. Energy Mater.

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Conjugated microporous polymers (CMPs) are promising light harvesters for photocatalytic H 2 evolution because they are simple to prepare with various band gaps. To achieve CMPs displaying high photocatalytic performance, appropriate building blocks must be chosen. We prepared four kinds of triphenylpyridine-based CMPs (TPP-CMPs) through reactions with multibrominated monomers having different geometries [1,3,6,, tris(4-bromophenyl)amine (TPA-3Br), 2,4,6-tris(4-bromrophenyl)pyridine (TPP-3Br), and 1,2,4,5-tetrabromobenzene (BZ-4Br), forming the TPP-pyrene (Py), TPP-triphenylamine (TPA), TPP-TPP, and TPP-benzene (BZ) CMPs, respectively]. This strategy allowed effective synthetic regulation of electron enrichment, porosities, and optoelectronic properties of the TPP-CMPs. The surface areas of the TPP-CMPs were high, up to 1370 m 2 g −1 , and had a high thermal stability. TPP-Py CMP displayed the highest photocatalytic performance with a H 2 production rate of 18 100 μmol g −1 h −1 under irradiation with visible light. Moreover, we achieved apparent quantum yields as high as 22.97% at 420 nm, comparable with those of most other CMPs reported previously.

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“…Conventional methods for the removal of organic dyes include biological method, chemical precipitation, electrodialysis, ultrafiltration, and ion exchange methods, among others. − However, the application of these methods is restricted because of various disadvantages, such as low removal efficiencies and high costs. To overcome these limitations, new adsorbents with abundant adsorption sites and excellent physical and chemical stabilities for the effective and efficient adsorption of pollutants must be developed.…”

Section: Introductionmentioning

confidence: 99%

Cage-Based Covalent Organic Framework for the Effective and Efficient Removal of Malachite Green from Wastewater

Pan

et al. 2022

ACS Appl. Mater. Interfaces

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A cage-covalent organic framework (COF)-TP {T = bis(tetraoxacalix[2]arene[2]triazine); P = piperazine}, a novel two-dimensional covalent organic skeleton substituted with a nucleophilic cyanuric chloride analogue, was synthesized by a simple polymerization process. Cage-COF-TP is advantageous owing to its good structural order, permanent porosity, and low preparation cost. This skeleton was employed as a cost-effective adsorbent for the intermittent adsorption of an organic dye from aqueous solutions. Adsorption experiments were carried out at different initial dye concentrations, contact times, and solution pH. The adsorption kinetics followed the pseudo-second order model, and the results of thermodynamic studies were consistent with the Langmuir isotherm model. The high degree of matching between the size and shape of malachite green (MG) and the shrunken channels present in Cage-COF-TP were responsible for the enhanced adsorption ability of this material. Furthermore, theoretical calculations indicated that the high adsorption of the studied adsorbent can be attributed to the presence of nitrogen-rich triazine units in the Cage-COF-TP, which are expected to strengthen its affinity to guest molecules. The obtained results showed that the developed adsorbent is an efficient adsorbent that is theoretically capable of stimulating the removal of ∼2000 mg/g MG from wastewater at ambient temperature. This study will therefore be expected to promote the development of new functional materials based on COFs.

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An efficient fabrication of ZnO–carbon nanocomposites with enhanced photocatalytic activity and superior photostability

Cited by 28 publications

References 49 publications

Ag–ZnO Submicrometer Rod Arrays for High-Efficiency Photocatalytic Degradation of Congo Red and Disinfection

Ag–ZnO Submicrometer Rod Arrays for High-Efficiency Photocatalytic Degradation of Congo Red and Disinfection

Tunable Pyridyl-Based Conjugated Microporous Polymers for Visible Light-Driven Hydrogen Evolution

Cage-Based Covalent Organic Framework for the Effective and Efficient Removal of Malachite Green from Wastewater

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