Sonochemical Synthesis of Layered Copper Hydroxy Nitrate Nanosheets

Anandan, Sambandam; Wu, Jerry J.; Ashokkumar, Muthupandian

doi:10.1002/cphc.201500629

Cited by 31 publications

(10 citation statements)

References 29 publications

(63 reference statements)

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“…Thus, the development of an energy-saving process for completely removing phenol derivatives, particularly nonylphenol, from the wastewater is of great importance for environmental conservation. Since the pioneering work by Pelizzetti and co-workers, the degradation of nonylphenol and its derivatives using TiO 2 -based UV-light photocatalysts has been studied. − In view of the energy and environmental issue, effective utilization of sunlight as an energy source is desirable. Although several visible-light photocatalysts such as BiVO 4 and Ag-loaded BiVO 4 were used for the nonylphenol degradation, , these reactions require highly alkaline conditions.…”

Section: Introductionmentioning

confidence: 99%

Rapid and Complete Removal of Nonylphenol by Gold Nanoparticle/Rutile Titanium(IV) Oxide Plasmon Photocatalyst

et al. 2013

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Nonylphenol is a harmful endocrine disruptor, and the concentration in ambient water should be restricted below 0.1 μM. We show that visible-light irradiation of gold nanoparticle (NP)-loaded rutile TiO2 (Au/rutile TiO2) plasmon photocatalyst leads to rapid and complete removal of nonylphenol from its dilute aqueous solution with the degradation. Au/rutile TiO2 exhibits much higher visible-light activity than Au/anatase TiO2 and BiVO4. Based on the results of the adsorption and Fourier-transformed infrared spectroscopic measurements, we present a unique reaction scheme consisting of a series of events, the fast oxidative adsorption and concentration of nonylphenol on the Au NP surface, the successive efficient oxidation induced by the localized surface plasmon resonance excitation-driven interfacial electron transfer from Au NP to rutile TiO2, and the regeneration of the adsorption sites by the surface transport of the intermediates from Au to TiO2.

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Section: Introductionmentioning

confidence: 99%

Rapid and Complete Removal of Nonylphenol by Gold Nanoparticle/Rutile Titanium(IV) Oxide Plasmon Photocatalyst

et al. 2013

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“…Under our reaction conditions, chances are that other metal complexes can be formed. According to the literature, − the formation of hydroxynitrate metal intermediates is more likely to occur in the hydrothermal synthesis of metal oxides from their nitrate salts. These metal hydroxynitrates usually evolve at low temperatures (i.e., 100 °C < T < 300 °C) and fully convert to metals with a higher oxidation state at higher temperatures (e.g., 500 °C).…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Mesoporous Copper Aluminosilicate Hollow Spheres for Oxidation Reactions

Kosari

Seayad

et al. 2020

ACS Appl. Mater. Interfaces

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Hollow functional metal silicate materials have received the most interest due to their large inner space, permeable and functional shell, lighter density, and better use of material compared to their solid counterparts. While tremendous success has been made in the synthesis of individual metal silicates with uniform morphology, the synthesis of multiphase hollow silicates has not been explored yet, although their direct applications could be promising. In this study, mesoporous aluminosilicate spheres (MASS) are transformed to submicrometer copper aluminosilicate hollow spheres (CASHS) via a one-pot hydrothermal process. CASHS has a hollow interior with Cu−Al−Si thorn-like moieties in a lamellar structure on its outer shell. The structure and morphology of CASHS are unique and different from the previously reported tubular copper silicates that are emanated from Stober silica spheres. Herein, we also demonstrate that the extent of hollowing in CASHS can be attained by controlling the aluminum content of pristine MASS, highlighting the existence of parameters for in situ controlling the shell thickness of hollow materials. The application of CASHS as a potential heterogeneous catalyst has been directed to important oxidation processes such as olefin oxidation and the advanced oxidation process (AOP). In cyclohexene oxidation, for instance, high selectivity to cyclohex-2-en-1-one is achieved under moderate conditions using tert-butyl hydroperoxide as the oxidant. CASHS is a robust heterogeneous catalyst and recyclable for this reaction. CASHS-derived catalysts also favor AOP and enhance the removal of cationic dyes together with H 2 O 2 through an adsorption−degradation process.

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“…Recently, HyS has been a promising material for various applications, including adsorption, catalytic wet oxidation, and catalytic wet peroxide oxidation. Among them, copper hydroxy salt (Cu2(OH)3NO3, Cu-HyS) has been focused to be an environmentally friendly material to remove toxic pollutants in wastewater [2][3][4][5][6][7][8][9]. The Cu-HyS structure belongs to the P21 space group with z = 2; the crystal system is monoclinic with β = 94.619° and cell characteristics of a = 5:6005 Å, b = 6:0797 Å, and c = 6:9317 Å at 25 °C.…”

Section: Introductionmentioning

confidence: 99%

“…Cu-HyS nanoribbons were explored by Yu et al by gently hydrolyzing Cu-HyS aqueous solution in the presence of ethanolamine at low temperatures [12]. Cu-HyS nanosheets were prepared by Wang et al using a sonochemical technique [6].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Hydrotalcite-like Copper Hydroxyl Salts as a Photocatalyst and Adsorbent for Hexavalent Chromium Removal

et al. 2022

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Cu-HyS-urea and Cu-HyS-NaOH, which are hydrotalcite-like copper hydroxyl salts, were prepared by two different methods, urea hydrolysis and precipitation, respectively. Both synthesis methods provided the successful formation of a copper hydroxyl salt, Cu2(OH)3NO3. From XRD and UV-DRS results, the product from the urea hydrolysis methods (Cu-HyS-urea) displayed higher crystallinity, small bandgap energy (Eg), and high light absorption ability because of some intercalated carbonate anions. For the Cr(VI) removal test, the Cu-HyS-NaOH showed superior adsorption of Cr(VI) than Cu-HyS-urea due to a higher specific surface area, confirmed by BET analysis. However, the Cu-HyS-urea presented higher photocatalytic Cr(VI) reduction under light irradiation than Cu-HyS-NaOH, owing to narrow Eg, less recombination, and a high transfer of the photogenerated charge carriers, proven by the results from photoluminescence, photocurrent density, and electrochemical impedance spectroscopy. Thus, this work provides a new function of the hydrotalcite-like copper hydroxyl salts (Cu-HyS-urea and Cu-HyS-NaOH) that can be utilized not only for adsorption of Cr(VI) but also as photocatalysts for Cr(VI) reduction under light irradiation.

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Sonochemical Synthesis of Layered Copper Hydroxy Nitrate Nanosheets

Cited by 31 publications

References 29 publications

Rapid and Complete Removal of Nonylphenol by Gold Nanoparticle/Rutile Titanium(IV) Oxide Plasmon Photocatalyst

Rapid and Complete Removal of Nonylphenol by Gold Nanoparticle/Rutile Titanium(IV) Oxide Plasmon Photocatalyst

Synthesis of Mesoporous Copper Aluminosilicate Hollow Spheres for Oxidation Reactions

Fabrication of Hydrotalcite-like Copper Hydroxyl Salts as a Photocatalyst and Adsorbent for Hexavalent Chromium Removal

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