Experimental design for optimization of 4-nitrophenol reduction by green synthesized CeO2/g-C3N4/Ag catalyst using response surface methodology

Pinheiro, Dephan; Devi, K.R. Sunaja; Jose, Ajay; Karthik, K.; Sugunan, S.; Mohan, Mothi Krishna

doi:10.1016/j.jre.2019.10.001

Cited by 23 publications

(6 citation statements)

References 28 publications

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“…On the basis of these statistical analyses, it was conclusive that the predicted model was adequate for predicting the acetal yield within the respective range of the variables studied. [49][50][51][52][53] A linear curve for the normal distribution of the residue (Figure 5b) provided additional support to the validity of the predicted model. A random distribution was observed for the correlation of internally residuals vs. predicted BEGA yield (Figure 5c), indicating that the original observed values were independent with the predicted response by which the applicability of the quadratic regression model in Equation ( 1) was further justified.…”

Section: Chemistry-a European Journalmentioning

confidence: 61%

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Transition Metal‐Promoted Carbon‐Silicon Solid Acid Catalysts for the Synthesis and Process Optimization of Benzaldehyde Glycol Acetal

Han

Yang

Chen

et al. 2023

Chemistry A European J

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A series of transition metal (M)-promoted carbonsilicon (CÀ MÀ Si; M = Mn, Fe, Co, Ni, Cu, Zn, Zr) solid acid catalysts with designated molar ratio of M/Si = 1 : 8 were fabricated and exploited for acetalization of benzaldehyde (BzH) with ethylene glycol (EG). The physical and chemical properties of these CÀ MÀ Si catalysts prepared by sol-gel method were characterized by various techniques, namely, SEM, EDS, TGA-DTG, BET, XRD, FTIR, XPS, and NH 3 -TPD. Among various examined acidic CÀ MÀ Si catalysts, the CÀ FeÀ Si catalyst exhibited the optimal catalytic activity with the benzaldehyde glycol acetal (BEGA) yield of 97.67 %, in excellent agreement with the value (97.88 %) predicted by the response surface methodology (RSM) based on a Box-Behnken design (BBD). CÀ FeÀ Si catalyst with the high catalytic activities and excellent stability and reusability may be ascribed to the suitable acidity and uniform surface distribution of active sites requisite for the acid-catalyzed acetalization reaction.

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Section: Chemistry-a European Journalmentioning

confidence: 61%

“…Whilst, the non‐significant ‘Lack of fit’ value (0.7968) so observed implying that model was well fitted to all data. On the basis of these statistical analyses, it was conclusive that the predicted model was adequate for predicting the acetal yield within the respective range of the variables studied [49–53] …”

Section: Resultsmentioning

confidence: 86%

Transition Metal‐Promoted Carbon‐Silicon Solid Acid Catalysts for the Synthesis and Process Optimization of Benzaldehyde Glycol Acetal

Han

Yang

Chen

et al. 2023

Chemistry A European J

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“…The photocatalytic degradation of MO using Gd 2 O 3 -ZIF-8 nanocomposites is optimized by a four-factor and three-level BBD design consisting of 27 sets of experimental data for the optimization reactions, including replication at the center point [25,36]. Four independent variables, namely the initial pH (X 1 ), catalyst dose (X 2 ), MO concentration (X 3 ), and H 2 O 2 concentration (X 4 ), were assessed.…”

Section: Box-behnken Design With Response Surface Methodology (Rsm)mentioning

confidence: 99%

“…112), (022), (013), (222), and (114) planes of the sodalite structure (JCPDS 00-062-1030) [23,24]. The crystallite size of the Gd 2 O 3 nanowires in the synthesized Gd 2 O 3 -ZIF-8 nanocomposites was calculated using the Scherrer formula [25,26].…”

Section: Introductionmentioning

confidence: 99%

Ultrasound Assisted Synthesis of Gadolinium Oxide-Zeolitic Imidazolate Framework-8 Nanocomposites and Their Optimization for Photocatalytic Degradation of Methyl Orange Using Response Surface Methodology

Jeon

2021

Catalysts

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An ultrasound-assisted method was used to prepare gadolinium oxide (Gd2O3)-zeolitic imidazolate framework (ZIF)-8 nanocomposites. The surface morphology, particle size, and properties of the Gd2O3-ZIF-8 nanocomposites were examined using scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, and ultraviolet-visible (UV-vis) spectroscopy. The synthesized Gd2O3-ZIF-8 nanocomposites were used as a catalyst to degrade methyl orange (MO) under UV light irradiation at 254 nm. The color of the aqueous MO dye solution during photocatalytic degradation was examined using color spectroscopy. Response surface methodology (RSM) using a four-factor Box-Behnken design (BBD) was used to design the experiments and optimize the photocatalytic degradation of MO. The significance of the experimental factors and their interactions were determined using analysis of variance (ANOVA). The efficiency of Gd2O3-ZIF-8 nanocomposites for the photocatalytic degradation of MO reached 98.05% within 40 min under UV irradiation at 254 nm under the experimental conditions of pH 3.3, 0.4 g/L catalyst dose, 0.0630 mM MO concentration, and 431.79 mg/L H2O2 concentration. The kinetics study showed that the MO photocatalytic degradation followed a pseudo-first-order reaction rate law.

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“…Besides, copper is used as a charge separation center for hydrogen evolution, MO, and phenol solution degradation under visible light [350,351]. In addition to Cu, the noble metal Ag and Au is another metal catalyst used besides the g-C 3 N 4 -based composite [347,[352][353][354][355][356]. The Ag and Au can prevent rapid recombination probability, improve the transfer of a generated electron, and enhance the visible light absorption by the surface plasmon resonance, and can be used for a wide range of applications, especially decontamination of organic pollutants.…”

Section: Other Metal Oxidesmentioning

confidence: 99%

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

2022

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g-C3N4 has drawn lots of attention due to its photocatalytic activity, low-cost and facile synthesis, and interesting layered structure. However, to improve some of the properties of g-C3N4, such as photochemical stability, electrical band structure, and to decrease charge recombination rate, and towards effective light-harvesting, g-C3N4–metal oxide-based heterojunctions have been introduced. In this review, we initially discussed the preparation, modification, and physical properties of the g-C3N4 and then, we discussed the combination of g-C3N4 with various metal oxides such as TiO2, ZnO, FeO, Fe2O3, Fe3O4, WO3, SnO, SnO2, etc. We summarized some of their characteristic properties of these heterojunctions, their optical features, photocatalytic performance, and electrical band edge positions. This review covers recent advances, including applications in water splitting, CO2 reduction, and photodegradation of organic pollutants, sensors, bacterial disinfection, and supercapacitors. We show that metal oxides can improve the efficiency of the bare g-C3N4 to make the composites suitable for a wide range of applications. Finally, this review provides some perspectives, limitations, and challenges in investigation of g-C3N4–metal-oxide-based heterojunctions.

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Experimental design for optimization of 4-nitrophenol reduction by green synthesized CeO2/g-C3N4/Ag catalyst using response surface methodology

Cited by 23 publications

References 28 publications

Transition Metal‐Promoted Carbon‐Silicon Solid Acid Catalysts for the Synthesis and Process Optimization of Benzaldehyde Glycol Acetal

Transition Metal‐Promoted Carbon‐Silicon Solid Acid Catalysts for the Synthesis and Process Optimization of Benzaldehyde Glycol Acetal

Ultrasound Assisted Synthesis of Gadolinium Oxide-Zeolitic Imidazolate Framework-8 Nanocomposites and Their Optimization for Photocatalytic Degradation of Methyl Orange Using Response Surface Methodology

A Comprehensive Review of Graphitic Carbon Nitride (g-C3N4)–Metal Oxide-Based Nanocomposites: Potential for Photocatalysis and Sensing

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