Photocatalytic degradation of malachite green dye using Au/NaNbO3 nanoparticles

Baeissa, E.S.

doi:10.1016/j.jallcom.2016.02.024

Cited by 68 publications

(17 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By extrapolating the linear portion of the Tauc plot to zero, a bandgap value of approximately 3.34 eV is obtained ( Figure 10). is bandgap is comparable to the values of the bandgap of NaNbO 3 reported in the literature, for the nanostructured NaNbO 3 bandgaps produced from Nb 2 O 5 , demonstrating that the initial source does not influence the bandgap obtained [5,8,18]. is bandgap value shows its potential application as a photocatalyst activated in UV range.…”

Section: Advances In Materials Science and Engineeringsupporting

confidence: 82%

See 1 more Smart Citation

Effect of Synthesis Conditions on Crystal Morphology and Layer Thickness of Nanostructured Sodium Niobate Supported on Metallic Substrate

Canabarro

Jardim

2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Sodium niobate presents numerous interesting properties for technological application and can be produced in nanometric structures if synthesized by alkali hydrothermal route. Although the influence of synthesis conditions on the product morphology and crystal structure has been well explored for niobates synthesized from the powder of niobium oxide, the synthesis on metallic niobium platelets is not completely understood. Therefore, the present study seeks to correlate the synthesis’ variables, of alkali hydrothermal route, to morphology and thickness of sodium niobate nanowire layer supported on niobium platelets. An experimental design was planned to evaluate whether temperature, alkali solution concentration, and reactional duration influence on the produced materials. The morphology of 1D niobates produced was investigated by scanning, while crystal structure was analyzed by X-ray diffraction. The cross sections of 1D sodium niobate layers were cut with a focused ion beam, and their thickness was quantified by scanning electron microscopy images. It was concluded that all chosen variables influenced the thickness of the sodium niobate layer, and a model describing the layer thickness with the chosen variables was proposed. A morphology change from nanowires at the mildest synthesis conditions to nanoribbons at the most severe ones was observed (see Supplementary Material for graphical abstract).

show abstract

Section: Advances In Materials Science and Engineeringsupporting

confidence: 82%

“…e hydrothermal synthesis' method has shown promise in manufacturing niobates, both from niobium oxides [1,6,11,12,[16][17][18][19] and from the metallic niobium [4,15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Synthesis Conditions on Crystal Morphology and Layer Thickness of Nanostructured Sodium Niobate Supported on Metallic Substrate

Canabarro

Jardim

2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…The rate of decolorization was monitored spectrophotometrically. The effect of different process parameters such as pH (2)(3)(4)(5)(6)(7)(8)(9), initial concentration of dye (5-50 ppm) and amount of catalyst (0.5-1.5 gL -1 ) on degradation of the dye was also observed. It was reported that maximum degradation of dye occurred in acidic range with TiO2 and at neutral pH with ZnO.…”

Section: Introductionmentioning

confidence: 99%

“…Nanocube structure of sodium niobite was prepared by Baeissa [7] using a hydrothermal method. These nanocubes were doped with gold by impregnation with an aqueous solution of HAuCl4.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Malachite Green using Undoped and Carbon-Doped Calcium Molybdate Catalysts

Shre¹,

Bhatt²,

Rathore³

et al. 2021

J. Adv. Chem. Sci.

View full text Add to dashboard Cite

Calcium molybdates (undoped and carbon-doped) have been used as a photocatalyst for the degradation of malachite green. These have been characterized by different techniques such as FE-SEM, EDX and XRD. The progress of the reaction has been monitored spectrophotometrically. Different rate affecting parameters like pH, concentration of dye, amount of semiconductor and light intensity have been studied and their optimum values obtained are pH 9.7, concentration of malachite green as 5.00 × 10-4 M, 0.12 g of CaMoO4 and light intensity as 50.0 mWcm–2. A tentative mechanism for the photocatalytic degradation of dye has been proposed, where hydroxyl radical has been observed as an active oxidizing species.

show abstract

“…A literature survey shows that degradation efficiency of CIP has been investigated via HPLC 1 and TLC (Krzek et al, 2005). UV and UV/H2O2 by multiple-wavelength ultraviolet light-emitting diodes (Ou et al, 2016), Photo catalytic synthesized with TiO2 nanoparticles on montmorillonite (Hassani et al, 2015), UV/H2O2 (Baeissa, 2016), photo-Fenton Homogenous (Bobu et al, 2015, Sonolysis (De Bel et al, 2009), and adsorption processes (Jiang et al, 2009). Particularly, Fenton Homogenous processes have been used as one of the best methods to control and reduce organic pollutions, whereby inexpensive and environmentally friendly reagents are employed (Biglarijoo et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Optimization of degradation of ciprofloxacin antibiotic and assessment of degradation products using full factorial experimental design by Fenton Homogenous process

Rakhshandehroo

Salari

Nikoo

2018

Global NEST Journal

View full text Add to dashboard Cite

The Pharmaceutical contaminants specialist antibiotics into environment can create problems for both human health and environment. Ciprofloxacin (CIP), an antibiotic Fluoroquinolones group, has recently been used widely for infections treatment. The main purpose of the research was to develop a Full factorial method for degradation of CIP in aqueous solution by Fenton Homogenous process (Fe2+/H2O2). In order to compare the effects of the four parameters considered in the optimization of the oxidative process, a two level Full factorial experimental design (24) was utilized using JMP® software. These parameters were concentration of CIP ( ), concentration of Fe2+ ( ), concentration of H2O2 ( ) and time ( ) at ambient temperature and an acidic pH. In the optimal conditions of the initial concentration of CIP 80 mg/l, Fe2+ concentration of 5 mM, and H2O2 concentration of 51.2 mM degradation efficiency of CIP was 76% within 15 min. Under these conditions, the highest correlation coefficient proved between observed and predicted degradation efficiencies with R2= 0.996 and Adj-R2= 0.968. The reaction intermediates have been identified by LC-MS and BOD5/COD ratio for study biodegradability enhanced from zero to 0.32, showed that the Fenton Homogenous process was agreeable to biological treatment. Based on the results, this may be concluded that Fenton Homogenous process by Full factorial experimental design could be used to degrade CIP from aqueous solutions efficiently.

show abstract

Photocatalytic degradation of malachite green dye using Au/NaNbO3 nanoparticles

Cited by 68 publications

References 28 publications

Effect of Synthesis Conditions on Crystal Morphology and Layer Thickness of Nanostructured Sodium Niobate Supported on Metallic Substrate

Effect of Synthesis Conditions on Crystal Morphology and Layer Thickness of Nanostructured Sodium Niobate Supported on Metallic Substrate

Photocatalytic Degradation of Malachite Green using Undoped and Carbon-Doped Calcium Molybdate Catalysts

Optimization of degradation of ciprofloxacin antibiotic and assessment of degradation products using full factorial experimental design by Fenton Homogenous process

Contact Info

Product

Resources

About