Superior photocatalytic, electrocatalytic, and self-cleaning applications of Fly ash supported ZnO nanorods

Thirumalai, K.; Balachandran, S.; Swaminathan, M.

doi:10.1016/j.matchemphys.2016.08.018

Cited by 38 publications

(9 citation statements)

References 40 publications

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“…The impact of the dosage amount was determined by adding different amounts (5−30 mg) of adsorbents (A-BFA and BFA−APTES) to the dye solutions at the pH optimal for adsorption. To study the effect of contact time, the dye content remained in the solution treated with the adsorbents at predetermined time intervals (5,10,15,20,25, and 30 min) was determined spectrophotometrically. The effect of temperature on the adsorption of dyes was studied by performing adsorption at different temperatures (298, 308, 318, 328, and 338 K).…”

Section: Methodsmentioning

confidence: 99%

“…Recent efforts for expanding the application profile of coal fly ash have revealed the potential of coal fly ash residues as functional materials for application in environmental remediation and catalysis. Several studies are available that highlight the efficiency of coal fly ash and materials derived from it (e.g., organocomposites and porous materials including zeolites, mesoporous silica) as adsorbents for removal of dyes, toxic metal ions, radioactive pollutants, organic pollutants such as benzene, toluene, and o - and p -xylene, gaseous pollutants such as CO 2 , H 2 S, and SO 2 as well as support material for catalysts, photocatalysts, and electrocatalysts. ,− Because of their distinct chemical nature, biomass ash residues do not show pozzolanic and cementitious properties; however, the potential of biomass ash as part of cement mortar − is widely investigated. Besides, the potential of biomass fly ash (BFA) for other applications is also being explored.…”

Section: Introductionmentioning

confidence: 99%

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Utilization of Biomass Fly Ash for Improving Quality of Organic Dye-Contaminated Water

et al. 2020

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Development of innovative methodologies to convert biomass ash into useful materials is essential to sustain the growing use of biomass for energy production. Herein, a simple chemical modification approach is employed to functionalize biomass fly ash (BFA) with 3-aminopropyltriethoxy silane (APTES) to develop an inexpensive and efficient adsorbent for water remediation. The amine-functionalized BFA (BFA−APTES) was fully characterized by employing a range of characterization techniques. Adsorption behavior of BFA−APTES was evaluated against two anionic dyes, namely, alizarin red S (ARS) and bromothymol blue (BTB). In the course of experimental data analysis, the computation tools of data fitting for linear and nonlinear form of Langmuir, Freundlich, and the modified Langmuir−Freundlich adsorption isotherms were used with the aid of Matlab R2019b. In order to highlight the misuse of linearization of adsorption models, the sum of the squares of residues (SSE) values obtained from nonlinear models are compared with R 2 values obtained from the linear regression. The accuracy of the data fitting was checked by the use of SSE as an error function instead of the coefficient of determination, R 2 . The dye adsorption capacity of BFA−APTES was also compared with the nonfunctionalized BFA. The maximum adsorption capacities of BFA−APTES for ARS and BTB dye molecules were calculated to be around 13.42 and 15.44 mg/g, respectively. This value is approximately 2−3 times higher than the pristine BFA. A reasonable agreement between the calculated and experimental values of q e obtained from the nonlinear form of kinetic models verified the importance of using equations in their original form. The experimentally calculated thermodynamic parameters including molar standard Gibbs free energy (Δ ad G m 0 ) and molar standard enthalpy change (Δ ad H m 0 ) reflected that the process of adsorption of dye molecules on the BFA−APTES adsorbent was spontaneous and exothermic in nature. Moreover, the used BFA−APTES adsorbent could be regenerated and reused for several cycles with significant dye adsorption capacity. The remediation capability of the BFA− APTES adsorbent against ARS dye was also demonstrated by packing a small column filled with the BFA−APTES adsorbent and passing a solution of ARS through it. Overall, we provide a simple and scalable route to convert BFA into an efficient adsorbent for water remediation applications.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Utilization of Biomass Fly Ash for Improving Quality of Organic Dye-Contaminated Water

et al. 2020

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“…The rapid current decay is due to the poisoning of intermediate and various poisoning species formed during methanol oxidation reaction in alkaline medium. 40,41 It is clear from the Fig. S7a † that the current decay for the reaction on the Dy 2 WO 6 -ZnO nanomaterial is signicantly less (4.8 mA to 2.64 mA) than that on the prepared ZnO (Fig.…”

Section: Electrochemical Methanol Oxidationmentioning

confidence: 97%

Hydrothermal fabrication of natural sun light active Dy₂WO₆ doped ZnO and its enhanced photo-electrocatalytic activity and self-cleaning properties

2017

Self Cite

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In this article we report the fabrication of 3 wt% Dy 2 WO 6 doped ZnO via a template-free hydrothermal process and its photocatalytic activity against azo dyes Rhodamine-B (Rh-B) and Trypan Blue (TB) in solar light irradiation.The as prepared Dy 2 WO 6 doped ZnO was characterised by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high resolution scanning electron microscopy (HR-SEM) field emission transmission electron microscopy (FE-TEM), X-ray photoelectron spectroscopy (XPS), diffused reflectance (DRS) and photoluminescence (PL) spectroscopy. The results suggested that rare earth tungstate doping, with Dy 2 WO 6 , on ZnO has a great influence on the photocatalytic activity. Dy 2 WO 6 -ZnO possesses high reusability without appreciable loss of catalytic activity up to four runs and exhibits higher electrocatalytic activity than the prepared ZnO for methanol electrooxidation in alkaline medium, revealing its promising potential as the anode catalyst in direct methanol fuel cells. Hydrophobicity of ZnO increases on doping with Dy 2 WO 6 .

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“…This can be overcame by various technologies such as doping of metals and not-metals into the semiconducting material, use the catalysts with nanodimension, coupling of two or more semiconductors, supporting the catalyst into supports, the use of plasmonic systems, etc. Detailed mechanism pathways for these technologies have been illustrated in the literature (Vafayi et al 2015;Palma et al 2020;Rostami-Vartooni et al 2019;Giahi et al 2016;Naderpour et al 2013;Pouretedal et al 2017;Derikvandi et al 2017;Bordbar et al 2015;Derikvandi et al 2020;Khodadadi et al 2016;Pouretedal et al 2016;Thirumalai et al 2016).…”

Section: Introductionmentioning

confidence: 99%

The photocatalytic rate of ZnO supported onto natural zeolite nanoparticles in the photodegradation of an aromatic amine

Iazdani

Nezamzadeh‐Ejhieh

2021

Environ Sci Pollut Res

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The ZnO supported on the ball-mill prepared clinoptilolite nanoparticles (CNPs) was prepared via an ionexchange process followed by the calcination process. The ZnO-CNP catalyst was brie y characterized by XRD, FTIR, and DRS techniques. The pHpzc value for the various ZnO-CNPs was about 7.1 that no changed with the ZnO loading. By applying the Scherrer equation on the XRD results, a nano-dimension was obtained for the catalyst. Band gap energy of the ZnO-CNP samples were estimated by applying the Kubelka-Munk equation on the DRS re ectance spectra. The supported ZnO-CNP sample was then used in the photodegradation of 2,4-dichloroaniline (DCA).The effects of the most important key operating factors on the degradation e ciency was kinetically studied by applying the Hinshelwood equation on the results. The ZnO-CNP catalyst with 2 w% ZnO showed the best photocatalytic rate in the optimal conditions of 0.75 g/L, C DCA : 15 ppm, and the initial pH: 5.8. Finally, HPLC analysis of the blank and the photodegraded DCA solutions at 180 and 300 min con rmed 74 and 87% of DCA molecules were degraded during these times.

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Superior photocatalytic, electrocatalytic, and self-cleaning applications of Fly ash supported ZnO nanorods

Cited by 38 publications

References 40 publications

Utilization of Biomass Fly Ash for Improving Quality of Organic Dye-Contaminated Water

Utilization of Biomass Fly Ash for Improving Quality of Organic Dye-Contaminated Water

Hydrothermal fabrication of natural sun light active Dy₂WO₆ doped ZnO and its enhanced photo-electrocatalytic activity and self-cleaning properties

The photocatalytic rate of ZnO supported onto natural zeolite nanoparticles in the photodegradation of an aromatic amine

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Superior photocatalytic, electrocatalytic, and self-cleaning applications of Fly ash supported ZnO nanorods

Cited by 38 publications

References 40 publications

Utilization of Biomass Fly Ash for Improving Quality of Organic Dye-Contaminated Water

Utilization of Biomass Fly Ash for Improving Quality of Organic Dye-Contaminated Water

Hydrothermal fabrication of natural sun light active Dy2WO6 doped ZnO and its enhanced photo-electrocatalytic activity and self-cleaning properties

The photocatalytic rate of ZnO supported onto natural zeolite nanoparticles in the photodegradation of an aromatic amine

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Hydrothermal fabrication of natural sun light active Dy₂WO₆ doped ZnO and its enhanced photo-electrocatalytic activity and self-cleaning properties