Conducting PANI stimulated ZnO system for visible light photocatalytic degradation of coloured dyes

Saravanan, R.; Sacari, Elisban; Gracia, F.; Khan, Mohammad Mansoob; Mosquera, Edgar; Gupta, Vinod Kumar

doi:10.1016/j.molliq.2016.06.074

Cited by 638 publications

(147 citation statements)

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“…Metal oxides and modified metal oxides were used as catalysts in various applications, such as photocatalytic degradation reactions of industrial dyes Puna et al, 2014;Saravanan et al, 2016) as well as preparation of nanoparticles modified electrode for the determination of drugs (Devaraj et al, 2016). They were also used as solid base catalysts for synthesis of biodiesel.…”

Section: Introductionmentioning

confidence: 99%

Optimization of methyl esters production from non-edible oils using activated carbon supported potassium hydroxide as a solid base catalyst

Fadhil

Aziz

Altamer

2018

Arab Journal of Basic and Applied Sciences

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The present investigation reports transesterification of non-edible oils, waste cooking oil (WCO) and waste fish oil (WFO) with methanol using activated carbon supported potassium hydroxide (KOH) as a solid base catalyst. Activated carbon was prepared from polyethylene terephthalate waste and loaded with KOH by wet impregnation method to prepare KOH/AC solid base catalyst. X-ray diffraction and Scanning Electron Microscopy (SEM) were utilized to characterize the resulting solid base catalyst. Retention method was utilized to measure the specific surface area of the activated carbon and its derived solid base catalyst, while Hammett indicator method was followed to determine the basic strength of the prepared solid base catalyst. The prepared catalyst has granular and porous structures with a high basicity and a superior catalytic performance for the transesterification reaction. Transesterification reaction variables were arranged to obtain the best biodiesel yield. The highest methyl ester yield from WCO (88.12% w/w with an ester content of 96.68% w/w) was obtained by employing 3.5 wt.% KOH/AC catalyst, 9:1 methanol to oil molar ratio, 65 C reaction temperature, the reaction time of 180 min and the stirring rate of 600 rpm, while maximum methyl ester yield from WFO (92.66% w/w with 96.98% w/w ester content) was produced with 3.0 wt.% KOH/AC catalyst, 9:1 methanol to oil molar ratio at 65 C for 150 minutes of the reaction and 600 rpm. The prepared solid base catalyst was recoverable and thermally stable giving a yield of 70 wt.% after the 5th cycle. The fuel properties of the raw oils were significantly enhanced after transesterification with methanol in the presence of KOH/AC, and were in conformity with the ASTM D 6751 limits as well. Therefore, the prepared KOH/AC composite may be considered as a promising solid base catalyst for transesterification of non-edible oils with methanol. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Optimization of methyl esters production from non-edible oils using activated carbon supported potassium hydroxide as a solid base catalyst

Fadhil

Aziz

Altamer

2018

Arab Journal of Basic and Applied Sciences

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“…But, with the historic discovery of first synthetic dye, Mauveine, most of the uses of natural dyes have been replaced with synthetic ones as they can be manufactured on a large scale (Gordon and Gregory 1987). At present, more than 1,00,000 synthetic dyes exist with an annual production of over 7 9 10 5 tonnes/year and are mostly associated with water pollution (Mittal et al 2009;Gupta et al 2011;Saravanan et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Malachite green “a cationic dye” and its removal from aqueous solution by adsorption

2016

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Adsorption can be efficiently employed for the removal of various toxic dyes from water and wastewater. In this article, the authors reviewed variety of adsorbents used by various researchers for the removal of malachite green (MG) dye from an aqueous environment. The main motto of this review article was to assemble the scattered available information of adsorbents used for the removal of MG to enlighten their wide potential. In addition to this, various optimal experimental conditions (solution pH, equilibrium contact time, amount of adsorbent and temperature) as well as adsorption isotherms, kinetics and thermodynamics data of different adsorbents towards MG were also analyzed and tabulated. Finally, it was concluded that the agricultural solid wastes and biosorbents such as biopolymers and biomass adsorbents have demonstrated outstanding adsorption capabilities for removal of MG dye.

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“…The presence of the hydroxyl group may form an acceptor level just above the valence band, favoring the photocatalytic activity. Also, the incorporation of TiO 2 nanoparticles in the LDPE could accelerate the photo-oxidation mechanism due to that TiO 2 can be excited at λ exc ≤ 400 nm to produce • OH radicals (see Figure 6) [39][40][41][42]. In addition, the increased relative surface area in TiO 2 (90)/LDPE sample results in increased surface contact between the water molecules adsorbed on the material and the photocatalyst, allowing thus the production of chemisorbed surface hydroxyl groups to produce • OH radicals.…”

Section: Evaluation Of Photocatalytic Activitymentioning

confidence: 99%

Notable photocatalytic activity of TiO2-polyethylene nanocomposites for visible light degradation of organic pollutants

Romero‐Sáez¹,

Jaramillo²,

Saravanan³

et al. 2017

Express Polym. Lett.

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Conducting PANI stimulated ZnO system for visible light photocatalytic degradation of coloured dyes

Cited by 638 publications

References 35 publications

Optimization of methyl esters production from non-edible oils using activated carbon supported potassium hydroxide as a solid base catalyst

Optimization of methyl esters production from non-edible oils using activated carbon supported potassium hydroxide as a solid base catalyst

Malachite green “a cationic dye” and its removal from aqueous solution by adsorption

Notable photocatalytic activity of TiO2-polyethylene nanocomposites for visible light degradation of organic pollutants

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