Graphene quantum dots functionalised with rhamnolipid produced from bioconversion of palm kernel oil by <i>Pseudomonas stutzeri</i> BK-AB12MT as a photocatalyst

Habibah, Fera Faridatul; Ivansyah, Atthar Luqman; Ivan, Samuel; Hertadi, Rukman

doi:10.1039/d2ra05967c

Cited by 5 publications

(4 citation statements)

References 51 publications

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“…This interaction leads to better stability of the monorhamnolipids at the decane-water interface than the free monorhamnolipids, changing the behavior of the monorhamnolipid phase from the Winsor type II to Winsor type III. This behavior was also shown in a lab experiment by Habibah et al, 2020 [8]. [2].…”

Section: Stability Of the Monorhamnolipid And The Complex At Water-oi...supporting

confidence: 76%

“…However, based on the results of other studies, rhamnolipids can only reduce IFT of the n-octane-water system up to ~0.1 mN/m at pH 5, temperature 75 °C, and 2% NaCl [7]. The ultra-low IFT is not achieved due to rhamnolipids having a better affinity with non-polar compounds such as oil and tend to form emulsions in the oil layer (Winsor type II) [8].…”

Section: Introductionmentioning

confidence: 98%

“…One way to increase the reduction of IFT while changing the type of rhamnolipid emulsion formation to Winsor type III is by using nanoparticles [8]. Nanoparticles can affect wettability, increase the ratio of fluid mobility, control the formation of fluid migration, and change the solution's rheological properties, thereby increasing the effect of surfactant on the EOR [9].…”

Section: Introductionmentioning

confidence: 99%

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Potential Application of Rhamnolipid-Silica Nanoparticle Complex for Enhanced Oil Recovery Studied with Molecular DynamicsSimulations

Fitri

Ivansyah

Hertadi

2022

MSF

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Biosurfactants are used as a solution to the use of synthetic surfactants in Enhance Oil Recovery (EOR) process which are not safe for environment. One of the requirements for biosurfactants in EOR is having the ability to reduce the value of the interfacial tension (IFT) to a minimum of 10-3 mN/m. To meet the requirement, the performance of biosurfactants can be improved by having it interact strongly with nanosized support material. In this study, the stability of the free monorhamnolipids (without silica) and the monorhamnolipids-silica nanoparticle complexes at the decane-water interface at 300 K was studied by in silico method. Component density analysis shows that monorhamnolipids and monorhamnolipids-silica nanoparticle complexes diffuse to the decane-water interface. Trajectory analysis of the simulation boxes showed that the complexes were more stable at the decane-water interface. Based on the interaction analysis of the hydrophilic groups as well as hydrogen bonding, the complexes stability on the interface is caused by the strong hydrogen interaction between monorhamnolipids and silica that have more stable properties at the decane-water interface. This causes the complexes are more effective in reducing the IFT of decane and water with a decrease of up to 1.6 mN/m.

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Section: Stability Of the Monorhamnolipid And The Complex At Water-oi...supporting

confidence: 76%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Potential Application of Rhamnolipid-Silica Nanoparticle Complex for Enhanced Oil Recovery Studied with Molecular DynamicsSimulations

Fitri

Ivansyah

Hertadi

2022

MSF

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“…GQDs have remarkable quantum properties, which is why they have been studied in biological imaging, lightemitting diodes, photoelectrocatalysis, drug carrier sensors, and pollutant absorption. [13][14][15][16][17] One of the most attractive features of GQDs is their abundance as carbon materials, which can be equipped with functional groups at their edges. This feature makes them more desirable than mineral QDs.…”

Section: Introductionmentioning

confidence: 99%

Graphene quantum dots: synthesis, characterization, and application in wastewater treatment: a review

Gozali Balkanloo,

Mohammad Sharifi,

Poursattar Marjani

2023

Mater. Adv.

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Harmonizing rhamnolipid biosurfactant production by halophilic Pseudomonas aeruginosa Pa84 by applying response surface methodology

Sharma,

Gautam,

Joshi

et al. 2024

J Surfact & Detergents

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Biosurfactants are gaining attention due to their biobased nature, including reduced toxicity and enhanced biocompatibility. This research work investigates the characteristics of the biosurfactant extracted from the halophilic strain Pa84 of Pseudomonas aeruginosa and optimizes its production using a statistical model. The identity of biosurfactant from P. aeruginosa strain Pa84 as rhamnolipid was determined by comparing the genomic sequences of strain Pa84 with high‐yielding strains of P. aeruginosa that produce rhamnolipid, through Fourier transform infrared and liquid chromatography‐mass spectrometer analyses, and by the presence of rhlA, rhlB, and rhlC genes in the genome of strain Pa84 that are responsible for the production of rhamnolipid. A methodical strategy using a time‐course assessment and statistical software optimized the production of rhamnolipids. After optimization using central composite design‐response surface methodology, the medium composition of 3.34 g/L of NH4Cl, 1.03 g/L of NaCl, and 4 g/L of glycerol were chosen, yielding 7.48 ± 0.0217 g/L of biosurfactant. These findings will help in the development of effective and sustainable bioprocess that produce rhamnolipid biosurfactants, for use in a variety of sectors.

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Graphene quantum dots functionalised with rhamnolipid produced from bioconversion of palm kernel oil by Pseudomonas stutzeri BK-AB12MT as a photocatalyst

Abstract: Schematic reaction of photodegradation of methylene blue by RL-GQDs.

Cited by 5 publications

References 51 publications

Potential Application of Rhamnolipid-Silica Nanoparticle Complex for Enhanced Oil Recovery Studied with Molecular DynamicsSimulations

Potential Application of Rhamnolipid-Silica Nanoparticle Complex for Enhanced Oil Recovery Studied with Molecular DynamicsSimulations

Graphene quantum dots: synthesis, characterization, and application in wastewater treatment: a review

Harmonizing rhamnolipid biosurfactant production by halophilic Pseudomonas aeruginosa Pa84 by applying response surface methodology

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