Influence of Synthetic Polymer on Aqueous Anionic Surfactant (SDBS) Micelle Investigated by FT-IR and Ultrasonic Study

Geetha, D.; Thilagavathi, T.; Ramesh, P.; Rakkappan, C.

doi:10.1163/092764410x490662

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…Apparent molar volume is one of the important thermodynamic properties which are more helpful in understanding the solute-solvent, solute-solute and solvent-solvent interactions present in the medium. From the survey of literature, it can be seen that most of the apparent molar volume and ultrasonic studies in surfactant solutions are confined only to aqueous surfactants [8,9], surfactants dissolved in aqueous-alcoholic [10,11] and organic mixed solvents [12]. Apparent molar volume and ultrasonic studies on bile salts in mixed solvents are scandy.…”

Section: Introductionmentioning

confidence: 99%

Apparent molar volume and ultrasonic studies on some bile salts in water–aprotic solvent mixtures

Ravichandran¹,

Lakshiminarayanan

Ragouramane³

2013

Fluid Phase Equilibria

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Section: Introductionmentioning

confidence: 99%

Apparent molar volume and ultrasonic studies on some bile salts in water–aprotic solvent mixtures

Ravichandran¹,

Lakshiminarayanan

Ragouramane³

2013

Fluid Phase Equilibria

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“…The improvised approach of the synthesis of the Eu‐doped ZnO@GO was used, which might follow the below mentioned growth route. [ 33 ]

…”

Section: Resultsmentioning

confidence: 99%

P–N Heterojunction System Eu‐Doped ZnO@GO for Photocatalytic Water Splitting

Gurbani

Chouhan

2023

Global Challenges

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202200106graphene, created by vigorously oxidizing graphite [4][5][6] and is thought of as a single sheet of graphene that is retaining different oxygen-containing groups on both sides of the basal plane as well as on the edges. [7] Due to the creation of sp 3 hybridized C-atoms, which interfere with the π-conjugation in the graphene sheet, GO functions differently from pure graphene and acting as an insulator or shows the p-type semiconducting behavior. [8][9][10] It has been shown that the conduction band (CB) minimum of GO is composed of π* orbitals, which have a higher energy level than that needed for hydrogen generation. Graphene and graphene-based materials are currently being used vigorously for energy conversion applications, including the solar hydrogen generation from water splitting. [11,12] There have been numerous attempts to improve the photocatalytic performance of semiconductor photocatalysts by integrating graphene with them for various applications. [13][14][15][16][17][18] ZnO is an inexpensive, wide-bandgap semiconductor with a bandgap of 3.37 eV, which corresponds to a wavelength of about 375 nm. Its high photoreactivity, good photostability, and low cost favor its use in photocatalytic water splitting (PWS), but its limitations include photocorrosion, backward reaction, poor stability, and inability to absorb visible light. [19] To get around these problems, modifications have been made like coupling with other semiconductors and doping with metal, rare-earth metal, or non-metal ions. [20][21][22][23] Recently, rare-earth metal-doped ZnO has caught the attention of material scientists in this direction because of its superior activity and selectivity to pure ZnO as well as its higher absorption efficiency in the visible region, which can be used to create better optoelectronic devices for harvesting visible light. The dopant causes competitive defects in the ZnO surface, bulk, and lattice. Due to their role in the bandgap contraction and the separation effect of the photocarriers (photoelectron (e − ) and photohole (h + )), these defects are wanted at the surface.The imperfectly filled 4f orbitals of rare-earth metals can trap electrons, reducing charge recombination and enhancing photocatalytic activity. [23] By interacting with 4f orbitals of lanthanoid ions with a variety of functional groups of GO, the light harvesting power of composite will enhanced. In comparison to pure TiO 2 , Khalid et al. studied the La/TiO 2graphene composites revealed higher visible light absorption and improved charge separation capability. Ahmad et al. [25] synthesized europium and terbium -doped ZnO photocatalyst and Here, a feather-like Eu-doped ZnO (particle size ≈ 34.87 µm and E g ≈ 3.13 eV) nanoassembly is synthesized by using the capping agent cetyltrimethylammonium bromide-supported hydrothermal method. The Eu-doped ZnO is loaded onto the graphene oxide (GO) surface as Eu-doped ZnO@GO (particle size ≈ 23.07 µm and E g ≈ 0.79 eV) and applied to measure the photocatalytic water splitting activity in 20% ...

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“…The PXRD pattern ( Figure 1a ) of synthesized ZnO NPs was in accordance with the literature in terms of peak positions and relative intensity [ 22 – 23 ]. The sharp diffraction peaks and primary strong angles indicated the good crystallinity of the prepared crystals [ 24 – 25 ]. Furthermore, the obtained patterns confirmed that no other contaminants were present in the PXRD pattern, specifying that the principal component at the inorganic phase of the sample was ZnO.…”

Section: Discussionmentioning

confidence: 99%

Assessing phytotoxicity and tolerance levels of ZnO nanoparticles on Raphanus sativus: implications for widespread adoptions

Samuditha,

Adassooriya,

Salim

2024

Beilstein J. Nanotechnol.

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The escalating release of zinc oxide nanoparticles (ZnO NPs) into the environment poses a substantial threat, potentially leading to increased concentrations of zinc (Zn) in the soil and subsequent phytotoxic effects. This study aimed to assess the effects of ZnO NPs on Raphanus sativus (R. sativus) concerning its tolerance levels, toxicity, and accumulation. ZnO NPs were synthesized by the wet chemical method and characterized by powder X-ray diffraction (PXRD), Fourier-transform infrared (FTIR) spectroscopy, ultraviolet–visible (UV–vis) spectroscopy, dynamic light scattering (DLS), and scanning electron microscopy (SEM). The effect of ZnO NPs (70 nm) on R. sativus grown in coir was evaluated. The application of 1,000 mg/L of ZnO NPs resulted in a significant increase (p < 0.05) in soluble protein content, carbohydrates, chlorophyll a (Chl-a), chlorophyll b (Chl-b), total chlorophylls, carotenoids, and antioxidants by 24.7%, 58.5%, 38.0%, 42.2%, 39.9%, 11.2%, and 7.7%, respectively. Interestingly, this dose had no impact on the indole acetic acid (IAA) content. Conversely, the use of 2,000 mg/L of ZnO NPs in the same medium led to a significant reduction (p < 0.05) in soluble protein content by 23.1%, accompanied by a notable increase in IAA by 31.1%, indicating potential toxicity. The use of atomic absorption spectroscopy confirmed the internalization of zinc in seedlings, with a statistically significant increase (p < 0.05). In control plants without ZnO NPs, Zn concentration was 0.36 mg/g, while at the highest ZnO NPs tested dose of 10,000 mg/L, it significantly rose to 1.76 mg/g, causing leaf chlorosis and stunted seedling growth. This suggests potential health risks related to Zn toxicity for consumers. Given the adverse effects on R. sativus at concentrations above 1000 mg/L, caution is advised in the application and release of ZnO NPs, highlighting the importance of responsible practices to mitigate harm to plant life and consumer health. The study demonstrated the tolerance of R. sativus to high Zn levels, classifying it as a Zn-tolerant species.

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Influence of Synthetic Polymer on Aqueous Anionic Surfactant (SDBS) Micelle Investigated by FT-IR and Ultrasonic Study

Cited by 6 publications

References 7 publications

Apparent molar volume and ultrasonic studies on some bile salts in water–aprotic solvent mixtures

Apparent molar volume and ultrasonic studies on some bile salts in water–aprotic solvent mixtures

P–N Heterojunction System Eu‐Doped ZnO@GO for Photocatalytic Water Splitting

Assessing phytotoxicity and tolerance levels of ZnO nanoparticles on Raphanus sativus: implications for widespread adoptions

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