Synthesis and characterisation of stable and efficient nano zero valent iron

Badmus, Kassim Olasunkanmi; Coetsee, E.; Swart, H.C.; Petrik, Leslie

doi:10.1007/s11356-018-2119-7

Cited by 32 publications

(23 citation statements)

References 53 publications

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“…The theoretical view of the current investigation was governed by the possibility of creating donor-acceptor pairs on the surface of an intrinsic TiO 2 to achieve optimum reduced band-gap as well as to prevent recombination of the charge carriers. The instability of zero valent nano iron (nZVI) was reported in one of our previous publications [24]. nZVI could produce the required oxygen vacant surface for absorption in the visible spectrum of electromagnetic radiation by the TiO 2 .…”

Section: Introductionmentioning

confidence: 86%

Synthesis of Oxygen Deficient TiO2 for Improved Photocatalytic Efficiency in Solar Radiation

et al. 2021

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The photocatalytic activities of TiO2 have been limited mainly to absorbing in the ultraviolet spectrum which accounts for only 5% of solar radiation. High energy band gap and electron recombination in TiO2 nanoparticles are responsible for its limitations as a photocatalyst. An oxygen deficient surface can be artificially created on the titanium oxide by zero valent nano iron through the donation of its excess electrons. A visible light active TiO2 nanoparticle was synthesized in the current investigation through simple chemical reduction using sodium boro-hydride. The physical and textural properties of the synthesized oxygen deficient TiO2 photocatalyst was measured using scanning/ transmission electron microscopy while FTIR, XRD and nitrogen sorption methods (BET) were employed for its further characterizations. Photochemical decoloration of orange II sodium dye solution in the presence of the synthesized TiO2 was measured using an UV spectrophotometer. The resulting oxygen deficient TiO2 has a lower energy band-gap, smaller pore sizes, and enhanced photo-catalytic properties. The decoloration (88%) of orange (II) sodium salt solution (pH 2) under simulated solar light was possible at 20 min. This study highlights the effect of surface oxygen defects, crystal size and energy band-gap on the photo-catalytical property of TiO2 nanoparticles as impacted by nano zero valent iron. It opens a new window in the exploitation of instability in the dopant ions for creation of a visible light active TiO2 photocatalyst.

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Section: Introductionmentioning

confidence: 86%

Synthesis of Oxygen Deficient TiO2 for Improved Photocatalytic Efficiency in Solar Radiation

et al. 2021

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“…Developing an efficient antioxidant therapy for sepsis by scavenging ROS or targeting the antioxidant systems is imperative. Fe-based biocatalysts may represent an efficient antioxidant therapy for sepsis due to its great electronegativity and large specific surface area [ 35 ]. The standard electrode potential E0 [Fe(II)/Fe(0)] of nanoFe is − 0.44 V, which has strong reducibility and can be used as an antioxidant to play the role of electron donor, thereby transferring electrons to water or oxidizing substances.…”

Section: Discussionmentioning

confidence: 99%

Protection of zero-valent iron nanoparticles against sepsis and septic heart failure

Wang

Liang

et al. 2022

J Nanobiotechnol

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Background Septic heart failure accounts for high mortality rates globally. With a strong reducing capacity, zero-valent iron nanoparticles (nanoFe) have been applied in many fields. However, the precise roles and mechanisms of nanoFe in septic cardiomyopathy remain unknown. Results NanoFe was prepared via the liquid-phase reduction method and functionalized with the biocompatible polymer sodium carboxymethylcellulose (CMC). We then successfully constructed a mouse model of septic myocardial injury by challenging with cecal ligation and puncture (CLP). Our findings demonstrated that nanoFe has a significant protective effect on CLP-induced septic myocardial injury. This may be achieved by attenuating inflammation and oxidative stress, improving mitochondrial function, regulating endoplasmic reticulum stress, and activating the AMPK pathway. The RNA-seq results supported the role of nanoFe treatment in regulating a transcriptional profile consistent with its role in response to sepsis. Conclusions The results provide a theoretical basis for the application strategy and combination of nanoFe in sepsis and septic myocardial injury. Graphical Abstract

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“…Similarly, the oxidation of ZINPs in moist air due to instability and absence of surface protection resulted in the emergence of peaks at ≈23° attributed to ɣ-FeOOH (Lepidrocite) phase with JCPDS No. 17-0536 (Badmus et al, 2018). Diffraction peaks at 2θ values of ≈20° and ≈40° indicate the presence of FeOOH (Ebrahiminezhad et al, 2018).…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Fabrication and response optimization of Moringa oleifera-functionalized nanosorbents for the removal of diesel range organics from contaminated water

Ubah

Dashti

Saaid

et al. 2022

Environ Sci Pollut Res

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The purpose of this research is to synthesize environmentally friendly nanosorbents capable of Diesel Range Organics (DRO) adsorption from contaminated water. Central Composite Design (CCD) analysis of response surface methodology (RSM) was employed in a model fitting of the variables predicting the adsorption efficiency of Moringa Oleifera-functionalized zerovalent iron particles (ZINPs) for the removal of DRO. The effects of the reaction parameters on the response were screened using 2 4 factorial design to determine the statistically significant independent variables. A quadratic model predicting the DRO adsorption efficiency of ZINPs with an F-value of 276.84 (p-value <0.0001) was developed. Diagnostic plots show that the predicted values were in excellent agreement with actual experimental values (R 2 = 0.99). The maximum percentage removal of DRO of 92.6% was achieved after optimization, using the synthesized ZINPs after 8 hours of contact between DRO substrates and ZINPs at pH of 8, the temperature of 25 ºC, with an adsorbent dosage of 2 g/L and at composite desirability of 1. Characterization of ZINPs revealed the formation of quasi nanospheres and nanocubes with an average particle diameter of 50.9 ± 9.7, the crystallite size of 15.31 nm, a crystallinity index of 32.47%, and pore width of 75.69 -88.59 nm. The adsorption equilibrium data modelling of ZINPs for adsorption of DRO was best described by Langmuir isotherm with the maximum monolayer coverage capacity of 7.194 mg/g. The separation factor 𝑅 𝐿 = 0.472, indicated favourable adsorption. The adsorption kinetic data were consistent with pseudo-second-order kinetics indicating probable chemisorption.

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Synthesis and characterisation of stable and efficient nano zero valent iron

Cited by 32 publications

References 53 publications

Synthesis of Oxygen Deficient TiO2 for Improved Photocatalytic Efficiency in Solar Radiation

Synthesis of Oxygen Deficient TiO2 for Improved Photocatalytic Efficiency in Solar Radiation

Protection of zero-valent iron nanoparticles against sepsis and septic heart failure

Fabrication and response optimization of Moringa oleifera-functionalized nanosorbents for the removal of diesel range organics from contaminated water

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