Hematite nanopowder obtained from waste: Iron-removal sludge

Novoselova, L. Yu.

doi:10.1016/j.powtec.2015.10.020

Cited by 29 publications

(10 citation statements)

References 56 publications

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“…The type-IV isotherm was caused by the capillary condensation in the mesopores networks of the Sp-HNP, while the H3-type hysteresis loop was attributed to slit-shaped pores. The results were consistent with those of other works producing HNPs from biomaterials templates [ 46 , 47 ]. As can be seen, the H3-type hysteresis loop appeared in the high-pressure region at a relative pressure higher than 0.6.…”

Section: Resultssupporting

confidence: 93%

Additive-Free Rice Starch-Assisted Synthesis of Spherical Nanostructured Hematite for Degradation of Dye Contaminant

et al. 2018

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Nanostructured hematite materials for advanced applications are conventionally prepared with the presence of additives, tainting its purity with remnants of copolymer surfactants, active chelating molecules, stabilizing agents, or co-precipitating salts. Thus, preparing nanostructured hematite via additive-free and green synthesis methods remains a huge hurdle. This study presents an environmentally friendly and facile synthesis of spherical nanostructured hematite (Sp-HNP) using rice starch-assisted synthesis. The physicochemical properties of the Sp-HNP were investigated by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (DR UV-Vis), and nitrogen adsorption–desorption analysis. The Sp-HNP showed a well-crystallized structure of pure rhombohedral phase, having a spherical-shaped morphology from 24 to 48 nm, and a surface area of 20.04 m2/g. Moreover, the Sp-HNP exhibited enhanced photocatalytic degradation of methylene blue dye, owing to the large surface-to-volume ratio. The current work has provided a sustainable synthesis route to produce spherical nanostructured hematite without the use of any hazardous agents or toxic additives, in agreement with the principles of green chemistry for the degradation of dye contaminant.

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Section: Resultssupporting

confidence: 93%

Additive-Free Rice Starch-Assisted Synthesis of Spherical Nanostructured Hematite for Degradation of Dye Contaminant

et al. 2018

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“…The diffractograms were compared with ICSD standard patterns and all the Bragg peaks of the particles were identified as single phase, with hexagonal (rhombohedral) structure of α-Fe 2 O 3 belonging to the R–3c space group. These results are consistent with previously reported studies on α-Fe 2 O 3 [15,16]. Moreover, the identicalness in crystal structure between the milled particles (ICSD: 98-009-4106) and the unmilled particles (ICSD: 98-002-2616) essentially suggests that the α-Fe 2 O 3 did not transform to Fe 3 O 4 during the high-energy ball milling since no other phases were identified.…”

Section: Resultssupporting

confidence: 92%

Complex Permittivity and Microwave Absorption Properties of OPEFB Fiber–Polycaprolactone Composites Filled with Recycled Hematite (α-Fe2O3) Nanoparticles

et al. 2019

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Recycled hematite (α-Fe2O3) nanoparticles with enhanced complex permittivity properties have been incorporated as a filler in a polycaprolactone (PCL) matrix reinforced with oil palm empty fruit bunch (OPEFB) fiber for microwave absorption applications. The complex permittivity values were improved by reducing the particle sizes to the nano scale via high-energy ball milling for 12 h. A total of 5–20 wt.% recycled α-Fe2O3/OPEFB/PCL nanocomposites were examined for their complex permittivity and microwave absorption properties via the open ended coaxial (OEC) technique and the transmission/reflection line measurement using a microstrip connected to a two-port vector network analyzer. The microstructural analysis of the samples included X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared spectroscopy (FTIR). At 1 GHz, the real (ε′) and imaginary (ε″) parts of complex permittivity of recycled α-Fe2O3 particles, respectively, increased from 7.88 to 12.75 and 0.14 to 0.40 when the particle size was reduced from 1.73 μm to 16.2 nm. A minimum reflection loss of −24.2 dB was achieved by the 20 wt.% nanocomposite at 2.4 GHz. Recycled α-Fe2O3 nanoparticles are effective fillers for microwave absorbing polymer-based composites in 1–4 GHz range applications.

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“…complex (Hossain et al, 2017;Kim and Park, 2002;Novoselova, 2016;Ou et al, 2009;Rahman et al, 2010;Stevenson and Fitch, 1986;Zhou et al, 2015). These studies have used different ferric solution and organic compounds to analyse the Fe-O bond.…”

Section: /39mentioning

confidence: 99%

Evaluation of the Effects of Chemically Enhanced Primary Treatment on Landfill Leachate and Sewage Co-treatment in Publicly Owned Treatment Works

Patel

Brazil²,

Lou

et al. 2020

Preprint

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The objective of this study was to evaluate the effects of CEPT for leachate and sewage co-treatment in a POTW. The results showed that ferric and aluminum coagulants remove about 54 - 74% organic matter where ferric performed better than aluminum coagulant. However, ferric coagulant was found to exacerbate the UV absorbance after coagulation at high dose due to the interaction with dissolved organic matter by forming soluble transition metal complexes. These organo-metal complexes have been found to increase the UV absorbance and this study provides the scientific background for such phenomenon.<br>

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Hematite nanopowder obtained from waste: Iron-removal sludge

Cited by 29 publications

References 56 publications

Additive-Free Rice Starch-Assisted Synthesis of Spherical Nanostructured Hematite for Degradation of Dye Contaminant

Additive-Free Rice Starch-Assisted Synthesis of Spherical Nanostructured Hematite for Degradation of Dye Contaminant

Complex Permittivity and Microwave Absorption Properties of OPEFB Fiber–Polycaprolactone Composites Filled with Recycled Hematite (α-Fe2O3) Nanoparticles

Evaluation of the Effects of Chemically Enhanced Primary Treatment on Landfill Leachate and Sewage Co-treatment in Publicly Owned Treatment Works

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