Revisiting the physiochemical properties of Hematite (α-Fe2O3) nanoparticle and exploring its bio-environmental application

Sharma, Pratibha; Dhiman, Shikha; Kumari, Sujata; Rawat, Pooja; Srivastava, Chandramohan; Sato, Hiroki; Akitsu, Takashiro; Kumar, Shalendra; Hassan, Md. Imtaiyaz; Majumder, Sudip

doi:10.1088/2053-1591/ab30ef

Cited by 21 publications

(8 citation statements)

References 52 publications

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“…The XRD pattern of raw iron turnings showed metallic Fe without any oxides while LB demonstrated α-Fe 2 O 3 without metallic iron/other oxides or sulphide/ sulphate forms of Fe indicating purity. This is also in accordance with the recent XRD studies on α-Fe 2 O 3 wherein higher crystallinity and greater particle size was observed at higher annealing temperature (700°) [30] .…”

Section: Sesame Oil (N=8)supporting

confidence: 92%

“…Therefore, the differences in the magnetization and coercivity values could be due to the difference in the particle size. Though hematite is a very weak ferromagnetic material, a relatively larger magnetization observed in our case could be attributed to the incineration at higher temperatures [30] . In addition, the effect of anions (Cl -, SO 2 4 -, NO 3 -) acting as structure and surface directing agents in the synthesis of different shaped and larger particle sized red coloured α-Fe 2 O 3 nanoparticles might throw light on the optical and magnetic properties of LB as reported in chemical synthesis of α-Fe 2 O 3 [31] .…”

Section: Sesame Oil (N=8)mentioning

confidence: 45%

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Pharmaceutical Standardization of Traditionally Prepared Lauha Bhasma Incinerated Iron, Characterised as Alpha Haematite

Chavan,

Bhuvad,

Walunj

et al. 2024

IJPS

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Standardization of Incinerated Iron (Lauha Bhasma) as Alpha HaematiteLauha Bhasma being incinerated metals, minerals and animal products attributed with specific therapeutic value needs standardization. Present study validates the pharmaceutical process of Lauha Bhasma/incinerated iron and characterizes it using traditional as well as modern techniques. Lauha Bhasma was prepared by traditional method. Pure iron turnings were sequentially quenched, 7 times each, into liquid media (1:4 w/v, for each) viz., sesame oil, cow's butter milk, cow's urine, sour gruel, Dolichus biflorus seed decoction and decoction of equally mixed pericarp of three myrobalans (Triphala). It was further mixed with sulphur, triturated with Aloe barbadensis leaf pulp and incinerated at 650°-850°, till the achievement of desired characters. The obtained reddish-violet powder contained 60 %-65 % of iron while characterized as crystalline ferric oxide, alpha haematite, on X-ray diffraction simulation. Vibrating sample magnetometer revealed hysteresis with less magnetisation saturation but high coercivity. Thermo-gravimetric analysis showed loss of ~3.5 % w/w between 300°-900°. Both, scanning and transmission electron microscopy visualised variably sized agglomerates of spherical to irregularly shaped particles with smooth edges. Dynamic light scattering analysis illustrated distribution of agglomerates as <250 nm (10 %), <515 nm (50 %) and <1050 nm (90 %) while negative zeta potential upto 14 mV. Elemental assay depicted heavy metals within permissible range and presence of trace elements up-to 2.75 %. Such Lauha Bhasma, characterized as alpha haematite, is traditionally prescribed in blood, liver, intestine and eye disorders. This study will help to explore this micro-nanomedicine as a therapeutic agent using in vitro and in vivo mechanistic studies.

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Section: Sesame Oil (N=8)supporting

confidence: 92%

Section: Sesame Oil (N=8)mentioning

confidence: 45%

Pharmaceutical Standardization of Traditionally Prepared Lauha Bhasma Incinerated Iron, Characterised as Alpha Haematite

Chavan,

Bhuvad,

Walunj

et al. 2024

IJPS

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“…Many methods have been reported for the synthesis of transition metal oxide nanoparticles including co-precipitation, sol-gel method, flow injection, electrochemical, solvothermal, hydrothermal, microwave-assisted, and sonochemical. [15][16] etc., but for all of these methods the reaction time is generally too long and there is also wastage of energy. However, the most common challenge for all the synthesis methods is to get a homogenized distribution of particles having uniform shape and structure.…”

Section: Microwave-assisted Synthesis Of Metal Oxide Nanoparticlesmentioning

confidence: 99%

A Review on Microwave Assisted Synthesis of Transition Metal Oxides and their Potent Application as Supercapacitors

Sharma,

Parashar,

Ghosh

et al. 2023

ChemistrySelect

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Preparation of transition metal oxides and mixed metal oxides via a microwave‐assisted method that permits processes to be completed in a quicker reaction time with the formation of homogenous and well‐dispersed nanoparticles. Recently, due to the environmentally friendly nature of this technique, it has become an important approach to green chemistry. The major advantage of microwave‐assisted synthesis includes clean, fast, efficient, less time‐consuming, highly accelerated rate, high yield, and an economic method. In this review, we have discussed the process of microwave synthesis and also compared this with other synthetic methods. A discussion of transition metal oxides in groups was performed where we have discussed their synthetic route and reaction conditions along with the effect on morphology and other properties. Additionally, the application of transition metal oxides as supercapacitors was also discussed. Since then, researchers have gained a lot of interest in transition metal oxides as energy storage devices due to their low‐cost, energy efficient, long cycle life, and improved electrical, thermal, and chemical stability, variable oxidation states and excellent redox properties. However, they cannot meet the need for high‐performance energy devices due to their low conductivity.

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“…[23][24][25][26] Fe 2 O 3 has a narrow band gap and it is easier for visible light to excite the electron-hole pairs in its valence band (VB) (2.0-2.2 eV). [27] Aside from this pair, graphene and GO based nanocomposite play a dual role i. e. improved the degradation of effluents by radical mechanism and shuttling electrons, so the recombination problem may be reduced. [28] It is a 2D nanosheet, with outstanding electrical, [29] mechanical, [30] and thermal properties.…”

Section: Introductionmentioning

confidence: 99%

“…or by nanocomposites of activated carbon, CNT, graphene based TiO 2 hybrid [19–22] In recent years, it has been found that hematite (Fe 2 O 3 ), is the efficient metal oxide that improve the photocatalytic performance of TiO 2 [23–26] . Fe 2 O 3 has a narrow band gap and it is easier for visible light to excite the electron‐hole pairs in its valence band (VB) (2.0–2.2 eV) [27] . Aside from this pair, graphene and GO based nanocomposite play a dual role i. e. improved the degradation of effluents by radical mechanism and shuttling electrons, so the recombination problem may be reduced [28] .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Photocatalytic Degradation of Methylene Blue Dye Using Graphene Oxide Based Ternary Nanocomposite

Yadav,

Sharma,

Kumari

et al. 2023

ChemistrySelect

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The scarcity of pure water, as well as the growing water shortage, highlight the importance of finding an efficient material for wastewater treatment. Treating pollutants present in wastewater is a challenging task so several methods have been developed for the treatment of pollutants present in wastewater. Among all, utilizing graphene based nanocomposite as adsorbent is a good option and can be utilized efficiently for wastewater treatment. In this work graphene oxide (GO) based ternary nanocomposite was synthesized via the co‐precipitation method and utilized for the photocatalytic degradation of methylene blue (MB) dye. Powder X‐ray Diffraction (PXRD), Field Emission Scanning Electron Microscope (FESEM), Energy Dispersive Spectroscopy (EDS), High Resolution Transmission Electron Microscope (HRTEM), UV‐vis Diffuse Reflectance Spectra (DRS), Brunauer‐ Emmett & Teller (BET) method, and UV‐Vis spectroscopy were used to investigate the formation of GO‐TiO2‐Fe2O3 (GTF) nanocomposites and the effect of graphene oxide addition on the photophysical properties of the composite. XRD data confirmed the high crystallinity of the obtained ternary nanocomposite. HRTEM and FESEM instruments confirmed the shape and morphology of the GTF nanocomposite which were found to be spherical with an average particle size of 20–80 nm. The photocatalytic degradation of the ternary composite was examined using MB as a model dye. The efficiency of the GTF nanocomposite was examined and compared with GO‐TiO2‐Fe2O3‐GG (GTF‐GG) and GO. The degradation efficiency of GTF‐GG, GTF, and GO was found to be 89.82 %, 77.34 % and 58.15 % within 270 min respectively. The prepared nanocomposite may be a promising material for the photocatalytic degradation of dye effluent present in wastewater.

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Revisiting the physiochemical properties of Hematite (α-Fe₂O₃) nanoparticle and exploring its bio-environmental application

Cited by 21 publications

References 52 publications

Pharmaceutical Standardization of Traditionally Prepared Lauha Bhasma Incinerated Iron, Characterised as Alpha Haematite

Pharmaceutical Standardization of Traditionally Prepared Lauha Bhasma Incinerated Iron, Characterised as Alpha Haematite

A Review on Microwave Assisted Synthesis of Transition Metal Oxides and their Potent Application as Supercapacitors

Enhancement of Photocatalytic Degradation of Methylene Blue Dye Using Graphene Oxide Based Ternary Nanocomposite

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