Effect of calcination temperature on optical, magnetic and dielectric properties of Sol-Gel synthesized Ni0.2Mg0.8-xZnxFe2O4 (x = 0.0–0.8)

Sagar, T. Vidya; Rao, T. Srinivasa; Naidu, K. Chandra Babu

doi:10.1016/j.ceramint.2020.01.178

Cited by 49 publications

(4 citation statements)

References 66 publications

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“…This almost disappearance of the magnetic properties of the MZF component confirms the core-shell behavior discussed before in XRD and FT-IR results. It was reported that the concentration of the non-magnetic cations at the B-site could lead to a low magnetic moment, and subsequently low magnetization [42]. However, here, the complete coating of MZF by the non-magnetic PPy matrix causes the magnetic characteristics of MZF to vanish.…”

Section: Magnetic Propertiesmentioning

confidence: 72%

Synthesis, Characterization and Dye Removal Capability of Conducting Polypyrrole/Mn0.8Zn0.2Fe2O4/Graphite Oxide Ternary Composites

et al. 2022

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Herein, ternary composites from polypyrrole (PPy), Mn0.8Zn0.2Fe2O4 (MZF), and graphite oxide (GO) were prepared to remove acid red dye (AR1) from wastewater. MZF was synthesized using spent Zn–C batteries, acid leaching, and sucrose auto-combustion processes; GO was prepared via oxidation and exfoliation of graphite. The composites were prepared by adding MZF and GO during the in-situ polymerization of pyrrole. Different PPy/MZF/GO (PMG) composites were prepared by changing the weight ratios of the PPy, MZF, and GO. We investigated the prepared composites’ structural, magnetic, and electrical/dielectric properties. We evaluated different experimental conditions’ influences on dye removal performance, such as pH, dosage, dye concentration, temperature, and contact time. XRD, FT-IR, and magnetic properties indicated that PPy completely coated the other contents. The electrical/dielectric properties improved while increasing the GO ratio. The PMG at GO content 50 wt.% (PMG50) showed the most efficient ratio for better removing AR1 from wastewater.

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Section: Magnetic Propertiesmentioning

confidence: 72%

Synthesis, Characterization and Dye Removal Capability of Conducting Polypyrrole/Mn0.8Zn0.2Fe2O4/Graphite Oxide Ternary Composites

et al. 2022

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“…This phenomenon occurred because the microwave absorbency of absorbers is reduced when the temperature reaches a certain level. 37 In temperature region IV, the pyrolysis temperature was stable and the final pyrolysis temperature with the Fe 2 O 3 /BC absorber (700 °C) was the highest. The dielectric parameters of the absorber increased initially and then decreased with the increment in temperature; thus, the microwave absorbency of the absorber changed in the four temperature regions.…”

Section: Resultsmentioning

confidence: 95%

“…All of the pyrolysis temperatures with and without the absorbers gradually decreased after reaching the highest temperature. This phenomenon occurred because the microwave absorbency of absorbers is reduced when the temperature reaches a certain level . In temperature region IV, the pyrolysis temperature was stable and the final pyrolysis temperature with the Fe 2 O 3 /BC absorber (700 °C) was the highest.…”

Section: Resultsmentioning

confidence: 99%

Novel Approach for Enhanced Catalytic Microwave Pyrolysis of Low-Rank Coal

Zhou

Yang

et al. 2020

Energy Fuels

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Microwave pyrolysis technology used for the efficient and clean conversion of low-rank coal is of concern in this study. An efficient and cheap Fe 2 O 3 /bluecoke (Fe 2 O 3 /BC) absorber with a wrapped structure was prepared by the hydrothermal synthesis method using ferric nitrate nonahydrate (iron source), sodium hydroxide (precipitation agent), and CTAB (protective agent), and the effects of BC, Fe 2 O 3 , and Fe 2 O 3 /BC absorbers on microwave pyrolysis of low-rank coal were investigated through some analytic methods, such as scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), and gas chromatography−mass spectrometry (GC−MS). The pyrolysis temperature, yields, and characteristics of pyrolysis products (bluecoke, pyrolysis water, tar, and coal gas) were examined and compared to verify the effect of the Fe 2 O 3 /BC absorber. Results showed that the temperature increment rate was improved by these absorbers, and the highest temperature increment rate was obtained with the Fe 2 O 3 /BC absorber, followed by Fe 2 O 3 and BC absorbers. The yield of the liquid product (pyrolysis water and tar) obtained with the Fe 2 O 3 /BC absorber was the highest, arriving at 14.31 wt %, in which the yield and carbon content of tar were 6.54 and 20.40 wt %, respectively. The characteristics of the products indicated that all of these absorbers enhanced the catalytic cracking reactions of coal, but Fe 2 O 3 /BC performed the best among the studied absorbers. A synergistic effect that promoted liquefaction and inhibited coal gasification was exerted by Fe 2 O 3 and BC, and it may have been caused by the composite component and wrapped structure of the Fe 2 O 3 /BC absorber.

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“…We get from all samples that belong to the multidomain type. Based on the Mr/Ms value below 0.5, all of them show multi-domain results [54][55][56][57]. Magnetic remanent around 0.0001 -0.004 emu/gr, while magnetic saturation around 0.071 -0.176 emu/gr, and Magnetic Coercivity about 10.969 -115.278 Oe.…”

Section: Vibrating Sample Magnetometer (Vsm)mentioning

confidence: 96%

Identification Morphology and Magnetic Properties Sedimentary Elements Between Fossils and Outcrops Around the Lusi River: A Case Study of Central Java, Indonesia

Putra,

Akmal,

Legowo

et al. 2023

Trends Sci

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Lusi River flows in the middle of Grobogan Regency with a length of 234 km and an area of 3,656.78 km2. The warp river has many very diverse ends. One of them is the discovery of deer fossils estimated to be around 30,000 years ago and stored in the Pleistocene layer. There may be still many fossils stored in this layer that have never been studied. It is estimated that 80 % of fossils are incomplete because there are teeth attached to the fossils and the condition of the jaws is still neatly arranged. We get the magnetic susceptibility value around 1.3×10−8 - 37.8×10−8 m3/kg. Vibrating Sample Magnetometer confirm that value of magnetic saturation about 0.071 - 0.176 emu/gr, magnetic remanent about 0.0001 - 0.004 emu/gr, and magnetic coercivity around 10.969 - 115.278 Oe. X-Ray Diffractometer confirm the mineral is Calcite (CaCO3) and Quartz (SiO2). From the results we got, it can be confirmed that the fossils found at the bottom of the Lusi river have the same minerals and elements as environmental sediments. So, fossils can be said to have been sedimented over a long period of time in the Lusi River. HIGHLIGHTS We have some important things in this study: Lusi river is a place we found fossil Lusi river we found a poor magnetic mineral We get the magnetic properties of the transition from paramagnetic to diamagnetic GRAPHICAL ABSTRACT

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Effect of calcination temperature on optical, magnetic and dielectric properties of Sol-Gel synthesized Ni0.2Mg0.8-xZnxFe2O4 (x = 0.0–0.8)

Cited by 49 publications

References 66 publications

Synthesis, Characterization and Dye Removal Capability of Conducting Polypyrrole/Mn0.8Zn0.2Fe2O4/Graphite Oxide Ternary Composites

Synthesis, Characterization and Dye Removal Capability of Conducting Polypyrrole/Mn0.8Zn0.2Fe2O4/Graphite Oxide Ternary Composites

Novel Approach for Enhanced Catalytic Microwave Pyrolysis of Low-Rank Coal

Identification Morphology and Magnetic Properties Sedimentary Elements Between Fossils and Outcrops Around the Lusi River: A Case Study of Central Java, Indonesia

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