Chelating agents role on phase formation and surface morphology of single orthorhombic YMn2O5 nanorods via modified polyacrylamide gel route

Wang, Shifa; Zhang, Chuanfei; Sun, Guang; Chen, Bin; Xi, Xiang; Ding, Qing-Ping; Zu, Xihong

doi:10.1007/s11426-013-4961-2

Cited by 14 publications

(4 citation statements)

References 23 publications

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“…When excess La and Mn ions are added to the solution, LaMnO 3 nanoparticles are covered on the α-Al 2 O 3 surface to form large agglomerates. In the gel process, a small amount of acrylamide monomers and bisacrylamide are introduced into the solution, the growing polyacrylamide chains will be crosslinked through the bisacrylamide to grow into a complex web of interconnected loops and branches, resulting in the mobility of metal ions are further limited [17,20,21]. When the polymer is removed during calcination, the porous α-Al 2 O 3 inside citrate is decomposed during calcinations, resulting in the formation of fine particles.…”

Section: Resultsmentioning

confidence: 99%

“…Although the gel was dried at 120 ˚C, there was still some water in the xerogel. (2) From 242 ˚C to 450 ˚C, a weight loss of 40% was due to decomposition of micro-molecular organic compounds and glucose, and side-chain of polyacrylamide [21,24]. (3) The large weight loss of 48% in the temperature range of 450 ˚C -550 ˚C, an obvious exothermic peak at 535 ˚C was detected and could be attributed to the decomposition and combustion of polyacrylamide's backbone and other residues [24][25][26].…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Magnetic Properties of LaMnO3/α-Al2O3 Magnetic Nanocomposites

Wang

Sun

Ding

et al. 2014

AMR

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In this paper, LaMnO3/α-Al2O3magnetic nanocomposites were synthesized through using a soft-chemistry route. The synthesis strategy in this work is based on a soft-chemistry process using a polyacrylamide gel route in which citric acid is employed as the chelating agent. The composites were characterized by thermogravimetric and differential scanning calorimetry analyses, X-ray diffraction, scanning electron microscope, energy dispersive x-ray spectroscopy and vibrating sample magnetometer. Scanning electron microscope observation reveals that the content of α-alumina decreases with the increase of number of sample surface particle in the composites. Magnetic hysteresis loop measurement shows that the LaMnO3sample exhibit paramagnetism at room temperature. Interestingly, the weak ferromagnetism at room temperature was observed for a composition of 0.7 α-Al2O3/ 0.3 LaMnO3. The forming mechanisms and magnetic properties of α-Al2O3/ LaMnO3composites have been discussed based on the experimental results.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Synthesis and Magnetic Properties of LaMnO3/α-Al2O3 Magnetic Nanocomposites

Wang

Sun

Ding

et al. 2014

AMR

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“…These findings indicate that pyrogallol has greater advantages in controlling the morphology of GNRs than AA as a reductant. Although gold and nanorod nanomaterials have been widely investigated recently [36][37][38][39][40][41], this new method has great potential for preparing high-quality GNRs for a range of applications including sensing applications, plasmon-enhanced spectroscopy, and photothermal cancer therapies.…”

Section: Discussionmentioning

confidence: 99%

Size-tunable synthesis of gold nanorods using pyrogallol as a reducing agent

Huang

Xia

et al. 2015

Sci. China Chem.

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A novel and facile seed-mediated method for the preparation of monodispersed gold nanorods (GNRs) is presented by introducing pyrogallol as a reductant. Fast Fourier transformation of high-resolution transmission electron microscopy reveals that the synthesized GNRs are single crystalline. The longitudinal surface plasmon resonance of GNRs can be finely tuned by varying silver ion concentrations or seed amounts. Also, both thick (diameter >30 nm) and thin (diameter <10 nm) GNRs with exceptional monodispersity can be well prepared by this method. These findings indicate that this method has a greater performance in controlling the morphology of GNRs than that of traditional approach with ascorbic acid as a reductant. gold nanorods, seed-mediated, pyrogallol, size tunability

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“…Common perovskite manganese compounds with orthogonal structures are a kind of multiferroic material, such as TbMnO 3 , DyMnO 3 , and TbMn 2 O 5 [5][6][7][8][9][10]. The conventional approaches to the preparation of perovskite manganese compounds include the solid-state method [11], sol-gel method [12,13], polyacrylamide gel method [14][15][16][17], spark plasma sintering method [18], electrospinning method [19], and hydrothermal method [20,21]. The sol-gel method and the spark plasma sintering method require high-temperature calcination in the intermediate and final stages of synthesis, which may cause product agglomeration and make it difficult to control the reaction.…”

Section: Introductionmentioning

confidence: 99%

Rodlike YMn2O5 Powders Derived from Hydrothermal Process Using Oxygen as Oxidant

Shi

Wang

et al. 2020

Materials

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A facile approach is proposed herein to fabricate YMn2O5 powders with the hydrothermal method with oxygen as an oxidant. The structure and morphology of the as-synthesized YMn2O5 powders were characterized by XRD, SEM, and high-resolution transmission electron microscopy (HRTEM). The results manifested that the main factors that affected the formation of the rod-like YMn2O5 structures were the stirring time, hydrothermal temperature, and hydrothermal time. The oxidation time in the air had a remarkable effect on the final product by oxidizing Mn2+ ions to Mn3+ ions and Mn4+ ions. The obtained YMn2O5 powder was single crystalline and possessed a nanorod morphology, where the growth direction was along the c axis. The possible formation mechanism involved a dissolution–crystallization mechanism. Under the 397 nm excitation, the Mn4+ ions exhibited an intense orange emission at 596 nm. The energy bandgap of YMn2O5 powders was 1.18 eV.

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Chelating agents role on phase formation and surface morphology of single orthorhombic YMn2O5 nanorods via modified polyacrylamide gel route

Cited by 14 publications

References 23 publications

Synthesis and Magnetic Properties of LaMnO<sub>3</sub>/α-Al<sub>2</sub>O<sub>3</sub> Magnetic Nanocomposites

Synthesis and Magnetic Properties of LaMnO<sub>3</sub>/α-Al<sub>2</sub>O<sub>3</sub> Magnetic Nanocomposites

Size-tunable synthesis of gold nanorods using pyrogallol as a reducing agent

Rodlike YMn2O5 Powders Derived from Hydrothermal Process Using Oxygen as Oxidant

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