Nd2Cu2O4+δnanosheets were synthesized via coordination complex method(CCM)by using[NdCu(3,4-pdc)2(OAc)(H2O)5]·6.5H2O(1,3,4-pdc=3,4-pyridinedicarboxylic acid)as the precursor.Compared to the particles prepared by...Nd2Cu2O4+δnanosheets were synthesized via coordination complex method(CCM)by using[NdCu(3,4-pdc)2(OAc)(H2O)5]·6.5H2O(1,3,4-pdc=3,4-pyridinedicarboxylic acid)as the precursor.Compared to the particles prepared by SSM(simple solution method),Nd2Cu2O4+δprepared by CCM showed leaf-like morphology composed of nanosheets with an average thickness of 50~80 nm and a BET surface area up to 17.9 m^2/g.The Nd2Cu2O4+δsamples exhibit selective adsorption towards malachite green(MG)with significant Qm(maximum adsorption capacity)values reaching up 1.55 g/g at room temperature,and the thermodynamic parameters of adsorption process were obtained.In addition,the properties of selective adsorption of the prepared samples were investigated by temperature change tests.展开更多
Ⅰ. INTRODUCTIONThe phase relation in a high T<sub>c</sub> superconducting oxide system is essential to gain an insight into the relations among the composition, structure and physical properties. There fo...Ⅰ. INTRODUCTIONThe phase relation in a high T<sub>c</sub> superconducting oxide system is essential to gain an insight into the relations among the composition, structure and physical properties. There fore, the investigations have been done on the phase relations in different superconducting oxide systems, such as Y<sub>2</sub>O<sub>3</sub>- BaO-CuO, La<sub>2</sub>O<sub>3</sub>BaO-CuO, Gd<sub>2</sub>O<sub>3</sub>-BaO-CuO and Ho<sub>2</sub>O<sub>3</sub>-BaO-CuO systems. In this note, the Nd<sub>2</sub>O<sub>3</sub>-BaO-CuO ternary system has been studied thoroughly, and, at the same time, the correlative Nd<sub>2</sub>O<sub>3</sub>-CuO binary展开更多
One of the basic ingredients in conventional preparation of cuprates-based superconducting materials such as the Nd-Ba-Cu-O superconducting system, especially the Nd1Ba2Cu3O7-δ phase is Barium Carbonate (BaCO3). It h...One of the basic ingredients in conventional preparation of cuprates-based superconducting materials such as the Nd-Ba-Cu-O superconducting system, especially the Nd1Ba2Cu3O7-δ phase is Barium Carbonate (BaCO3). It has the potential to produce the carbon dioxide (CO2) air pollutant. Therefore it is necessary to look for other materials as the source of Ba atom which does not produce CO2 gas. In this research has been successfully made the Nd1Ba2Cu3O7-δ phase with the Barium Hydroxide Octahydrate (Ba(OH)2·8H2O) as a source of Ba atom. The results of the characterization XRD has been shown the main peaks of the Nd1Ba2Cu3O7-δ phase. Refinement of the XRD data by using Rietica software, obtained the value of GofF (Goodness of Fit) = 1.7023 and lattice parameter a ≈ b < c/3 with a value of c/3 = 3.9275 A.展开更多
基金supported by Liaoning Province College Innovative Talents Fund Project(No.LCR2018016)the Natural Science Foundation of Liaoning Province(No.2019-MS-244)。
文摘Nd2Cu2O4+δnanosheets were synthesized via coordination complex method(CCM)by using[NdCu(3,4-pdc)2(OAc)(H2O)5]·6.5H2O(1,3,4-pdc=3,4-pyridinedicarboxylic acid)as the precursor.Compared to the particles prepared by SSM(simple solution method),Nd2Cu2O4+δprepared by CCM showed leaf-like morphology composed of nanosheets with an average thickness of 50~80 nm and a BET surface area up to 17.9 m^2/g.The Nd2Cu2O4+δsamples exhibit selective adsorption towards malachite green(MG)with significant Qm(maximum adsorption capacity)values reaching up 1.55 g/g at room temperature,and the thermodynamic parameters of adsorption process were obtained.In addition,the properties of selective adsorption of the prepared samples were investigated by temperature change tests.
文摘Ⅰ. INTRODUCTIONThe phase relation in a high T<sub>c</sub> superconducting oxide system is essential to gain an insight into the relations among the composition, structure and physical properties. There fore, the investigations have been done on the phase relations in different superconducting oxide systems, such as Y<sub>2</sub>O<sub>3</sub>- BaO-CuO, La<sub>2</sub>O<sub>3</sub>BaO-CuO, Gd<sub>2</sub>O<sub>3</sub>-BaO-CuO and Ho<sub>2</sub>O<sub>3</sub>-BaO-CuO systems. In this note, the Nd<sub>2</sub>O<sub>3</sub>-BaO-CuO ternary system has been studied thoroughly, and, at the same time, the correlative Nd<sub>2</sub>O<sub>3</sub>-CuO binary
文摘One of the basic ingredients in conventional preparation of cuprates-based superconducting materials such as the Nd-Ba-Cu-O superconducting system, especially the Nd1Ba2Cu3O7-δ phase is Barium Carbonate (BaCO3). It has the potential to produce the carbon dioxide (CO2) air pollutant. Therefore it is necessary to look for other materials as the source of Ba atom which does not produce CO2 gas. In this research has been successfully made the Nd1Ba2Cu3O7-δ phase with the Barium Hydroxide Octahydrate (Ba(OH)2·8H2O) as a source of Ba atom. The results of the characterization XRD has been shown the main peaks of the Nd1Ba2Cu3O7-δ phase. Refinement of the XRD data by using Rietica software, obtained the value of GofF (Goodness of Fit) = 1.7023 and lattice parameter a ≈ b < c/3 with a value of c/3 = 3.9275 A.
