The Effects of Vanadium Pentoxide to Oxalic Acid Ratio and Different Atmospheres on the Formation of VO2 Nanopowders Synthesized via Sol–Gel Method

2017 ◽  
Vol 46 (11) ◽  
pp. 6689-6697 ◽  
Author(s):  
Mohsen Fallah Vostakola ◽  
Bijan Eftekhari Yekta ◽  
Seyed Mohammad Mirkazemi
Keyword(s):  
Oxalic Acid ◽  
Vanadium Pentoxide ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Acid Ratio

Study on synthesis and evolution of sodium potassium niobate ceramic powders by an oxalic acid-based sol–gel method

2010 ◽  
Vol 57 (1) ◽  
pp. 31-35 ◽  
Author(s):  
De-Qing Zhang ◽  
Zi-Cheng Qin ◽  
Xiu-Ying Yang ◽  
Hou-Bin Zhu ◽  
Mao-Sheng Cao
Keyword(s):  
Oxalic Acid ◽  
Sol Gel ◽  
Potassium Niobate ◽  
Ceramic Powders ◽  
Sodium Potassium ◽  
Gel Method ◽  
Sol Gel Method ◽  
Sodium Potassium Niobate

Synthesis and characterization of spinel Li4Ti5O12 anode material by oxalic acid-assisted sol–gel method

2006 ◽  
Vol 158 (2) ◽  
pp. 1358-1364 ◽  
Author(s):  
Yan-Jing Hao ◽  
Qiong-Yu Lai ◽  
Ji-Zheng Lu ◽  
Hong-Li Wang ◽  
Yuan-Duan Chen ◽  
...  
Keyword(s):  
Oxalic Acid ◽  
Anode Material ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Gel Method ◽  
Sol Gel Method ◽  
Li4ti5o12 Anode

Enhancement of Electrochemical Performance of Li4Ti5O12/C Composite Prepared by Sol-Gel Method

2010 ◽  
Vol 178 ◽  
pp. 143-150
Author(s):  
Li Wang ◽  
Yu Shan ◽  
Zong Lin Zhang ◽  
Guang Chuan Liang ◽  
Xiu Qin Ou
Keyword(s):  
Carbon Source ◽  
Oxalic Acid ◽  
Electrochemical Performance ◽  
Sol Gel ◽  
High Rate ◽  
Constant Current ◽  
Tetrabutyl Titanate ◽  
Nano Particle ◽  
Gel Method ◽  
Sol Gel Method

Phase pure Li4Ti5O12/C composite was synthesized by sol-gel method using lithium acetate CH3COOLi•2H2O and tetrabutyl titanate [Ti(OC4H9)4] as starting materials, oxalic acid as chelating agent and sucrose as an additional carbon source. The as-prepared samples were characterized by means of TG-DTA, XRD and SEM. The electrochemical properties were investigated in terms of constant-current charge/discharge cycling and high-rate dischargeability. SEM analysis indicated that the prepared Li4Ti5O12/C composite using sucrose and oxalic acid as carbon source showed a spongy nano-particle aggregate structure, with average nano-particle size of 80-100 nm. Electrochemical results showed that the Li4Ti5O12/C composite prepared in the presence of sucrose exhibited better electrochemical performance with specific discharge capacities of 204.7, 171.6, 155.3 and 154.6 mAh/g at 0.2C, 1C, 2C, and 5C rates, respectively. And the discharge capacity could still reach 143.9mAh/g after 80 cycles at 1C rate, exhibiting excellent cycling performance.

Synthesis, characterization and application of alumina/ vanadium pentoxide nanocomposit by sol-gel method

2017 ◽  
Vol 32 (1) ◽  
pp. e3945 ◽  
Author(s):  
Hassan Hassani ◽  
Batol Zakerinasab ◽  
Hoda Hossien Poor
Keyword(s):  
Vanadium Pentoxide ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Synthesis of YBa2Cu3O7-δ Using Oxalate Precursors and Sol-Gel Method

2006 ◽  
Vol 47 ◽  
pp. 37-42 ◽  
Author(s):  
Angel Bustamante D. ◽  
Ana M. Osorio A. ◽  
Luis De Los Santos V. ◽  
Hilda Carhuancho A. ◽  
J.C. González G. ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Oxalic Acid ◽  
High Purity ◽  
Sintering Temperature ◽  
Ac Susceptibility ◽  
Sol Gel ◽  
Secondary Phases ◽  
Gel Method ◽  
Sol Gel Method ◽  
Quantum Design Squid Magnetometer

In this work we present the results about the preparation of the superconductor YBa2Cu3O7-δ (Y123) by sol-gel method using oxalate precursors. Samples were prepared by dissolving stoichiometric mixtures of Y(OOCCH3).4H2O, Ba(OOCCH3)2 and Cu(OOCCH3)2.H2O acetates in aqueous solution of oxalic acid, HCOO-COOH. The particulate sols obtained (2g.) were divided in two parts (1g. each one), from which the first one (sample A) was grinded, pellet, calcined (860°C) and sinterised at 860°C in oxidizing atmosphere, the second part (sample B) was grinded, pellet, calcined at 880°C and finally sinterized at 880°C in the same conditions, the XRD revels the superconductor Y123 is formed in the first sample, but coexisting with remarkable presence of the secondary phases: CuO, BaCu3O4, BaCO3 and BaCuO2, while in sample B the XRD reveals the obtention of high purity monophase Y123, the ac susceptibility measurement using a Quantum Design (SQUID) magnetometer indicates TC(onset)=92K for this sample, moreover the Rietveld refinement was done taking the orthorhombic Pmmm Y123 spatial group as a model, this suggest the cell´s parameters a=3.839Å, b=3.899 Å and c=11.702Å as reported in the literature. Therefore for the preparation of Y123-superconductor using oxalate precursors, the optimus sintering temperature is 880°C.

Photovoltaic effect on vanadium pentoxide gels prepared by the sol-gel method

1992 ◽  
Vol 4 (5) ◽  
pp. 1074-1077 ◽  
Author(s):  
Ondrej Dvorak ◽  
James Diers ◽  
M. Keith De Armond
Keyword(s):  
Vanadium Pentoxide ◽  
Photovoltaic Effect ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method
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