Effects of Copper Ions and Chelate Agent on Output of Ascorbic Acid Fuel Cell

2011 ◽  
Author(s):  
Ryota Furugori ◽  
Seiki Ikeda ◽  
Makoto Tanaka
Keyword(s):  
Aqueous Solution ◽  
Ascorbic Acid ◽  
Fuel Cell ◽  
Oxidation Reaction ◽  
Room Temperature ◽  
Copper Ions ◽  
Chelating Agent ◽  
Chelate Agent ◽  
Acid Aqueous Solution ◽  
Type Fuel

A catalyst plays an important role in fuel cell because of promotion of chemical reaction for room temperature type fuel cell. In general, platinum is adopted as a catalyst even though it is very expensive. An ascorbic acid aqueous solution is able to react without catalyst for the oxidation reaction. At first, authors made sure of generation of the electric output using ascorbic acid for fuel without the catalyst. Next, we were able to increase the electric output with adding to metal ions to ascorbic acid aqueous solution. Finally, high and stable electric output was obtained by using the chelating agent.

scholarly journals Stabilization of Ascorbic Acid Aqueous Solution by Protamine

1993 ◽  
Vol 113 (5) ◽  
pp. 385-390 ◽  
Author(s):  
Shuji YAMAUCHI ◽  
Noriyuki NIMURA ◽  
Toshio KINOSHITA
Keyword(s):  
Aqueous Solution ◽  
Ascorbic Acid ◽  
Acid Aqueous Solution

Study on the Removal of Copper Ions from Water Using Eco-Friendly Attapulgite/Chitosan Composites

2012 ◽  
Vol 499 ◽  
pp. 419-422
Author(s):  
Yong Chen ◽  
Hui Xu ◽  
Jin Bao Sun ◽  
Chang Long Zhang
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Room Temperature ◽  
Copper Ions ◽  
External Factors ◽  
Mass Ratio ◽  
Absorption Time ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Adsorbent Dosage

In this work attapulgite and chitosan were employed to prepare composites as eco-friendly adsorbent. Study on the removal efficiency of the adsorbent for copper ions in aqueous solution was carried out. External factors such as the amount of attapulgite in the composites, temperature, initial concentration of copper ions, adsorption time and adsorbent dosage how to influence the removal efficiency of composites were investigated. The results showed that at room temperature, 0.37g adsorbent can reach maximum adsorption rate, which the mass ratio of attapulgite and chitosan is 1:1, the initial concentration of copper ions is 50mg / L and absorption time is 2h.

THE INTERACTION OF o-DIPHENOLS WITH α-DIKETONES: THE REACTION OF 5,6-DIHYDROXY-N-METHYLINDOLE WITH DEHYDROASCORBIC ACID

1964 ◽  
Vol 42 (6) ◽  
pp. 1401-1408 ◽  
Author(s):  
G. L. Mattok ◽  
R. A. Heacock
Keyword(s):  
Aqueous Solution ◽  
Ascorbic Acid ◽  
Room Temperature ◽  
Indole Derivative ◽  
Dehydroascorbic Acid

5,6-Dihydroxy-N-methylmdole readily reacts with dehydroascorbic acid in aqueous solution at room temperature. The o-diphenol system of the indole derivative interacts with the α-diketone function of dehydroascorbic acid to form a 1,4-benzodioxane derivative. This type of reaction appears to be a general one since similar interactions occur between other o-diphenols and α-diketones. The mechanism by which the 1,4-benzodioxane derivative is obtained when adrenochrome is reduced with ascorbic acid is discussed.

scholarly journals Practical Synthesis of 2-Iodosobenzoic Acid (IBA) without Contamination by Hazardous 2-Iodoxybenzoic Acid (IBX) under Mild Conditions

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1897
Author(s):  
Hideyasu China ◽  
Nami Kageyama ◽  
Hotaka Yatabe ◽  
Naoko Takenaga ◽  
Toshifumi Dohi
Keyword(s):  
Aqueous Solution ◽  
Room Temperature ◽  
Practical Method ◽  
Hypervalent Iodine ◽  
Mild Conditions ◽  
Sequential Procedures ◽  
Iodine Compounds ◽  
Practical Synthesis ◽  
Iodosobenzoic Acid ◽  
Lower Temperature

We report a convenient and practical method for the preparation of nonexplosive cyclic hypervalent iodine(III) oxidants as efficient organocatalysts and reagents for various reactions using Oxone® in aqueous solution under mild conditions at room temperature. The thus obtained 2-iodosobenzoic acids (IBAs) could be used as precursors of other cyclic organoiodine(III) derivatives by the solvolytic derivatization of the hydroxy group under mild conditions of 80 °C or lower temperature. These sequential procedures are highly reliable to selectively afford cyclic hypervalent iodine compounds in excellent yields without contamination by hazardous pentavalent iodine(III) compound.

scholarly journals Self-assembly induced luminescence of Eu3+-complexes and application in bioimaging

2021 ◽  
Author(s):  
Ping-Ru Su ◽  
Tao Wang ◽  
Pan-Pan Zhou ◽  
Xiao-Xi Yang ◽  
Xiao-Xia Feng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rare Earth ◽  
Luminescence Intensity ◽  
Self Assembly ◽  
Room Temperature ◽  
Molecular Motion ◽  
Proof Of Concept ◽  
Room Temperature Phosphorescence ◽  
New Strategy ◽  
Size Controlled

Abstract Design and engineering of highly efficient emitting materials with assembly-induced luminescence, such as room temperature phosphorescence (RTP) and aggregation-induced emission (AIE), have stimulated extensive efforts. Here, we propose a new strategy to obtain size-controlled Eu3+-complex nanoparticles (Eu-NPs) with self-assembly induced luminescence (SAIL) characteristics without encapsulation or hybridization. Compared with previous RTP or AIE materials, the SAIL phenomena of increased luminescence intensity and lifetime in aqueous solution for the proposed Eu-NPs are due to the combined effect of self-assembly in confining the molecular motion and shielding the water quenching. As a proof of concept, we also show that this system can be further applied in bioimaging, temperature measurement and HClO sensing. The SAIL activity of the rare-earth (RE) system proposed here offers a further step forward on the roadmap for the development of RE light conversion systems and their integration in bioimaging and therapy applications.

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