Will WO3 remain stable in an alkaline environment(like KOH&NaOH) !?

More Haniye Salimi's questions See All

Altitude control of a quadrotor ?

hi there i'm working on quadrotor path tracking in matlab's simulink . there is an inner loop which is responsible for tracking the desired euler angles generated by the outer loop . feedback...

05 May 2024 7,705 5 View

I'm getting error:( Domain error. To compute complex results from real x, use 'sqrt(complex(x)) ) in simulink?

hi there . i'm currently working on a thesis which involves designing a fast nonsingular terminal sliding-mode controller for attitude control of a quadrotor. the outputs of sliding mode...

20 April 2024 425 2 View

Which option is more suitable for microalgae cultivation?

I'm planning to cultivate microalgae using diluted dairy wastewater. I'd appreciate hearing about your experiences regarding the following situations to help me select the best option: (a)...

11 April 2024 1,292 1 View

How we can dissolve the styrene-butadiene rubber bale in a solvent (after this step we want to prepare a liquid-liquid solution) ?

1. what is a good and Inexpensive (preferably aliphatic) solvent for SBR ? 2. how we can dissolve SBR bale in White Spirit (402) solvent ? 3. how we can grind SBR bale ? 4. How we can reduce SBRs...

15 March 2024 272 3 View

How is The Volume Expansion Coefficient for Low Solute Concentration Obtained?

Hello dear researchers, Do you know how to solve and prove the formula 5.27 (The Volume Expansion Coefficient for Low Solute Concentration) mentioned in the "diffusion mass transfer book" by...

18 November 2023 302 2 View

Do you need an essential Linear Algebra text book for FREE?

One of the most essential foundations of artificial intelligence and several other fields is linear algebra. For the first time, the new version of Sheldon Axler's essential book Linear Algebra...

30 October 2023 3,999 1 View

How can i enhance my qPCR designed results?

I have a problem with my set-up primers. my results are very poor and I don't know what is the problem for example if results of patients for the specific virus is positive with a viral load of...

24 October 2023 7,311 1 View

Why does the electrical conductivity of the solution decrease due to the addition of tungsten oxide nanoparticles?

The electrical conductivity of the solution decrease due to the addition of tungsten oxide nanoparticles to the electrolyte in the plasma electrolytic oxidation coating process

02 July 2023 2,034 5 View

How we can charectrize pyrolytic carbon and distinguish it from garphite with raman spectroscopy?

can anybody help me?! I'm researching on depositing pyrolytic carbon for about a month and I really stuck on the characterization methods. because the distinguishing this material from graphite is...

13 April 2023 1,724 3 View

Why does XRD analysis sometimes show cementitious products and sometimes not?

Why are some cementitious products caused by soil stabilization or geopolymerization observed in the SEM micrographs, whereas they are not found in the XRD analysis? For example, many articles...

22 March 2023 8,179 1 View

What is the reason for current dropping in OER , LSV curve?

I tried four trials of the same Copper Phosphides sample in Alkaline medium ( 0.5M KOH) with Hg/HgO reference electrode and Pt as counter electrode. I used 0.001 V/s scan rate for first three...

10 August 2024 3,629 1 View

How to saturate steel samples with hydrogen?

I have tried to saturate ferritic steel with hydrogen using the electrolytic method and H2SO4. However, the effect was very poor even after 3 days of "saturation". Can anybody help in choosing a...

24 July 2024 4,393 2 View

Issues in coating of cathode material on Al foil, why we are not getting proper coating and results when the cathode was coated on Al-foil..?

We are trying to coat some cathode materials on Al-foil ( ex - LiFePO4 , S@CNT, etc). When we coated the Al foil with the cathode (ex - S@CNT) material , the cycling result was annoying. But the...

09 July 2024 5,123 4 View

How can we reduce the porosity of tungsten oxide (WO3) thin films during DC sputtering deposition (target: W, power: 100 W, 75 W, and 50 W)?

We are fabricating a tandem structure where a ~50 nm thick WO3 film is deposited between two metal films using DC sputtering. We use a mixture of Ar and O2 gases at different flow rates while...

01 July 2024 2,686 2 View

How can I collect Zirfon membrane for alkaline water electrolysis?

I am doing research in the United Sates America. So, I will pay in US dollar. Could you please tell me how can i get Zirfon membrane? Thank you.

24 June 2024 7,667 0 View

Self discharge of freshly made NMC half cells and voltage stabilizes at 3.3-3.5 V vs Li/Li+ during charging. What can affect it?

I am making Li half cells using NMC as cathode. The OCV is around 3 V but it self discharges and during charging the voltage increases to 3.5 V and then drops to 3.3-3.4 V and stays there. I have...

23 June 2024 842 3 View

What does the area under the curve signify in dielectric loss tangent studies for solid polymer electrolyte ?

In solid ceramic electrolyte what is the Physical significant of area under the curve in dielectric loss tangent studies ??

23 June 2024 4,354 1 View

Can anyone suggest an adhesive that can sustain 600C?

I have to join tungsten wire to metallic plate with that adhesive and entire assembly has to be heated upto 600C in ultra high vacuum. I know about zirconia paste but it is not readily available...

18 June 2024 3,092 3 View

Can anyone explain how mobile ions moves inside ploymer electrolytes?

I want to know the exact mechanism behind the motion of ions inside the polymer electrolytes.

13 June 2024 3,489 0 View

How can I prepare 30m ZnCl2 aqueous solution?

A 30m ZnCl2 aqueous solution is needed to prepare and use the electrolyte, as used in some references denoted below. [Chen, Ze, et al. Journal of the American Chemical Society 145.37 (2023):...

11 June 2024 4,479 1 View

Emanuel Cooper

No. WO3 in alkaline environments, specifically NaOH or KOH, forms soluble tungstates such as Na2WO4.

Haniye Salimi

@Emanuel Cooper

Can WO3 stability be improved in alkaline environment?

I'm not aware of an effective dissolution inhibitor for WO3 at high pH (if this is what you're asking), even though at one point I spent some time looking for one.

It is conceivable that, if the high pH is achieved through addition of an alkaline-earth (Ca/Sr/Ba) hydroxide, the tungstate formed will deposit as a film on the surface of the WO3 particle, since alkaline-earth tungstates have very low solubilities. But then your particles will not be WO3, strictly speaking.