Antimony - Science topic

Antimony catalysts are used in synthesis of Pegylated esters, such as those used in the Liquid Nanoparticle encapsulated mRNA jabs.

Recently researchers detected Antimony by ICPAES in Moderna product.

Has anyone found Antimony in the Pfizer jabs?

Hello,

we recorded a photoelectron spectrum of an antimony compound. For antimony there are spin-orbit-coupling effects which are also seen in the PES. Now i want to do some calculations on gaussian 09 regarding the spin-orbit splitting. Unluckily i never worked with spin-orbit effects before and wanted to ask if somebody could provide some sort of starting guideline so i can try and calculate these effects.

Thank you

Hello Members

I want to convert antimony trichloride to antimony tribromide with an relative easy -if possible - one Pot Synthesis. Is this usefull with antimony trichloride with boron tribromide?

Could anyone describe me the procedure?

Many thanks for helping.

I'm trying to synthesize a product in which Tl has to be in the +3 oxidation state. My reaction technique is "solution-combustion". Although i used a reactant in which Tl is in its +3 state, in the product Tl gets reduced to +1. What should i do to prevent the Tl ion from reducing?

The 'fuel' of the reaction has CARBON. But in case of Antimony, using the same fuel didn't reduce the Sb ion.

Hello, I will try to produce Sb2S3 films with thermal evaporation technique using Sb2S3 pellets or Sb pieces. Then I will complete the production with thermal annealing. Could you please give information about the risks of Sb2S3 pellets or Sb pieces and the precautions I should take?

what electrolyte should i take to do comparative study of CV and LSV of antimony selenide thin films ? My plan is to do study the "effect of Film Thickness on Photoelectrochemical

Performance of antimony selenide thin films prepared via therma deposition .

Antimony potassium tartarate hemihydrate is often used for quantification of phosphate using ammonium molybdate method with ascorbic acid as a reducing agent. We are recording significant decline in absorption maxima in presence of antimony compared to what we record in its absence. I am unable to uderstand why antimony is used? Amongst reducing agents [used so far by various research teams], we find ascorbic acid to be better.

I have purchased 25 g of magnesium silicide -Mg2Si powder (99.9% pure, 20 mesh) and i want to dope it with pure antimony powder upto 1.5% atomic %.What method i should use? Can anyone explain in detail?

Hi. As compared to silver cyanide electrolyte (without antimony) which brings me about 0.63 microns/minute silver layer by 1 ASD, after mix with some antimony salt into electrolyte the plating rate reduced to 0.44 microns/minute by 1 ASD. Further more, using the same electrolyte, I increased to 5 ASD (with time reduction relatively by 20%), plating rate reduce even further to 0.38 microns/minute.

Why antimony slows down the plating rate? Why increases current density will reduce plating rate even further?

I am looking for an Antimony compound which is soluble and stable in water, able to suffer from hydrolysis for a solution based synthesis. Anyone can recommend a commercial product or a home-made process to make a water soluble one?

I am working on Low temp. schottky diodes. It is the extended work of my recent publication " The influence of antimony doping on I–V, C–V-f and (G/w)-V-f characteristics of indium/ SbXW1-XSe2 (X=0, 0.1, 0.5) alloy Schottky diodes".

Normally, ln(I0/T2)-1000/T have negative slope , but i got positive slope in one case. can it be possible??

The physical and chemical properties,

Toxicity,

Impacts on human, animals, plants, soils, waters, ...

I am trying to dissolve antimony trichloride in 0.1 M HCl or DI water at concentrations as low as 2 mM but it is not dissolving. I am having the same problem with another antimony compound potassium antimony tartrate, which is also not dissolving. Does anyone have an idea how to dissolve these compounds?

I am working on phosphorus analysis in water using molybdenum blue method. I have several questions about it.

1. Sometimes the blank (distilled water or deionized water)becomes blue while it has no phosphorus.

2. Sometimes the color of standards and samples becomes more intensive one or two hours after reading of the absorbtions. Is there a problem?

3. When and why should we acidify the water samples and standards before adding a mixture of ammounium molybdate, antimony tartarate and ascorbic acid?

Thank you in advance.

Hi

Is it possible to make Ag and Sb soluble with acid digestion for ICP-OES, when we have an antimony ore sample?

Thanks in advance.

when i dissolve SbCl3 in methanol, the pH becomes 1-3. So how can i adjust the pH of the solution upto 7 or more? is antimony acetate soluble in methanol?

The introduction of nanotechnology opened new horizons previously unattainable by thermoelectric devices. The nano-scale phenomena began to be exploited through techniques of thin-film depositions to increase the efficiency of thermoelectric films. This chapter reviews the fundamentals of the phenomenon of thermoelectricity and its evolution since it was discovered in 1822. This chapter also reviews the thermoelectric devices, the macro to nano devices, describing the most used techniques of physical vapor depositions to deposit thermoelectric thin-films. A custom made deposition chamber for depositing thermoelectric thin films by the thermal co-evaporation technique, where construction issues and specifications are discussed, is then presented. All the steps for obtaining a thermoelectric generator in flexible substrate with the custom deposition chamber (to incorporate in thermoelectric microsystems) are described. The aim of thermoelectric microsystem relays is to introduce an energy harvesting application to power wireless sensor networks (WSN) or biomedical devices. The scanning probe measuring system for characterization of the thermoelectric thin films are also described in this chapter. Finally, a few of the prototypes of thermoelectric thin films (made of bismuth and antimony tellurides, Bi 2 Te 3 Bi2Te3 , and Sb 2 Te 3 Sb2Te3 , respectively) obtained by co-evaporation (using the custom made deposition chamber) and characterized for quality assessment are dealt with. All the issues involved in the co-evaporation and characterization are objects of analysis in this chapter.

Hello,

I need to synthesize the Tris(triethylsilyl)bismuthane [(CH3CH2)3Si]3Bi. 

So far I tried an analogous method for Antimony described in DOI:10.1021/cm102904f. I assumed that the chemistry should be similar for bismuth. In the first step, I used Sodium naphthalenide and bismuth powder in DME in order to prepare Na3Bi alloy (reflux 2days). Then injected Chlorotriethylsilane followed by reflux for another two days. However, I noticed, that no Bismuth has been reacted (or maybe small fraction) after refluxing for two days, and I have some mess in flask now...

So my first assumption is that no Na3Bi alloy was formed, and the reaction did not proceed.  Because Bi is also black powder as resulting Na3Bi, I can't visually evaluate if the alloy is formed or not. 

So my question is maybe this method is not appropriate for bismuth? Or something wrong with the starting materials?

The alternative is to use NaK, but for safety reasons, I prefer to avoid NaK. 

All reactants used right after purchase, used bismuth powder (325 mesh) DME was purchased dry, stored under molecular sieves.

Any tips? suggestions?

I really need your help. 

I have tried to use a green method to make silver nanowires, problem is when I used AgNO3 crystals despite my best efforts I stained my labs bench and left a few black marks on my hands from when I was handling it. Ok we could say in small doses that is ok and also that it does only is absorbed on the top layer of dead skin, the problem is though that I want to avoid this risk. Are there any ?

It would not be nice for my team if I made a mess again so trying to make sure I don't cause problems for anyone.

Every MSDS sheet I read says AgCl or AgNO3 etc. precursor is corrosive.

Any tips?

Harry

Which acid can I use for digestion of plant parts and soil if I use ICP-OES instrument for Antimony (III and V) and Arsenic (III and V) analysis? Reference is necessary.

There are structural changes occur in the internal structure of antimony trioxide as when the subjected to torch flame ,it absorbs heat energy, causing a change in its internal structure, leading to its transformation into antimony tetroxide. The antimony tetroxide is also considered flame retardant , and constantly shed heat torch absorbs oxide quartet turn the heat energy, causing it to collapse in the end to antimony trioxide again. My question from the standpoint of chemistry, are these changes are infinite or they stop at a certain point?

A lot of industries use ATO (Antimony doped tin oxide) as heat absorber layer. Majority of UV-Vis spectra shown that ATO absorb strongly at IR region while quite transparent at visible part.

While as long as I know, as ATO has semiconductor properties, IR absorbtion represent low band gap material. If IR is absorbed, how can ATO transmits visible light rather than absorbs it?

I've tried two different recipes to synthesize antimony sulphide and in both cases the solution changed color after a few minutes.

Making a research on thermoelctrics with different modules recently working on bismuth telluride but also wanna know about two other materials...

I'm trying to dissolve it in HCl, but I'd like to think about other solutions.

I am having some problems in synthesizing La(0.85)Sb(0.15)MnO(3) through sol-gel synthesis. I would like to know in which all solvents antimony nitrate [Sb(NO3)3] is completely soluble.

I need a patent.