why tio2 is better than zno?
606154
It is noted that for the initial concentrations of tartrazine below 30mg/L, constant dye degradation speed is better using ZnO than in the presence of TiO2. Beyond this the constant concentration rate is two times greater for TiO2.
317174
Zinc is cheaper than chromium, and therefore, in general, zinc alloys are relatively less expensive than compared to stainless steel. Though more expensive, stainless steel is a strong, tough material noted for its corrosion resistance. Though some Zinc alloys can be very strong, overall stainless steel is stronger.
569151
Why are ilmenite and rutile considered to be ores? Both contain the useful metal titanium. Titanium can be refined from them profitably.
272150
Oxygen vacancies: The origin of n-type conductivity in ZnO. ... We further demonstrate that, in contrast to the general belief of their neutral attribute, the oxygen vacancies in ZnO are actually +2 charged and thus responsible for the unintentional n-type conductivity as well as the non-stoichiometry of ZnO.
270991
The FDA is proposing that two ingredients are “generally recognized as safe and effective” (GRASE). These ingredients are: Titanium dioxide. Zinc oxide.
697854
While TPO has superior weathering and slightly better tear and break resistance than PVC, PVC does have some characteristics that certain customers need or prefer. ... Also, PVC is slightly more flexible than TPO, which some contractors like. There used to be talk about welding differences, but both membranes weld well.
1168995
Because of the composition, an alkaline battery delivers more energy than a zinc battery. The only consequence of this is that both batteries should be used in different applications.
459004
So when zinc oxide is used in medical preparations, it is quite safe, and doctors usually recommend it for treating diaper rashes in babies. Also, zinc oxide is usually mixed with other ingredients to create ointments which have anti-inflammatory and soothing properties, further protecting your baby's delicate skin.
109438
Longer Tool Life: Simply put, zinc is much stronger and more durable than aluminum. ... Lower Cost: Zinc materials are initially more costly than aluminum because this alloy is of a higher quality. But zinc die casting prices are generally lower than those of aluminum.
10609
Zinc oxide is a topical skin product that is used as a protective coating for mild skin irritations and abrasions. It can promote the healing of chapped skin and diaper rash. Zinc oxide works as a mild astringent and has some antiseptic properties.
675551
Zno is an amphoteric oxide,because it can react with both acids and bases. while in general most oxides only react with acids alone due to its basic nature. Amphoretic oxides contradicts the Bronsted –Lowrey theory of acids and bases. Al2O3,SnO and ZnO are typical examples for amphoteric oxides.
315315
The large particle size of clear zinc oxide give it the same outstanding safety and efficacy of standard non-nano zinc oxide meaning it won't absorb into your skin, it won't harm the environment, and it provides excellent UVA and UVB protection.
695842
“Titanium makes frames that are more durable” and therefore a better value; their high tensile strength creates a more durable frame that “stays in shape longer”. “Titanium frames are 20X more corrosion resistant” than even the finest quality Monel or nickel/silver alloys.
191253
Monocrystalline solar cells are more efficient because they are cut from a single source of silicon. Polycrystalline solar cells are blended from multiple silicon sources and are slightly less efficient. Thin-film technology costs less than mono or poly panels, but is also less efficient.
1261542
Titanium is the most biocompatible (hypoallergenic) element and will not irritate even the most sensitive skin. Since titanium is inert and non reactive to almost all chemicals it will never corrode, tarnish or rust.
1268808
According to our cosmetic consultant, zinc oxide has antimicrobial activity. We agree that it is safe for skin, and it seems to be an inexpensive approach to underarm odor.
15392
Titanium white is more opaque and warmer, so it has more covering power. Most Chinese whites are made out of zinc, and some have a little titanium mixed in them too. To know for sure, look at the color index name on the tube. They are used to lighten color to get a touch of lighter value.