Researchers from Iran University of Science and Technology used nanotechnology to produce a ceramic nanomembrane that is able to eliminate and degrade different types of pollutants in industrial wastewater.
The membrane carries out physical separation and photocatalytic degradation of the pollutants at the same time and it has very high efficiency.
According to Dr. Vahideh Tajer, one of the researchers, the presence of silica in titania network reduces the size of membrane porosity. As a result, the membrane becomes able to eliminate the pollutants based on separation mechanism. In addition, the presence of five molar percent of silica in the membrane increases the ability of the membrane to degrade pollutants by improving its photocatalytic properties. Therefore, the both factors of physical separation and photocatalytic degradation decrease the presence of pollutants in the system. On the other hand, since silica is cheaper than titania, the photocatalytic membrane will be cheaper when titania is replaced by silica in the membrane structure.