Material Science

Chemists build up a new eco-friendly material for waste water purification

RUDN chemists have built up a hybrid nanocatalyst for fast removal of stable organic dyes from wastewater. This catalyst does not require extra forceful solvents. The results of the investigation were published in Inorganic Chemistry.

Industrial dying of plastics, fabrics and other materials requires toxic organic dyes that are hazardous for people and the environment over the long haul. So ecologists attempt to expel residual dyes from plant wastewater. For instance, utilizing coagulants can accelerate the sedimentation of dye particles, however this makes water residue up. Water purification with ozone keeps this, yet the technology is costly. RUDN chemists, together with their colleagues from China, Pakistan, and Portugal, presently propose a less expensive and more eco-friendly strategy of water purification.

The analysts presented a sanitizing hybrid nanomaterial—a grid containing metal atoms and organic molecules. Such structures were utilized as catalysts. The second part of the new nanomaterial was a base made of layered double hydroxides. The two sections self-organize and form a single flat nanostructure. The main feature of this material lies in its abnormal structure—it is porous and crystalline in the meantime, and it is likewise solid.

The RUDN chemists gave a detailed description of the entire synthesis procedure and afterward tested the new material as a catalyst for wastewater purification from organic dyes. Such organic dyes as methylene blue, congo red, methyl orange and others were utilized in the experiment. The hybrid nanogrid could purify a water solution from the dyes rapidly: Methyl orange was deactivated in only one moment, and a steady fluorescent dye called rhodamine 6G neutralized in a few minutes. In addition, the new material does not lose its properties after the first use and might be utilized something like five times with no quality diminishing.

“Our development would stimulate the creation of new nanomaterials with improved functional properties and wide areas of use in green chemistry. We are going to continue our studies and hope to obtain nanomaterials to remove other contaminants in the future,” said Alexander Kirillov, a co-author of the work, Ph.D. in chemistry, and an associate of the Joint Institute for Chemical Studies at RUDN.