Efficient Cr(vi) photoreduction under natural solar irradiation using a novel step-scheme ZnS/SnInS nanoheterostructured photocatalysts.

Removal of heavy metal pollutants from water is a challenge to water security and the environment. Therefore, in this work, multinary chalcogenide based nanoheterostructures such as ZnS/SnInS nanoheterostructure with different loading amounts were prepared. The prepared nanoheterostructures were utilized as photocatalysts for chromium (Cr(vi)) photoreduction.

Subcritical and supercritical water oxidation for dye decomposition.

The total annual output of synthetic dyes exceeds 7 × 10 tons. About 1,000 tons of non-biodegradable synthetic dyes are released every year into the natural streams and water sources from textile wastes. The release of these colored wastewater exerts negative impact on aquatic ecology and human beings because of the poisonous and carcinogenic repercussions of dyes involved in coloration production.