Cleaning Up Water

Cleaning Up Water

Author: Anne Deveson

Removing organic pollutants from wastewater by means of visible-light-induced photocatalysts has attracted a lot of attention in recent years.

Hui Xu and Huaming Li and their research groups at Jiangsu University, China, have developed a new type of graphene-like MoS2/C3N4 composite by means of a facile ethylene glycol-assisted solvothermal treatment. They found for the degradation of methyl orange, a dye commonly used as a model pollutant in wastewater studies, when the composite photocatalyst was irradiated with visible light, it displayed enhanced activity relative to those of the respective individual graphene-like (GL) components GL-MoS2 and GL-C3N4. They attribute this activity to the presence of a heterojunction structure between the two GL components that supports the efficient separation of electron–hole pairs as a result of their matching band potentials.

In addition the team found that GL-MoS2/C3N4 worked well as a sensor for trace amounts of Cu2+ in water and thus may also have potential applications for use in heavy-metal-ion trace analysis and detection in the aqueous environment.


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