Abstract
The hybrid composites of graphene decorated by large-sized CdS particles (G/M-CdS) were prepared by a one-pot solvothermal route in which the reduction of graphite oxide into graphene was accompanied by the generation of microsized CdS particles. The structure and composition of the obtained nanocomposites were studied by means of X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The CdS particles with the average sizes of approximately 640 nm were formed on graphene sheets. The as-prepared composite was used as adsorbent to remove dye from wastewater using the organic dye Rhodamine B as the adsorbate. The G/M-CdS composite reveals a high photodegradation rate under visible light irradiation. Our results demonstrate that the G/M-CdS is very promising for removing organic dyes from wastewater.
Highlights
In recent years, the growing concerns about energy and environmental problems have stimulated extensive research on solar energy utilization
The X-ray diffraction (XRD) results clearly suggest that the addition of graphene oxide did not influence the crystal structure of hexagonal phase CdS
The crystallinity of the CdS microparticles-graphene composites (G/M-CdS) sample is very close to that of CdS, indicating that the Graphite oxide (GO) supplies a platform in which the CdS particles can nucleate and grow
Summary
The growing concerns about energy and environmental problems have stimulated extensive research on solar energy utilization. It is well known that dyes are widely used in various fields, but their discharge into water could cause environmental pollutions since most of the dyes are harmful. Various strategies are explored to photocatalytic degradation of organic dyes using semiconductor photocatalysts. The carbon nanostructures, acting as outstanding electron acceptors and highly conductive scaffolds, have found their applications in photocatalysis [1,2,3,4]. Used adsorbents can suffer from low adsorption capacities and separation inconveniences. The exploration of new promising adsorbents is still desirable
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