Facile preparation and visible light photocatalytic activity of CdIn2S4 monodispersed spherical particles

We developed a facile method to prepare CdIn2S4 monodispersed spherical particles by using mercaptoacetic acid as capping agent and thioacetamide as sulfur source. The results indicated that the size and morphology of CdIn2S4 particles were related to reaction time. The CdIn2S4 spherical particles with an average size of about 236 nm and a narrow size distribution were formed after reacting for 7 h. The photocatalytic activity of as-synthesized CdIn2S4 spherical particles was evaluated by the photocatalytic degradation of methyl orange under visible light illumination. The results showed that the photocatalytic activity increased with prolonging reaction time in the preparation of CdIn2S4 spherical particles. The CdIn2S4 spherical particles prepared after reacting for 7 h exhibited a 98% degradation efficiency of methyl orange after 15 min visible light irradiation.

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► CdIn2S4 monodispersed spherical particles were prepared by a soft solution method.
► Mercaptoacetic acid was used as capping agent to hinder the fast crystal growth.
► Thioacetamide as sulfur source resulted in the slow growth of particles.
► CdIn2S4 spheres showed high visible light photocatalytic activity.