Cobalt and sulfur co-doped nano-size TiO2 for photodegradation of various dyes and phenol

• Published in: Journal of environmental sciences (China) Vol. 37; pp. 100 - 109
• Main Authors: Siddiqa, Asima, Masih, Dilshad, Anjum, Dalaver, Siddiq, Muhammad
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.11.2015
• Subjects: Catalysis; Co-doped TiO2; Cobalt - chemistry; Coloring Agents - chemistry; Dye degradation; Environmental Pollutants - chemistry; Hydrogen-Ion Concentration; Nanoparticles; Nanoparticles - chemistry; Phenol; Phenol - chemistry; Photocatalysis; Photolysis; Sulfur - chemistry; Titanium - chemistry; Nanoparticles; Dye degradation; Phenol; Co-doped TiO2; Photocatalysis; Co-doped TiO
• ISSN: 1001-0742; 1878-7320
• DOI: 10.1016/j.jes.2015.04.024

Various compositions of cobalt and sulfur co-doped titania nano-photocatalyst are synthesized via sol–gel method. A number of techniques including X-ray diffraction (XRD), ultraviolet–visible (UV–Vis), Rutherford backscattering spectrometry (RBS), thermal gravimetric analysis (TGA), Raman, N2 sorption, electron microscopy are used to examine composition, crystalline phase, morphology, distribution of dopants, surface area and optical properties of synthesized materials. The synthesized materials consisted of quasispherical nanoparticles of anatase phase exhibiting a high surface area and homogeneous distribution of dopants. Cobalt and sulfur co-doped titania demonstrated remarkable structural and optical properties leading to an efficient photocatalytic activity for degradation of dyes and phenol under visible light irradiations. Moreover, the effect of dye concentration, catalyst dose and pH on photodegradation behavior of environmental pollutants and recyclability of the catalyst is also examined to optimize the activity of nano-photocatalyst and gain a better understanding of the process. Cobalt and sulfur co-doped nano-size titania synthesized via sol–gel method demonstrated extraordinary photocatalytic activity for photodegradation of dyes and phenol under visible-light irradiation. [Display omitted]