Novel titanium dioxide–graphene–activated carbon ternary nanocomposites with enhanced photocatalytic performance in rhodamine B and tetracycline hydrochloride degradation

• Published in: Journal of materials science Vol. 52; no. 13; pp. 8311 - 8320
• Main Authors: Qu, Lu-Lu, Wang, Na, Li, Yan-Yan, Bao, Dan-Dan, Yang, Guo-Hai, Li, Hai-Tao
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.07.2017; Springer; Springer Nature B.V
• Subjects: Activated carbon; adsorption; air; Air purification; Aqueous solutions; Catalysis; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Crystallography and Scattering Methods; Diffuse reflectance spectroscopy; electrons; Graphene; graphene oxide; Graphite; irradiation; Light irradiation; lighting; Materials Science; Microscopy; Nanocomposites; Organic chemistry; Original Paper; Photocatalysis; Photocatalysts; Photodegradation; photolysis; Polymer Sciences; reflectance spectroscopy; Rhodamine; Scanning electron microscopy; Solid Mechanics; tetracycline; Titanium; Titanium dioxide; Transmission electron microscopy; Wastewater treatment; X-ray diffraction; Activate Carbon; Graphene Oxide; Photocatalytic Activity; Graphene Sheet; TiO2
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-017-1047-0

A novel ternary nanocomposite consisting of activated carbon (AC) and titanium dioxide (TiO 2 ) decoration in the presence of reduced graphene oxide (TiO 2 –rGO–AC) was fabricated by a facile hydrothermal synthesis method for use as a high-performance photocatalyst. The as-prepared TiO 2 –rGO–AC nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and UV–Vis diffuse reflectance spectroscopy. The results demonstrated that the TiO 2 and activated carbon were well dispersed on the rGO surface. The photocatalytic performance of the TiO 2 –rGO–AC nanocomposite was evaluated as a catalyst for the photodegradation of rhodamine B. The degradation rate was 3.4 times higher than that of pure TiO 2 under simulated solar light irradiation. The enhancement of photocatalytic performance is attributed to the adsorption of AC which significantly increased the organic molecule concentration near the catalytic surface, allowing the effective transfer and separation of photogenerated electrons. TiO 2 –rGO–AC photocatalyst is also effective for the degradation of tetracycline in aqueous solution, suggesting wide application of these nanocomposite materials in various fields including air purification and wastewater treatment.