Effect of preparation methods on the activity of titanium dioxide-carbon nitride composites for photocatalytic degradation of salicylic acid

12th Joint Conference on Chemistry

Yuliati, L.^1,2,3 ; Salleh, A.M.^4 ; Hatta, M.H.M.^4 ; Lintang, H.O.^1,3

Ma Chung Research Center for Photosynthetic Pigments, Universitas Ma Chung, Villa Puncak Tidar N-01, East Java, Malang

65151, Indonesia^1

Department of Chemistry, Faculty of Science and Engineering, Universitas Ma Chung, Villa Puncak Tidar N-01, East Java, Malang

65151, Indonesia^2

Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, UTM Johor Bahru, Johor

81310, Malaysia^3

Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, UTM Johor Bahru, Johor

81310, Malaysia^4

关键词: Diffuse reflectance;    High photocatalytic activities;    Photo catalytic degradation;    Photocatalytic activities;    Preparation method;    UV and visible light;    UV-light irradiation;    Visible-light irradiation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/349/1/012033/pdf
DOI  :  10.1088/1757-899X/349/1/012033

来源: IOP

【 摘 要 】

In this study, titanium dioxide-carbon nitride (TiO2-CN) composites were prepared by three methods, which were one pot oxidation, impregnation, and physical mixing. Each series of the photocatalysts was prepared with different ratios of titanium to carbon (Ti/C), i.e., 1, 5, 10, 20, and 50 mol%. All samples were characterized by X-ray diffraction (XRD) and diffuse reflectance ultraviolet-visible (DR UV-Vis) spectroscopies. The characterization results confirmed the successful preparation of TiO2, CN, and the TiO2-CN composites. Photocatalytic activity tests were carried out for degradation of salicylic acid at room temperature for 6 h under UV and visible light irradiations. It was confirmed that all the prepared TiO2-CN composites showed better photocatalytic activities than the bare TiO2and the bare CN. Under UV light irradiation, 90.6% of salicylic acid degradation was achieved on the best composite prepared by one pot oxidation with 5 mol% of titanium to carbon (Ti/C) ratio. On the other hand, the highest degradation under visible light irradiation was 94.3%, observed on the composite that was prepared also by one pot oxidation method with the Ti/C ratio of 10 mol%. Therefore, among the investigated methods, the best method to prepare the titanium dioxide-carbon nitride composites with high photocatalytic activity was one pot oxidation method.