Synthesis of NiO and TiO2 Combined SiC Matrix Nanocomposite and Its Photocatalytic MB Degradation

다국어 초록 (Multilingual Abstract)

Interest in the use of semiconductor-based photocatalyst materials for the degradation of organic pollutants in a liquid phase has grown, due to their excellent performance and response to the light source. Herein, we fabricated a NiO-SiCTiO2 ternary structured photocatalyst which had reduced bandgap energy, with strong activation under UV-light irradiation. The synthesized samples were examined using XRD, SEM, EDX, TEM, DRS, EIS techniques and photocurrent measurement. The results confirmed that the two types of metal oxides were well bonded to the SiC fiber surface. The junction of the new photocatalyst exhibited a large number of photoexcited electrons and holes. The holes tended to oxidize the water and form a hydroxyl radical, which promoted the decomposition of methylene blue. The close contact between the 2D SiC fiber and metal oxide semiconductors expanded the scope of absorption wavelength, and enhanced the usability of the ternary photocatalyst for the degradation of methylene blue. Among three synthesized samples, the NiO-SiC-TiO2 showed the best photocatalytic effect, and was considered to have excellent photoelectron transfer due to the synergy effect between the metal oxide and SiC.

목차 (Table of Contents)

• Abstract
• 1. Introduction
• 2. Synthesis and Experiment Setup
• 2.1. Materials
• 2.2. Synthesis of NiO-SiC
• 2.3. Synthesis of TiO2-SiC
• 2.4. Characterization
• 2.5. The experiment setup for the MB degradation
• 3. Result and Discussion
• 3.1. XRD, SEM, TEM and EDX analysis
• 3.2. Electrochemical analysis
• 4. Conclusion
• References