Activated Carbon Loaded with Ti3+ Self-Doped TiO2 Composite Material Prepared by Microwave Method

In this work, the AC loaded with Ti3+ self-doped TiO2 composite material was synthesized by the microwave method. XRD, XPS, SEM, FT-IR, UV-Vis and other characterization methods were used to analyze the crystallinity, valence, morphology and other properties of the composite material. There was a synergistic effect between AC and TiO2, and C-O-Ti and O-Ti-C bonds formed between them, which promoted the formation of anatase, made TiO2 form a mixed crystal form, and improved the efficiency of electron-hole separation. The doping of Ti3+ produced the Jahn-Teller effect, which reduced the band gap energy of the composite material to 2.2-2.4 eV. The adsorption-catalysis experiment showed that the TiO2/Ti3+/AC composite prepared under microwave conditions has a removal rate of more than 96% for Rh-B, and the removal rate of pure TiO2/Ti3+ was only 50.44%. At the same time, the change in the adsorption capacity of AC was explored, and it was found that the saturated adsorption capacity of the 283 K composite material was 161.67 mg g(-1). When the temperature was 323 K, the maximum adsorption capacity was 250.93 mg g(-1). Therefore, the composite material prepared by the microwave method can be regarded as an efficient and economical material for wastewater treatment.

Automated summary

In this study, Ti3+ self-doped TiO2 composite material loaded with AC was synthesized using the microwave method. Various characterization methods were employed to analyze the properties of the composite material, showing that the microwave-prepared composite material exhibited high efficiency in removing pollutants in wastewater treatment.