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

In this work, the AC loaded with Ti 3+ self-doped TiO 2 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 TiO 2 , and C-O-Ti and O-Ti-C bonds formed between them, which promoted the formation of anatase, made TiO 2 form a mixed crystal form, and improved the efficiency of electron–hole separation. The doping of Ti 3+ 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 TiO 2 /Ti 3+ /AC composite prepared under microwave conditions has a removal rate of more than 96% for Rh-B, and the removal rate of pure TiO 2 /Ti 3+ 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.