Photocatalytic oxidation of formaldehyde under visible light using BiVO-TiO synthesized via ultrasonic blending.

Formaldehyde (HCHO) is one of the primary indoor air pollutants, and efficiently eliminating it, especially at low concentrations, remains challenging. In this study, BiVO-TiO catalyst was developed using ultrasonic blending technology for the photocatalytic oxidation of low-level indoor HCHO. The crystal structure, surface morphology, element distribution, and active oxidation species of the catalyst were examined using XRD, SEM, TEM, UV-Vis, EDS, and ESR techniques.

Synergistic effect of photo-thermal oxidation for a low concentration of HCHO over Bi-TiO/MnFeO catalysts at ambient temperature.

Formaldehyde (HCHO) has been one of the important air pollutants, and the effective removal of HCHO at ambient temperature has been a big challenge. In this work, the synergistic effect of photo-thermal oxidation with Bi-TiO/MnFeO for a low concentration of HCHO was investigated. MnFeO was synthesized by the complexation method (CM) and co-precipitation (CP), and TiO with Bi doping supported on MnFeO was prepared by using the hydrothermal method to obtain a higher oxidation performance.