Bioframe synthesis of NF–TiO₂/straw charcoal composites for enhanced adsorption-visible light photocatalytic degradation of RhB

Abstract

N-F codoped TiO 2 /straw charcoal composites (NF-TiO 2 /SC) were synthesized using a simple, bioframe-assisted sol-gel method and confirmed by XRD, SEM, EDX, TEM, N 2 adsorption-desorption, Raman, FT-IR, XPS, UV-vis DRS measurements. It has been found that the as-synthesized catalysts formed 3D-hierarchical structure with carbon framework after calcination.The physicochemical properties such as BET surface area, porosity, crystallite size and pore size distribution could be effectively controlled by adjusting the calcination temperature. Higher surface area, smaller crystallite size and higher absorption in the visible light region were obtained for NF-TiO 2 /SC calcined at 450 ºC. Under visible light irradiation, NF-TiO 2 /SC450 exhibited much higher adsorptive ability and photocatalytic activity and there existed a significant synergistic effect between adsorption and photocatalytic degradation. Furthermore, the as-synthesized catalysts have a good mineralized ability and can be used repeatedly, revealing great potential for practical applications in environmental cleanup.

Fe2O3/TiO2/Activated Carbon Nanocomposite with Synergistic Effect of Adsorption and Photocatalysis

“…Furthermore, the photocatalytic experimental data obtained from Fig. 5 were fitted into the pseudo‐first‐order Langmuir‐Hinshelwood model 40. …”

Influences of Doping on Photocatalytic Properties of TiO2 Photocatalyst

“…The high activity could be attributed to the presence of N and F, which resulted in the change in the morphology and increasing presence of {001} facets [262]. Subsequently, a great number of experiments and theoretical calculations were carried out to further discuss (N, F) codoping in TiO 2 crystals [263][264][265][266][267]. Rahul TiO 2 by templating with polystyrene colloidal photonic crystals using nitric acid and trifluoroacetic acid as raw materials and found an obvious red shift due to (N, F) codoping [263].…”

Floating photocatalyst of B–N–TiO2/expanded perlite: a sol–gel synthesis with optimized mesoporous and high photocatalytic activity

“…Migration of organic compounds from chemical industries, manufacture and agriculture into water, air and soil has attracted global attention. Photocatalytic oxidation with titanium dioxide (TiO 2 ) has been considered to degrade organic containments effectively 1 2 . Mesoporous TiO 2 materials generally have remarkable properties, such as large and uniform pore sizes, porous structures and a higher electron–hole separation rate; these materials are also known for its worldwide availability, chemical stability, high photocorrosion stability and environmental friendliness 3 4 .…”