Synthesis of TiO₂‐doped carbon aerogel from sugarcane bagasse for high efficiency of photodegradation of methylene blue in the water

Abstract

In this work, TiO2‐doped carbon aerogel (TiO2/CA) was synthesized from sugarcane bagasse hydrothermal, freeze‐drying, and carbonization methods. The effects of the calcination temperatures of 400, 500, 600, 700, and 800 °C were also evaluated. The obtained TiO2/CA exhibits an ultralow density (0.021‐0.032 g/cm3) and porosity of more than 97 %. The as‐prepared TiO2/CA was applied in photodegradation of methylene blue (MB) with the effects of dose sample and pH were also investigated. The results show that TiO2/CA at 800 °C (TiO2/CA‐800) exhibits the highest MB photodegradation efficiency of 93.86 % at pH 9. The aforementioned results affirm the potential application of sugarcane bagasse for the fabrication of environmentally friendly and low‐cost adsorbents for the photodegradation of MB.

Hexagonal TiO2/SiO2 Porous Microplates for Methylene Blue Photodegradation

“…The sample after impregnation contains silica, titania and oxygen which have different roles because silica with a large surface area increases the homogenization process of methylene blue on the silica surface during the dark adsorption process while titania acts as an active center for photodegradation. The band gap of TiO2 in subsequent studies is approximately 3.3 eV [37] and changed after incorporation in SiO2 to 3.21 eV [38], which is the material for confirming the cause of faster degradation in the presence of UV light compared to the material without a photocatalyst under UV light irradiation, which indicates that the SiO2 material without TiO2 only adsorbs methylene blue [39]. Initial rate estimates demonstrated that the first 30 min of Table 2.…”