Titanate Nanotubes Produced From Microwave-Assisted Hydrothermal Synthesis: Characterization, Adsorption and Photocatalytic Activity

Abstract

-A microwave-assisted hydrothermal (MAH) method was employed to synthesize TiO2 nanotubes (TNTs) and these were compared to the conventional hydrothermal (CH) method. The nanotubes were characterized for their crystallinity, morphology, surface area and photocatalytic activity. The TiO2 P25 was used for comparison purposes and efficiently degraded both dyes. However, methylene blue was adsorbed on the nanotube surfaces, which can be attributed to the electrostatic interaction between the cationic methylene blue and the negatively charged TNT surface. On the other hand, all nanotubes had a photocatalytic performance with methyl orange (anionic dye). Additional degradation was observed for nanotubes synthesized via the MAH method at 150 °C. This can be directly related to their larger surface area. Adsorption mechanisms of TNTs were also discussed by applying the Langmuir and Freundlich isotherm. The results show an efficient dye wastewater treatment through the application of TNT photocatalyst.

Eco-Friendly Sustainable Fluorescent Carbon Dots for the Adsorption of Heavy Metal Ions in Aqueous Environment

“…Since the estimation of the adsorption isotherm parameters interference are through linearization method. The following three forms of linearized isotherm equation are used to determine the constants K L and q max [52].…”

“…The surface charge of the carbon dots at pH = 7 was obtained as −31.7 mV charge. The negative ζ potential is due to dense electron cloud concentrating on the CDs [52]. The value of ζ potential relies upon a short or a long-term stability of CDs particles.…”

Sol-Gel Synthesis and Characterization of Carbon doped TiO2 based on Solanum Tuberosum Starch

“…The perfect sol-gel process will give a small and uniform size. The particle size is inversely proportional to the resulting surface area (Manique, et al, 2017), in the synthesis of nanoparticles the smaller the particles obtained indicate the possibility of a larger surface area. Therefore, the results obtained by XRD refinement are the most effective results on the mass variation ratio of 1.5 grams of carbon precursors and reaction time of 24 hours.…”

Titanate Nanotubes as Futuristic Catalyst Support Material

“…Titanate nanotubes (TNTs) derived from titanium dioxide have interesting behaviour in surface chemistry in terms of structural changes and morphological differences [1]. Several applications of titanates nanotubes in various industrial products have been reported [2,3]. The importance of tubular form of titanate to be used as a suitable catalytic support material is emphasised further due to its high surface area, thermal stability, and longer life during the course of the reaction [4].…”