Synthesis and Characterization of Ag@C-TiO2 Nanocomposite for Degradation of Sasirangan Textile Wastewater

Abstract

Carbon-titanium oxide nanocomposite (denoted as @C-Ti02) was successfully synthesized via hydrothermal method at 150°C for 24 h. The C-Ti02 nanocomposite was furtherly modified by adding an Ag metal dopant (denoted as Ag@C-Ti02) to improve and applied to the photocatalytic degradation of Sasirangan textile wastewater. The composite photocatalysts were characterized by XRD and UV-Vis DRS spectroscopies. XRD patterns showed that Ti02 in @C-Ti02 mainly consisted of a brookite phase, as indicated by a series sharp diffraction peak at 2 = 27.20 (111), 31 -5°( 121) and 55.90 ( 241 ). The calculated band gap energy (£ g ) derived from UV-Vis DRS spectra for Ti02, @C-Ti02, and Ag@C-Ti02 were 2.95 eV, 2.54 eV, and 2.74 eV, respectively. Ag@C-Ti02 photocatalyst was found to be active for the photocatalytic degradation of Sasirangan textile wastewater, as indicated by the change of wastewater color from dark to clear. The quantitative photocatalytic activity of Ag@C-Ti02 was evaluated in the degradation of methylene blue, whereas the conversion of methylene blue was 41.3 %. The addition of Ag to @C-Ti02 is believed to play an essential role in the enhancement of photocatalytic activity.

Selective hydroconversion of coconut oil-derived lauric acid to alcohol and aliphatic alkane over MoOx-modified Ru catalysts under mild conditions

“…71 Interestingly, Ru-MoO x supported on carbon doped-titanium oxide (Ru-MoO x /C-TiO 2 ), which was obtained from one-pot hydrothermal of TiCl 4 and glucose solutions at 150 C for 24 h as reported previously (XRD patterns are shown in Fig. S7, in the ESI †), 72,73 gave dodecane-1-ol (68%), n-dodecane (23%), and others (8%) (entry 2). Ru-MoO x supported on g-Al 2 O 3 and SiO 2 catalysts showed lower lauric acid conversion (72-80%) and produced dodecane- 1ol (52-63%), n-dodecane (10-12%), and others ($8%) (entries 3-4).…”