Photocatalytic Degradation of Methylene Blue Using TiO2-Natural Zeolite as A Photocatalyst

Abstract

TiO 2 -zeolite photocatalyst has been prepared by impregnation of TiO 2 onto acid-activated natural zeolite. The XRD data confirmed that natural zeolite used in this work is predominated with mordenite and clinoptilolite types, whereas anatase type can be attributed to TiO 2 . The highest performance of TiO 2 -zeolite, which is indicated by the surface area of 13.304 m 2 /g and band gap energy of 3.15 eV, is obtained when 10 mmol of TiO 2 is impregnated onto the zeolite. The ability of this photocatalyst is evaluated by examining degradation of methylene blue (MB) in the presence of UV source. The effects of MB concentration, pH and UV irradiation time on the degradation are studied in a batch reactor. It is interesting since the addition of H 2 O 2 can improve the degradation efficiency of MB. The optimum result is achieved at pH 11, duration of UV irradiation of 50 min, showing degradation amount of 98.25%. Surprisingly, the chemical oxygen demand (COD) in the degraded MB aqueous solution can be reduced about 77.9%, exhibiting the improvement of water quality. No loss of the activity of the degradation efficiency after reusability of this TiO 2 -zeolite photocatalyst for at least 4 times.

Zeolite/ZnO composites based on a Cuban natural clinoptilolite and preliminary evaluation in methylene blue adsorption

“…The photodegradation of methylene blue has been also very studied [20][21][22]. It has been reported the use of different semiconductor metal oxides like TiO 2 , CuO and ZnO, either alone or supported in porous materials for such purpose [23][24][25][26].…”

Fabrication and Performance of Laterite East Kotawaringin-Zeolite/Chitosan Composite as Slow Release of Iron Fertilizer

“…The zeolite that used in this works was taken from Turen, and Difractogram of zeolite has been reported by Wardhani, Rahman, Purwonugroho, & Tjahjanto (2016).…”

TiO2-High Surface Area Materials Based Composite Photocatalytic Nanomaterials for Degradation of Pollutants: A Review

“…This is due to the incorporation of TiO 2 on the external surface of zeolite than the solvothermal method [157]. Similarly, various research efforts have been performed [Table 4, [158][159][160][161][162][163][164][165][166][167][168][169][170][171][172][173][174][175] and still the research is ongoing to prepare TiO 2 /zeolite based composite photocatalytic materials.…”