Synthesis and Photocatalytic Activity of Ti-pillared Bentonite

Abstract

Ti‐pillared bentonite has been successfully prepared using a modified method that can induce the transformation of TiO2 pillar from amorphous to anatase phase at a low temperature (150°C). The value of d001 =1.94 nm obtained by Ti‐pillared bentonite is larger than that of corresponding raw clay (1.56 nm). Due to large numbers of Ti‐pillars formed, the Ti‐pillared bentonite shows an excellent ability in adsorbing Rhodamine B (RB). The photocatalytic activity and kinetic equation are investigated by decomposing RB solution under the UV irradiation. It is found that the Ti‐pillared bentonite shows super photocatalytic activity for the degradation of RB solution compared with the untreated bentonite and pure TiO2, and the kinetic equation of the degradation of RB solution is a 1.5‐oder equation.

Synthesis and photocatalytic property of the ZrO2/TiO2 pillared laponite

“…However, in recent years the TiO 2 pillared natural clays (Ti-PILCs) used as the photocatalyst have been drawn much attention due to its permanent m i c r o p o r o s i t y, l a rg e s u r f a c e a r e a a n d g o o d adsorption [5] , it can not only immobilize photocatalyst in its interlayer but acts as an absorbent [6] , which can greatly increase the contact between TiO 2 and organic pollutants, and the adsorption and enrichments of target pollutants on the surface of TiO 2 can effectively improve the photodegradation [7,8] . However, the purity of natural clay is limited, and it needs to be purifi ed or modified before use.…”