Synthesis of Ni-doped TiO_2 Mesoporous Material via Solid-state Reaction at Low Temperature and its Kinetics of Methyl Orange Photodegradation

With tetrabutyl orthotitanate and nickel(Ⅱ) chloride hexahydrate as original materials and cetyltrimethylammonium bromide as a template agent,Ni-doped TiO2 mesoporous material was successfully prepared by solid-state reaction.The textural properties of the materials were characterized by the X-ray diffraction,high resolution transmission electron microscope(HRTEM),N2-physisorption at 77K,fourier transform infrared spectroscope(FTIR),Raman spectroscope and ultraviolet visible light spectroscope.The components of Ni-TiO2 were determined by inductively couple plasma atomic emission spectrometry.The photodegradation properties of this material for methyl orange were detailedly investigated.The results show that nickel is incorporated into the framework of TiO2 with content of 3.62wt%.Furthermore,Ni-doped TiO2 with anatase phase is laced the wall with the amorphous grain boundary and crystallite with some defect structures and nickel oxides.For Ni-doped TiO2 mesoporous material,the specific surface area of 102.4m2/g and the pore radii distribution centre of 2.4nm are obtained.At 298K,the rule of pseudo-first-order reaction and the concentration effect are found in the photodegradation process of methyl orange on the Ni-doped TiO2 mesoporous material surface,where the reaction rate constant is two times higher than that on pure TiO2.