1 Thermal Stability of Ti-MCM-41: Effects of Ti loading Amount and Synthesis Conditions N. N. Opembe a , E. Vunain a, b , A. K. Mishra b , K. Jalama c and R. Meijboom a* a Research Centre for Synthesis and Catalysis, Department of Chemistry, University of Johannesburg, P.O.Box 524, Auckland Park, Johannesburg 2006, South Africa. b Department of Applied Chemistry, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, South Africa c Department of Chemical Engineering, University of Johannesburg, P. O. Box 17011, Doornfontein, Johannesburg, 2028, South Africa. *Corresponding author Email address: rmeijboom@uj.ac.za Abstract Ti containing mesoporous MCM-41 materials have been synthesized through two methods: heating and non-heating (room temperature). The synthesized materials have been characterized using X-ray diffraction, Fourier Transform Infrared, nitrogen sorption, and X-ray fluorescence methods and their thermal stabilities evaluated using thermogravimmetric methods in an inert atmosphere. The thermal stabilities have been analyzed based on the synthesis method as well as on the amount of titanium in the MCM-41 materials. The thermal stability results suggest that uncalcined MCM-41 materials generally show higher weight loss than their calcined counterparts. Also, the room temperature-synthesized materials showed lower stability than the high temperature synthesized samples for the uncalcined samples. It’s also been found that MCM-41 materials show improved thermal stabilities as the amount of titanium is increased. Keywords: Ti-MCM-41, mesoporous materials, thermal stability