Ti-BEA-F was synthesized hydrothermally in fluoride media by adapting a previously published procedure. TEAF was dissolved in deionized H 2 O in a polypropylene container and combined with TIPO to produce a clear homogeneous solution. TEOS was then added slowly over a period of one minute to this solution under static conditions, which initially formed a biphasic mixture. The mixture was then stirred for 16 h to produce an opaque homogeneous solution. The lid to the polypropylene container was then removed to evaporate the ethanol and isopropanol that form through the hydrolysis of the TEOS and TIPO, respectively. The solution was left open while stirring until the mass of the solution decreased by 115% of the value of the estimated mass of the alcohols to ensure that the alcohols evaporated completely. Subsequently, deionized H 2 O was added to yield a gel with a final molar composition of 1 SiO 2 : 0.0033 TIPO: 0.56 TEAF: 7 H 2 O. This gel was then loaded into a Teflon-lined stainless-steel autoclave (Parr instruments, 45 cm 3 ) that contained 5 wt. % (relative to SiO 2 within the gel) dealuminated BEA as seeds to promote the formation of the BEA zeolite framework. This autoclave was then sealed and heated to 413 K while rotating (60 rpm) in a convection oven (Yamato, DKN602C) for 25 days. The resultant solids were recovered, washed with H 2 O, and dried for 16 h at 373 K. The dried solids were then heated at 1 K min -1 to 823 K in flowing air (100 cm 3 min -1 ) and held at 823 K for 10 h to produce a bleached-white solid. Ti-MFI was synthesized hydrothermally in either hydroxide or fluoride media. A desired amount of the TiBO precursor was dissolved in 27.7 g of TEOS in a polypropylene bottle with a screw cap to form a homogeneous solution that was subsequently cooled to 273 K. Separately, a mixture of 28.7 g of TPAOH and 50.5 g of H 2 O was cooled to 273 K and was added slowly (over a period of ~1 min) to the TEOS solution, which yielded a biphasic mixture. This solution was warmed to 298 K and stirred for 12 h to produce a clear homogeneous solution, which indicates successful hydrolysis of the metal precursor and TEOS. The cover was then removed to completely evaporate the alcohol (e.g., ethanol, butanol) formed through hydrolysis of TEOS and the metal alkoxides. To ensure the complete evaporation of the alcohols, an additional 15 wt. % of the calculated mass of the alcohols was evaporated over the course of 24 -48 h and deionized H 2 O was added to make up for the excess liquid evaporated. This solution was then loaded into a Teflon-lined stainless-steel autoclave. While in the Teflon liner, a desired amount of HF (warning: HF is extremely dangerous and should be handled very carefully) was added to the synthesis gel and stirred manually with a polypropylene spatula for ~10 seconds prior to gelation. Notably, the addition of at least an equimolar amount of HF, with respect to TPAOH, increases the viscosity of the synthesis gel significantly. These steps yield a gel with the approximate composition of 1 Si : 0.0033 M : 0.43 TPAOH : a HF : 28.3 H 2 O, where a depends on the amount of HF added. A small amount of Ti-MFI seeds (5% by mass relative to SiO 2 ) from a previous synthesis in OH -media were added to promote the crystallization of MFI. These autoclaves were then heated to 443 K while rotating (30 rpm) in a convection oven for 3 -7 days. The resulting solids were recovered by centrifugation, washed with H 2 O, and dried for 16 h at 373 K. The dried solids were then heated in flowing air (100 cm 3 min -1 ) to 823 K at 1 K min -1 and held for 10 h to produce M-MFI materials that were bleached white in appearance.