Activity for phenol hydroxylation

The three TS-1 catalysts with similar Ti contents have cuboidal morphology with comparable particle sizes of 0.2-0.3 pum (as shown in SEM pictures, Fig. 53). The EPR spectra of the samples in contact with aqueous H202 (46%) (Fig. 54) indicate that the ratio of the A to B superoxo species in various TS-1 samples increases in the order TS-1 (fluoride) < TS-1 (with anatase) < TS-1 (without anatase). Catalytic activity for phenol hydroxylation and allyl alcohol epoxi-dation (Table LIII) was found to parallel the A/B ratio of the oxo-Ti species (TS-1 (fluoride) < TS-1 (with anatase) < TS-1 (without anatase)). 

Lin S., Zheng Y., Xu L.-M. and Wang S.-M., Synthesis, characterization and catalytic activity for phenol hydroxylation of rare earth molybdovanadophosphate tetrabasic heteropoly complexes with Keggin structure., Chem. J. Chinese Univ., 21 (2000) pp. 1248 (in Chinese). 

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