Abstract: Using heterogeneous photocatalysts and photosensitizers to catalyze dicyclopentadiene intramolecular [2+2] cycloaddition reactions，it was found that the photocatalytic efficiency could be greatly improved. In particular, the composite M_xO_y-TiO₂ photocatalyst doped with other metals could catalyze the conversion of materials in a relatively short time and obtain pentacyclo [5.3.0.0^2,5.0^3,9.0^4,8] decane (BCU) with a higher yield. The density and volumetric calorific value of BCU caged hydrocarbon compound were higher than that of JP-10 liquid fuel. After the mixture with JP-10 liquid fuel, the density and volumetric calorific value of the complex fuel increased with the increase of BCU mixing ratio, at the same time had good low-temperature performance and low-temperature viscosity. When the mass fraction of BCU was 50%, the fuel density（20 ℃）was 0.995 g/cm³, the volumetric calorific value was 41.2 MJ/L, the freezing point was -43.8 ℃, and the dynamic viscosity（-20 ℃） was 19.3 mm²/s. Compared with JP-10, the compound fuel had a great increase in the density and volumetric calorific value, while maintaining good low temperature performance. The results showed that BCU could be used as a high performance fuel component and had a good application prospect.

Key words: photocatalyst, photosensitizer, dicyclopentadiene, [2+2] cycloaddition, high performance fuel