The invention belongs to the technical field of
water pollution photocatalysts and relates to a hollow-structure
biomass charcoal / TiO2 multi-wall tube / CuO photocatalyst. The hollow-structure
biomass charcoal / TiO2 multi-wall tube / CuO photocatalyst is prepared through compounding hollow-structure
biomass charcoal, TiO2 multi-wall tubes and
CuO nanoparticles. The invention further discloses a preparation method of the photocatalyst; the preparation method comprises the following steps: pre-treating biomasses through washing, crushing,
acid washing and the like; after dissolving the biomasses intoa
titanium solution, carrying out ultrasonic treatment for 20 to 40min;
drying for 4 to 8h at 40 to 60 DEG C, so as to obtain a
titanium source / biomasses; putting the
titanium source / biomasses into amuffle furnace and carrying out high-temperature
calcination for 2 to 6h; immersing into a
copper solution for 3 to 6h; after washing, immersing into a
copper solution and washing; after repeating for 10 to 20 times,
drying for 10h at 50 to 70 DEG C; finally, carrying out high-temperature
calcination for 2 to 4h under the protection of
nitrogen gas and naturally cooling to obtain the photocatalyst. The preparation method disclosed by the invention is controllable and has simple
reaction conditions; the high specific surface area of the hollow biomass charcoal is combined with the
photocatalysis performance of TiO2 and the
catalysis performance of CuO, and
ammonia nitrogen is efficiently and rapidly removed.
Ammonia nitrogen wastewater is removed through experimental
simulation and the highest removal rate under the
irradiation of
ultraviolet rays reaches 99.5 percent.