Catalytic activity and kinetic equation of nitrogen-doped TiO(2) nanoparticle for 4-chlorophenol under visible light

N-doped TiO(2) nanoparticle was prepared through a sol-gel procedure using NH(4)Cl as the nitrogen source. The photocatalytic degradation yield of 4-chlorophenol and the removed yield of total organic carbon (TOC) were measured. The main influence factors including the calcination temperature, stirring speed, and pH value of 4-chlorophenol were investigated for the catalytic activity and kinetic equation of N-doped TiO(2) under visible light (( > 400 nm). The results showed that the N-doped TiO(2) had obvious catalytic activity under visible light, when the calcination temperature was 400 deg C, stirring speed was quick and pH value of 4-chlorophenol was 4.6, the degradation yield of 4-chlorophenol was the maximum. As the irradiation time was 6 h, the degradation yield of was 87%. The kinetic equation of photocatalytic degradation of 4-chlorophenol was corresponded to Langmuir-Hinshelwood equation.