Preparation of imitation enzyme catalyst by modified natural hemin and its application in the degradation of hydroquinone

Choosing the natural Hemin as raw materials, through iron removal esterification, hydrolysis and complexation of zinc ions,the protoporphyrinato zinc was synthesiced. Then it was loaded on the hydroxyl function of cellulose magnetic microspheres carrier surface bridged with cyan uric chloride and the supported protoporphyrinato zinc imitation enzyme catalysts was synthesiced. The catalyst was characterized by UVvisible( UV-Vis) spectrophotometer,inductively coupled plasma atomic emission spectroscopy( ICP-OES),Fourier transform infrared spectrometer( FT-IR), transmission electron microscopy( TEM), thermogravimetric analysis( TGA) and vibrating sample magnetometer( VSM). The catalyst photocatalytic degradation of hydroquinone( HQ) under different conditions was investigated. The results showed that under simulated sunlight irradiation 6 h,the catalyst dosage was 20 mg,the initial concentration of HQ was20 mg·L- 1and pH was 6. 5,HQ degradation rate reached 95. 52%,and after reuse 10 times,the degradation rate of HQ was above 86%.