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以氯化血红素为原料,制备了磁负载的硝基锌卟啉光催化剂.同时,利用热重分析仪(TG)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)和振动磁强计(VSM)对催化剂进行了表征,发现制备的催化剂负载率为32.06%,催化剂为粒径均一的球形壳-核结构,具有良好的磁性.其次,研究了催化剂的催化降解性能.结果表明,磁负载硝基锌卟啉光催化剂在可见光下,对水中的双酚A(BPA)、对硝基苯酚(PNP)等均有90%以上的去除率;对于活性红染料废水的降解也取得了83.67%的降解率.自由基捕获实验证明,电子(e-)、羟基自由基(·OH)、空穴(h+)和氧自由基(O-·2)是降解反应中重要的活性物种.最后通过GC-MS等手段对降解机理进行了研究.
Magnetically supported nitrozinc porphyrin photocatalyst was prepared by using hemin as raw material.At the same time, thermogravimetric analysis (TG), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and vibrating magnetometer (VSM) was used to characterize the catalyst. The catalyst loading rate was 32.06%. The catalyst was a spherical shell-core structure with uniform particle size and good magnetic properties.Secondly, the catalytic degradation performance of the catalyst was investigated.The results showed that the magnetic Under the visible light irradiation, the supported Zn (II) -Zn porphyrin photocatalyst has more than 90% removal rate of bisphenol A (BPA), p-nitrophenol (PNP) and so on. The degradation of reactive red dye wastewater also achieved 83.67 % Of the degradation rate.Free radical capture experiments show that the electron (e-), hydroxyl radicals (· OH), holes (h +) and oxygen radicals (O- · 2) is an important active species in the degradation reaction.Finally The degradation mechanism was studied by GC-MS and other means.