片状纳米碱式碳酸铜在日光下类芬顿降解水中染料

Fenton-Like Degradation of Dye by Cupric Subcarbonate Nanosheets Assisted under Sunlight Irradiation

纳米片碱式碳酸铜(NCSB)采用液相化学沉淀法制备,通过热重分析(TG-DSC)、X射线衍射(XRD)、傅里叶变换红外(FT IR)和扫描电子显微镜(SEM)对其微观结构和形态进行表征。考察了制备NCSB碳酸盐与硫酸铜的物质的量的比和表面活性剂十二烷基硫酸钠(SDS)用量的影响。研究了在中性条件下,NCSB的类芬顿和光芬顿的催化活性。甲基橙(MO)的降解率与罗丹明B(RB)和亚甲基蓝(MB)的降解率差异显著。试验表明,NCSB对甲基橙阳光下光芬顿的催化活性明显好于其类芬顿过程。NCSB循环使用5次依然具有高催化活性,NCSB在催化降解MO染料废水方面具有应用价值。

Cupric sub-carbonate(NCSB)nanosheets were prepared by chemical precipitation in aqueous solution.The micro-structure and morphology of as-grown samples were characterized by thermogravimetric analysis(TG-DSC),X-ray diffraction(XRD),Fourier transform infrared(FT IR)and scanning electron microscope(SEM).Some important operational parameters of NCSB,such as reaction temperature,sodium dodecyl sulphate(SDS)dosage and molar ratio of sodium carbonate and copper sulphate,were investigated in this work.In addition,the catalysis activity of NCSB was examined in Fenton-like and photo-Fenton-like oxidation under neutral conditions.The degradation efficiencies of methyl orange(MO),rhodamine B(RB)and methylene blue(MB)were significantly different.It was found that the degradation rate of MO was increased greatly by NCSB in comparison with the oxidation of hydrogen peroxide under sunlight irradiation.NCSB exhibited high stability in recyclable degradation,which suggests promising applications in practical MO dye pollutant treatment.