In this work surface modified polyacrylonitrile nanofibers/biogenic silica composites were investigated for their promising and efficient photocatalytic degradation of malachite green (MG) dye. This photocatalyst was based on polyacrylonitrile (PAN) nanofibers fabricated using electrospinning technique, then crosslinked with two kinds of biogenic silica, diatomite and rice husk nanosilica. The photocatalytic activities of MG dye were compared for the two biogenic silica. The prepared membranes was analyzed using SEM, TEM, EDAX, FTIR, and XRD techniques. The photocatalysis performance investigations of malachite green were carried out under visible light illumination in aqueous solutions. Moreover, several factors affecting the degradation were studied including; dye concentration, solution pH, and irradiation time. The results indicated that the investigated composite nanofibers have excellent photodegradation performance for Malachite green. The highest photodegradation efficiency of the MG was obtained at pH 7 and it is relatively a very fast process.

在这项工作中，研究了表面改性的聚丙烯腈纳米纤维/生物硅复合材料对孔雀石绿（MG）染料的有前途和有效的光催化降解作用。该光催化剂基于使用静电纺丝技术制备的聚丙烯腈（PAN）纳米纤维，然后与两种生物硅，硅藻土和稻壳纳米二氧化硅交联。比较了MG染料对两种生物硅的光催化活性。使用SEM，TEM，EDAX，FTIR和XRD技术分析制备的膜。在水溶液中可见光照射下进行了孔雀石绿的光催化性能研究。此外，研究了影响降解的几个因素，包括：染料浓度，溶液pH值和照射时间。结果表明，所研究的复合纳米纤维对孔雀石绿具有良好的光降解性能。MG的最高光降解效率是在pH值为7的情况下进行的，这是一个非常快速的过程。